The heat gained by the water is 627 Joules.
To find the heat gained by the water, we can use the formula:
q = mcΔT
where q is the heat gained, m is the mass of the substance, c is the specific heat capacity, and ΔT is the change in temperature.
For water, the specific heat capacity (c) is 4.18 J/(g°C). The mass (m) of the water is 75.0 g, and the change in temperature (ΔT) is the final temperature (20.0°C) minus the initial temperature (18.0°C), which equals 2.0°C.
Using the formula:
q = (75.0 g) × (4.18 J/(g°C)) × (2.0°C)
q = 627 J
So, the heat gained by the water is 627 Joules.
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What are the (3) most commonly used chemical sanitizers and their PPM?
bleach) containing 50 to 100 micrograms (ppm) of chlorine. The most common sanitizers on the market contain chlorine. the quaternary ammonium (QUAT, QAC) Maintaining concentration: as instructed by the manufacturer. Iodine. Concentration ranges from 12.5 to 25 ppm.
What disinfectants spring to mind?The three main chemical substances that are used as sanitizers in the food service industry are iodine sanitizers, chlorine-based cleansers, and cleaners. The most used molecular sanitizing agent is chlorine since it is both very effective and inexpensive.
Is rubbing alcohol a sanitizer?It may successfully eradicate a variety of pathogens, including bacteria, hepatitis, and fungi, due to its effectiveness as a germicide. Rubing alcohol can be used as a household cleaner, but it is widely employed in medical settings to clean hands.
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What is the pressure of a mixture of nitrogen carbon dioxide and oxygen?
The pressure of a mixture of nitrogen, carbon dioxide, and oxygen gases (PO₂ = 254 mm Hg, PN₂ = 0.351 atm, and PCO₂ = 43.9 kPa) is 113.3 kPa
The total pressure exerted by a gas mixture is the sum of the partial pressures of the component gases. For example, Earth's atmosphere is a mixture of gases consisting of nitrogen, oxygen, argon, carbon dioxide, and other gases. Partial pressure is the pressure that each gas has in a mixture so that the pressure of each gas is not affected by the presence of other gases.
The partial pressure formula is:
Ptotal = PNitrogen + Poxygen + PCarbon dioxide.
In question:
PO₂ 254 mm Hg = 33.9 kPa
PN₂ 0.351 atm = 35.5 kPa
PCO₂ = 43.9 kPa
So,
Ptotal = PO₂ + PN₂ + PCO₂
Ptotal = 33.9 kPa + 35.5 kPa + 43.9 kPa
Ptotal = 113.3 kPa
The pressure of a mixture of nitrogen, carbon dioxide and oxygen gases are 113.3 kPa.
Complete the question:
What is the pressure of a mixture of nitrogen carbon dioxide and oxygen gases if the pressures of these gases are as follows: PO2 = 254 mm Hg, PN2 = 0.351 ATM, and PCO2 = 43.9 kPa?
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3-less than or equal to -5x graph in slope intercept form question #9
9. The slope for the given equation 3- y ≤ -5x is 5 and intercept is 3.
What is meant by slope intercept method?Slope-intercept form (y=mx+b) of linear equations highlights the slope (m) and y-intercept (b) of line. The slope intercept formula y = mx + b is used when you know the slope of line that is to to be examined and point given is also the y intercept (0, b). In this formula, b represents y value of the y intercept point.
The slope intercept for of linear equation is: y = mx +b
m is slope and b is y intercept.
So, y = 5x + 3
Now m = 5 ; so the slope is 5
b = 3 ; hence y-intercept is 3
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What is the best description of a mole?
A mole is described as the amount of substance that has as many particles as there are atoms in exactly 12 grams of carbon 12 isotope.
A mole refers to the amount of substance that has as many particles as there are atoms in exactly 12 grams of carbon 12 isotope. A mole shows 6.022×1023 particles irrespective of their nature. The symbol of a mole is 'mol'. And one mole is equal to 6.022×1023.
A mole is a standard scientific unit that measures large quantities of very small entities such as molecules, atoms, or other specified particles.
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1. Identify each of the following as a measurements of length,area, volume, mass, density, time or temperature:
a)ns
b)10.0 kg/m3
c) 1.2 pm
d)750 km2
e) 83 K
f) 4.0 mm3
2. Carry out the following operations, and express the answerwith the appropriate number of significant figures and units:
a) (5.231 mm)(6.1 mm)
b) 72.3 g/1.5 mL
c) 12.21 g + 0.0132 g
d) 31.03 g + 12 mg
3. Drug medications are often prescribed on the basis of bodyweight. The adult dosage of Elixophyllin, a drug used to treatasthma, is 6 mg/kg of body mass. Calculate the dose in milligramsfor a 150-lb person.
4. A man who is 5 ft. 8 in. tall weighs 160 lb. What is hisheight in centimeters and his mass in kilograms.
In the same way, as the U.S. customary system employs feet, quarts, and ounces to measure these things, the metric system measures length, liquid volume, and mass in units like meter, liter, and gram.
The metric system uses kilograms or grams to measure mass, meters or kilometers to measure distance, and liters to measure volume. Time doesn't have any quantifiable physical qualities. The length of time between two events is what we are actually counting. People have used a variety of methods throughout history to keep track of the passage of time, including sunrise and sunset times and moon phases. Volume, which is measured in cubic units, is the area in three dimensions that matter occupies or that is encircled by a surface. The cubic meter (m3), a derivation of the SI unit of volume.
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When the following reactions come to equilibrium, does the equilibrium mixture contain mostly reactants or mostly products?
H2 (g) + S (s) <--> H2S (g) Kc = 7.8 x 105
N2 (g) + 2H2 (g) <--> N2H4 (g) Kc = 7.4 x 10-26
Is large, the equilibrium mixture is mostly products. If Kc is small, the equilibrium mixture is mostly reactants. When Kc is approximately 1, the equilibrium mixture contains appreciable amounts of both reactants and products.
What is equilibrium?Equilibrium is the state in which market supply and demand balance each other, and as a result prices become stable. Generally, an over-supply of goods or services causes prices to go down, which results in higher demand—while an under-supply or shortage causes prices to go up resulting in less demand.The balancing effect of supply and demand results in a state of equilibrium.The equilibrium price is where the supply of goods matches demand. When a major index experiences a period of consolidation or sideways momentum, it can be said that the forces of supply and demand are relatively equal and the market is in a state of equilibrium.Economists find that prices tend to fluctuate around the equilibrium levels. If the price rises too high, market forces will incentivize sellers to come in and produce more. If the price is too low, additional buyers will bid up the price. These activities keep the equilibrium level in relative balance over time.To learn more about momentum refer to:
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Draw a chiral ketone with the formula C6H12O.
One of the chiral ketones which has the formula of C₆H₁₂O is Methyl isobutyl ketone
MIBK is used as a solvent in factories that manufacture paints, rubber products, chemicals, and machinery. As a solvent, it is used in pesticide spraying. Pharmaceutical companies that manufacture prescription drugs also use his MIBK. MIBK enhances and retains flavor and aroma.
Unlike acetone and butanone, MIBK has fairly low solubility in water. It has similar polarity to ethyl acetate but is more acid/base stable. This and its low density make it suitable for liquid-liquid extraction. These are the uses and applications of one of the chiral ketones.
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How are weather and climate different from each other?
Climate is the average weather of the area over a long term period. weather is short-term changes in the atmosphere
Answer: Weather refers to a short-term change in the atmosphere or temperature, while climate is over a long period of time.
Which reaction would not occur as written due to the Activity Series of Metals (found in your Chemistry Reference Table)?
A. 3 Mg + 2 AlCl3 --> 3 MgCl2 + 2 Al
B. Al + NaCl --> AlCl3 + Na
C. Ca + CuCl2 --> CaCl2 + Cu
D. 2 K + 2 H2O --> 2 KOH + H2
The reaction Al + NaCl → AlCl₃ + Na among the given reactions will not occur according to the reactivity series. Therefore, option B is correct.
What is reactivity series?The reactivity series of metals can be described as the arrangement of metals in the decreasing order of their reactivities.
The metals at the top of the activity series are strong reducing agents as they can easily oxidize. These metals easily corrode. The reducing ability gets weaker moving down the series.
The electropositive elements reduce as move down the activity series of metals. All metals above hydrogen in the reactivity series emit hydrogen gas upon reacting with dilute HCl.
Aluminum metal lies down to the sodium metal so it can not displace sodium metal therefore, this reaction is not possible.
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Which of the following groups contains the most reactive elements?a. the alkali metalsb. the alkaline earth metalsc. the carbon familyd. the noble gase
Option (a) is correct. The alkali metals contains the most reactive elements. It is present in the group 1 of the periodic table.
In the periodic table, Group 1 includes hydrogen and the alkali metals. Because they have just one valence electron, group 1 elements are very reactive. The atoms of Alkali metals can easily give away the one outer-level electron. This is due their larger atomic radii and low ionization energies. These metals are most reactive. Alkali metal tend to donate their electrons in reactions and have an oxidation state of +1. These alkali metals are characterized by their soft texture and silvery color. They have low boiling point and melting points. These are less dense. Lithium, sodium and potassium float on water because of their low density. This explains the alkali metals.
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What would the mass be, in grams, of 1.99 x 1024 molecules of P4010?
Avogadro's constant says that 1 mole of any atom [tex]6.022*10^2^3[/tex] contains atoms. In this case, you have [tex]1.99 * 10^2^4[/tex] atoms:
[tex]1.99*10^2^4/6.022*10^2^3=3.3[/tex]
1 mole of p4010 = 283.889
So [tex]1.99* 10^2^4[/tex] molecules mass is
[tex]283.889*3.3=936.833 gram[/tex]
Therefore, the mass in grams, of 1.99 x 1024 molecules of P4010 is 936.833 grams.
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What is an ionic bond with two suitable examples explain the difference between an ionic and a covalent bond?
Covalent bonds are created between two nonmetals, whereas ionic bonds are formed between a metal and a nonmetal.
Covalent bonds between atoms develop when there is little to no difference in the electronegativity of the atoms, whereas ionic bonds form when there is a large difference.
Covalent bonds are created when the half-filled atomic orbitals of two different atoms overlap, but ionic bonds cannot be created by overlapping orbitals.
For example, the ionic bond in NaCl is written as Na⁺Cl⁻ because sodium is a metal and chlorine is a non-metal.
Let's use methane as an example. Due to the low difference in electronegativity between carbon and hydrogen, the atomic orbitals of these two elements meet in this molecule and form a covalent bond.
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all ________ are metazoans.
All species of life are metazoans. Eukaryotes with several cells and mitochondria are called metazoan animals.
What makes animals metazoans?All multicellular organisms with differentiated body parts, including tissues and organs, belong to the Metazoa group. They have specialized cells lining the cavity of their digestive system. They have nucleated cells with cell membranes.
How can you recognize a metazoan?The majority of metazoans have bilateral symmetry. They display the division of labor. The body organization of lower invertebrates is at the tissue or organ level, whereas the body organization of larger invertebrates and vertebrates is at the organ-system level. Unlike protozoans, which have a cell wall, animals don't.
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PLEASEE HELPP ASAPPP IM DYING HERE HAHA PLSS :(
Decomposition - 5
Combustion - 3
Synthesis - 4
Double replacement - 1
Single replacement - 2
Decomposition reaction is the breaking down of one reactant into multiple substances/fragments/parts due to external sources of energy.
Combustion is the burning of any material and we know that burning is a reaction with oxygen.
Synthesis is the formation of one compound from multiple reactants i.e. one product.
A double replacement or double displacement reaction takes place like this: AB + CD --> AC + BD
In single displacement reactions, one element is substituted for another element in the final compound, i.e. A + CD --> AC + D
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A 25.0 g piece of brass at 325 °C was placed into a sample of water. The final temperature of the water and brass was 42.0 °C. How much energy is released by the brass?
The energy released by the brass is an example of the heat of fusion.
How much energy is released by the brass?The heat released by the brass can be calculated using the equation:q = m × c × ΔTwhere q is the amount of energy released (in Joules), m is the mass of the brass (25.0 g), c is the specific heat capacity of brass (0.385 J/g•°C), and ΔT is the change in temperature (325 °C - 42.0 °C = 283 °C).Therefore, the energy released by the brass is:q = (25.0 g) × (0.385 J/g•°C) × (283 °C)q = 29,202.5 JHeat of fusion is the amount of energy released or absorbed when a substance changes from a solid to a liquid or vice versa. In this case, the brass is changing from a solid to a liquid and releasing energy in the process. The energy released can be calculated using the formula: q = m·ΔT·c, where q is the heat of fusion, m is the mass of the brass, ΔT is the change in temperature, and c is the specific heat capacity of the brass.The mass of the brass is 25.0 g. The change in temperature is 325 °C - 42.0 °C, or 283 K. The specific heat capacity of brass is 0.387 J/g·K. Plugging these values into the equation gives us a heat of fusion of 2,969.2 joules. This is the amount of energy released by the brass when it changed from a solid to a liquid.To learn more about The mass of the brass refer to:
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Answer:
-283 C
Explanation:
I got it right
Element Molar mass (\pu{g/mol}g/molg, slash, m, o, l)
\ce{H}HH 1.0081.0081, point, 008
\ce{C}CC 12.0112.0112, point, 01
\ce{O}OO 16.0016.0016, point, 00
Using the information in the table, calculate the number of moles in a \pu{5.73 kg}5.73 kg5, point, 73, space, k, g sample of lactic acid (\ce{C3H6O3}CX
3
HX
6
OX
3
).
The number of moles in the 5.73 Kg sample of lactic acid, C₃H₆O₃, is 63.61 moles
How do I determine the number of moles in the sample?The relationship between number of mole and molar mass is given below:
Number of mole = mass / molar mass
With the above formula, we can obtain the number of mole in the 5.73 Kg sample of lactic acid, C₃H₆O₃. Details below:
Molar mass of H = 1.008 g/molMolar mass of C = 12.01 g/molMolar mass of O = 16 g/molMolar mass of C₃H₆O₃ = (12.01 × 3) + (1.008 × 6) + (16 × 3) = 36.03 + 6.048 + 48 = 90.078 g/molMass of C₃H₆O₃ = 5.73 Kg = 5.73 × 1000 = 5730 gNumber of mole of C₃H₆O₃ =?Mole = mass / molar mass
Number of mole of C₃H₆O₃ = 5730 / 90.078
Number of mole of C₃H₆O₃ = 63.61 moles
Thus, the number of mole of the lactic acid, C₃H₆O₃ is 63.61 moles
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Predicting products of chemical reactions worksheet
Predict the products of the reactions below. Then, write the balanced equation and classify the reaction. If a
precipitate forms, indicate by using (s) by the precipitate. If "no reaction" occurs write N.R. beside the
question.
Use your activity series, predicting products helper sheet and the solubility rules.
1. magnesium bromide + chlorine →
2. aluminum + iron (III) oxide →
3. silver nitrate + zinc chloride →
4. sulfuric acid (H2SO4) + sodium hydroxide →
5. aluminum + oxygen →
Product prediction and solubility rules in the following chemical reactions
1. magnesium bromide + chlorineMgBr2 (aq) + Cl2 (g) → MgCl2 (aq) + Br2 (aq)
Reaction type: Substitution
2. aluminum + iron(III) oxide2 Al (s) + Fe2O3 (s) → Al2O3 (s) + 2 Fe (s)
Reaction type: Redox
3. silver nitrate + zinc chlorideZnCl2 + 2 AgNO3 → Zn(NO3)2 + 2 AgCl
Reaction type: Double substitution
4. sulfuric acid (H2SO4) + sodium hydroxideH2SO4 (aq) + 2 NaOH (aq) → Na2SO4 (aq) + 2 H2O (l)
Reaction type: Neutralization
5. Aluminum + oxygen4 Al (s) + 3 O2 (g) → 2 Al2O3 (s)
Reaction type: Oxidation
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use the table of temperatures measured in two areas of a house to answer the question
which statement best explains the temperature difference?
A. energy is transferred between the areas when molecules touch
B. energy from the cooler air is transferred upstairs
C. the cooler air downstairs loses energy to the environment
D. warm air rises by convection to the upstairs
According to the concept of thermal energy, the statement which best explains the temperature difference is that warm air rises by convection to the upstairs.
What is thermal energy?Thermal energy is defined as a type of energy which is contained within a system which is responsible for temperature rise.Heat is a type of thermal energy.It is concerned with the first law of thermodynamics.
Thermal energy arises from friction and drag.It includes the internal energy or enthalpy of a body of matter and radiation.It is related to internal energy and heat .It arises when a substance whose molecules or atoms are vibrating faster.
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How many grams of potassium hydroxide (KOH), exist in 12.50 X 1019 molecules of KOH?
1.343 x 10²³ grams of potassium hydroxide (KOH), exist in 12.50 X 1019 molecules of KOH.
What does Avogadro's number mean?The quantity of units in one mole of any substance is called the Avogadro number, also referred to as the Avogadro constant. The comparable number is 6.0221408571023. The units may be electrons, ions, atoms, or molecules, depending on the type of reaction occurring and the substance being utilized. Two gases of the same volume have the same number of molecules when they are at the same temperature and pressure, according to Amedeo Avogadro.
Given:
0.2228 mol of potassium hydroxide in 12.50 X 1019 molecules of KOH
Hence in one mole, there is Avogadro number of molecules
i.e. 6.023 × 10²³ molecules.
no of atoms = 0.223 x 6.023
= 1.343 x 10²³
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what is the percentage mass of oxygen of magnesium nitrate with working
Answer:
below on my bule
Explanation:bule
A 58.0 g sample of unknown composition was carefully analyzed and found to consist of 24.3 g of carbon, 3.072 grams of hydrogen, 5.406 g of oxygen, and the remainder of nitrogen.
Answer:
Mass of nitrogen = 25.222g
Explanation:
We know that the mass of the unknown composition is 58.0g, so the total mass must add up to 58.0g, so let's make the unknown mass of nitrogen = x
24.3g + 3.072g + 5.406g + x = 58.0g
32.778g + x = 58.0g
x = 58.0g - 32.778g = 25.222g
0.0269 moles of CaO are reacted, how many grams of CaOH2 will be produced
Answer:
Ok so, 0.0269 moles of CaO are reacted, how much of CaOH2 will produce.
Explanation:
How many grams are in a mole of Ca OH 2?
74.093 grams
so you need to multiply 0.0269 * 74.093 = 1.9931017
so 1.9931017 CaOH2 will be produced
Please help Chemistry will give brainliest if right!
54.0 g Al reacts with 64.0 g O2 to
form Al2O3 according to the equation.
4AI + 302 → 2Al2O3
Al: 27 g/mol Al2O3: 102 g/mol
How many grams of Al2O3 form
from 54.0 g Al?
[ ? ] g Al2O3
Answer: Don't know if this is right but try 102 g.
Explanation: I put this into acellus and it was correct so see if that works.
What type of epithelium is found along most of the digestive tract?
In humans, simple columnar epithelium is the type of epithelium that found along most of the digestive tract including the stomach, and intestines.
Simple columnar epithelium is made up of a single layer of tall, slender columnar epithelial cells with oval-shaped nuclei that are linked to the basement membrane in the basal region. The majority of the digestive tract's organs in humans, including the stomach and intestines, are lined by simple columnar epithelium. The uterus is lined with simple columnar epithelium as well.
There are two further classifications for simple columnar epithelium: ciliated and non-ciliated (glandular). Tiny hairs on the ciliated portion of the simple columnar epithelium assist in moving mucus and other materials along the respiratory system.
The majority of the human digestive tract, including the stomach and intestines, is lined by simple columnar epithelium.
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Titanium (IV) oxide (TiO2) is a white substance that is produced by reaction between the mineral ilmenite (FeTiO3) and sulfuric acid:
FeTiO3 + H2SO4 -> TiO2 + FeSO4 + H2O
In one process 8.00 X10 3 kg of FeTiO3 yielded 3. 67 X 103 kg of TiO2. What is the yield of the reaction?
Sulfuric acid reacts with the mineral ilmenite to form titanium(IV) oxide (TiO2), a white material. The reaction has a Percentage of yield 76.3%.
What is Percentage of yield ?The amount of product actually made compared with the maximum calculated yield is called the percentage yield.
The amount of product produced by a chemical reaction is known as the real yield.The amount of product derived from a stoichiometric or balanced equation utilizing the limiting reactant to calculate product is known as the theoretical yield.Actual yield/Theoretical yield*100
FeTiO3 + H2SO4 -> TiO2 + FeSO4 + H2O
Molar mass of FeTiO3 = 152 g / mole
Number of mole of FeTiO3 = Mass / molar mass
= 8.65 x 10³ / 152
= 56907 g / mole
By solving the equation
Number of moles of TiO2 = 56907 g / mole
Mass of TiO2 = molar mass x number of moles
= 80 x 56907
= 4552560 = 4.55 x 10³
Percent yield = 3.47 x 10³ / 4.55 x 10³ x 100
= 0.763 x 100
= 76.3 %
Thus, Titanium(IV) oxide (TiO2) is a white substance produced by the action of sulfuric acid on the mineral ilmenite. The percent yield of the reaction is 76.3%.
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Draw a chiral alcohol with the formula C4H10O.
t-Butyl alcohol (t-BuOH) is a tertiary aliphatic alcohol used as a solvent or alcohol denaturant and as a fragrance carrier in cosmetics. t-butyl alcohol is one of the chiral forms of alcohol.
t-BuOH was reported as an ingredient in 32 eye makeup, fragrance, and shaving formulations at concentrations between 0.00001% and 0.3%. Common modifiers found in cosmetics and personal care products include:
Denatonium benzoate, t-butyl alcohol, diethyl phthalate, methyl alcohol. The alcohol denaturation process does not chemically change the ethanol molecule. Acute exposure:
Acute exposure to tert-butyl alcohol can cause eye irritation and redness, runny nose, sore throat, headache, nausea, fatigue, dizziness, and red and dry skin. The formula of this chiral alcohol is C4H10O.
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Calculate the number of H atoms in 0.532 mol C4H10. Na = 6.022 x 1023.
O 8.83 x 10-24 H atoms
O 3.20 x 1023 H atoms
O 8.83 x 10-25 H atoms
O 1.13 x 1024 H atoms
O 3.20 x 1024 Hatoms
3.20 x 1024 H atoms, which were produced after the Big Big 13.7 billion years ago, are contained in 0.532 mol of C4H10, the smallest known unit of mass.
How are atoms made?Atomic structure: composition The atom is made up of a small nucleus that is encircled by circling electrons. Protons, which are found in the nucleus and have positive charges comparable to the atom negative charges, are present. Neutrons, which are almost the same size but lack a charge, might also be found in the nucleus.
What are the 3 different types of atoms?Protons, electrons, and neutrons are the 3 main types of particles found in atoms. In contrast, the mass of the electron is extremely little compared to that of neutrons and protons. A neutron has had no charge, a proton has a positive charge, and an electron has a negative charge.
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Round off to 3 sig figs-1638
1,640. The number is rounded up because the digit in the tenths place is 8, which is greater than or equal to 5.
What is rounded off?Rounding off is a mathematical process of replacing a number with an approximate value that has a shorter, simpler, or more explicit representation. It is often done to reduce the number of significant figures in a calculation or to make calculations easier. Rounding off is used in many everyday situations, such as calculating a restaurant bill or estimating the amount of paint needed to paint a room. It is also used in more complex calculations, such as in scientific and engineering calculations.
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How many molecules are there in 295 grams of ammonia?
Answer:
295 g of ammonia = (17.32 mol x 6.022 x 10^23 molecules/mol) = 1.04 x 10^25 molecules.
Explanation:
hope this helps
How many atoms are in 0.540 moles of sodium?
Answer:
3.24108 Raised to 23 I'm pretty sure