Answer:
19.8% of Nitrogen
Explanation:
In the Al(NO₃)₃ there are:
1 atom of Al
3 atoms of N
And 9 atoms of O
The molar mass of Al(NO₃)₃ is:
1 Al * (26.98g/mol) = 26.98g/mol
3 N * (14g/mol) = 42g/mol
9 O * (16g/mol) = 144g/mol
26.98 + 42 + 144 = 212.98g/mol
We can do a conversion using these molar masses to find the mass of nitrogen is the sample, that is:
2.57g * (42g/mol / 212.98g/mol) =
0.51g N
Percent composition of nitrogen is:
0.51g N / 2.57g * 100
= 19.8% of Nitrogen
In the levels of organization of plants, What are the 2 tissues and their functions?
write the balanced equation for the formation of carbon dioxide.
anyone know how to do this?
Answer:
3.26×10⁵ L
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 3.5×10⁵ L
Initial temperature (T₁) = 27 °C
Initial pressure (P₁) = 101 KPa
Final temperature (T₂) = –10 °C
Final pressure (P₂) = 95 KPa
Final volume (V₂) =?
Next, we shall convert celsius temperature to Kelvin temperature. This can be obtained as follow:
T(K) = T(ºC) + 273
Initial temperature (T₁) = 27 °C
Initial temperature (T₁) = 27 °C + 273
Initial temperature (T₁) = 300 K
Final temperature (T₂) = –10 °C
Final temperature (T₂) = –10 °C + 273
Final temperature (T₂) = 263 K
Finally, we shall determine the new volume of the tank. This can be obtained as follow:
Initial volume (V₁) = 3.5×10⁵ L
Initial temperature (T₁) = 300 K
Initial pressure (P₁) = 101 KPa
Final temperature (T₂) = 263 K
Final pressure (P₂) = 95 KPa
Final volume (V₂) =?
P₁V₁ / T₁ = P₂V₂ / T₂
101 × 3.5×10⁵ / 300 = 95 × V₂ / 263
117833.333 = 95 × V₂ / 263
Cross multiply
95 × V₂ = 117833.333 × 263
95 × V₂ = 30990166.6
Divide both side by 95
V₂ = 30990166.6 / 95
V₂ = 3.26×10⁵ L
Thus, the new volume of the tank is 3.26×10⁵ L
how many energy levels does a sodium atom have?
the element sodium has 1,000,000 million energy levels. in an electrically neutral sodium atom- there are 3 energy levels.
Answer:
Sodium has 11 electrons. The first two fill the innermost energy level. The second energy level is also full, holding eight electrons and one electron remaining in the outer energy level. It is the number of outer electrons that give an element its chemical properties.
Explanation:
stoichiometry:
You conduct the following precipitation reaction in a lab:
CoCl₂ + 2NaOH → 2NaCl + Co(OH)₂
If you react 10.0 mL of 1.5 M CoCl₂ with plenty of NaOH, how many grams of Co(OH)₂ will precipitate out?
1.4 g Co(OH)₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Unit 0
Base 10 decimal systemAtomic Structure
Reading a Periodic TableMolarity = moles of solute / liters of solutionAqueous Solutions
States of MatterPrediction Reactions RxNStoichiometry
Using Dimensional AnalysisAnalyzing Reactions RxNExplanation:Step 1: Define
[RxN - Balanced] CoCl₂ + 2NaOH → 2NaCl + Co(OH)₂
[Given] 10.0 mL, 1.5 M CoCl₂
[Solve] grams Co(OH)₂
Step 2: Identify Conversions
[Base 10] 1000 mL = 1 L
[RxN] 1 mol CoCl₂ → 1 mol Co(OH)₂
[PT] Molar Mass of Co - 58.93 g/mol
[PT] Molar Mass of O - 16.00 g/mol
[PT] Molar Mass of H - 1.01 g/mol
Molar Mass of Co(OH)₂ - 58.93 + 2(16.00) + 2(1.01) = 92.95 g/mol
Step 3: Stoich
[DA] Convert mL to L [Set up]: [tex]\displaystyle 10.0 mL(\frac{1 \ L}{1000 \ mL})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 0.01 \ L[/tex][DA] Find moles of CoCl₂ [Molarity]: [tex]\displaystyle 1.5 \ M \ CoCl_2 = \frac{x \ mol \ CoCl_2}{0.01 \ L}[/tex][DA] Solve for x [Multiplication Property of Equality]: [tex]\displaystyle 0.015 \ mol \ CoCl_2[/tex][DA] Set up [Reaction Stoich]: [tex]\displaystyle 0.015 \ mol \ CoCl_2(\frac{1 \ mol \ Co(OH)_2}{1 \ mol \ CoCl_2})(\frac{92.95 \ g \ Co(OH)_2}{1 \ mol \ Co(OH)_2})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 1.39425 \ g \ Co(OH)_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs as our lowest.
1.39425 g Co(OH)₂ ≈ 1.4 g Co(OH)₂
Answer:
1.4 g Co(OH)₂
Explanation:
Molar mass of Co(OH)₂ = (58.9 + 16.0×2 + 1.0×2) g/mol = 92.9 g/mol
According to the given equation, mole ratio CoCl₂ : Co(OH)₂ = 1 : 1
No. of moles of CoCl₂ reacted = (1.5 mol/L) × (10.0/1000 mol) = 0.015 mol
No. of moles of Co(OH)₂ precipitated = 0.015 mol
Mass of Co(OH)₂ precipitated = (0.015 mol) × (92.9 g/mol) = 1.39 g / 1.4g
====
OR:
(1.5 mol CoCl₂ / 1000 mL CoCl₂ solution) × (10.0 mL CoCl₂ solution) × (1 mol Co(OH)₂ / 1 mol CoCl₂) × (92.9 g Co(OH)₂ / 1 mol Co(OH)₂)
= 1.39 g Co(OH)₂ / 1.4 g Co(OH)₂
Does the equation describe a chemical change or a physical change? Explain your reasoning.
C17H17ON3(s) + 2C4H6O3(l) - -> C21H21O5N(s) + 2C2H4O2(l)
Answer:
Chemical change
Explanation:
There are types of changes in nature namely: physical change and chemical change. A physical change is a change that does not alter the chemical composition of the substances involved, hence, no new substances are formed. On the other hand, a chemical change changes the chemical composition of the involved substances to form new substances.
Based on the definition of the types of changes below, the equation depicted in this question is a CHEMICAL CHANGE because it involves a rearrangement of the atoms of each element in the reactants to produce new sets of products with a new chemical formula.
C17H17ON3(s) + 2C4H6O3(l) → C21H21O5N(s) + 2C2H4O2(l)
Which is the balanced chemical equation showing hydrogen peroxide (H2O2) decomposing into hydrogen (H2) and oxygen (O2)? Multiple Choice H2O2 → H2 + O2 H2 + O2 → H2O2 2 H2 + O2 → 2 H2O2 2 H2O2 → 2 H2 + O2 PrevQuestion 13 of 14 Total13 of 14Visit question mapNext
Answer: [tex]H_2O_2\rightarrow H_2+O_2[/tex]
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
The balanced chemical equation for showing hydrogen peroxide decomposing into hydrogen and oxygen is:
[tex]H_2O_2\rightarrow H_2+O_2[/tex]
what is 10x20=???????????? I NEEED HELP
Answer:
The answer for 10 times 20 is 200
Explanation:
Why... Because what is 1 times 2=2 so add the left over zero I'm that your answer!
How many atoms are in 5.62 moles of Mercury?
Answer:
3.384364 time 10^24 atoms
Explanation:
multiply by avogadro's number
which of these is an example of a chemical change?
Answer:
No answer choices but Chemical changes are changes in which can't be undone an example would be a rotting food(won't be fresh ever again) or burning paper(ashes are ashes not paper)
Explanation:
Hope this helps :D
Can anyone help w/ this chem problem plz
Answer:
26
Explanation:
Rate of diffusion of hydrogen, compared with the gases of air?
Explain your answer using the term mass
Answer:
Graham's law states that the rate of effusion or of diffusion of a gas is inversely proportional to the square root of its molecular weight. So, rate of diffusion of hydrogen gas is four times faster than oxygen gas.
Explanation:
Answer:
Rate of diffusion of hydrogen is higher than other gases because mass of hydrogen is very small and it diffuses easily.
Explanation:
The number of protons and neutrons an element has?
Answer:
atomic mass
Explanation:
protons and neutrons have mass; electrons do not (or at the very least have negligible mass by comparison)
Can you identify a chemical only by knowing its physical properties?
Answer:
Any characteristic that can be determined without changing the substance's chemical identity. chemical property: Any characteristic that can be determined only by changing a substance's molecular structure
Explanation:
Wine goes bad soon after opening because the ethanol ch3ch2oh in it reacts with oxygen gas o2 from the air to form water h2o and acetic acid ch3cooh , the main ingredient of vinegar. Calculate the moles of ethanol needed to produce 0.055mol of acetic acid. Be sure your answer has a unit symbol, if necessary, and round it to the correct number of significant digits.
Answer:
For producing 0.55 mole of acetic acid, 0.55 mole of ethanol is required.
Explanation:
The balanced equation for this reaction is
CH3CH2OH + O2 --> CH3COOH + H2O
As we can see in this equation, the ration of number of moles of acetic acid to the number of moles of ethanal is equal to [tex]1 : 1[/tex]
Hence, in order to produce one mole of acetic acid, 1 mole of ethanol is required.
Thus, for producing 0.55 mole of acetic acid, 0.55 mole of ethanol is required.
Write 5 household products that have hazard symbol/symbols on them.
Answer:
A variety of household products are hazardous. Motor oil, pesticides, oil-based paints, mothballs, flea collars, weed killers, and some household cleaners
Select all that are compounds.
H2O
CH4
He
O2
NaCl
Answer:
NaCl, H2O
Explanation:
Compounds are substances that contain atoms of two or more different elements.
Select the correct answer.
Which substance is a source of hydrocarbons?
A.
natural gas
B.
protein
C.
silk
D.
starch
E.
water
Answer:
A. Natural Gas is a substance that is a source of hydrocarbons.
Explanation:
Answer:
option A . hope it helps , thanks
Silver nitrate and sodium phosphate are reacted in equal amounts of 200 g each. How many grams of silver phosphate are produced?
Answer:
The answer is "164.2726 g "
Explanation:
Equation:
The molar weight of
The mol in
The molar weight of
The moles in
The ratio in the equation is 3:1 so, limits reaction the ratio is 3:1 therefore, 0.392456 mol of were reacted
The molar mass of the
[tex]mass= mol \times Molar \ Weight[/tex]
[tex]= 418.576 \times 0.392456 \\\\= 164.2726 \ g \ of \ Ag_3PO_4[/tex]
Based on the equation below, how many moles of aluminum sulfate (Al2(SO4)3) will be produced from the reaction of 5.8 moles of aluminum hydroxide (Al(OH)3) and excess sulfuric acid (H2SO4)? 2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O
Answer:
2.9 moles of aluminum sulfate will be produced from the reaction of 5.8 moles of aluminum hydroxide and excess sulfuric acid.
Explanation:
The balanced reaction is:
2 Al(OH)₃ + 3 H₂SO₄ → Al₂(SO₄)₃ + 6 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
Al(OH)₃: 2 moles H₂SO₄: 3 moles Al₂(SO₄)₃: 1 mole H₂O: 6 molesThen you can apply the following rule of three: if by reaction stoichiometry 2 moles of Al(OH)₃ produce 1 mole of Al₂(SO₄)₃, then 5.8 moles of Al(OH)₃ how many moles of Al₂(SO₄)₃ will they produce?
[tex]moles of Al_{2} (SO_{4} )_{3} =\frac{5.8moles of Al(OH)_{3} *1 mole of Al_{2} (SO_{4} )_{3}}{2moles of Al(OH)_{3}}[/tex]
moles of Al₂(SO₄)₃= 2.9
2.9 moles of aluminum sulfate will be produced from the reaction of 5.8 moles of aluminum hydroxide and excess sulfuric acid.
Answer:
67
Explanation:
because that right
predict the effect of change in temperature and pressure of the dissociation of PCL5
Answer:
Ps5
Explanation:
Answer:
well the answer to that is climate change
Explanation:
because with climate change the temperature and hot and cold it is depending on where you live
write the condensed, complete, and net ionic equations for any reaction that occurs between K2CrO4(aq) and Fe(NO3)3(aq).
Answer:
Condensed equation: [tex]3K_2CrO_4(aq)+2Fe(NO_3)_3(aq)\rightarrow Fe_2(CrO_4)_3(s)+6KNO_3(aq)[/tex]
Complete ionic equation : [tex]6K^+(aq)+3CrO_4^-(aq)+2Fe^{2+}(aq)+6NO_3^-(aq)\rightarrow Fe_2(CrO_4)_3(s)+6K^+(aq)+6NO_3^-(aq)[/tex]
Net ionic equation : [tex]3CrO_4^-(aq)+2Fe^{2+}(aq)\rightarrow Fe_2(CrO_4)_3(s)[/tex]
Explanation:
A double displacement reaction is one in which exchange of ions take place. The salts which are soluble in water are designated by symbol (aq) and those which are insoluble in water and remain in solid form are represented by (s) after their chemical formulas.
The balanced chemical equation is:
[tex]3K_2CrO_4(aq)+2Fe(NO_3)_3(aq)\rightarrow Fe_2(CrO_4)_3(s)+6KNO_3(aq)[/tex]
Condensed equation : [tex]3K_2CrO_4(aq)+2Fe(NO_3)_3(aq)\rightarrow Fe_2(CrO_4)_3(s)+6KNO_3(aq)[/tex]
Complete ionic equation : In complete ionic equation, all the substance that are strong electrolyte and present in an aqueous are represented in the form of ions.
[tex]6K^+(aq)+3CrO_4^-(aq)+2Fe^{2+}(aq)+6NO_3^-(aq)\rightarrow Fe_2(CrO_4)_3(s)+6K^+(aq)+6NO_3^-(aq)[/tex]
Net ionic equation : In the net ionic equations, we are not include the spectator ions in the equations. Spectator ions are the ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.
[tex]3CrO_4^-(aq)+2Fe^{2+}(aq)\rightarrow Fe_2(CrO_4)_3(s)[/tex]
Which color of white light bends the least when it is refracted by a prism?
blue
yellow
green
violet
Answer:
Its yellow
Explanation:
When i took the unit practice test it said the correct answer was yellow sooooo
The component of white light that bends the least under refraction by a glass prism is red.
Components of white lightsWhite lights usually have 7 components which include red, orange, yellow, green, blue, and violet.
When light rays pass from one medium to another, is bends due to a difference in the density of the media. This is called refraction.
The components of white light bend when they pass through a glass prism. The extent of bending of each component is dependent on the wavelength of each color.
Red light has the longest wavelength and is thus refracted the least while violet with the shortest wavelength is refracted the most.
More on refraction can be found here:https://brainly.com/question/14760207
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PLEASE HELP!! CHEMICAL EQUATIONS
For each of the following problems, write complete chemical equations to describe the chemical process taking place. Balance the equations and write the state of matter.
2) Magnesium reacts with sodium fluoride to produce magnesium fluoride and elemental sodium.
Answer:
Mg(s) + 2NaF (aq) —> MgF₂ (aq) + 2Na(s)
Explanation:
Magnesium => Mg
Sodium fluoride => NaF
Magnesium fluoride => MgF₂
Sodium metal => Na
The equation can be written as:
Mg + NaF —> MgF₂ + Na
Thus, the above equation can be balance as illustrated below:
Mg + NaF —> MgF₂ + Na
There are 2 atoms of F on the right side and 1 atom on the left side. It can be balance by writing 2 before NaF as shown below:
Mg + 2NaF —> MgF₂ + Na
There are 2 atoms of Na on the left side and 1 atom on the right side. It can be balance by writing 2 before Na as shown below:
Mg + 2NaF —> MgF₂ + 2Na
Mg(s) + 2NaF (aq) —> MgF₂ (aq) + 2Na(s)
Now, the equation is balanced.
Why is water said to be universal solvent?
A.it dissolves some substances.
B.It dissolves almost all substances
C.It is dissolved by some substances.
D.It is dissolved by almost all substances.
Answer:
B
Explanation:
And, water is called the "universal solvent" because it dissolves more substances than any other liquid. This allows the water molecule to become attracted to many other different types of molecules.
Answer:
I believe it's B
Explanation:
Water can dissolve with any that's why it's universal and can dissolve substancrs more than any other Liquid.
please give me brainliest!
hope this helps
write and balance the cellular respiration equation of glucose compared with the photosynthesis reaction in the terms of reactants products energy flow in the significance of each.
Answer:
Explanation:
.
If a little old lady is doing 98.3 kilometers/hour, will she get a speeding ticket if the speed limit is 55 miles / hour? [USE: 5280 feet = 1 mile and 2.54 cm = 1.00 inch] (Show how to convert to miles / hour, even if your calculator does it for you.)
Answer:
It is possible she could get one.
Explanation:
To solve this problem we need to convert 98.3 kilometers/hour to miles/hour.
In other words, we convert km to mi, to do so we multiply 98.3 km by a conversion factor, putting the unit we want to have in the numerator, and the unit we want to convert in the denominator:
98.3 km * [tex]\frac{1000m}{1km} *\frac{100cm}{1m}*\frac{1in}{2.54cm} *\frac{1ft}{12in} *\frac{1mi}{5280ft}[/tex] = 61 miGiven that the little old lady is doing 61 miles/hour, she could get a speeding ticket.
For a gravitational field to be generated between two objects, what must be true?
No other forces can be presents
The two objects must be in contact
One object must be pure iron
Both objects must have mass
Answer:
i think its both objects have to have mass
Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Therefore, the correct option is option D.
What is matter?Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.
Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.
So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. For a gravitational field to be generated between two objects, Both objects must have mass.
Therefore, the correct option is option D.
To learn more about matter, here:
https://brainly.com/question/4562319
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23. What is the molarity of NO3- in each solution?
a. 0.150 M KNO3
b. 0.150 M Ca(NO3)2
c. 0.150 M Al(NO3)3
Answer:
Explanation:
A) 0.150
B) 0.300
C) 0.450
hope it helps:)
Which of the following is a natural source of CO2 in the atmosphere?
oil spilled into tropical ocean waters
emissions produced by burning fossil fuels
gases released when plants make food
warm water released from nuclear power plants