The chemical balanced : A and B
Further explanationGiven
Chemical equation
Required
Balanced equation
Solution
A chemical equation is said to be balanced if the number of atoms in the reactants and the number of atoms in the product are the same
a. CO₂+H₂O⇒H₂CO₃
balanced
b. MgO+ 2HCI ⇒ MgCl₂ + H₂O
balanced
c. CaO + HCI ⇒ CaCl₂ + H₂O
the elements H and Cl are not balanced
d. K + H₂O ⇒ K₂O +H₂
element K is not balanced
difference between proton and electron
a proton is a type of particle with a positive charge and an electron is a particle with a negative charge. neutrons ould be a neutral particle.
What is the mass of an object that has a density of 2,86 g/mL and a volume of
75 mL
Answer:
214.5 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question we have
mass = 75 × 2.86
We have the final answer as
214.5 gHope this helps you
Hadron colliders are able to add protons in an element. When a proton is added to an existing element then;
1.An ion is formed with same number of electrons
2. Another isotope of the element is formed with same number of neutrons
3. A second nucleus is formed with more neutrons
4. Another element is formed with greater atomic number
Answer:
4. Another element is formed with greater atomic number
Explanation:
Ions only have a different amount of electrons and have the same amount of protons and neutrons.
Isotopes only have a difference in neutrons.
However, only a difference in protons will make another element.
Hence, 4 is the answer.
Hope this helped!
if you wanted to look at a cell wall which type of cell would you observe
Answer:
You could observe the cell wall in all kingdoms except for the animals. That would be cells of plants, protists (algae), fungi, bacteria and achaea.
The molar solubility of C a ( O H ) 2 C a ( O H ) 2 was experimentally determined to be 0.019 M. Based on this value, what is the K s p K s p of C a ( O H ) 2 C a ( O H ) 2 ?
Answer:
Ksp = 2.74 x 10⁻⁵
Explanation:
The solubility equilibrium for Ca(OH)₂ is the following:
Ca(OH)₂(s) ⇄ Ca²⁺(aq) + 2 OH⁻(aq)
I 0 0
C + s + 2s
E s 2s
According to the ICE table, the expression for the solubility product constant (Kps) is:
Ksp = [Ca²⁺] x ([OH⁻])² = s x (2s)² = 4s³
Then, we calculate Ksp from the solubility value (s):
s = 0.019 M
⇒ Ksp = 4s³ = 4 x (0.019)³ = 2.74 x 10⁻⁵
The Ksp value of Ca(OH)2 is [tex]2.74 \times 10^-^5[/tex].
What is Ksp value?The Ksp is the solubility product constant.
The solubility equilibrium is
[tex]Ca(OH)_2(s) = Ca^2^+(aq) + 2 OH^-(aq)[/tex]
I 0 0
C s +2s
E s 2s
By the ICE table, the expression for Ksp is
[tex]\rm Ksp = [Ca^2^+] \times ([OH^-])^2 = s \times (2s)^2 = 4s^3[/tex]
Now, calculate the Ksp
s, solubility value is 0.019 M
then, [tex]\rm Ksp = 4s^3= 4 \times (0.019)^3 = 2.74 \times 10^-^5[/tex]
Thus, the Ksp value is [tex]2.74 \times 10^-^5[/tex]
Learn more about Ksp
https://brainly.com/question/27132799
How does energy flow through the reef ecosystem?
Two samples of aluminum foil, 27 grams and 54 grams, are cut out from a roll. Which of the following properties is different for the two
Explanation:
For the two samples, the mass and volume of the foil are different but irrespective of this, the density of the aluminum foil will remain the same.
Density is an intensive property of matter. It does not depend on the amount of matter present within the substance. Density is the mass per unit volume and for every sample of a compound, it has the same amount.Mass depends on the amount of matter present and as given in the description, the sample with a high number has more mass.
Volume is the amount of space a substance occupy.
Answer:
amount of matter
Explanation:
A cone has a diameter of 4 inches and a height of 7 inches. Find the volume
of the cone. Use 3.14 for II.
Volume of a cone: II rh
177.2 in.
29.3 in.3
351.7 in.
87.9 in.
Answer:
V = 29.3 inch³
Explanation:
Given data:
Diameter of cone = 4 inch
Height of cone = 7 inch
Volume of cone = ?
Solution:
Formula:
V = πr²h/3
we calculate the radius from diameter,
r = 4 inch/2 = 2 inch
Volume:
V = 3.14 ×(2 inch)² × 7 inch/3
V = 3.14 × 4 inch² × 7 inch/3
V = 29.3 inch³
The specific heat of iron is 0.46 J/g°C. How many joules will it take to make the temperature of a 150. g bar go up from 25°C to 60.°C?
Answer:
Q = 2.415kj
Explanation:
Q = Mc∆temperature
c = 0.46j/g°c = 0.46kj/kg°c
mass = 150g = 0.15kg
∆temperature = 60 - 25 = 35°c
Q = 0.15 X 0.46 X 35 = 2.415kj
Q = 2.415kj
Which of the following is a homogeneous mixture? a. salt water
b. beef stew
c. sand and water
d. soil
Status
Exam
HF is
an acid
a base
neither an
acid nor a
base
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Is HF a base, acid or non
Answer:
HF is an acid as it losses hydrogen into the sollution on hydrolysis.
Explanation:
Which generally describes granite?
A. Dark colored rock with low silica content
B. Dark colored rock with high silica content
C. Light colored rock with low silica content
D. Light colored rock with high silica content
Answer:
I THINK IT MIGHT BE B
Explanation:
A template of a Venn diagram representing common and differentiating characteristics of covalent and ionic bonds is shown.
Which of the following characteristics can be written only in space B?
a)Occurs in substances that have at least one non-metal
b) Occurs in substances that have a repeating lattice structure
c) Occurs in substances that have discrete molecular structure
d) Occurs in substances that have high melting points
It ISNT occurs in substances that have discrete molecular structure
Explanation:
I took the test and got this wrong
Molecules in the thermosphere are fast moving because
A.
no gravity to slow them down
B.
they have nothing to bump into
C.
they are pulled by the Sun's gravity
D.
of radiation absorption
Answer:
i think a or b
Explanation:
As a river’s slope increases, the power of the river to cause erosion usually decreases. Please select the best answer from the choices provided T F
Answer:
False
Explanation:
It is absolutely false that as the river's slope increases the power of the river to cause erosion usually decreases.
The right statement is vice versa because as the slope of the river increases, the ability of the river to cause erosion increases.
The slope of a river is its gradient. As the slope of a river increases so also is its erosive power. The erosive power of a river depends on gravity. As the river becomes more vertical, then the gravity effect increases. This increases the power the river has for erosion.Answer:
false
Explanation:
just cause its right and i took the test
The atomic number of polassium and
calcium is 19 and 20 respectively and they
belong to the same period.
Who among them would have smaller atomic size
Explanation:
Atomic radius decreases from left to right in a period.
Therefore Calcium would have a smaller atomic size.
What variable represents specific heat in the equation Q = mCAT?
O A. The variable c
O B. The variable T
C. The variable m
O D. The variable Q
Answer:
the variable A represented specific heat capacity
Answer: The Variable T
Explanation:
A jeweler heated a sample of silver from 22.0°C to 46.0°C. The specific heat of silver is
0.235 J/gºC. If the silver absorbed 26.0 J of heat, what is the mass of the silver?
please help me!
The mass of the silver : 4.6 g
Further explanationHeat can be calculated using the formula:
Q = mc∆T
Q = heat, J
m = mass, g
c = specific heat, joules / g ° C
∆T = temperature difference, ° C / K
∆T = temperature difference :
[tex]\tt 46-22=24^oC[/tex]
The specific heat of silver is 0.235 J/gºC
Q = heat = 26 J
The mass :
[tex]\tt mass(m)=\dfrac{Q}{c.\Delta T}\\\\m=\dfrac{26}{0.235\times 24}\\\\m=4.6~g[/tex]
What is the average atomic mass of strontium
The answer is 87.62 u
Answer:
Atomic number: 38
Electrons per shell: 2,8,18,8,2
Symbol: Sr
What is the correct formula for combining Mg2+ and Br1+
Answer: The correct formula is [tex]MgBr_2[/tex]
Explanation:
For formation of a neutral ionic compound, the charges on cation and anion must be balanced. The cation is formed by loss of electrons by metals and anions are formed by gain of electrons by non metals.
Here magnesium is having an oxidation state of +2 called as [tex]Mg^{2+}[/tex] cation and bromine [tex]Br^{-}[/tex] is an anion with oxidation state of -1. Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral [tex]MgBr_2[/tex].
The cations and anions being oppositely charged attract each other through strong coloumbic forces and form an ionic bond.
An element's atomic mass does not Include the mass of Its.
electrons
protons
neutrons
Answer:
The correct option would be 'electrons
Explanation:
Can somebody plz answer both these questions in this question thanks! only 2 sentences is fine :)
WILL MARK BRAINLIEST WHEOEVER ANSWERS FIRST :DDDD
Answer:
Electricity is made at a generating station by huge generators. The current is sent through transformers to increase the voltage to push the power long distances. The electrical charge goes through high-voltage transmission lines that stretch across the country.
Hello! Please help.
Is air an element, compound, or mixture?
Is Hydrochloride Acid an element, compound, or mixture?
Oh if you can could you put the explanation of one of them, thank you!
Answer:
Air is a mixture. Its constituents can be separated. For example: oxygen, nitrogen etc.
Hydrochloric acid is a mixture, being an acidic liquid.
The number of waves that pass a given point in a certain amount of
time is the waves...
Answer:
100
Explanation:
nsvcscjkvschssvds
how many group and periods are there in modern periodic table
Answer:
there is 7 periods and 18 groups
Explanation:
How many grams of sodium is equal to 6.92 x 10 21atoms of sodium?
Answer:
[tex]Amount\ of\ Grams = 0.2644 g[/tex]
Explanation:
Given
Element: Sodium
[tex]Atoms = 6.92 * 10^{21}[/tex]
Required
Determine the amount of grams
We start by solving for the number of moles
[tex]Moles = \frac{Sodium\ Atoms}{Avogadro\ Number}[/tex]
[tex]Avogadro\ Number = 6.022 * 10^{23}[/tex]
So, we have:
[tex]Moles = \frac{6.92 * 10^{21}}{6.022 * 10^{23}}[/tex]
[tex]Moles = \frac{6.92 * 10^{21-23}}{6.022}[/tex]
[tex]Moles = \frac{6.92 * 10^{-2}}{6.022}[/tex]
[tex]Moles = 1.15 * 10^{-2}[/tex] moles
Next, we calculate the amount of grams.
Mass per mol of Sodium = 22.98977g/mol
For [tex]1.15 * 10^{-2}[/tex] moles of sodium
[tex]Amount\ of\ Grams = 1.15 * 10^{-2}\ mol * 22.98977g/mol[/tex]
[tex]Amount\ of\ Grams = 1.15 * 10^{-2} * 22.98977g[/tex]
[tex]Amount\ of\ Grams = 0.264382355 g[/tex]
[tex]Amount\ of\ Grams = 0.2644 g[/tex] (approximated)
Hence, there are 0.2644g of sodium in [tex]6.92 * 10^{21}[/tex] atoms
The temperature of a reaction vessel with liquid reactants is lowered to one-third of the original temperature. What will happen to the rate of the reaction?
A) It will increase because fewer particles will have the required activation energy.
B) It will decrease because fewer particles will have the required activation energy.
C) It will increase because surface area of the particles will increase.
D) It will decrease because surface area of the particles will increase.
Answer:
B) It will decrease because fewer particles will have the required activation energy.
Explanation:
Temperature is one of the important factors that affect the rate of a chemical reaction. An increase in the temperature of a reaction will cause the reactants to gain more kinetic energy and hence, reduce the energy required for reactants collision (start) to occur i.e. activation energy.
Note that, once the activation energy is reduced, the rate of reaction is increased. In this case, the temperature of a reaction vessel with liquid reactants is lowered to one-third (1/3) of the original temperature. Due to a reduction in the reaction's temperature, the rate of reaction will also decrease because fewer particles will have the required activation energy.
Answer:
B. It will decrease because fewer particles will have the required activation energy.
Explanation:
I took the text :)
Please help! This is due in 10 minutes!
Answer:
Nitrogen-15
Explanation:
To use the correct notation, you need to use the mass number. The mass number is the number of protons plus the number of neutrons. Nitrogen has 7 protons. This isotope of nitrogen has 8 neutrons.
The correct notation is nitrogen-15.
How can room things in a house save energy? List at least 5 ways in which you can save heat energy. Explain how each one can save heat energy.
Answer:
brainly
Explanation:
Adjust your day-to-day behaviors.
Replace your light bulbs.
Use smart power strips.
Install a programmable or smart thermostat.
Purchase energy efficient appliances.
Which statement best describes a primary occurrence in an uncontrolled fission reaction.
Incomplete question. Options;
A) Mass is created and energy is released.
B) Mass is created and energy is stored.
C) Mass is converted to energy, which is released.
D) Mass is converted to energy, which is stored.
Answer:
Mass is converted to energy, which is released
Explanation:
Basically, when uncontrolled nuclear fission (splitting) occurs, a radioactive atom (a mass) is split into two smaller nuclei leading to a continuous chain of fission reactions.
In other words, as the fission of the mass of the atom continues to occur, the mass is converted to energy, which is then released and more reactions occur.