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Bogdan [553]
3 years ago
10

How many moles of magnesium oxide are there in 2.50* 10^25 formula units of MgO?

Chemistry
1 answer:
ICE Princess25 [194]3 years ago
6 0
Just divide 2.50*10^25 by 6.02×10^23 to get to moles
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Can you help me balance these chemistry equations?<br> I need to be done by 8pm and it's 7:17pm
Ivanshal [37]

Yes, It is correct.

7 0
3 years ago
Write the charge balance for an aqueous solution of arsenic acid, H3AsO4, in which the acid can dissociate to H2AsO24 , HAsO24 2
lilavasa [31]

Answer:

Kindly check the explanation section.

Explanation:

When the Arsenic acid,H3AsO4 is put in water it dissociates to form or give out 1 proton, 2 protons or 3 protons that is 1H^+, 2H^+ and 3H^+. Check the equation showing the dissociation reactions as given below;

H3AsO4 ===========> H^+ + AsO4^-

H3AsO4 ===========> 2H^+ + AsO4^2-

H3AsO4 ===========> 3H^+ + AsO4^3-

Therefore, the total charge balance is given as:

[H^+] =[OH^-] + [ AsO4^-] + 2[ AsO4^2-] + 3[ AsO4^3-].

Kindly note that the [OH^-] is from water.

8 0
3 years ago
Which of the following statements describe a system at equilibrium? There may be multiple correct answers. Select all that apply
ch4aika [34]

Answer:

The rate of the forward reaction and the rate of the reverse reaction are equal

The concentrations of the reactants and products no longer change.

Explanation:

The equilibrium state is a state of rest or motion of chemical system.

These are some of the condition for dynamic equilibrium of a system:

the systems must be involved in reversible chemical reactions.

the rate of forward reaction is equal to that of the reverse process.

the system offers no resistance to any change in any of the factors.

there is no change in concentration of each of the species in equilibrium with respect to time.

We can see that a system in equilibrium clearly identifies with the chosen options.

6 0
3 years ago
A fraction is written in simplest form when the GCF of the numerator and denominator is fill in the blank
Pachacha [2.7K]
Is divided by the same number that goes into the number being divided evenly so there are no remainers

example....
2 2 1
__ ÷ __ = __
4 2 2
5 0
3 years ago
Atoms of which element have the most valence electrons?  A. Nitrogen (N)  B. Sodium (Na)  C. Oxygen (O)  D. Calcium (Ca)
evablogger [386]
C.oxygen
It has 6 valence electrons
6 0
3 years ago
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