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bija089 [108]
3 years ago
11

How many moles of H2O are in 12.3L?

Chemistry
1 answer:
11111nata11111 [884]3 years ago
4 0
You take 12.3L + avogadro's number (6.022409x10^23
=7.407233x10 ^24 mols 
I know it's a long number but you can have long numbers. I'm pretty sure this right. 

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Which is not a form of potential energy?<br><br> gravitational<br> chemical<br> elastic<br> thermal
Elena L [17]

Answer:Thermal Energy is not a form of potential energy

Explanation:

4 0
3 years ago
Consider an acidic chromate-dichromate system at equilibrium in which the color is an orange-yellow. The reaction is represented
goldenfox [79]

Answer:

The equilibrium will move in forward direction.

Explanation:

Any change in the equilibrium is studied on the basis of Le-Chatelier's principle.

This principle states that if there is any change in the variables of the reaction, the equilibrium will shift in the direction to minimize the effect.

Cr_2O_7^{2-}(aq)+H_2O(l)\rightleftharpoons 2CrO_4^{+}(aq)+2H^+(aq)

On addition of base at the equilibrium, the hydroxide ions of the base will neutralize the hydrogen ions and lowering in concentration of hydrogen ion will be observed.

So, on lowering of concentration of hydrogen ions the equilibrium will move in direction in accordance to Le Chatelier’s Principle .The equilibrium will move in forward direction.

4 0
3 years ago
Can someone help me with Q4 MCQ? I would like to have an explanation pls. Thanks, will mark brainliest.
lilavasa [31]

Answer:

B

Explanation:

The ratios of the coefficient of the compounds in a balanced chemical equation tells us the relationship of each compound to the others in terms of mole.

Based on the equation,

3 moles of CO₂ would require 2 moles of phosphoric acid.

3 mol CO₂ ------- 2 mol H₃PO₄

1.5 mol CO₂ ------- 2 ÷2= 1 mol H₃PO₄

Or 1.5 mol would require \frac{1.5}{3}  \times 2 mol of  H₃PO₄

To find mass of  H₃PO₄, multiply the number of moles by its Mr, which can be deduced with the help of the periodic table.

Ar of  H₃PO₄

= 3(Ar of H) + Ar of P +4(Ar of O)

= 3(1) +31 +4(16)

= 98

Multiply 98 with the number of moles, 1, to obtain the answer.

So if you would look at the steps above, here's what we did:

\frac{1.5 \times 2}{3}  \times 98 \\  =  \frac{1.5 \times 2 \times 98}{3}

8 0
3 years ago
Aqueous hydrochloric acid will react with solid sodium hydroxide to produce aqueous sodium chloride and liquid water . Suppose 3
Schach [20]

Answer:

No mass of HCl could be left over by the chemical reaction because is the limting reactant and it is all consumed.

Explanation:

Our reactants are: HCl and NaOH

Products are: NaCl and H₂O

This is a neutralization reaction that can also be called an acid base reaction, an acid and a base react to produce water and a neutral salt, in this case where we have strong acid and base.

Ratio is 1:1. We convert mass to moles:

35 g . 1 mol / 36.45 g = 0.960 moles of HCl

73 g . 1 mol / 40 g = 1.82 moles of NaOH

As ratio is 1:1, for 0.960 moles of HCl we need 0.960 moles of NaOH and for 1.82 moles of NaOH, we need 1.82 moles of acid.

As we only have 0.960 moles of HCl and we need 1.82 moles, no acid remains after the reaction goes complete. HCl is the limiting reactant, so the acid, it is all consumed.

6 0
3 years ago
What volume of product is produced when 20.0 Mg of liquid hydrogen reacts with excess liquid oxygen in a rocket propellant react
Zinaida [17]
Good luck g hope you get it right
4 0
3 years ago
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