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Andrei [34K]
3 years ago
9

Need answers for Chemistry asap. Will give brainliest.

Chemistry
2 answers:
solniwko [45]3 years ago
7 0

Answer:

a) 0.4 moles

b) 0.3 moles

N76 [4]3 years ago
3 0

Answer:

Balance chemical equation is

O2(g) + 2H2(g) --> 2H20(g)

a. 0.20 mol 02 --> 0.225mol H20

b. 0.30 mol H2 --> 2.7mol H20

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When heated strongly, copper metal incorporates oxygen to form one of the copper oxides from the last problem. In one experiment
Whitepunk [10]

Answer:

1 mol of copper

Explanation:

The mass of the oxide formed is the total mass less the crucible mass, so it is:

100.52 - 88.00 = 12.52 g

It means that 10.00 g is from copper, and 2.52 g is from oxygen. The molar mass of copper is 63.50 g/mol, and the molar mass of oxygen is 16 g/mol. The number of moles (n) is the mass divided by the molar mass:

n Cu = 10.00/63.50 = 0.158 moles

n O = 2.52/16 = 0.158 moles

So, there is the same number of moles of each element, and the product must be: CuO, which has 1 mol of copper.

8 0
3 years ago
How does a fire extinguisher stop a combustion reaction?
tensa zangetsu [6.8K]

Answer:

In the heat of a fire, it releases a cloud of carbon dioxide that smothers the fire. That is, the gas drives oxygen away from the fire, thus stopping the chemical reaction.

7 0
3 years ago
Read 2 more answers
Which solid will be more soluble in water, the one with the larger lattice energy or the one with the smaller lattice energy? as
grandymaker [24]
Lattice energy is the amount of energy expelled when the solid is disintegrated into ions. For example, the solid is Sodium Chloride. In ionic form, that would consist of sodium and chlorine ions.The solid with a smaller lattice energy would be easily disrupted, hence, when a solvent is incorporated, the solid becomes solvated ions.
7 0
4 years ago
Cola contains phosphoric acid and carbonic acid. Which is the most likely reason that cola also contains a large amount of sugar
Bumek [7]

Answer:

B. to counteract the sourness of the acids

Explanation:

Edge:) Good luck!

8 0
3 years ago
How many moles of NH3 can you make from 0.37 moles of H2
uranmaximum [27]

Answer:

The correct answer is 0.25 moles NH₃

Explanation:

First, we need to know the chemical equation for NH₃ formation from H₂. The balanced chemical reaction involved in NH₃ obtention is the following:

N₂(g) + 3 H₂(g) → 2 NH₃(g)

According to this, 2 moles of NH₃ are formed from 3 moles of H₂. We can write that estequiometrical relation as: 2 moles NH₃/ 3 moles H₂.

From the problem, we have to calculate how many moles of NH₃ are produced from 0.37 moles H₂. So, we can simply multiply the number of moles of H₂ to obtain by the convertion factor:

0.37 moles H₂ x 2 moles NH₃/ 3 moles H₂= 0.246 moles NH₃ ≅ 0.25 moles NH₃

Thus, 0.25 moles of NH₃ will be obtained.

6 0
3 years ago
Read 2 more answers
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