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Ivenika [448]
3 years ago
15

What will you expect from an endothermic reaction

Chemistry
1 answer:
Lera25 [3.4K]3 years ago
3 0
An endothermic reaction is when the energy is absorbed, while an exothermic reaction releases energy.
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Theoretically how many moles of carbonic acid will be produced by the 3.00 g sample of NaHCO3
yaroslaw [1]
NaHCO3 = 22.99 + 1.008 + 16(3) = 83.99 g/mol 
<span>Na = 22.99g/83.99 g weight of molecule =.2727 or 27.27% </span>
<span>3.0 g* .2727 = 0.8211 grams of sodium in sample of NaHCO3 

</span><span>0.8211 grams Na + 1.266 grams Cl = 2.087 grams</span>
4 0
3 years ago
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Do you know any of these?
bulgar [2K]
The second one is no
6 0
3 years ago
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Water has a density of 1g/ml. what is the mass of the water if it fills a 10ml container?
notka56 [123]
It's 10.
Mass = density x volume
M = 1g/ml(10ml) = 10g
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3 years ago
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Sodium peroxide (Na2O2) is often used in self-contained breathing devices, such as those used in fire emergencies, because it re
Anastaziya [24]

Answer:

725.15 L

Explanation:

The balanced chemical equation for the reaction between Na₂O₂ and CO₂ is the following:

Na₂O₂ + CO₂ → Na₂CO₃ + 1/2 O₂

From the stoichiometry of the reaction, 1 mol of Na₂O₂ reacts with 1 mol CO₂. So, the stoichiometric ratio is 1 mol Na₂O₂/1 CO₂.

Now, we convert the mass of reactants to moles by using the molecular weight (Mw) of each compound:

Mw (Na₂O₂) = (23 g/mol x 2) + (16 g/mol x 2) = 78 g/mol

moles Na₂O₂ = 96.7 g/(78 g/mol) = 1.24 mol Na₂O₂

Mw (CO₂) = 12 g/mol + (16 g/mol x 2) = 44 g/mol

moles CO₂ = 0.0755 g/(44 g/mol) = 1.71 x 10⁻³ mol CO₂

Now, we calculate the number of moles of CO₂ we need to completely react with the mass of Na₂O₂ we have:

1.24 mol Na₂O₂ x 1 mol CO₂/1 mol Na₂O₂ = 1.24 mol CO₂

In 1 L of respired air we have 1.71 x 10⁻³ mol CO₂ (0.0755 g), so we need the following number of liters to have 1.24 mol of CO₂:

1.24 mol CO₂ x 1 L/1.71 x 10⁻³ mol CO₂ = 725.15 L

4 0
3 years ago
Write the name and formula of the compound made of magnesium and fluorine
Alexxx [7]

Answer:

Name : Magnesium Fluoride

Formula : MgF2

Explanation:

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8 0
3 years ago
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