I need help on #2 a and b. please explain steps and answer

In the explosion of a hydrogen-filled balloon, 0.40 g of hydrogen reacted with 3.2 g of oxygen. How many grams of water vapor ar

REY [17]

Answer:

3.568 g of H₂O

Solution:

The Balance Chemical Equation is as follow,

2 H₂ + O₂ → 2 H₂O

Step 1: Calculate the Limiting Reagent,

According to Balance equation,

4.04 g (2 mol) H₂ reacts with = 32 g (1 mol) of O₂

So,

0.40 g of H₂ will react with = X g of O₂

Solving for X,

X = (0.40 g × 32 g) ÷ 4.04 g

X = 3.17 g of O₂

It means 0.4 g of H₂ requires 3.17 g of O₂, while we are provided with 3.2 g of O₂ which is in excess. Therefore, H₂ is the limiting reagent and will control the yield of products.

Step 2: Calculate amount of Water produced,

According to equation,

4.04 g (2 mol) of H₂ produces = 36.04 g (2 mol) of H₂O

So,

0.40 g of H₂ will produce = X moles of H₂O

Solving for X,

X = (0.40 g × 36.04 mol) ÷ 4.04 g

X = 3.568 g of H₂O

5 0

4 years ago

Which adaptation helps a tapeworm attach itself to the intestines of its host?

lubasha [3.4K]

Answer:

B) hooks and suck- ers

Explanation:

4 0

3 years ago

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What can you infer about the volume of an object imagined with a greater mass?

pashok25 [27]

We tend to think the greater the mass, the greater the volume but that is not true. What weighs more a pound of lead or a pound of feathers? Obviously they are the same however there would be a lot more feathers than lead. Mass and volume are not really related.

3 0

4 years ago

Hydrogen bonds form between molecules containing _________ bonds; the hydrogen bond is between a hydrogen atom of one molecule a

nasty-shy [4]

Answer:

The answer is A. Polar covalent; negatively

Explanation:

Hydrogen bonds form between molecules containing polar covalent bond the hydrogen bond is been a hydrogen atom of one molecule and a partially negative charged atom of another.

Example $H_{2}O$ (water):- It contain a slight positive charge on one side and a slight negative charge on the other.

5 0

3 years ago

How many grams of h2 will be produced if 175g of HCI are allowed to react completely with sodium

Sedbober [7]

Answer:

4.8 grams of H₂ will be produced if 175g of HCI are allowed to react completely with sodium

Explanation:

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction) you can see that the following amounts in moles of each compound react and are produced:

HCl: 2 moles
Na: 1 mole
NaCl: 2 moles
H₂: 1 mole

You know the following masses of each element:

H: 1 g/mole
Cl: 35.45 g/mole
Na: 23 g/mole

So, the molar mass of each compound participating in the reaction is:

HCl: 1 g/mole + 35.45 g/mole= 36.45 g/mole
Na: 23 g/mole
NaCl: 23 g/mole + 35.45 g/mole= 58.45 g/mole
H₂: 2* 1 g/mole= 2 g/mole

Then, by stoichiometry of the reaction, the following amounts in grams of each of the compounds participating in the reaction react and are produced:

HCl: 2 moles* 36.45 g/mole= 72.9 g
Na: 1 mole* 23 g/mole= 23 g
NaCl: 2 moles* 58.45 g/mole= 116.9 g
H₂: 1 mole* 2 g/mole= 2 g

So, a rule of three applies as follows: if by stoichiometry, when reacting 72.9 grams of HCl 2 grams of H₂ are formed, when reacting 175 grams of HCl how much mass of H₂ will be formed?

$mass of H_{2} =\frac{175 g of HCl*2g ofH_{2} }{72.9 g of HCl}$

mass of H₂= 4.8 g

<u><em>4.8 grams of H₂ will be produced if 175g of HCI are allowed to react completely with sodium</em></u>

3 0

3 years ago

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