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kirza4 [7]
3 years ago
14

What is the mass, in grams, of 1.33 mol of water, H2O? Express the mass in grams to three significant figures.

Chemistry
2 answers:
Yakvenalex [24]3 years ago
5 0

Explanation:

<u>First find the mass of 1 mole of water (Molecular mass)</u>

H_{2} O = 2H + O

= 2(1) + 32

= 34 \: grams

Hence 1 mole of water is 34 g

<u>C</u><u>o</u><u>m</u><u>p</u><u>a</u><u>r</u><u>e</u>

1 mole = 34 g

1.33 mole = x g

\frac{x}{34} = \frac{1.33}{1}

x = 1.33 \times 34

\color{blue}{\boxed{x = 45.2}} \: \: \: \: to \: 3 \: s.f.

Therefore 1.33 moles of water is 45.2 grams

puteri [66]3 years ago
4 0

Answer:

I need point

Explanation:

I need point

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Answer:

I think it's A

Explanation:

Carbon dioxide is added to the atmosphere whenever people burn fossil fuels. ... As the amount of carbon dioxide in the atmosphere rises, the oceans absorb a lot of it. In the ocean, carbon dioxide reacts with seawater to form carbonic acid. This causes the acidity of seawater to increase.

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2 years ago
Which chemical equation demonstrates the law of conservation of mass!
zlopas [31]

Answer:

F. 2NO + 02 —> 2NO

H. 4NH3 + 502 —> 4NO + 6H20

Explanation:

The law of conservation of mass states that matter can neither be created nor destroyed during a chemical reaction but can be convert from one form to another.

2NO + 02 —> 2NO

From the above, the total number of N on the left balance the total number on the right i.e 2 atoms of N on both side of the equation.

The total number of O on the left balance the total number on the right i.e 2 atoms of O on both side of the equation. This is certified by the law of conservation of mass.

4NH3 + 502 —> 4NO + 6H20

From the above, the total number of N on the left balance the total number on the right i.e 4 atoms of N on both side of the equation.

The total number of O on the left balance the total number on the right i.e 10 atoms of O on both side of the equation.

The total number of H on the left balance the total number on the right i.e 12 atoms of O on both side of the equation.

This is certified by the law of conservation of mass.

The rest equation did not conform to the law of conservation of mass as the atoms on the left side did not balance those on the right side

5 0
3 years ago
Define the term macromolecule
makkiz [27]

Explanation:

a molecule containing a very large number of atoms, such as a protein, nucleic acid, or synthetic polymer.

4 0
2 years ago
How many moles of hydrogen molecules (h2) would be required to produce two moles of hydrogen peroxide (h2o2)?
SashulF [63]
Their should be two molecules of hydrogen (h2) to produce 2 moles of h2O2
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3 years ago
How much heat is required to change the temperature of a 15 g aluminum can with 100 g of water from 24.5°C to 55°C?
Assoli18 [71]
Heat capacity of aluminium = 0.900 J/g°C
While heat capacity of water = 4.186 J/g°C
Heat = heat gained by water + heat gained by aluminium 
Heat gained by water = 100 × 4.186 × 30.5 
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Heat gained by aluminium = 15 × 0.9 × 30.5 
                                          = 411.75 Joules
Heat required = 13179.05 Joules or 13.179 kJoules
3 0
3 years ago
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