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larisa86 [58]
3 years ago
13

Please help me I need these answers

Chemistry
1 answer:
iren2701 [21]3 years ago
6 0

Answer:

1. False

2. A

3.true

Explanation:

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How many moles of water are in 1/4 cup of water
il63 [147K]

Answer:

3.4752 moles of water

Explanation:

There are 13.84 mole in one cup of water so,

13.84 divided by 4= 3.4725 :)

5 0
2 years ago
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A sample of oxide iron weighing 2.40g was heated in a stream of hydrogen until it was completely converted to the metal. If the
wlad13 [49]

Answer:

Fe₂O₃

Explanation:

To solve this question we must find the moles of Iron in 1.68g. With the difference of the masses we can find the moles of oxygen. The formula will be obtained with the ratio of both amount of moles:

<em>Moles Fe:</em>

1.68g * (1mol / 56g)  =0.03moles

<em>Moles O:</em>

2.40g-1.68g = 0.72g * (1mol/16g) = 0.045moles

The ratio O/Fe is:

0.045moles / 0.03moles = 1.5 moles. this ratio is obtained if the formula is:

<h3>Fe₂O₃</h3>
4 0
3 years ago
If you have 2 solutions: one equal to 9mol/L and another with 6 mol/L,
tamaranim1 [39]

Answer:

Explanation:

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7 0
2 years ago
How many grams of Cl are in a 38.0-g sample of the chlorofluorocarbon CF2Cl2
Katena32 [7]
The molecular formula of chlorofluorocarbon is CF₂Cl₂ 
Molecular mass of CF₂Cl₂ is 120.9 g/mol
Mass of Cl in 1 mol - 2 x 35.5 = 71 g/mol
in 120.9 g of compound - 71 g of Cl
Therefore in 38 g of sample - 71/120.9 x 38 g of Cl
Mass of Cl in 38 g - 22.31 g of Cl
4 0
3 years ago
List the six types of energy and provide an example of each.
givi [52]

Answer:

This is very confusing

Explanation:

lol

6 0
3 years ago
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