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4 years ago

How many miles can you drive, if your car gets 21.3 miles per gallon and you have 12.0 gallons of gas?

Chemistry

1 answer:

Travka [436]4 years ago

6 0

Answer:

255.6

Explanation:

If you have 12 gallons and get 21.3mpg,

-Multiply 21.3 by 12

-you can travel 255.6 miles before running out of gas.

-If you need to estimate, round up to 256 miles.

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How many grams of water (H2O) are there in 2.60 mol of the compound?

ad-work [718]

Answer:

46.839728 grams of water

Explanation:

1 mole is equal to 1 moles H2O, or 18.01528 grams

18.01528 times 2.6 = 46.839728

There are 46.839728 grams h20 in 2.60 mol of the compound

4 0

3 years ago

What are tissues made up of?

Aleks [24]

Answer should be:

Cells

5 0

3 years ago

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What is the concentration in mol L-l of a 12% solution of tetrahydrate magnesium chloride (MgCl2)?

madreJ [45]

The concentration in mol L-l (M) = 0.717

<h3>Further explanation</h3>

Given

12% solution of tetrahydrate magnesium chloride (MgCl₂)

Required

The concentration

Solution

Tetrahydrate magnesium chloride (MgCl₂)⇒MgCl₂.4H₂O

MW = Ar Mg+2. Ar Cl+8. Ar H + 4. Ar O

MW=24.31 + 2 x 35.45 + 8 x 1.01 + 4 x 16

MW=24.31+70.9+8.08+64

MW=167.29 g/mol

12% solution = 12 % m/v = 12 g in 100 ml solution

For 1 L solution :

$\tt \dfrac{1}{0.1}\times 12~g=120~g$

The concentration in g/L = 120 g/L

Convert grams to moles :

$\tt mol=\dfrac{120}{167.29}=0.717$

3 0

3 years ago

Which sequence of atomic numbers represents elements that have similar chemical properties?

Savatey [412]

C is the correct answer I think have a good day

6 0

3 years ago

Read 2 more answers

31 gof phosphorousreacted with oxygengas to form 71 gof a phosphorousoxide. what is the empirical formulaof the oxide

dangina [55]

In this problem you would need to determine the mass of each element first. The mass of phosphorus is given which is 31 grams. The mass of oxygen is the difference between 71 grams and 31 since we know that the compound formed weighs 71 grams. Then determine the moles of each element. You would get 1.0009 moles for phosphorus and 2.5 moles for oxygen. You have to then multiply the moles to the lowest number that would give a whole number for each element. The empirical formula of the oxide is P2O5.

7 0

3 years ago