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3 years ago

9

Electrolysis can be used for all of the following, except A. separating metals from ores. B. plating objects with metal coatings

. C. producing compounds. D. recharging batteries.

1 answer:

Assoli18 [71]3 years ago

3 0

The answer is D. recharging batteries.

You might be interested in

What is the chemical equation for diphosphorus trioxide + water ---> phosphorous acid?

Dmitriy789 [7]

Your answer is $P_{2}O_{3}+3H_{2}O\rightarrow\ 2H_{3}PO_{3}$

but if you are looking for some explanation check description below :)

Diphosphorus trioxide formula is:

$P_{2}O_{3}$

Di stands from 2 atoms of something, in this case we have 2 atoms of Phosphorus.

Trioxide means that we have 3 atoms of oxygen in this substance that's why we have: $P_{2}O_{3}$

And water is just $H_{2}O$

Unbalanced formula is:

$P_{2}O_{3}+H_{2}O\rightarrow\ H_{3}PO_{3}$

Now we need to balance this equation

On left hand side we have 2 atoms of Phosphorus, on right hand side we have just one atom of Phosphorus, that's why we need to put 2 before $H_{3}PO_{3}$

Now we need to count all atoms of oxygen and hydrogen and make it equal on both side.

So we need to put 3 on left hand side before water to make this equation balanced.
That's why correct answer is:
$P_{2}O_{3}+3H_{2}O\rightarrow\2H_{3}PO_{3}$

6 0

2 years ago

Determine the molecular formula for the unknown if the molecular mass is 60.0 amu and the empirical formula is ch2o.

mezya [45]

Answer:

The molecular formule for this unknow molecule is C2H4O2

Explanation:

The empirical formula is CH2O ( or better said CnH2nOn)

This means there are 3 elements in the formula of this molecule

⇒ Carbon (C) with a Molar mass of 12 g/mole

⇒ Hydrogen (H) with a Molar mass of 1 g/mole

⇒ Oxygen (O) with a Molar mass of 16 g/mole

We can also notice that the amount of hydrogen should 2x the amount of carbon ( also 2x the amount of oxygen).

The mass of the empirical formule = 12g/ mole + 2* 1 g/mole + 16 g/mole = 30 g/mole

To know what number is n in CnH2nOn we should divide the molecular mass by the empirical mass:

60 g/mole / 30g/mole = 2

this means n = 2

and this will give a molecular formule of C2H4O2

We can control this to calculate the molecular mass:

2*12 + 4* 1 + 2*16 = 24 + 4 + 32 = 60 g/mole

The molecular formule for this unknow molecule is C2H4O2

5 0

3 years ago

Name a Solid, Liquid, and a Gas. Solid: Liquid: Gas:

crimeas [40]

Answer:

Gas - Steam

Solid - Rock

Liquid - Juice

3 0

2 years ago

Read 2 more answers

Describe the direction in which each object will accelerate. If the object won’t accelerate, write “no acceleration.” Explain wh

Stels [109]

Answer:

unbalanced force

Explanation:

4 0

2 years ago

If a sample of gas is at 672 °C and 3.9 atm, what is the new temperature at 12.2 atm?

Snowcat [4.5K]

In order to calculate the final temperature of the gas, we may apply Charles's law, which states that the pressure and temperature of a fixed amount of gas at constant volume are directly proportional. Mathematically:
P/T = constant
(absolute temperature is used, so T = 672 + 273 = 945 K)
Thus,
3.9 / 945 = 12.2 / T
T = 2,956 K or 2,683 °C

7 0

2 years ago