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2 years ago

Helpppp, this is due at 12:00 am !!!!

Chemistry

1 answer:

OlgaM077 [116]2 years ago

3 0

Answer:

The individual substances in a mixture can be separated using different methods, depending on the type of mixture. These methods include filtration, evaporation, distillation and chromatography.

Explanation:

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How many oxygen molecules are needed to make 10 carbon dioxide molecules according to the following balanced chemical equation?

11Alexandr11 [23.1K]

<h2 /><h2 /><h2>answer.</h2>

five oxygen molecules

step by step explanation.

according to the equation,one molecule of oxygen is enough to react with two carbon molecules thus 10 carbon molecules need 5oxygen molecules

6 0

2 years ago

Please hurry this is due tomorrow morning

Llana [10]

Answer: G Atom 1 and Atom 4.. hope this helps and good luck!

3 0

3 years ago

Add a constant temperature when the volume of the gas is decreased what happens to its pressure

Margaret [11]

Answer:

<h2>Pressure will increase</h2>

Explanation:

At a constant temperature, the pressure of gas will increase proportional to the decrease in volume of the gas.

P1V1= P2V2

Decrease in volume result in increase in pressure as the equation has to hold true.

8 0

2 years ago

What is the mass of KOH found in a 785 mL of a 1.43 M solution of KOH

My name is Ann [436]

Molarity is defined as the ratio of number of moles to the volume of solution in litres.

The mathematical expression is given as:

$Molarity = \frac{Number of moles}{volume of solution in litres}$

Here, molarity is equal to 1.43 M and volume is equal to 785 mL.

Convert mL into L

As, 1 mL = 0.001 L

Thus, volume = $785\times 0.001$ = 0.785 L

Rearrange the formula of molarity in terms of number of moles:

$Number of moles =molarity\times volume of solution in litres$

n = $1.43 M \times 0.785 L$

= 1.12255 mole

Now, Number of moles = $\frac{mass in g}{molar mass}$

Molar mass of potassium hydroxide = 56.10 g/mol

1.12255 mole = $\frac{mass in g}{56.10 g/mol}$

mass in g = $1.12255 mole\times 56.10 g/mol$

= 62.97 g

Hence, mass of $KOH$ = 62.97 g

7 0

3 years ago

Of the following two gases, which would you predict to diffuse more rapidly? SO2 or CI2

morpeh [17]

Answer:

SO2 this is my answer

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7 0

2 years ago