Which one of the following substances is a liquid fuel used in rocket engines?

Chemistry

2 answers:

gogolik [260]3 years ago

5 0

Answer:

Condium nitrate

Explanation:

while I do believe it's A if this is for PennFoster I'm almost positive they are looking for C.

uranmaximum [27]3 years ago

3 0

Liquid oxygen can be used as an oxidizer in rocket fuel as one of two propellants needed.

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

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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

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elena55 [62]

The answer is in the attachment below: