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3 years ago

The compound KOH is called

Chemistry

2 answers:

Debora [2.8K]3 years ago

6 0

Answer: potassium hydroxide

Explanation:the k is a chemical symbol kalium standing for potassium while the OH stands for hydroxide

denis-greek [22]3 years ago

4 0

Answer:

It is called Potassium Hydroxide

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Explanation:

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3 years ago

a sample of gold is heated from 12 degrees to 28 degrees celsius and absorbs 460 joules of energy. What is the mass of gold?

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2 years ago

The combustion of propane may be described by the chemical equation C 3 H 8 ( g ) + 5 O 2 ( g ) ⟶ 3 CO 2 ( g ) + 4 H 2 O ( g ) C

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Answer: 72 grams of $O_2(g)$ are needed to completely burn 19.7 g $C_3H_8(g)$

Explanation:

According to avogadro's law, 1 mole of every substance weighs equal to molecular mass and contains avogadro's number $6.023\times 10^{23}$ of particles.

To calculate the number of moles, we use the equation:

$\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}$

Putting in the values we get:

$\text{Number of moles}=\frac{19.7g}{44g/mol}=0.45moles$

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According to stoichiometry:

1 mole of $C_3H_8$ requires 5 moles of oxygen

0.45 moles of $C_3H_8$ require= $\frac{5}{1}\times 0.45=2.25$ moles of oxygen

Mass of $O_2=moles\times {\text {Molar mass}}=2.25\times 32=72g$

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3 years ago

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Answer:

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Explanation:

Alpha decay is indicative of loss of the equivalents of a helium particle emission. The reaction equation for this reaction is shown below:

$_{92} ^{238} U_{}$ → $_{90} ^{234} Th_{} + _{2} ^{4} He_{}$

I hope this explanation is clear and explanatory.

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Answer:

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3 years ago

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