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My name is Ann [436]

2 years ago

8

What part of the atom is involved in chemical reactions?

1 answer:

Lesechka [4]2 years ago

7 0

Chemical reactions happen when two or more atoms go together to form molecules or when Atoms brake

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Match each section of the atomic structure

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skelet666 [1.2K]

I'm pretty sure number 48 is C. Hope this helped :)

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the figure shows particles of a substance in a closed container. Which state of matter is shown in the figure?

FromTheMoon [43]

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Which statement correctly compares sound and light waves?

Mrac [35]

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3 years ago

Calculate the number of grams of solute in 500.0 mL of 0.189 M KOH.

KIM [24]

Answer : The number of grams of solute in 500.0 mL of 0.189 M KOH is, 5.292 grams

Solution : Given,

Volume of solution = 500 ml

Molarity of KOH solution = 0.189 M

Molar mass of KOH = 56 g/mole

Formula used :

$Molarity=\frac{\text{Mass of KOH}\times 1000}{\text{Molar mass of KOH}\times \text{Volume of solution in ml}}$

Now put all the given values in this formula, we get the mass of solute KOH.

$0.189M=\frac{\text{Mass of KOH}\times 1000}{(56g/mole)\times (500ml)}$

$\text{Mass of KOH}=5.292g$

Therefore, the number of grams of solute in 500.0 mL of 0.189 M KOH is, 5.292 grams

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2 years ago

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