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3 years ago

Can somebody please help with this question?

Chemistry

1 answer:

Leni [432]3 years ago

7 0

Most of the mass of an atom is located in the (nucleus), and most of the volume is taken up by the (electron clouds).

The ones in the parenthesis are your answers.

Hope this helps!

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A mug of boiling-hot water sits next to a glass of ice water.

seraphim [82]

Answer:

a) water molecules move rapidly in the mug of boiling water while they move slowly in the ice water. In the ice itself, the molecules stay in place.

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Explanation:

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3 years ago

Why is the My Plate constructed in the way it is?

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4 years ago

Your teacher lights a small candle and allows it to burn. At first, the candle wax melts, but then it seems to burn away and dis

Margarita [4]

Burning of the candle is both physical and chemical change.burning of the candle causes the candle to melt the wax.so the wax has changed it was solid now it is liquid.the wax combines with the atmospheric oxygen and changes to carbon dioxide,heat and light.thus both the changes are accompanied by the burning of the candle.

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1 year ago

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Express (3 x 104) (4 x 1023) in scientific notation

jeka57 [31]

1 x 10^28 this what the <span>scientific notation</span>

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4 years ago

If 5.12 liters of a 2.75 M phosphoric acid is neutralized by magnesium hydroxide solution of 4.00 M.

Tresset [83]

Answer:

5.28 L

Explanation:

Step 1:

Data obtained from the question.

Volume of acid (Va) = 5.12L

Molarity of acid (Ma) = 2.75M

Molarity of base (Mb) = 4M

Volume of base (Vb) =.?

Step 2:

The balanced equation for the reaction

2H3PO4 + 3Mg(OH)2 → Mg3(PO4)2 + 6H2O

From the balanced equation above,

Mole ratio of the acid (nA) = 2

Mole ratio of the base (nB) = 3

Step 3:

Determination of the volume of the base.

This is illustrated below:

MaVa/MbVb = nA/nB

2.75 x 5.12 / 4 x Vb = 2/3

Cross multiply

4 x 2 x Vb = 2.75 x 5.12 x 3

Divide both side by 4 x 2

Vb = (2.75 x 5.12 x 3)/(4 x 2)

Vb = 5.28 L

Therefore, the volume of the base is 5.28 L

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4 years ago

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