2 years ago

Anyone who wanna be my frien this is my sn id hassaan_navee21I am b

Chemistry

1 answer:

Marysya12 [62]2 years ago

4 0

Answer:

sure

Explanation:

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The percent composition of calcium is ?

DochEvi [55]

Answer: 40.1%

Explanation: The mass of calcium in this compound is equal to 40.1 grams because there's one atom of calcium present and calcium has an atomic mass of 40.1 . The molar mass of the compound is 100.1 grams. Using the handy equation above, we get: Mass percent = 40.1 g Ca⁄100.1 g CaCO3 × 100% = 40.1% Ca.

5 0

3 years ago

3. A thin lead apron is used to protect patients from harmful X rays. If the sheet measures 75.0 cm by 55.0 cm by 0.10 cm, and t

DanielleElmas [232]

Answer:

4.67 kg

Explanation:

Given data

Dimensions of the lead sheet: 75.0 cm by 55.0 cm by 0.10 cm

Density of lead: 11.3 g/cm³

Step 1: Calculate the volume of the sheet

The volume of the sheet is equal to the product of its dimensions.

$V = 75.0 cm \times 55.0 cm \times 0.10 cm = 413 cm^{3}$

Step 2: Calculate the mass of the sheet

The density (ρ) is equal to the mass divided by the volume.

$\rho = \frac{m}{V} \\m = \rho \times V = \frac{11.3g}{cm^{3} } \times 413cm^{3} = 4.67 \times 10^{3} g = 4.67 kg$

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2 years ago

This is the phase of matter with no fixed shape or volume.

madreJ [45]

By circle fraction additional number for the number

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2 years ago

What goes in the blank?

Anon25 [30]

Protons goes in the blank. the word can be used for both.

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3 years ago

Is forms from coal, oil, and gas burning physical or chemical weathering

storchak [24]

The answer is chemical weathering

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3 years ago

Anyone who wanna be my frien this is my sn id hassaan_navee21I am b​

Anyone who wanna be my frien this is my sn id hassaan_navee21I am b