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VARVARA [1.3K]
1 year ago
13

White lead is a pigment used by artists for centuries

Chemistry
1 answer:
MAVERICK [17]1 year ago
3 0

Answer:

true

Explanation:

pigment contains chlorine which gives color

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In a soil profile, which is the second layer?<br> solid rock<br> subsoil<br> parent rock<br> topsoil
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Subsoil is the layer of soil under the topsoil on the surface of the ground.

7 0
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Atoms bond due to the interactions between
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The answer would be 2 in ths case, bonding has to do with the electron orbitals. 
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Use the periodic table to write the electron configuration of selenium (Se). s s p d 1 2 3 4 6 10
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Explanation:

I suggest looking at the electron configuration chart, it has really helped me a lot :)

4 0
2 years ago
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A graduated cylinder contains 17.5 ml of water. When a metal cube is placed onto the cylinder, it’s water level rises to 20.3 ml
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Answer:

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4 0
3 years ago
17. Which of the following is NOT an empirical formula? *
Aloiza [94]

Answer: 17) d. C_2H_6

18. c. The empirical formula of a compound can be twice the molecular formula.

Explanation:

Molecular formula is the chemical formula which depicts the actual number of atoms of each element present in the compound.  

Empirical formula is the simplest chemical formula which depicts the whole number of atoms of each element present in the compound.  

To calculate the molecular formula, we need to find the valency which is multiplied by each element to get the molecular formula.

The equation used to calculate the valency is:

n=\frac{\text{molecular mass}}{\text{empirical mass}}

The empirical mass can be calculated from empirical formula and molar mass must be known.

17. Thus the empirical formula of C_2H_6 should be CH_3

18. The molecular formula will either be same as empirical formula or is a whole number multiple of empirical formula. Thus the empirical formula of a compound can never be twice the molecular formula.

3 0
3 years ago
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