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TEA [102]
3 years ago
8

PLEASE HELP NOOWWWWWW!!! 20 BRAINLEIST!!

Chemistry
1 answer:
White raven [17]3 years ago
6 0
. When the forces acting on the object are balanced.
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1. What is the mass of 2.65×1023 atoms of lithium? grams
masya89 [10]

Answer: 3.05 grams

Explanation:

To find the mass in grams, we need to use Avogadro's number and the molar mass of lithium.

Avogadro's number: 6.022×10²³ atoms/mol

Molar mass: 6.94 g/mol

2.65*10^2^3 atoms*\frac{mol}{6.022*10^2^3 atoms} *\frac{6.94g}{mol} =3.05 g

5 0
3 years ago
The majority of the mass of the atom is located in the _______. A) nucleus B) core electrons C) pions and quarks D) valence elec
NeX [460]

The majority of the mass of the atom is located in the nucleus. Remember that the nucleus contains both protons and neutrons and therefore, most of the mass of the atom.

5 0
3 years ago
Read 2 more answers
Calculate the solubility (in M) of cobalt(II) hydroxide, Co(OH)2(s) in H2O. Ksp = 1.10×10-16 at a specific temperature.
Oksanka [162]

Answer:

3.018 x 10⁻⁶ M.

Explanation:

  • Co(OH)₂ dissociates in solution according to the equation:

<em>Co(OH)₂ →</em> <em>Co²⁺ + 2OH⁻.</em>

<em></em>

<em>∵ Ksp = [Co²⁺][OH⁻]² = (s)(2s)² = 4s³.</em>

<em />

∴ 4s³ = 1.10 x 10⁻¹⁶.

∴ s³ = 1.10 x 10⁻¹⁶/4 = 2.75 x 10⁻¹⁷.

∴ s = ∛(2.75 x 10⁻¹⁷) = 3.018 x 10⁻⁶ M.

5 0
3 years ago
What is the chemical symbol for magnesium?
Drupady [299]
This is how Magnesium appears on the table of elements

12
Mg
Magnesium 
24.305

The symbol for it is Mg
8 0
4 years ago
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Which of the following bases could you write an equilibrium expression for?
Leno4ka [110]

D. I hope you have a good morning

- Josie Annette

3 0
3 years ago
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