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zysi [14]
3 years ago
10

How would the moon appear from earth if the moon did not rotate?

Chemistry
1 answer:
ivolga24 [154]3 years ago
4 0
If the moon did not rotate we would see all hemispheres of the moon as it revolves around the Earth and not just the phases.
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I will give brainliest but please help me asap please
love history [14]

Answer:

A1. Sr + 2

A2. P - 3

B1. Sr3P2

Explanation:

A1. Strontium ion | Sr+2

Description: Strontium(2+) is a strontium cation

Molecular Formula: Sr+2

A2.  PubChem CID     5182128

Structure Find Similar Structures

Molecular Formula P-3

B. Strontium phosphide

PubChem CID 166710

Structure Find  Similar Structures

Molecular Formula  Sr3P2 or P2Sr3

7 0
3 years ago
How many atoms of ca are present in 8.6 mg? the atomic weight of ca is 40.08 amu?
Elina [12.6K]
One mole of any element is Avogadro's number, which is 6.02 * 10^23 atoms. One mole of Calcium is equal to its atomic weight in grams, 1 mole Ca = 40.08 x 1000 mg = 6.02 * 10^23 atoms. We have 8.6mg of Ca which means 8.6mg / 40,080mg = .00021457 of a mole of calcium. Now multiply that by Avogadro's number which gives number of atoms = 0.00021457 * 6.02 * 10^23 atoms. So the answer is 1.292 * 10^20 atoms of Ca.
8 0
3 years ago
A 1.0 L vessel contains 20.0 mol of H2, 18.0 mol of CO2, 12.0 mol of H2O,
Lena [83]

Answer:

The equilibrium constant K is 0.1967

Explanation:

Chemical equilibrium is a state of a reacting system in which no observed  changes over time, even though the reaction continues. It occurs in reversible reactions, where the rate of reaction of reagents to products is the same as that of products to reagents.

The chemical equation can be written as:

a A + b B → c C + d D

Where a, b, c, d are the stoichiometric coefficients of the reaction and A, B, C, D are the symbols or formulas of the different substances involved.

The equilibrium constant K can be defined as the ratio between the product between the concentrations of the products (in equilibrium) raised to their corresponding stoichiometric coefficients, and the product of the concentrations of the reactants (in equilibrium) raised in their corresponding stoichiometric coefficients:

Kc=\frac{[C]^{c} *[D]^{d} }{[A]^{a} *[B]^{b} }

In this case:

Kc=\frac{[CO]*[H_{2}O] }{[CO_{2}]*[H_{2}]  }

You know that:

  • [CO]=\frac{5.9 moles}{1 L} =5.9 M
  • [H_{2} O]=\frac{12 moles}{1 L} = 12 M
  • [CO_{2} ]=\frac{18 moles}{1 L} =18 M
  • [H_{2} ]=\frac{20 moles}{1L} = 20 M

Replacing:

Kc=\frac{5.9 M*12 M}{18 M*20 M}

Kc= 0.1967

<u><em>The equilibrium constant K is 0.1967</em></u>

7 0
3 years ago
What us the relationship between protons and neutrons
11Alexandr11 [23.1K]

Both are in the nucleus of a atom

8 0
3 years ago
How many valence electrons does a sulfate (S04-2) ion contain?<br> 30<br> 32<br> 24
Firlakuza [10]

Answer:

30

Explanation:

A valance electron is an electron in the outer shell. Both Sulfur and Oxygen have 6 valance electrons. Because there is 1 sulfur atom and 4 oxygen atoms in SO4, that means it is 5x6, giving 30 valance electrons.

4 0
3 years ago
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