The electron configuration for an atom is 1s22s22p2. How many electrons does the atom have?

2 answers:

8 0

If each atom of element D has 3 mass units and each atom of element E has 5 mass units, a molecule composed ..... The electron configuration for the carbon atom (c) is 1s2 2s2 2p2.

nexus9112 [7]3 years ago

4 0

the answer is (C.6), but I am not entirely sure

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Be + O2 --> BeO<br><br> Balance this and what's the type of reaction?

max2010maxim [7]

Answer:

2Be + O2 = 2BeO

its a synthesis

Explanation:

7 0

2 years ago

What is the molality of sodium chloride in solution that is 13.0% by mass sodium chloride and that has a density of 1.10 g/ml?

8090 [49]

Answer is: molality od sodium chloride is 2,55 mol/kg.
V(solution) = 100 ml.
m(solution) = d(solution) · V(solution).
m(solution) = 1,10 g/ml · 100 ml.
m(solution) = 110 g.
ω(NaCl) = 13,0% = 0,13.
m(NaCl) = ω(NaCl) · m(solution).
m(NaCl) = 0,13 · 110 g.
m(NaCl) = 14,3 g.
n(NaCl) = m(NaCl) ÷ M(NaCl).
n(NaCl) = 14,3 g ÷ 58,5 g/mol.
n(NaCl) = 0,244 mol.
m(H₂O) = 110 g - 14,3 g.
m(H₂O) = 95,7 g = 0,0957 kg.
b(NaCl) = n(NaCl) ÷ m(H₂O).
b(NaCl) = 0,244 mol ÷ 0,0957 kg.
b(NaCl) = 2,55 mol/kg.

3 0

3 years ago

The average human body temperature is 98.6 °

grin007 [14]

It's 37 degrees Celsius

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3 years ago

What type of bond is present between two atoms of tungsten in a light bulb filament?

stiks02 [169]

Answer:

ionic bonding

Explanation: