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3 years ago

Which element has 5 valence electrons on ring 4? Is it a metal, nonmetal or metalloid?_________

Chemistry

1 answer:

valina [46]3 years ago

7 0

Answer:

-Nitrogen has 5 valence electrons on the 4th shell

-nitrogen is a non metal

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A person loses 2.70 lb in two weeks. how many grams did they lose?

leonid [27]

Answer:

1224.7

Explanation:

Each lb is 453.59

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3 years ago

NaCl has a Delta. Hfus = 30. 2 kJ/mol. What is the mass of a sample of NaCl that needs 732. 6 kJ of heat to melt completely? Use

tia_tia [17]

The mass of NaCl sample has been 24.3 g. Thus, option A is correct.

The heat of fusion has been the amount of heat required to convert 1 mole of substance into solid to liquid state.

The heat required has been given as:

$Q=m\Delta H$

<h3>Computation for the mass of NaCl</h3>

The given solution has heat of fusion, $\Delta H_{fus}=30.2\rm kJ/mol$

The heat required to melt the sample has been, $Q=732.6\;\rm kJ/mol$

Substituting the values for the mass of NaCl

$\rm 732.6\;kJ/mol=Mass\;\times\;30.2\;kJ/mol\\\\
Mass=\dfrac{732.6}{30.2}\;g\\\\
 Mass=24.3\;g\\$

The mass of NaCl sample has been 24.3 g. Thus, option A is correct.

Learn more about heat of fusion, here:

brainly.com/question/87248

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3 years ago

The net force on a 300 kg lion is 3452 N as he runs after a deer. What is the lion's acceleration?

olga_2 [115]

It’s 11.5m/s2 I think

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3 years ago

If one molecule of glucose (C6H12O6) reacts completely with three molecules of oxygen (O2), what is the TOTAL number of atoms th

USPshnik [31]

Answer;

30 atoms

Explanation;

When glucose, C6H12O6, reacts with oxygen it produces carbon dioxide and water. If a molecule of glucose reacts completely with three molecules of oxygen, then 30 atoms would be produced because there are 24 atoms in glucose and 6 atoms in oxygen molecules.

The equation for the reaction would be;

C6H12O6 + 6O2(g) → 6CO2(g) + 6 H2O(l)

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3 years ago

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Which exponential expression represents the numerical expression 112⋅112⋅112⋅112? (112)4

Leni [432]

The answer is the first one

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3 years ago

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Which element has 5 valence electrons on ring 4? ____________ Is it a metal, nonmetal or metalloid?_____________________

Which element has 5 valence electrons on ring 4? Is it a metal, nonmetal or metalloid?_________