3 years ago

Which of the following stars is most likely to be red?

Chemistry

2 answers:

ohaa [14]3 years ago

3 0

I’m pretty sure the answer is C

labwork [276]3 years ago

3 0

Star B bc the coldest stars are red

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Which of the following pairs does not share the same empirical formula?

Svetradugi [14.3K]

PbCl2 and PbCl4

Empirical formula is when the molecular formula is reduced (each element) by the same number until you are unable to do so any further.
CH2O cannot be further reduced, but C3H6O3 can all be divided by 3 making it CH2O (same empirical formula)

5 0

2 years ago

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Molar mass of c(no3)2

slava [35]

I believe that it is 187.56 g/mol

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3 years ago

When a reaction system is at equilibrium: a. there is no more chemistry happening. b. the amounts of reactants and products are

Lapatulllka [165]

Answer: Option (e) is the correct answer.

Explanation:

Equilibrium is defined as the state of a chemical reaction in which the rate of forward reaction is equal to the rate of backward reaction.

The state of equilibrium is represented by a double sided arrow as " $\rightleftharpoons$ " in a chemical equation.

For example, $H_{2}O(l) \rightleftharpoons H^{+}(aq) + OH^{-}$

Therefore, we can conclude that when a reaction system is at equilibrium then the rates of the reaction in the forward and reverse directions are exactly equal.

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2 years ago

Which of the following will dissociate into the largest number of ions in solution?

Svetlanka [38]

Answer:D

Explanation:

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3 years ago

The bottom number on the periodic table is called?

salantis [7]

Answer:

The atomic number that should be here, 57, is located at the bottom of the table in the row called the Lanthanides. Directly below the space in Row 6, in Row 7, is another empty space, which is filled by a row called the Actinides, also seen at the bottom of the chart.

Explanation:

hope this helps!

8 0

3 years ago