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ehidna [41]
3 years ago
9

Help me with these two please​

Chemistry
2 answers:
Anna007 [38]3 years ago
7 0

answer -

13 is the last one

14 is the first one

explanation for number 13 - the law of conservation of mass means that the number of atoms of the products is more than the number of atoms in the reactants. the total amount of matter (atoms) before and after a chemical reaction (change), remains the same.

explanation for number 14 -  a chemical equation describes a chemical reaction. reactants are starting materials and are written on the left-hand side of the equation. products are the end result of the reaction and are written on the right-hand side of the equation.

hope this helps :) have a nice day

**please let me know if this was wrong/not what you were looking for**

prohojiy [21]3 years ago
3 0

Answer:

13.A

14.B?

on 14 i don't know

Explanation:

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4 0
4 years ago
A solution is prepared by dissolving 0.23 mol of lactic acid and 0.27 mol of sodium lactate in water sufficient to yield 1.00 L
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Explanation:

The solution of the lactic acd and sodium lactate is referred to as a buffer solution.

A buffer solution is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. In this case, the weak acid is the lactic acid and the conjugate base is the sodium lactate.

Buffer solutions are generally known to resist change in pH values.

When a strong base (in this case, NaOH) is added to the buffer, the lactic acid will give up its H+ in order to transform the base (OH-) into water (H2O) and the conjugate base, so we have:

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3 years ago
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5 0
3 years ago
How many moles of ideal iodine gas has a volume of 1250 mL at 10 degrees C and 768 mm pressure?
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Explanation:

Hello,

In this case, since iodine is ideal we can use the ideal gas equation to compute the moles at the given conditions, considering the following units:

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