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zlopas [31]
3 years ago
6

Which statement is the best description of a chemical reaction? A.The combustion of a substance B.The decomposition of particles

C.Mixing two substances D.Forming or breaking bonds
Chemistry
2 answers:
avanturin [10]3 years ago
6 0
D. Forming or breaking bonds
Andrej [43]3 years ago
4 0
Hi there!

The answer would be D. Forming or breaking bonds.

When forming or breaking bonds, a new substance is created and it’s no longer just a physical change. Sometimes when bonds are breaking and new ones are forming there can be a change in composition.

Hope this helps !
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MAVERICK [17]

Answer:

C

Explanation:

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4 0
2 years ago
How many moles are contained in 2.3 liters of a 1.2M solution?
elena-s [515]

Answer:

\boxed {\boxed {\sf 2.76 \ mol}}

Explanation:

Molarity is found by dividing the moles of solute by liters of solution.

molarity = \frac {moles}{liters}

We know the molarity is 1.2 M (mol\liter) and there are 2.3 liters of solution. Substitute the known values into the formula.

1.2 \ mol/liter= \frac {x}{2.3 \ liters}

Since we are solving for x, we must isolate the variable. It is being divided by 2.3 and the inverse of division is multiplication. Multiply both sides by 2.3 liters.

2.3 \ liters *1.2 \ mol/liter= \frac {x}{2.3 \ liters}* 2.3 \ liters\\2.3 *1.2 \ mol= x\\2.76 \ mol =x

In a solution with a molarity of 1.2 and 2.3 liters of solution, there are 2.76 moles.

3 0
3 years ago
IDENTIFY THE NUMBER OF SIGNIFICANT FIGURES IN EACH OF THESE MEASUREMENTS OF AN OBJECT: 76.47 AND 76.59
murzikaleks [220]

Answer:

they both have 4 sig figs:)

Explanation:

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