Ask question

Ask question

All categories

3 years ago

7

Which statement is the best description of a chemical reaction? the decomposition of particles the combustion of a substance for

ming or breaking bonds mixing two substances

2 answers:

guapka [62]3 years ago

5 0

Answer:

Forming and Breaking Bonds would be the correct answer

Explanation:

took the test and got it correct

Rom4ik [11]3 years ago

3 0

The combustion of a substance forming or breaking bonds mixing two substances.

You might be interested in

According to the following reaction, how many grams of hydrogen peroxide (H2O2) are needed to form 32.0 grams of oxygen gas?

Nesterboy [21]

Answer:

The answer to your question is 34 g of H₂O₂

Explanation:

Data

mass of H₂O₂ = ?

mass of O₂ = 32 g

Process

1.- Write the balanced chemical reaction

H₂O₂ ⇒ H₂ + O₂

2.- Calculate the molar mass of H₂O₂ and O₂

Molar mass H₂O₂ = (1 x 2) + (16 x 2) = 34 g

Molar mass of O₂ = 2 x 16 = 32 g

3.- Use proportions to calculate the mass of O₂

34g of H₂O₂ -------------- 32g of O₂

x -------------- 32g of O₂

x = (32 x 34) / 32

x = 34 g of H₂O₂

5 0

3 years ago

a cell was taken from dolly the sheep and used to make a geneticly identical copy of her the copy lived to be 6 years old what i

nevsk [136]

Explanation:

dolly was cloned I guess

8 0

3 years ago

A 0.753 g sample of a monoprotic acid is dissolved in water and titrated with 0.250 M NaOH. What is the molar mass of the acid i

Alexeev081 [22]

Answer:

$MM_{acid}=140.1g/mol$

Explanation:

Hello,

In this case, since the acid is monoprotic, we can notice a 1:1 molar ratio between, therefore, for the titration at the equivalence point, we have:

$n_{acid}=n_{base} \\\\V_{acid}M_{acid}=V_{base}M_{base}\\\\n_{acid}=V_{base}M_{base}$

Thus, solving for the moles of the acid, we obtain:

$n_{acid}=0.0215L*0.250\frac{mol}{L}=5.375x10^{-3}mol$

Then, by using the mass of the acid, we compute its molar mass:

$MM_{acid}=\frac{0.753g}{5.375x10^{-5}mol} \\\\MM_{acid}=140.1g/mol$

Regards.

7 0

3 years ago

Percocet contains oxycodone at varying strengths.Every strength also contains 325 mg of

Marat540 [252]

5.56 Rhats The right answer

6 0

3 years ago

PLEASE ANSWER IF YOU KNOW

Lerok [7]

Answer:

The tundra!

Explanation:

It is the only biome that has an average winter temperature of -26 degrees Celsius, gets 12-20 inches of rain per year, and has grazing caribou!

Hope this helps!

3 0

3 years ago