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miss Akunina [59]
3 years ago
13

Which of the following is an endothermic reaction?

Chemistry
2 answers:
telo118 [61]3 years ago
5 0
The answer is the reaction ins a cold pack
aev [14]3 years ago
3 0
Combustion of methane. 
reason behind this is because an endothermic reaction basically means releasing heat when a chemical reaction occurs "endo" meaning outside and "thermic" meaning heat  
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What is the difference between Arrhenius acids-base and bronsted-lowry acids bases? Justify your answer.
Oxana [17]

Answer:

A Bronsted-Lowry acid like and Arrhenius acid is a compound that breaks down to give an H+ in solution. The only difference is that the solution does not have to be water. ... An Arrhenius base is a molecule that when dissolved in water will break down to yield an OH- or hydroxide in solution.

Explanation:

7 0
3 years ago
Avery has a glass of pure water. She pours a tablespoon of sugar into the water to make it taste sweet.
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The first blank is a compound, second is a mixture
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A 25.0 mL sample of an acetic acid solution is titrated with a 0.175 M NaOH solution. The equivalence point is reached when 26.6
joja [24]

<u>Answer:</u> The concentration of CH_3COOH comes out to be 0.16 M.

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

n_1M_1V_1=n_2M_2V_2

where,

n_1,M_1\text{ and }V_1 are the n-factor, molarity and volume of acid which is CH_3COOH

n_2,M_2\text{ and }V_2 are the n-factor, molarity and volume of base which is NaOH.

We are given:

n_1=1\\M_1=?M\\V_1=25mL\\n_2=1\\M_2=0.175M\\V_2=26.6mL

Putting values in above equation, we get:

1\times M_1\times 25=1\times 0.175\times 26.6\\\\M_1=0.1862M

Hence, the concentration of CH_3COOH comes out to be 0.1862 M.

4 0
3 years ago
Which of the following are membranous sacs abundant in kidney and liver cells?
atroni [7]

Answer: it’s B!! :)

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3 years ago
When testing to see how water affects plant growth, John make sure one set of his plants does not get water. This set of plants
Mashcka [7]

Answer:

control.

Explanation:

during an experiment you are required to maintain a separate group of subjects to collect data on so you will be able to make comparisons from your observations. assuming the watered plants grew, what does that mean? they grew at a quicker rate? slower rate? the same rate? compared to what? you need this control group in order to prove your observations either one way or the other such as "compared to unwatered plants, the watered plants grew at *blank* rate."

4 0
3 years ago
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