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3 years ago

12

Shiloh wanted to observe the changes that occurred during an exothermic reaction. He monitored the changes and placed them in a

chart.

1 answer:

Nostrana [21]3 years ago

7 0

<span>The activation energy was reached was 10:45 a.m. The additional energy did not affect the reaction.</span>

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(Subject is actually 8th Grade Science But The don't have that... i'm sorry.)

Natasha_Volkova [10]

Answer:

I am Going to say the smallest im in 8th grade and i got that right

Explanation:

5 0

3 years ago

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The coolant in automobiles is often a 50/50 % by volume mixture of ethylene glycol, C2H6O2, and water. At 20°C, the density of e

Misha Larkins [42]

Explanation:

Let the volume of the solution be 100 ml.

As the volume of glycol = 50 = volume of water

Hence, the number of moles of glycol = $\frac{mass}{molar mass}$

= $\frac{density \times volume}{molar mass}$

= $\frac{1.1088 \times 50}{62 g/mol}$

= 0.894 mol

Hence, number of moles of water = $\frac{50 \times 0.998}{18}$

= 2.77

As glycol is dissolved in water.

So, the molality = $0.894 \times \frac{1000}{49.92}$

= 17.9

Therefore, the expected freezing point = $-1.86 \times 17.9$

= $-33.31^{o}C$

Thus, we can conclude that the expected freezing point is $-33.31^{o}C$ .

6 0

3 years ago

I need some help on this.

Orlov [11]

Answer:

I think the right answer is c/ number of atomic orbitals

5 0

3 years ago

Read 2 more answers

I’ll give 5 stars and Brainliest plus this is 20 points lol

Daniel [21]

Answer:

I think is b

Explanation:

4 0

3 years ago

Putting rock salt on the roads during a snowstorm is an example of: A. Boiling point elevation B. Vapor pressure raising C. Vapo

kvv77 [185]

Answer:

The correct answer is - D. Freezing point depression.

Explanation:

When rock salt is spread over snow-covered icy roads, it generates a liquid layer over it by melting from the surface thereby lowering or depression in the freezing point below the ice.

Therefore, due to this liquid layer comes into the contact with the ice present on the road and causes other ice to melts. This keeps on decreasing the volume of the ice on the road therefore, rock salts spread on the roads during a snowstorm.

7 0

3 years ago