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2 years ago

2. Katelyn is drinking a glass of tea. As the tea sits in the sun it begins to warm up. To

Chemistry

2 answers:

Paraphin [41]2 years ago

7 0

AnswerB:

Explanation:

In-s [12.5K]2 years ago

3 0

Answer:

B. As the ice melts it releases heat which then cools down the ice tea

Explanation:

THE GUY UP SAID IT WAS B.

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How can general properties influence element location on a periodic table?

REY [17]

Answer:

The elements in the periodic table are arranged in order of increasing atomic number.

Explanation:

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2 years ago

Formaldehyde is a carcinogenic volatile organic compound with a permissible exposure level of 0.75 ppm. At this level, how many

Flauer [41]

Answer : The amount of formaldehyde permissible are, $5.4\times 10^{-6}g$

Explanation : Given,

Density of air = $1.2kg/m^3=1.2g/L$ $(1kg/m^3=1g/L)$

First we have to calculate the mass of air.

$\text{Mass of air}=\text{Density of air}\times \text{Volume of air}$

$\text{Mass of air}=1.2g/L\times 6.0L$

$\text{Mass of air}=7.2g$

Now we have to calculate the amount of formaldehyde.

Permissible exposure level of formaldehyde = 0.75 ppm = $\frac{0.75g\text{ of formaldehyde}}{10^6g\text{ of air}}$

Amount of formaldehyde in 7.2 g of formaldehyde = $7.2g\times \frac{0.75g\text{ of formaldehyde}}{10^6g\text{ of air}}$

Amount of formaldehyde in 7.2 g of formaldehyde = $5.4\times 10^{-6}g$

Thus, the amount of formaldehyde permissible are, $5.4\times 10^{-6}g$

8 0

3 years ago

Which of these is an example of a chemical change?

Lady_Fox [76]

The only one example of a chemical change would be:

B. Leaving cheese out to get moldy.

Because there is a chemical reaction.

6 0

2 years ago

Read 2 more answers

Select all that apply: Select the benefits of sexual reproduction.

malfutka [58]

Sexual reproduction promotes adaptations, increases genetic diversity, and increases chances of survival.

6 0

3 years ago

Complete the mechanism for the acid-catalyzed hydrolysis of the epoxide in alcohol by adding any missing atoms, bonds, charges,

Sauron [17]

Answer:

See explanation below

Explanation:

You are missing the structure, therefore, I will do an example with one that I found on another place to try to explain.

This acid mechanism always involves carbocations, and positive charges, never negative because we are in acidic mediums.

In the first step, the lone pairs of the oxigen from the epoxide, substract one hydrogen of the reactant.

Second step, the lone pairs of the oxygen from the reactant, do a nucleophylic attack to the carbon of the epoxide. In this case, it will do it to the most substitued carbon.

Then, in the third step by acid base equilibrium, the hydrogen from the reactant that attacked, is substracted from the molecule by a molecule of water (We are in acid medium, therefore, there is traces of water) and the final structure is formed.

Check picture for mechanism:

4 0

2 years ago