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2 years ago

Which phase change in an example of an exothermic process?

Chemistry

2 answers:

photoshop1234 [79]2 years ago

5 0

C. liquid to solid i hope this helps

Rina8888 [55]2 years ago

5 0

I believe it would be A.

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What is this sign plz tell for 100 points

steposvetlana [31]

It's a hazard symbol for irritant.

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2 years ago

Read 2 more answers

One way the U.S. Environmental Protection Agency (EPA) tests for chloride contaminants in water is by titrating a sample of silv

Flauer [41]

Answer:

1.1 × 10⁻⁴ M

Explanation:

Let's consider the following double displacement reaction.

CuCl₂(aq) + 2 AgNO₃(aq) → 2 AgCl(s)+ Cu(NO₃)₂(aq)

We can establish the following relations:

The molar mass of AgCl is 143.32 g/mol.
The molar ratio of AgCl to CuCl₂ is 2:1

The moles of CuCl₂ that reacted to produce 7.7 mg of AgCl are:

$7.7 \times 10^{-3} gAgCl.\frac{1molAgCl}{143.32gAgCl} .\frac{1molCuCl_{2}}{2molAgCl} =2.7 \times 10^{-5}molCuCl_{2}$

The molarity of CuCl₂ is:

$M=\frac{2.7 \times 10^{-5}molCuCl_{2}}{0.250L} =1.1\times 10^{-4} M$

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2 years ago

Shown is an infrared image of a star, Beta Pictoris. Why would scientists use infrared light to take this image instead of

makvit [3.9K]

B is the correct answer

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2 years ago

Which of the following elements has a complete outer shell of electrons? A. Iron (Fe) B. Hydrogen (H) C. Neon (Ne) D. Nitrogen (

Julli [10]

Answer:

The answer is Neon

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2 years ago

_____ The primary function of molecular membranes is the transport of ions and molecules into and out of cells. The movement of

ale4655 [162]

<h2>Active Transport </h2>

Explanation:

A cell uses energy for the movement of substances against a concentration gradient or an electrochemical gradient that maintains a balanced concentration of ions and molecules in living cells.
This transport of substances is known as Active transport mechanisms which are the basic function of the cell membranes.
The energy used is in the form of ATP.
Active transport occurs when there is a difference in the concentration of particles on both sides.

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3 years ago