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3 years ago

What is the meaning of a chemical reaction?

Chemistry

2 answers:

Margarita [4]3 years ago

5 0

When you have a chemical reaction, it means something goes wrong with your chemicals.

Margarita [4]3 years ago

4 0

The meaning of a chemical reaction is to experiment with different things so scientist can be safe a help people

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The Ksp of silver bromide at 25°C (298 K) is 5.0 x 10-13. Write the solubility expression hydrogen oxygen for this compound and

Rufina [12.5K]

AgBr(s) <—> Ag+(aq) + Br-(aq)

Ksp = [Ag+][Br-]

5 0

2 years ago

Ammonium Iodide dissociates reversibly to ammonia and hydrogen iodide:

NeTakaya

Answer:

The partial pressure of ammonia at equilibrium when a sufficient quantity of ammonium iodide is heated to 400°C Is 0.103 atm.

The correct option is A.

Explanation;

NH4I(s) ⇋ NH3(g) + HI(g)Kp = 0.215 at 400°C

NH4I(s)= 0.215

NH3(g)=0.103

HI(g)Kp=0.112

Therefore = 0.103 +0.112= 0.215

Therefore the partial pressure of ammonia at equilibrium is 0.103 atm

7 0

3 years ago

Rearrange the elements in the order of increasing first ionization energy. Place the element symbol with the lowest first ioniza

Nastasia [14]

Answer:

I,Br,Cl,F

Explanation:

ionization energy decreases the farther down an element is

5 0

2 years ago

An isotope of yttrium has 39 protons and 59 neutrons. what is the atomic mass of that isotope?

Charra [1.4K]

We can define atomic mass the total of number of protons and number of neutrons in an atom or isotope.
<span>So when an isotope of yttrium has 39 protons and 59 neutrons, its atomic mass is equal to;
number of protons + number of neutrons = 39 + 59 = 98</span>

8 0

2 years ago

You have a sample of 75.6 g of C3H8. How many moles of C3H8 are in the sample?

dsp73

The number of moles that are contained in the given mass of propane ( $C_3H_8$ is 1.7143 moles.

<u>Given the following data:</u>

Mass of propane = 75.6 grams.

<u>Scientific data:</u>

The molar mass of propane = 44.1 g/mol.

To calculate the number of moles that are contained in the given mass of propane ( $C_3H_8$ ):

<h3>How to calculate the moles of a compound.</h3>

In this exercise, you're required to determine the number of moles of propane that are contained in the given sample:

Mathematically, the number of moles contained in a chemical compound is given by this formula:

$Number\;of\;moles = \frac{mass}{molar\;mass}$

Substituting the given parameters into the formula, we have;

$Number\;of\;moles = \frac{75.6}{44.1}$

Number of moles = 1.7143 moles.

Read more on number of moles here: brainly.com/question/3173452

3 0

2 years ago