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anyanavicka [17]
3 years ago
8

Match each chemical with the correct use.

Chemistry
2 answers:
djyliett [7]3 years ago
6 0

Answer:

1 → D

2 → C

3 → B

4 → A

Explanation:

Benzoyl peroxide is used to treat mild to moderate acne.

Nitrous oxide  is used in surgery and dentistry as an anesthetic.

Acetylsalicylic acid is used in medications to treat inflammation , fever and pain.

Barium sulfate is CT-scan and other radio-logical examinations .Barium sulfate coats the inner lining of esophagus, stomach, intestines which helps in developing clear images of these internal body parts during x-rays.

serious [3.7K]3 years ago
3 0

1.D 2.C 3.B 4.A is the answer i believe you're looking for.

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Which two characteristics are associated with metals
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high electrical and thermal conductivity

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Tick (√) the statements that are correct.
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Based on the diagram below, which would have the most inertia?
jeka94

Answer:

The sphere on the left has the most inertia because it has more mass.

Explanation:

Inertia is a property of matter of a substance.

According to Newton's first law of motion, a body continues to stay in the state of rest or constant velocity unless acted upon a external force.

The amount of inertia that an object possess is proportional to the mass of the object.

The sphere on the left is of 300 kg and that on the right is of 30 kg.

Clearly, the sphere on the left has more mass.

Therefore, the sphere on the left has the most inertia.

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3 years ago
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What is the balanced molecular equation for the reaction between nitric acid and calcium hydroxide?
hodyreva [135]
Nitric acid is HNO3 while Calcium Hydroxide is a base with a chemical formula Ca(OH)2. When acid reacts with base, it forms salt and water (H20). Hence forming the equation HNO3 + Ca(OH)2 -> Ca(NO3)2 + H20. 
To gain the same number of atoms on both sides, the balanced molecular equation should be:
 
2NO3 + Ca(OH)2 -> Ca(NO3)2 + 2H2O

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5 0
3 years ago
2) Show the calculation of Kc for the following reaction if an initial reaction mixture of 0.800 mole of CO and 2.40 mole of H2
nadezda [96]

Answer:

Kc = 3.90

Explanation:

CO reacts with H_2 to form CH_4 and H_2O. balanced reaction is:

CO(g) + 3H_2 (g) \leftrightharpoons CH_4(g)  +  H_2O(g)

No. of moles of CO = 0.800 mol

No. of moles of H_2 = 2.40 mol

Volume = 8.00 L

Concentration = \frac{Moles}{Volume\ in\ L}

Concentration of CO = \frac{0.800}{8.00} = 0.100\ mol/L

Concentration of H_2 = \frac{2.40}{8.00} = 0.300\ mol/L

                 CO(g) + 3H_2 (g) \leftrightharpoons CH_4(g)  +  H_2O(g)

Initial            0.100      0.300             0   0

equi.            0.100 -x    0.300 - 3x     x    x

It is given that,

at equilibrium H_2O (x) = 0.309/8.00 = 0.0386 M

So, at equilibrium CO = 0.100 - 0.0386 = 0.0614 M

At equilibrium H_2 = 0.300 - 0.0386 × 3 = 0.184 M

At equilibrium CH_4 = 0.0386 M

Kc=\frac{[H_2O][CH_4]}{[CO][H_2]^3}

Kc=\frac{0.0386 \times 0.0386}{(0.184)^3 \times 0.0614} =3.90

8 0
4 years ago
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