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jonny [76]
2 years ago
5

If 200mL of 0.60 M MgCl2 (aq) is added to 400mL of distilled water, what is the concentration of Mg2+(aq) in the resulting solut

ion with the total volume of 600mL? A.0.20M. B.0.30M. C.0.60M D.1.2M
Chemistry
1 answer:
lara [203]2 years ago
3 0

Answer:

A.0.20M

Explanation:

c 1 V 1 = c 2 V 2

Initial Volume, V1 = 200 mL

Final Volume, V2 = 200 + 400 = 600 mL

Initial Concentration, c1 = 0.60 M

Final Concentration, c2= ?

Solving for c2;

c2 = c1v1 / v2

c2 = 0.60 * 200 / 600

c2 = 0.20M

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Which statement best describes how photosynthesis follows the law of conservation of mass?
leva [86]

Answer:

O The number of oxygen atoms in the reactants used by this process equals the total number of oxygen atoms in the products.

Explanation:

The statement that best describes how photosynthesis follows the law of conservation of mass is that the number of oxygen atoms in the reactants used by this process is equal to the total number of oxygen atoms in the products.

 The equation of photosynthesis reaction is given as:

        6CO₂    +     6H₂O    →    C₆ H₁₂ O₆ +  6O₂

According to the law of conservation of mass, matter is neither created nor destroyed during the course of a chemical reaction.

By the virtue of this, the number of oxygen atom on both sides of the expression must be the same. Also, the number of carbon and hydrogen atoms must also be the same.

8 0
3 years ago
Describe two ways that thermal energy transfer in earth changes the land
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There are three methods of thermal energy transfer: conduction, convection, and radiation. Air molecules that come into contact with the warmer land and surface of the oceans and lakes increase their thermal energy through conduction.
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3 years ago
How is this reaction classified?
boyakko [2]
B is the answer

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3 0
3 years ago
20 L of nitrogen gas are collected at a temperature of 50°C and 2 atm. How many grams of nitrogen gas were collected?
Andreas93 [3]

Answer:

0.1077 grams

Explanation:

First we will employ the ideal gas law to determine the number of moles of nitrogen gas.

PV=nRT

P=2 atm

V=20L

R=0.08206*L*atm*mol^-1*K^-1

T=323.15 K

Thus, 2atm*20L=n*0.08206*L*atm*mol^-1*K^-1*323.15K

K, atm, and L cancels out. Thus n=2*20mol/0.08206*323.15=1.5 moles

Lastly, we must convert the number of moles to grams. This can be done by dividing the number of moles by the molar mass of nitrogen gas, which is 14 grams.

1.5/14=0.1077 grams

8 0
2 years ago
One half of a balanced chemical equation is shown. 3Mg(OH)2 + 2H3PO4 Which lists the numbers of each atom the other half of the
Fudgin [204]

Answer:

A) 3 Mg, 2 P, 14 O, 12 H

Explanation:

On edgenuity 2020

7 0
3 years ago
Read 3 more answers
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