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3 years ago

Which statements correctly describe light (Select all that apply)

Chemistry

1 answer:

egoroff_w [7]3 years ago

6 0

Answer:

The correct answers are C and D.

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A 46.2 mL,0.568 M calcium nitrate solution is mixed with 80.5mL of 1.396M calcium nitrate solution.Calculate tge concentration o

Ne4ueva [31]

Answer:

1.09 M

Explanation:

Let's define the equation that will be used to calculate the final concentration of the resultant calcium nitrate solution. In order to calculate it, we need to find the total number of moles of calcium nitrate and divide by the total volume of the resultant solution:

$c=\frac{n}{V}$

This equation firstly helps us find the number of moles of calcium nitrate. Multiplying molarity by volume will yield the moles. Adding the moles from the first component to the second component will provide us with the total number of moles of calcium nitrate:

$n_{Ca(NO_3)_2}=46.2 mL\cdot0.568 M+80.5 mL\cdot1.396 M=138.62 mmol$

Now, the total volume of this solution can be found by adding the volume values of each component:

$V_total=46.2 mL+80.5 mL=126.7 mL$

Finally, dividing the moles found by the total volume will yield the final molarity:

$c_{final}=\frac{138.62 mmol}{126.7 mL}= 1.09 M$

6 0

3 years ago

Please help ASAP, chemistry question. I’ll make your answer the BRAINLIEST. Thanks (picture attached)

Naddika [18.5K]

Answer:

Electrochemical Cell

Explanation:

An electrochemical cell is a device that can generate electrical energy from the chemical reactions occurring in it, or use the electrical energy supplied to it to facilitate chemical reactions in it. These devices are capable of converting chemical energy into electrical energy, or vice versa.

7 0

3 years ago

I NEED HELP!!!!!!!!!!!!!!!!!!!!!!!

Karolina [17]

Answer:

B.Self powered

Explanation:

They move by themselves.Hope this answer helps you ;)

6 0

3 years ago

HELP HELP ME PLSS

Akimi4 [234]

Answer:

the average answer in maybe 60

6 0

3 years ago

Using the equations and enthalpy values provided, which mathematical expression can be used to determine the unknown enthalpy ch

vlabodo [156]

In order to solve this, we need to make use of Hess' Law.

We are already given the equations and their corresponding deltaH. Using Hess' Law, we can generate this equation:
104 kJ = x - (-1182 kJ) - (-1144 kJ)

Among the choices, the answer is
<span>B.104 = x - [(-1182) + (-1144)]
</span>

3 0

3 years ago

Read 2 more answers