3 years ago

Both active solar heating systems and passive solar heating systems

Chemistry

2 answers:

s2008m [1.1K]3 years ago

5 0

A. reduce the need to use fossil fuels

Arada [10]3 years ago

4 0

Answer:

The answer is A) REDUCE THE NEED TO USE FOSSILS FUELS GRADPOINT

GOOD LUCK!

Explanation:

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A 7.00-mL portion of 8.00 M stock solution is to be diluted to 0.800 M. What will be the final volume after dilution? Enter your

amm1812

Explanation:

The number of moles of solute present in liter of solution is defined as molarity.

Mathematically, Molarity = $\frac{\text{no. of moles}}{\text{Volume in liter}}$

Also, when number of moles are equal in a solution then the formula will be as follows.

$M_{1} \times V_{1} = M_{2} \times V_{2}$

It is given that $M_{1}$ is 8.00 M, $V_{1}$ is 7.00 mL, and $M_{2}$ is 0.80 M.

Hence, calculate the value of $V_{2}$ using above formula as follows.

$M_{1} \times V_{1} = M_{2} \times V_{2}$

$8.00 M \times 7.00 mL = 0.80 M \times V_{2}$

$V_{2} = \frac{56 M. mL}{0.80 M}$

= 70 ml

Thus, we can conclude that the volume after dilution is 70 ml.

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2 years ago

Atoms of a given element will have the same mass. (3 points) True False

Likurg_2 [28]

Answer:

false

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2 years ago

Lead has a density of 11.3 g/cm3. if you have 1.0 kg of lead, what is the volume in cubic centimeters (cm3)? remember to select

Novosadov [1.4K]

In this case, you are given the density( 11.3g/cm3) and the weight (1kg) of the lead. You are asked to find the volume of the lead.
To find volume you need to divide the weight with the density. It would be:
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volume = 1kg x (1000 gram/kg) / (11.3g/cm3)= 88.495 cm3

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3 years ago

Which of these is an example of an abiotic factor?

dolphi86 [110]

What are the choices? I'll answer once you tell me those

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5. For career day, Maria invited her uncle, an astronomer, to speak to her class about his boyhood

Sphinxa [80]

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B. Distance from earth. I'm pretty sure. From what I learned it should be that.

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2 years ago