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2 years ago

Which pulley system will allow the armchair to be lifted with the least amount of effort?

Chemistry

2 answers:

lyudmila [28]2 years ago

7 0

ANSWER:

I think it's C

Explanation:

I just learned about this in science class and I'm pretty sure you need 2 pulleys to make it easier to pull

guapka [62]2 years ago

5 0

Answer:

Option D.

Explanation:

Option D. Since tension experimented by the rope is equal to one sixth of the weight of armchair.

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19. What is sthe mass of 6.02 x 1024 atoms

alekssr [168]

The mass of magnesium in $6.02 \times 10^{24}$ atoms is 240 g.

Answer: Option A

Explanation:

First, we have to convert the atoms to moles of magnesium.

We know that $6.02 \times 10^{24}$ atoms are present in 1 mole of magnesium. So,

$\text { 1 atom }=\frac{1}{6.02 \times 10^{24}} \text { moles }$

$6.02 \times 10^{24} \text { atoms }=\frac{6.02 \times 10^{24}}{6.02 \times 10^{23}} \text { moles }=10 \text { moles }$

Thus,

$Mass of M g= molar mass of M g \times No. of moles of M g$

$\text { Mass of } M g=24 \times 10=240 g$

Thus, 240 g of Magnesium is present in $6.02 \times 10^{24}$ atoms.

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2 years ago

How do you know when a solution is saturated? _____________________________________________________ When a solution is saturated

mote1985 [20]

Answer:

If more solute is added and it does not dissolve, then the original solution was saturated

If more solute is added and it does not dissolve, then the original solution was saturated. If the added solute dissolves, then the original solution was unsaturated. A solution that has been allowed to reach equilibrium but which has extra undissolved solute at the bottom of the container must be saturate

Explanation:

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3 years ago

Which letter in the diagram represents the transition from liquid to gas? A B C D

xxMikexx [17]

Answer:

Explanation:

B is solid and liquid while D is liquid and gas

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2 years ago

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Anna007 [38]

Answer:

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Explanation:

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Answer:

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2 years ago