2 years ago

How many molecules are 0.5000 miles of H2?

1 answer:

4 0

1 mol of wager contains 6.002 * 1023 H2O molecules. Therefore, 0.500 mol contains 0.5000 * (6.022*1023)=3.01*1023 H2O molecules.

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Suppose you throw a cube-shaped object and a spherical-shaped object of equal volume in the same volume of water. The ball sinks

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I am pretty sure the answer is B but correct me if I'm wrong hope this helps.

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2 years ago

One type of bacteria reproduces once every 60 minutes. If there are 2 bacterial cells to begin with, then after 4 hours there wi

dlinn [17]

Answer:
Solving by the method of exponential growth.
bacteria = 2
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2 years ago

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Which of the following is not an external force that acts on rocks in the rock cycle? A) wind B) pressure C) ice D) water

miss Akunina [59]

Wind isn’t an external force that acts in the rock cycle.

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2 years ago

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Given the following balanced chemical reaction:

Gnom [1K]

Answer:

Explanation:

according to balance chemical equation

3 A2 moles produced 2 moles of A3B

so 12 moles A2 will produced moles of A3B= 12*2/3=24/3= 8

therefore 12 moles of A2 produced 8 moles of A3B

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2 years ago

A chemistry teacher is able to grade chemistry labs at a rate of 5 labs for every 3 minutes. They need to grade 165 labs how man

PIT_PIT [208]

Answer:

1.65hr

Explanation:

Given parameters:

Number of labs = 5 labs

Time taken = 3 minutes

Unknown:

Time taken in hours to grade 165 labs = ?

Solution:

Let us find the rate of the teacher;

Rate = $\frac{number of labs}{time}$

Insert the parameters and solve;

Rate = $\frac{5}{3}$ = 1.67labs/min

Now;

Time to grade 165 labs = $\frac{number of labs}{rate}$

Time to grade 165 labs = $\frac{165}{1.67}$ = 98.8min

Since;

60min = 1hr

98.8min = $\frac{98.8}{60}$ = 1.65hr

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2 years ago