4 years ago

Bacteria are smaller than viruses.TrueFalse

Chemistry

1 answer:

skelet666 [1.2K]4 years ago

3 0

Answer:

false

Explanation:

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When 2.35 g of potassium reacts with excess water, what mass of hydrogen gas is formed?

Butoxors [25]

Answer:

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3 years ago

calculate the volume of a rectangular prism with a length of 5.6cm, a width of 2.1cm, and a height of 6.6cm

Rus_ich [418]

The volume of a prism is base times height so it should be 5.6 times 2.1 times 6.6 which gives us 77.616cm^3

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3 years ago

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A student needs to prepare 100. mL of 0.612 M Cu(NO3)2 solution. What mass, in grams, of copper(II) nitrate should the student u

Temka [501]

Answer: 11.5 grams

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution

$Molarity=\frac{n\times 1000}{V_s}$

where,

Morality = 0.612 M

n= moles of solute

$V_s$ = volume of solution in ml = 100 ml

Now put all the given values in the formula of molarity, we get

$0.612=\frac{n\times 1000}{100ml}$

$n=0.0612moles$

$Mass={\text {moles of solute }}{\times {\text {molar mass}}=0.0612moles\times 187.56g/mol=11.5g$

Therefore, the mass of copper (II)nitrate required is 11.5 grams

3 0

3 years ago

What is the density of a sample of a substance with a volume of 120ml<br> and a mass of 90g?

tigry1 [53]

Answer:

<h3>The answer is 0.75 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

From the question

mass = 90 g

volume = 120 mL

We have

$density = \frac{90}{120} = \frac{9}{12} = \frac{3}{4} \\$

We have the final answer as

Hope this helps you

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3 years ago

If a man has a mass of 83 kilograms on Earth, what will the force of gravity on his body be on the moon? A. 135.6 N B. 318.5 N C

diamong [38]

First, we need to know what's the gravity value in the moon. it is 1.622 m/ s2

to find the force, let's recall this formula----> Force= mass x gravity

force= 83 kg x 1.622= 134.6

A is the closest choice.

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4 years ago

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Bacteria are smaller than viruses.TrueFalse​

Bacteria are smaller than viruses.TrueFalse