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4 years ago

8

You run to your girlfriend's house and announce that you were running at a rate of 15 miles per hour. She knows this is not true

because she knows

1 answer:

anygoal [31]4 years ago

3 0

It is impossible to run 15 miles an hour

I think

Hope this helps :D

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7th grade help me plzzzz

Flauer [41]

Answer: I think it’s compounds only

Explanation:

6 0

3 years ago

What mass of carbon dioxide could be made from 100 tonnes of calcium carbonate?

MA_775_DIABLO [31]

Total mass of CaCO3 = 40 amu of Ca + 12amu of C + 16×3 amu of oxygen = 100amu of CaCO3

i.e 100 tonnes of CaCO3 .

mass of CO2 = 12amu of C + 2× 16amu of O = 44 amu of CO2

mass % of CO2 in CaCO3 = (44/100)×100 =44%

i.e
44% of 100 tonnes is CO2.
=44 tonnes of CO2.

therefore, 44% of CO2 is present in CaCO3.

3 0

3 years ago

A sample in lab displaces 15 mL of water in a graduated cylinder. When placed on a scale the mass is 8.7 g. What is the density

Natasha2012 [34]

Answer:

<h2>0.58 g/mL</h2>

Explanation:

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

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

From the question

volume = 15 mL

mass of object = 8.7 g

We have

$Density = \frac{8.7}{15}$

We have the final answer as

<h3>0.58 g/mL</h3>

Hope this helps you

4 0

3 years ago

Calcium + nitrous acid → calcium nitrite<br> +<br> nitrogen monoxide<br> + water

erastovalidia [21]

Answer:

It is double displacement reaction

5 0

3 years ago

What is the difference between an atom and a compound?

puteri [66]

An atom cannot be broken down any smaller whereas a compound is made up of atoms and can be broken down into smaller pieces (the individual atoms that make it up)
Hope this helps!

6 0

4 years ago

Read 2 more answers