2 years ago

?!!??!!!!!!!!!!!!!HELPPPPPPPPP

Chemistry

2 answers:

Fynjy0 [20]2 years ago

8 0

I think it’s tt hope this helps

Mademuasel [1]2 years ago

5 0

I’m pretty sure it’s tt?

You might be interested in

True or false, cilia and mucus help keep our lungs clean and healthy?

fiasKO [112]

Answer:

It does. They trap particles so they don’t enter.

Explanation:

6 0

3 years ago

How many millimeters of 1.58 M HCl are needed to react completely with 23.2 g of NaHCO3

KonstantinChe [14]

<span>So we need 0.276 moles of HCl to react. Your concentration is given in moles/liter so 0.276/1.58 = 0.174 liters needed or 174 milliliters</span>

8 0

3 years ago

Read 2 more answers

Which of the following is true about two neutral atoms of the element gold? (1 point) The nucleus is missing in both. Each has a

klio [65]

i have the same question idk the anwser tho

5 0

2 years ago

Nitrogen dioxide is a red-brown gas responsible for the brown color of smog. A container of nitrogen dioxide that is at low pres

____ [38]

Answer:

Initially $1.51\times 10^{-2} moles$ of nitrogen dioxide were in the container .

Explanation:

Volume of the container at low pressure and at room temperature = $V_1=3.4 L$

Number of moles in the container = $n_1$

After more addition of nitrogen gas at the same pressure and temperature.

Volume of the container after addition = $V_2=5.11 L$

Number of moles in the container after addition= $n_2=2.28\times 10^{-2} mol$

Applying Avogadro's law:

$\frac{Volume}{Moles}=constant$ (at constant pressure and temperature)

$\frac{V_1}{n_1}=\frac{V_2}{n_2}$

$n_1=\frac{V_1\times n_2}{V_2}=\frac{3.4 L\times 2.28\times 10^{-2} mol}{5.11 L}$

$n_1=1.51\times 10^{-2} mol$

Initially $1.51\times 10^{-2} moles$ of nitrogen dioxide were in the container .

8 0

3 years ago

The information below is a description of a substance:

skelet666 [1.2K]

Answer:

A chemical change

Explanation:

7 0

3 years ago