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3241004551 [841]
3 years ago
11

The system brings molecules to the cells. It includes blood vessels and the heart.

Chemistry
1 answer:
makkiz [27]3 years ago
3 0
I think it’s the circulatory system. it delivers oxygen and nutrients to the cells and pumps blood to the heart. hope this helps:)
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An unknown element "x" can form a compound with the formula "x"br2. in which main group on the periodic table would element "x"
Hoochie [10]
Group 2, or in the Alkaline Earth Metals section. This is due to the necessity to have a +2 charge to balance out or negate the -2 charge two Bromines carry.
4 0
4 years ago
If you had excess chlorine, how many moles of of aluminum chloride could be produced from 25.0 g of aluminum? Express your answe
m_a_m_a [10]

Answer:

A. From 25,0 g of aluminium you will produce 0,927 moles of aluminium chloride

B. From 30,0 g of chlorine gas you will produce: 0,282 moles of aluminium chloride

Explanation:

a. The reaction that you have in this problem is:

3 Cl₂ + 2 Al → 2 AlCl₃

25,0 g of aluminium are:

25,0 ₓ\frac{1mole}{26,98g} = 0,927 moles

As Al:AlCl₃ ratio is 1, from 25,0 g of aluminium you will produce: <em>0,927 moles of aluminium chloride</em>

b. 30,0 g of chlorine gas are:

30,0 ₓ\frac{1mole}{70,90g} = 0,423 moles of Cl₂

As Cl₂:AlCl₃ ratio is ³/₂:

0,423 moles of Cl₂ ₓ \frac{2 molesAlCl_3}{3 molesCl_2} = <em>0,282 moles of aluminium chloride</em>

Thus, from 30,0 g of chlorine gas you will produce: <em>0,282 moles of aluminium chloride</em>

<em></em>

I hope it helps!

5 0
4 years ago
Ni4+ + _____e- LaTeX: \longrightarrow⟶ Nix+
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3 years ago
What is the mass (in grams) of 169 mole of CF4
Sergeu [11.5K]
The answer will depend on the number of significant figures you want in your answer, so I can't give you a solid answer, but the process is still the same: you convert from grams to moles by using the molar mass.

You can calculate the molar mass of carbon tetrafluoride from the periodic table, by adding the molar mass of 1 atom of C and 4 atoms of F. Round the total molar mass to the appropriate number and multiply 169 moles by the molar mass you just calculated.

Hope this helps!
3 0
4 years ago
Which molecule contains only single covalent bonds?<br>A CL<br>B CO2<br>C CN2<br>D 02​
andrey2020 [161]

CO2 i think if you understand so mark me as brainliest please.

4 0
3 years ago
Read 2 more answers
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