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3 years ago

PLEASE HELP TIMED TEST

Chemistry

2 answers:

frozen [14]3 years ago

6 0

Answer:

C. BECAUSE ACCORDING TO THE LAW AND ORDER OF UNITED STATES IN THAT SAME YEAR IT WAS RESTRICTED TO BE 21 YEARS OR OLDER TO VOTE HOPE THIS HELPS

Explanation:

nirvana33 [79]3 years ago

4 0

Answer: c if im wrong then b if im wrong i dont know what to tell ya

Explanation:

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HELP PLEASE I LOVE YOU YOURE THE BEST :)

dusya [7]

Answer:

Explanation:

combine it all together

5 0

3 years ago

Choose the BEST answer from the four options A, B, C, or D: Due to which property of LPG are we asked to close the valve of the

Mama L [17]

Answer:

Explanation:

We are usually asked to close the valve of the gas cylinder in our various kitchens at home due to the inflammable property of the Liquified Petroleum Gas.

Without closing the valve, the LPG would diffuse into our homes, and any form of spark would cause an explosion and lead to a fire. Lives and properties could be lost in the process.

The correct option is A.

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3 years ago

Which of the following compounds contains the tin (IV) ion? A. SnO2 B. SnCl2 C. Sn2O D. Sn4O3

Zolol [24]

A. SnO2 is the correct answer. I hope this helps

3 0

3 years ago

Read 2 more answers

How many grams of aluminum are required to react with 35 mL of 2.0 M hydrochloric acid, HCl?__ HCl + __ Al --> __ AlCl3 + __

kiruha [24]

Answer:

0.6258 g

Explanation:

To determine the number grams of aluminum in the above reaction;

determine the number of moles of HCl
determine the mole ratio,
use the mole ratio to calculate the number of moles of aluminum.
use RFM of Aluminum to determine the grams required.

Moles of HCl

35 mL of 2.0 M HCl

2 moles of HCl is contained in 1000 mL

x moles of HCl is contained in 35 mL

$x \: mol \: = \: \frac{2 \: \times \: 35}{1000} \\ = 0.07 \: moles \:$

We have 0.07 moles of HCl.

Mole ratio

Balanced equation

6HCl(aq) + 2Al(s) --> 2AlCl3(aq) + 3H2(g)

Hence mole ratio = 6 : 2 (HCl : Al

but moles of HCl is 0.07, therefore the moles of Al;

$= \frac{2}{6} \times 0.07 \\ \: = 0.0233333 \: moles$

Therefore we have 0.0233333 moles of aluminum.

Grams of Aluminum

We use the formula;

$grams \: = moles \: \times \: rfm$

The RFM (Relative formula mass) of aluminum is 26.982g/mol.

Substitute values into the formula;

$= 0.0233333 \: moles \: \times \: 26.982 \: \frac{g}{mol} \\ = 0.625799 \: grams$

The number of grams of aluminum required to react with HCl is 0.6258 g.

3 0

2 years ago

How does the number of subatomic particles change as the carbon isotope decays?

Rzqust [24]

Answer:

Explanation:

C decays by a process called beta decay. During this process, an atom of 14C decays into an atom of 14N, during which one of the neutrons in the carbon atom becomes a proton. This increases the number of protons in the atom by one, creating a nitrogen atom rather than a carbon atom.

5 0

3 years ago