3 years ago

I need help with these

Chemistry

1 answer:

Delvig [45]3 years ago

4 0

Answer:

9yuigyu need points sorry

Explanation:

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What is the meaning of 3 CO2 in a chemical reaction?

puteri [66]

Three is simply the coefficient which tells you the amount of molecules. In this case, there are three carbon dioxide molecules. If you want to break it down further, it also means there is three carbon atoms and six oxygen atoms.

I hope this helps.

7 0

3 years ago

When 6.0 mol Al react with 13 mol HCl, what is the limiting reactant, and how many moles of H2 can be formed? 2Al + 6HCl → 2AlCl

4vir4ik [10]

Well, we need to find the ratio of Al to the other reactant.

Al:HCl = 1:3

--> this means that for every 1 Al used, you have to use 3 HCl.

6*3 = 18 moles of HCl needed to fully react with 6 moles of Al. Since 13<18, HCL is the limiting reactant.

The ratio of HCl:AlCl = 3:1

13/3 = 4.3333...

The final answer is HCl is the limiting reactant with 4.3 moles of AlCl3 able to be produced.

Hope this helps!!! :)

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3 years ago

Which group of the periodic table contains two elements that are gases at stp?

Svetradugi [14.3K]

The group is might be labeled as VIIB or VIIA.

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3 years ago

Given the equation: 2H2 + O2 → 2H2O, how many moles of oxygen are needed to react with 13 moles of hydrogen

bulgar [2K]

Explanation:

2H2 + O2 = 2H2O

2mol. 1mol. 2mol

2mol reacts with 1mol

13mol reacts with x

x=13mol × 1mol

2mol

x= 13mol

2mol

x= 6.5mol of oxygen

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2 years ago

How many joules of heat are required to heat 131.0 grams of room temperature water (22 °C) to the boiling point?

vampirchik [111]

100.0g x 4.184J/g/°C x 78°C ΔT = 32,645.2 Joules.

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