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Darya [45]
3 years ago
8

How many atoms are in 187.6 grams of the alloy?

Chemistry
2 answers:
Ad libitum [116K]3 years ago
8 0
13 Al Aluminum Atomic mass 26.982
DerKrebs [107]3 years ago
4 0
26.982 is the answer
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A lead mass is heated and placed in a foam cup caloriemeter containing 40.0mL of water at 17.0 C. The water reaches a temperatur
Mrrafil [7]

the Answer is             502 Joules

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3 years ago
0.47 M KNO3 solution contains .757475 mol of KNO3 what is the volume
vfiekz [6]

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Volume is the quantity of three-dimensional  

Explanation:

7 0
3 years ago
A volume measured by a graduated cylinder that was marked in 100 mL
Natali [406]

The volume measured using such a cylinder will be reported to the nearest 10th mL.

<h3>Cylinder graduation</h3>

10 mL graduated cylinders are always read to the nearest two decimal places.

100 mL graduated cylinders are always read to the nearest 1 decimal place. The nearest 1 decimal place is the same thing as the nearest 10th.

Thus, a reading made using a 100mL increment graduated cylinder would be reported to the nearest 10th mL.

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8 0
2 years ago
When 8.0 moles of methanol are reacted with 9.0 moles of oxygen, how many moles of water vapor does the reaction produce?
nadya68 [22]

Answer:

12 moles of H₂O are formed in this combustion.

Explanation:

First of all, think the reaction:

2CH₃OH (l) +  3O₂ (g) →  2CO₂ (g) + 4H₂O (g)

Ratio in the reactants is 2:3, so 2 mol of methanol need 3 mol of oxygen to react. Then 8 mol of CH₃OH, will need (8.3)/2 = 12 moles of O₂

We have 9 moles of O₂, so this is the limiting reactant.

3 mol of oxygen produce 4 mol of water

Then, 9 mol of oxygen will produce ( 9 .4)/3 = 12 moles

3 0
3 years ago
ASAP
Nadya [2.5K]

Answer:

12 %

Explanation:

Produces 15 J of work for input 125 J

15/125 * 100% = 12%

5 0
2 years ago
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