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Anestetic [448]
3 years ago
10

Please help if you can.

Chemistry
1 answer:
IrinaVladis [17]3 years ago
3 0

Answer: i thought i knew but nver mind but on the last won it is c i belive

Explanation:

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chemistry moles PLEASE HELP!! A package of foil weighs 360g. How many moles of aluminium are there in this package??
Ksenya-84 [330]

Answer:

I am not 100% sure but I think it is 26.981538

Explanation:

6 0
2 years ago
An objective that revolves around a planet is...<br><br> A) star<br> B) moon<br> C)dwarf planet
Evgen [1.6K]

Answer:

B. Moon

Explanation:

An object revolving around a star is a planet or a dwarf planet (dependent on size).

An object revolving around a planet is a moon.

An object revolving around a black hole is a goner.

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Explain how ideas about the atom have changed over time.<br><br> 22 POINTS FOR A GOOD ANSWER !!!
Alex777 [14]
At first we thought atoms were just electrons and were negatively charged, but now we’ve learned that is can create different and many more substances.
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2 years ago
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What amount of the excess reagent remains when 0.30 mol NH3 reacts with 0.40 mol O2 to produce NO and H2O? 4NH3 +502 + 4NO + 6H2
nirvana33 [79]

Answer: (D) 0.025 mol O_2

Explanation:

The given balanced equation is :

4NH_3+5O_2\rightarrow 4NO+6H_2O

According to stoichiometry :

4 moles of ammonia (NH_3) reacts with = 5 moles of oxygen (O_2)

Thus 0.30 moles of  ammonia  (NH_3)  reacts with = \frac{5}{4}\times 0.30=0.375 moles of oxygen (O_2)

Now as given moles of oxygen are more than the required amount, oxygen is the excess reagent.

moles of oxygen (O_2) left = 0.40 - 0.375 = 0.025

Thus 0.025 mol O_2 excess reagent remains.

7 0
2 years ago
When 189.6 g of ethylene (C2H4) burns in oxygen to give carbon dioxide and water, how many grams of CO2 are formed?
Andreyy89

Answer:

6.76 g

Explanation:

3 0
3 years ago
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