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Mariana [72]
3 years ago
14

The world's tallest artificial Christmas tree measured a mammoth 5.20 x 103 cm. How tall is the tree in kilometers?​

Chemistry
1 answer:
Vlad [161]3 years ago
8 0

Answer:

0.005356

Explanation:

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slega [8]

Answer:

B is the correct answer I say

5 0
3 years ago
Read 2 more answers
Suppose 2.8 moles of methane are allowed to react with 5 moles of oxygen.
Ronch [10]

Answer : The limiting reagent is O_2

Solution : Given,

Moles of methane = 2.8 moles

Moles of O_2 = 5 moles

Now we have to calculate the limiting and excess reagent.

The balanced chemical reaction is,

CH_4+2O_2\rightarrow CO_2+2H_2O

From the balanced reaction we conclude that

As, 2 mole of O_2 react with 1 mole of CH_4

So, 5 moles of O_2 react with \frac{5}{2}=2.5 moles of CH_4

From this we conclude that, CH_4 is an excess reagent because the given moles are greater than the required moles and O_2 is a limiting reagent and it limits the formation of product.

Hence, the limiting reagent is O_2

8 0
3 years ago
This is hard, isn't it? please help me though. PLEASE
Liono4ka [1.6K]
I think it might be A. i am not totally sure though
6 0
2 years ago
Cellular respiration is ------- A) a chemical reaction. B) not needed to produce energy. C) a physical reaction. D) the same as
IgorC [24]

Answer:

A. Chemical Reaction

Explanation:

Cellular Respiration is the chemical reaction in which glucose and oxygen are turned into water, carbon dioxide, and energy.

5 0
3 years ago
PLEASE HELP CHEMISTRY QUESTION (picture attached)
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