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OverLord2011 [107]
3 years ago
12

When balancing a chemical reaction what are the small numbers that we do not change?

Chemistry
1 answer:
Phoenix [80]3 years ago
6 0

Answer:

Subscripts

Explanation:

Example:

H2O

2 is the subscript and does not change  

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When copper(II) oxide is heated with hydrogen gas, water and copper metal is produced. What mass of copper can be obtained if 32
Vadim26 [7]

Answer:

25.5 g

Explanation:

First, you will need a balanced chemical equation

CuO  +  H₂  ==>  H₂O  +  Cu

From the equation above, we can see that for every 1 mole of CuO (copper(II) oxide), 1 mole of Cu (copper) is produced.  

Convert grams of CuO to moles.  You should get 0.402 mol.  Now with the relationship established above, you can see that you should ideally get 0.402 mol.  Convert this to grams.  Your answer should be 25.5 g.

8 0
3 years ago
When water vapor cools it condenses select the number that represents this process on the diagram
TiliK225 [7]
2 is the correct answer.
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4 years ago
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Does somebody know the answer ?
Alex777 [14]
H2O is the missing reactant.

Just a caveat: this equation isn’t balanced.
3 0
3 years ago
Mass transfer rate in convection is ..... mass transfer in conduction
lana66690 [7]

Answer:

(a) more than

Explanation:

Conduction:

Transfer of heat due to direct contact between two mediums at different temperatures, without having any of the bodies traveling. Therefore, conduction heat transfer occurs by the transfer of momentum (molecular) from always the same group of molecules in one medium to another group of molecules in another medium.

Example: Heat transfer INSIDE a solid.

Convention:

Transfer of heat or mass due to at least one traveling medium, where the transfer of momentum is not bounded anymore to the same groups of molecules. Molecules moving to transfer their momentum and keep flowing to the next group, also allowing other molecules behind to do the same. Example: heat transfer by the wind.

Hence, the Mass transfer rate in convection is <u>more than</u> mass transfer in conduction

6 0
3 years ago
Which of the following ranks the redox-active species of the electron transport chain in order of decreasing electron affinity?
N76 [4]

Answer:

d. O2 > CoQ > FAD > NAD+

Explanation:

O2 > CoQ > FAD > NAD+

Because the reason is O2 is the last electron acceptor in the chain for a reason. FAD is also introduced later in the ETC(Electron transfer chain) than NAD+ and generates less ATP.

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3 years ago
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