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2 years ago

BRAINLIESTTT ASAP!! PLEASE HELP ME ASAP!

Chemistry

1 answer:

Alexandra [31]2 years ago

4 0

Answer:

Single displacement and reduction

Explanation:

In a single-displacement reaction, one element exchanges partners with another.

$\rm Ca + 2H$_2$O $\longrightarrow$ Ca(OH)$_2$ + H$_2$$

This is a single-displacement reaction, because the element Ca exchanges partners with H.

This is also a reduction/oxidation (redox) reaction, because the optically active of Ca increases from 0 to +2 (oxidation), while the oxidation number of H decreases from +1 to 0 (reduction),

The most common types of reactions are:

Combination
Decomposition
Single displacement
Double displacement
Reduction/oxidation

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ololo11 [35]

Answer:

Explanation:

7 0

2 years ago

How many moles are in 8.35 g of H2O?

AlexFokin [52]

It’s is 130 that is the answer!!!!

8 0

1 year ago

someone pls help me with my chemistry test plsss my teacher changes the questions so I can't search them up. its 21 questions so

shusha [124]

Answer:

Correct option is

5 liters of CH

(g)NO

at STP

No. of molecules=

22.4

mol=

22.4

×N

molecules

A) 5ℊ of H

(g)

No. of moles=

mol=

×N

molecules

B) 5l of CH

(g)

No. of moles of CH

22.4

mol=

22.4

molecules

C) 5 mol of O

=5N

molecules

D) 5×10

molecules of CO

(g)

Molecules of 5l NO

(g) at STP=5l of CH

(g) molecules at STP

Therefore, option B is correct.

7 0

2 years ago

Nitrogen has an average atomic mass of 14.00674. it has two isotopes, n-14 and n-15, with atomic masses of 14.0031 amu and 15.00

masya89 [10]

In this case, we are going to assume that there are 100 atoms to make things easier.

Let R% be the abundance of n-15. With this in mind, we calculate the abundance of n-14 to be 100%-R%

14.0031*(100-R)% + 15.001 * R%= 14.00674
In this case, we can delete or ignore the % sign since we do not want to carry it around, however, we need to keep in mind that the final answer is in %

14.0031*(100-R) + 15.001 * R= 14.00674
1400.31-14.0031R+15.001R=1400.674
0.9979R=0.364
R=0.3648

Then, the abundance of n-15 is 0.3648%

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2 years ago

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WITCHER [35]

Answer:

cryptic biodiversity

Explanation:

8 0

2 years ago