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larisa86 [58]
3 years ago
8

which of the following occurs when an electron moves from a higher energy shell to a lower energy shell

Chemistry
1 answer:
MA_775_DIABLO [31]3 years ago
8 0
1 Some kind of light is emitted for each element when it is moved from higher energy level to lower energy level
2 Also some of energy is absorbed which is being used to move electrons from high energy level to lower energy level
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Foods that are basic can be identified by what taste
xz_007 [3.2K]

Answer:

Foods that are basic can be identified by its bitter taste. Option C

6 0
3 years ago
what is the total number of grams of NaOH needed to react completely with 196 grams of H2 SO4? regents
8090 [49]

Answer:

160 g

Explanation:

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

For H_2SO_4:-  

Mass of H_2SO_4 = 196 g

Molar mass of H_2SO_4 = 98 g/mol

The formula for the calculation of moles is shown below:

moles = \frac{Mass\ taken}{Molar\ mass}

Thus,

Moles= \frac{196\ g}{98\ g/mol}

Moles\ of\ Sulfuric\ acid= 2\ mol

According to the given reaction:

2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O

1 mole of sulfuric acid reacts with 2 moles of NaOH

So,  

2 moles of sulfuric acid reacts with 2*2 moles of NaOH

Moles of NaOH must react = 4 moles

Molar mass of NaOH = 40 g/mol

<u>Mass = Moles*molar mass = 4\times 40\ g = 160 g</u>

3 0
4 years ago
Nitrogen has an atomic number of 7; therefore, it has _____ electrons in its outermost electron shell
rosijanka [135]
B.5 as the electronic configuration is 2.5. 2 on the first shell abd 5 on the valency or most outer sgell.
5 0
3 years ago
What does relative abundance mean
fgiga [73]
Relative<span> species </span>abundance<span> is a component of biodiversity and refers to how common or rare a species is </span>relative<span> to other species in a defined location or community. </span>Relative abundance<span> is the percent composition of an organism of a particular kind </span>relative<span> to the total number of organisms in the area.

I don't know if your looking for this exact definition so i'm sorry if i'm wrong

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4 0
3 years ago
C. A 75 lb (34 kg) boy falls out of a tree from a height of 10 ft (3 m). (3 points)
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(I) kinetic energy of the boy when he hits the ground =potential energy

I. e ½mv²=mgh where g is 10ms-²

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=34×10×3

=1020j

(i i) v²=u²+2gh

v²=0²+2×10×3

= 60

v=sqrt of 60

7 0
2 years ago
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