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kogti [31]
2 years ago
11

What is the electron configuration for helium (He)? O 1s¹ O 1s² O 1s²2s¹ O 1s²2s²

Chemistry
1 answer:
NeX [460]2 years ago
8 0
It should be the second one
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when 57.0 g copper are reacted with silver nitrate solution, 138g of silver are obtained. what is the percent yield of silver ob
maks197457 [2]

Answer:

86.96

Explanation:

5 0
2 years ago
9.
siniylev [52]

Answer:

C. the boiling point of water

Explanation:

B is correct because boiling point only usually differs among the same substance when pressure changes. So say you take one solution onto a mountain top and another at sea level, the boiling point will not be the same, but here we assume they are in the same place so it won't.

A cannot be because the containers are all different shapes (and we aren't talking about like molecular shape of water from what I assume, we mean macroscopically, so that can't be).

B cannot be because we have 4 different temperatures.

D cannot be because we have 4 different temperatures, and therefore different amounts of steam will be released per minute as not all the waters have reached boiling.

3 0
3 years ago
The bonds S-S, O-H and Ca-Cl are, respectively, a) nonpolar covalent, polar covalent, ionic polar covalent, b)nonpolar covalent,
Brums [2.3K]

Answer:

nonpolar covalent, polar covalent, ionic

Explanation:

From the question ,

S - S Bond -

Both the atom are same , hence , making a non polar bond , because of no difference between the electronegativity of the atom ,

Hence , the S-S Bond is non polar covalent bond .

O-H bond -

The Oxygen atom is more electronegative than the hydrogen atom , so the bond is polar in nature .

And as the bond is formed by sharing ,

Therefore ,

O-H bond is polar covalent bond .

Ca-Cl bond -

Calcium is a metal , whereas , Chlorine is a non - metal , the bond is ionic in nature ,

Hence , Ca-Cl bond is  ionic  in nature .

7 0
3 years ago
Graphene is made of pure _______________.
telo118 [61]

Answer:

Graphene is made of pure carbon.

Explanation:

It is a material in which the carbon atoms are arranged in a single layer, creating a honeycomb pattern. It should be stressed that this layer of carbon is only one atom thick, although some authors consider up to ten layers of carbon to be graphene.

please mark me brainliest

4 0
3 years ago
Read 2 more answers
Convert 1.3902 hectoliters to centiliters.
hram777 [196]
<span>The answer is 13,902 centiliters.

</span>
8 0
4 years ago
Read 2 more answers
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