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Kay [80]
3 years ago
9

An element has an atmomic number of 68. The number of protons and electron in a neutral atom of the element are?

Chemistry
1 answer:
Bess [88]3 years ago
8 0

Answer:

Explanation:

An element whose atomic number is 68 (number Z), has 68 electrons and 68 protons. According to the periodic table it corresponds to the element Erbium (Er), whose mass number (A) is 167. The number of neutrons is 167-68 = 99.

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Describe how the height of the tides changes from Monday to Thursday.
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5 0
3 years ago
What kind of a bond is oc2
nexus9112 [7]

Answer:

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8 0
3 years ago
How many mL of 3.0M HCl are needed to make 300.0 mL of a 0.10M HCl?
nalin [4]

Answer:

V₁  = 10 mL

Explanation:

Given data:

Initial volume of HCl = ?

Initial molarity = 3.0 M

Final molarity = 0.10 M

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Solution:

Formula:

M₁V₁  =  M₂V₂

M₁ = Initial molarity

V₁  =  Initial volume of HCl

M₂ =Final molarity

V₂ = Final volume

Now we will put the values.

3.0 M ×V₁  =  0.10 M×300.0 mL

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V₁  = 30 M.mL /3.0 M

V₁  = 10 mL

3 0
3 years ago
C2H4(g) + H2(g) mc030-1.jpg C2H6(g) Which change would likely cause the greatest increase in the rate of the reaction?
Vinil7 [7]
The reaction is a hydrogenation reaction of an alkene, and its equation is:
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5 0
3 years ago
Read 2 more answers
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