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Yuliya22 [10]
3 years ago
14

What is the matter of science​

Chemistry
1 answer:
weqwewe [10]3 years ago
3 0
The finagling in the hole
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What is the molar mass for a gas that effuses 0.344 times as fast as hydrogen gas?
Leona [35]
Rate of effusion gas/rate of effusion H2   =    √(M(H2))/√(M(gas))
0.344= √2/√(M(gas))
√(M(gas))= √2/0.344
M(gas)= (√2/0.344)² =2/(0.344)² ≈16.9
3 0
4 years ago
What is penetration? How is it related to shielding? Use the penetration effect to explain the difference in relative orbital en
Whitepunk [10]

Answer: penetration is the ability of an electron in a given orbital to approach the nucleus closely. Shielding refers to the fact that core electrons reduce the degree of nuclear attraction felt by the orbital electrons. Shielding is the opposite of penetration. The most penetrating orbital is the least screening orbital. The order of increasing shielding effect/decreasing penetration is s<p<d<f.

Explanation:

The order of penetrating power is 1s>2s>2p>3s>3p>4s>3d>4p>5s>4d>5p>6s>4f....

Since the 3p orbital is more penetrating than the 3d orbital, it will lie nearer to the nucleus and thus possess lower energy.

5 0
3 years ago
In step 2 of the experimental procedure, you added 6 M sodium hydroxide to the copper(II) nitrate solut form copper(II) hydroxid
kicyunya [14]

Answer:

The solution becomes colorless and a light blue precipitate is formed.

Explanation:

When sodium hydroxide is added to copper(II) nitrate solution, a precipitate of  copper(II) hydroxide is formed.

The solution gradually becomes colorless as the light blue precipitate appears.

The reaction is complete (enough sodium hydroxide has been added) when the blue color of the solution completely disappears.

The equation of the reaction is;

Cu(NO3)2(aq) + 2NaOH(aq) → Cu(OH)2(s) + 2NaNO3(aq)

4 0
3 years ago
Because Mg and O2 are both elements, no bonds were broken during the formation of MgO.
masya89 [10]

Answer:

false

Explanation

The chemical bonds were broken when creating the compound MgO.

4 0
3 years ago
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A car driving east along the freeway at 60 m/s hits some traffic and after 7 seconds is
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Do u know how to solve area
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