All categories

3 years ago

All atomic nuclei, except those of ordinary hydrogen, contain neutrons. a. True b. False

Chemistry

2 answers:

ozzi3 years ago

4 0

This would be false

balandron [24]3 years ago

4 0

This would be False and I'm almost positive

You might be interested in

When 25.0 grams of FeO react with 25.0 grams of Al, how many grams of Fe can be produced?

densk [106]

Answer: 77.7g

Explanation:Please see attachment for explanation

4 0

3 years ago

A common anesthetic in dentistry known as nitronox consists of a mixture of dinitrogen oxide, n2o, and oxygen gas, o2, which is

Nesterboy [21]

Anesthetic in dentistry consists of a mixture of dinitrogen oxide (N₂O) and oxygen gas (O₂), which is administered through an inhaler over the nose. Total pressure of the mixture ( $P_{total}$ ) is sum of partial pressure of N₂O ( $p_{N_{2}O }$ ) and partial pressure of O₂, ( $p_{O_{2} }$ ).

$P_{total}=p_{N_{2}O } + p_{O_{2} }$

$P_{total}= 740 mmHg, p_{O_{2} }$ =370 mmHg

So, $p_{N_{2}O }$ = (740-370) mmHg= 370 mmHg=370 torr

Hence, partial pressure of N₂O is 370 torr.

As, 1mmHg= 1 torr.

3 0

3 years ago

Which is most likely true about electronegativity?

VikaD [51]

Electronegativity is the tendency of an element to attract the bonded electrons towards itself. In a group, as the atomic radius increases electronegativity decreases as the outermost electron is far away from the nuclear attraction. In a period, the atomic size decreases. So, the effective nuclear charge experienced by the outermost shell increases. Therefore, across a period the electronegativity increases as the increased effective nuclear charge leads to the attraction of bonded electrons with greater ease.

Therefore the correct answer is <u>c</u>, electronegativity tends to increases across a period.

8 0

3 years ago

Two unknown molecular compounds were being studied. A solution containing 5.00 g of compound A in 100. g of water froze at a low

Shtirlitz [24]

Answer:

Compound B.

Explanation:

The freezing point depression is a colligative property. It depends on the number of particles (moles) present in the solution.

$\Delta T_{\text{f}} = K_{\text{f}} b$

where b is the molal concentration

$b = \dfrac{\text{moles of solute}}{\text{kilograms of solvent}}\\\\n = \dfrac{\text{mass}}{\text{molar mass}} = \dfrac{m}{M}$

If m is constant (5 g), then

$n \propto \dfrac{1}{M}$

The compound with the greater molar mass has fewer moles and therefore fewer particles to depress the freezing point.

That must be Compound B, because Compound A has the lower freezing point.

7 0

3 years ago

I will mark brainlyiest

Katena32 [7]

Answer:

Do you want someone to go through and answer all of these questions??

Explanation:

I am on the dox, but idk if I could finish it fast enough to put the link in here. Is there a way to delete answers?

6 0

3 years ago