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Nookie1986 [14]

2 years ago

11

1 What is the total number of valence electrons in the Lewis structure of C104?

1 answer:

Lera25 [3.4K]2 years ago

8 0

There are 32 valence electrons for the Lewis structure for ClO4

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1 what do you understand by the term isotopes 2 why do I should talk of an element process identical chemical properties 3 name

Bad White [126]

Answer:

Isotopes of an element have same number of protons but different number of neutrons. Which means isotopes of an element have same atomic number but different mass number.

The chemical property of an element is determined by the number of electrons. And as all the isotopes have same number of electrons, they have same chemical properties.

Thus as isotopes of an element have same atomic number , they have same number of electrons and protons. As they have different mass number, the number of neutrons will be different. Hydrogen has three isotopes , $^1_1\textrm{H}$ , $^2_1\textrm{H}$ and $^3_1\textrm{H}$ . Thus $^1_1\textrm{H}$ has no neutron.

5 0

2 years ago

At 35 C, a sample of gas has a volume of 256 ml and a pressure of 720.torr. What would the volume

Natalija [7]

Answer: Volume would be 196.15 mL if the temperature were changed to $22^{o}C$ and the pressure to 1.25 atmospheres.

Explanation:

Given: $T_{1} = 35^{o}C = (35 + 273) K = 308 K$ , $V_{1}$ = 256 mL,

$P_{1}$ = 720 torr (1 torr = 0.00131579 atm) = 0.947368 atm

$T_{1} = 22^{o}C = (22 + 273) K = 295 K$ , $P_{2} = 1.25 atm$

Formula used to calculate volume is as follows.

$\frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}$

Substitute the values into above formula as follows.

$\frac{P_{1}V_{1}}{T_{1}} = \frac{P_{2}V_{2}}{T_{2}}\\\frac{1 atm \times 256 mL}{308 K} = \frac{1.25 atm \times V_{2}}{295 K}\\V_{2} = 196.15 mL$

Thus, we can conclude that the volume would be 196.15 mL if the temperature were changed to $22^{o}C$ and the pressure to 1.25 atmospheres.

4 0

2 years ago

Which of the following acts as a catalyst in your body? A. Sweat B. Enzymes C. Blood cells D. Sugar

Alenkasestr [34]

The answer is B. Enzymes.

Enzymes are biological catalysts that help cause reactions in your body.

3 0

3 years ago

B. 10% is the correct answer

GarryVolchara [31]

No the right answer is c

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2 years ago

Read 2 more answers

50 mph is a example of

Evgesh-ka [11]

The answer will be speed

3 0

3 years ago