All categories

3 years ago

Chemistry Question! 20 Points!

Chemistry

1 answer:

Delvig [45]3 years ago

7 0

Answer:

Explanation:

I guess it's a, because nuclear decay is likely to occur when either the mass or atomic number is greater than 83.

You might be interested in

Natalie observes these characteristics in the model of an atom.

PilotLPTM [1.2K]

An atoms consists of protons, electrons and neutrons. Protons are positively charged while electrons are negatively charged. Both are electrically attracted to each other. Meanwhile, the neutrons are electrically neutral which do not have a charge. This means that neutrons are neither electrically attracted to the protons nor electrons,

4 0

3 years ago

At certain times during the process, the temperature increased. During these times, the heat that was absorbed took the form of

Ann [662]

Answer: kinetic, move faster, potential, change form

Explanation:

5 0

3 years ago

What is the chemical symbol for the starting substance 2nacl+2h2o->2naOH+cl2+h2

ruslelena [56]

He symbol "=" is used to
starting substance

6 0

3 years ago

What is the phase change in which a substance changes from a gas to liquid? a

Irina-Kira [14]

Answer:

Usually the answer to this kind of question would be Condensation

Explanation:

You feel me my Guy...

8 0

2 years ago

Read 2 more answers

Assume the volume of the crew cabin is 74,000 L. The pressure is maintained at around 1.00 atm, ideally with an 80% nitrogen and

hjlf

Answer:

The number of moles of oxygen present in the crew cabin at any given time is 615.309 moles

Explanation:

The given parameters are;

Volume of the crew cabin = 74,000 L

Pressure of the crew cabin = 1.00 atm

Percentage of nitrogen in the mixture of gases in the cabin = 80%

Percentage of oxygen in the mixture of gases in the cabin = 20%

Temperature of the cabin = 20°C = 293.15 K

Therefore, volume of oxygen in the crew cabin = 20% of 74,000 L

Hence, volume of oxygen in the crew cabin = $\frac{20}{100} \times 74,000 \, L = 14,800 \, L$

From the universal gas equation, we have;

$n = \frac{P \times V}{R \times T}$

Where:

n = Number of moles of oxygen

P = Pressure = 1.00 atm

V = Volume of oxygen = 14,800 L

T = Temperature = 293.15 K

R = Universal Gas Constant = 0.08205 L·atm/(mol·K)

Plugging in the values, we have;

$n = \frac{1 \times 14,800 }{0.08205 \times 293.15 } = 615.309 \, moles$

The number of moles of oxygen present in the crew cabin at any given time = 615.309 moles.

3 0

3 years ago