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3 years ago

The general term used by archaeologists for a pin that was used in holding a garment together is the roman word ________.

1 answer:

6 0

<span>The general term used by archaeologists for a pin that was used in holding a garment together is the roman word Fibula.
</span>The term Fibula refers to Roman brooches, but also denotes<span> brooches from the entire ancient </span> period.

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Which subatomic particle of an atom never changes?

AlexFokin [52]

Protons are one of the fully stable parts of matter

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3 years ago

5. What are the relative rates of diffusion for methane, CH, and oxygen, O2? If O2 la travels 1.00 m in a certain amount of time

11Alexandr11 [23.1K]

Answer:

The relative rates of diffusion for methane and oxygen is 1.4142.

Methane gas will be able to travel 1.4142 meter in the same conditions.

Explanation:

To calculate the rate of diffusion of gas, we use Graham's Law.

This law states that the rate of effusion or diffusion of gas is inversely proportional to the square root of the molar mass of the gas. Mathematically written as:

$\text{Rate of diffusion}\propto \frac{1}{\sqrt{\text{Molar mass of the gas}}}$

We are given:

Molar mass of methane gas, m = 16 g/mol

Molar mass of oxygen gas,m' = 32 g/mol

By taking their ratio, we get:

$\frac{d_{CH_4}}{d_{O_2}}=\sqrt{\frac{m'}{m}}$

$\frac{d_{CH_4}}{d_{O_2}}=\sqrt{\frac{32}{16}}=1.4142$

The relative rates of diffusion for methane and oxygen is 1.4142.

If oxygen gas travels 1 meters in time t.

Rate of diffusion of oxygen = $d_{O_2}=\frac{1 m}{t}$

If methane gas travels travels in y meters in time t.

Rate of diffusion of methane= $d_{CH_4}=\frac{y }{t}$

$\frac{d_{CH_4}}{d_{O_2}}=\frac{\frac{y }{t}}{\frac{1 m}{t}}=1.4142$

y = 1.4142 m

Methane gas will be able to travel 1.4142 meter in the same conditions.

8 0

3 years ago

The measurement 3.8 x 10^3 g could also be written as

solmaris [256]

Right now it's written in scientific notation, so you can just move the decimal place in 3.8 to the right 3 times (as it is times 10 to the third power) to get 3,800g.

5 0

2 years ago

Read 2 more answers

1. Select all the statements about the nucleus of the atom that are correct:

erik [133]

Answer:

Explanation:

1. Select all the statements about the nucleus of the atom that are correct:

Group of answer choices

B. It contains Protons

D. It has a Positive Charge

E. It contains Neutrons

2. An atom of an element with atomic number 50 and mass number 120 contains:

Group of answer choices

B. 50 protons, 50 electrons, and 70 neutrons

3. Which of these statements is false?

Group of answer choices

D. Electrons have the same mass as a proton but have the opposite charge.

8 0

2 years ago

What is the molar concentration (molarity) of 1.0 mol of KCl dissolved in 750 mL of

Nikolay [14]

Answer:

Molarity is moles per liter. You have one mole in 0.750 liters

Explanation:

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2 years ago