So its not A so its B C or D plz help

Match these items. 1. smallest unit of an element 2. original site of alchemy 3. consists of only one substance 4. good conducto

pychu [463]

1. Atom, 2. Alexandria, 3. Element, 4. Metals, 5. Nonmetals, 6. Compound

6 0

3 years ago

A student collects 629ml of oxygen at 0.500at, the student collected 0.0337 moles. At what temperature did the student collect t

VashaNatasha [74]

Answer:

114 K

Explanation:

Given data

Volume of oxygen (V): 629 mL = 0.629 L

Pressure of oxygen (P): 0.500 atm

Moles of oxygen (n): 0.0337 mol

Temperature (T): ?

We can calculate the temperature at which the student collected the oxygen using the ideal gas equation.

$P \times V = n \times R \times T\\T = \frac{P \times V}{n \times R} = \frac{0.500atm \times 0.629L}{0.0337mol \times 0.0821atm.L/mol.K} = 114 K$

The oxygen gas was collected at 114 K.

4 0

2 years ago

Read 2 more answers

A gas has a volume of 6.35 L at 88.6 kPa. What will be the volume at standard pressure? Standard Pressure = 101.3 kPa

alukav5142 [94]

Answer:

5.55 L

Explanation:

This excersise can be solved by the Boyle's law.

This law for gases states that the pressure of a gas in a vessel is inversely proportional to the volume of the vessel.

P₁ . V₁ = P₂ . V₂

The law comes from the Ideal Gases Law, in the first term.

P . V = n . R . T In this case, n . R . T are all constant.

6.35 L . 88.6 kPa = 101.3 kPa . V₂

V₂ = (6.35 L . 88.6 kPa) / 101.3 kPa

V₂ = 5.55 L

It is inversely proportional because, as it happened in this case, pressure was increased, therefore volume decreased.

5 0

3 years ago

What is the wavelength of radio waves? Which statement is true for a cooling curve? A. It shows how the temperature of the subst

ladessa [460]

Answer:

Most radio waves have wavelengths between 1 mm and 100 km.

A cooling curve shows A. how the temperature of a substance falls as heat is removed.

Explanation:

Radio waves are the longest of all the waves in the electromagnetic spectrum.

Most have wavelengths between 1 mm and 100 km, although there is no upper limit.

Some radio waves have wavelengths of 10 000 km.

A cooling curve (see image below) shows how the temperature of a substance falls as it is cooled.

In Option E., a decrease in temperature would cause an energy loss.

Options B., C., and D. involve the addition of heat.

5 0

3 years ago

In a sample of liquid water (H2O), which property differs among the water molecules?

garik1379 [7]

In a sample liquid water, a property that differs among the water molecules is its own orientation and space. The explanation of the answer to the question is because the number of the oxygen and hydrogen atoms and the hydrogen and atoms’ arrangement will never change and will always be the same for each of the water molecule. The strength of the bond of it also does not change and stays the same.

3 0

3 years ago