All categories

3 years ago

Which best describes the mass realationships between protons, neutrons, and electrons?

Chemistry

1 answer:

stepan [7]3 years ago

7 0

B because protons and neutrons both weigh 1 amu whereas electrons weigh practically nothing.

You might be interested in

The density of mercury is 13.6 g/cm3, What is its density in mg/mm3?

forsale [732]

Answer:

Density of mercury is 13600 kg

8 0

3 years ago

An object's mechanical energy is the sum of its

n200080 [17]

Potential energy or kinetic energy.

3 0

2 years ago

How much volume would 0.450 mol CO2 gas occupy?

umka21 [38]

Answer:

10.08 L.

Explanation:

If we assume that CO₂ gas behaves ideally at STP (standard T(0.0 °C) and P(1.0 atm)):

It is known that 1.0 mole of ideal gas occupies 22.4 L at STP conditions.

Using cross multiplication:

1.0 mole of CO₂ gas occupies → 22.4 L.

0.45 mole of CO₂ gas occupies → ??? L.

∴ The volume occupied by 0.45 mole of CO₂ gas = (0.45 mol)(22.4 L)/(1.0 mol) = 10.08 L.

5 0

3 years ago

A 48.3 mL sample of gas in a cylinder is warmed from 22 C, 87 C to 0.0 C what is the final temperature

snow_lady [41]

The answer is:

the volume stays the same. it is the pressure that increases

7 0

3 years ago

Suppose 550.mmol of electrons must be transported from one side of an electrochemical cell to another in 49.0 minutes. Calculate

nekit [7.7K]

Answer:

18.0 Ampere is the size of electric current that must flow.

Explanation:

Moles of electron , n = 550 mmol = 0.550 mol

1 mmol = 0.001 mol

Number of electrons = N

$N=N_A\times n$

Charge on N electrons : Q

$Q = N\times 1.602\times 10^{-19} C$

Duration of time charge allowed to pass = T = 49.0 min = 49.0 × 60 seconds

1 min = 60 seconds

Size of current : I

$I=\frac{Q}{T}=\frac{N\times 1.602\times 10^{-19} C}{49.0\times 60 seconds}$

$=\frac{n\times N_A\times 1.602\times 10^{-19} C}{49.0\times 60 seconds}$

$I=\frac{0.550 mol\times 6.022\times 10^{23} mol^{-1}\times 1.602\times 10^{-19} C}{49.0\times 60 seconds}=18.047 A\approx 18.0 A$

18.0 Ampere is the size of electric current that must flow.

3 0

3 years ago