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3 years ago

Which of the following is a force? A. mass B. volume C. weight D. length

Chemistry

2 answers:

pychu [463]3 years ago

7 0

I believe it’s C......

mafiozo [28]3 years ago

3 0

it should be c <3 lol hahahahaahaa

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What would be the mass number of an atom with an atomic mass of 56.23 amu?

OlgaM077 [116]

Answer:

Explanation:

26 because if you split 56.23 in half you get 26

8 0

3 years ago

please help me with Chem I ONLY HAVE 5 MINUTES if methane gas (CH4) flows at a rate of 0.25L/s, how many grams of methane gas wi

Nookie1986 [14]

Answer:

643g of methane will there be in the room

Explanation:

To solve this question we must, as first, find the volume of methane after 1h = 3600s. With the volume we can find the moles of methane using PV = nRT -Assuming STP-. With the moles and the molar mass of methane (16g/mol) we can find the mass of methane gas after 1 hour as follows:

Volume Methane:

3600s * (0.25L / s) = 900L Methane

Moles methane:

PV = nRT; PV / RT = n

Where P = 1atm at STP, V is volume = 900L; R is gas constant = 0.082atmL/molK; T is absolute temperature = 273.15K at sTP

Replacing:

PV / RT = n

1atm*900L / 0.082atmL/molK*273.15 = n

n = 40.18mol methane

Mass methane:

40.18 moles * (16g/mol) =

<h3>643g of methane will there be in the room</h3>

5 0

3 years ago

How many calories are needed to melt 30 grams of copper

hjlf

The amount of calories you weight

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3 years ago

A sample of methane gas has a volume of 10 l at a pressure of 1.5 atm and a temperature of 20 °c. what volume does the gas occup

a_sh-v [17]

We can use combined gas laws to solve for the volume of the gas
$\frac{PV}{T}$
where P - pressure, V - volume , T - temperature and k - constant
$\frac{P1V1}{T1} = \frac{P2V2}{T2}$
parameters for the first instance are on the left side and parameters for the second instance are on the right side of the equation
T1 - temperature in Kelvin - 20 °C + 273 = 293 K
T2 - 40 °C + 273 = 313 K
substituting the values
$\frac{1.5 atm*10L}{293 K} = \frac{0.9 atm*V}{313K}$
V = 17.8 L
volume of the gas is 17.8 L

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3 years ago

A voltaic cell is constructed with two silver-silver chloride electrodes, where the half-reaction is

NemiM [27]

The silver chloride electrode usually functions as a redox electrode where the equilibrium is achieved between silver and its salt (silver chloride).
The half reaction for this electrode is as follow:
AgCl(s)+e−→Ag(s)+Cl−(aq) where:
(s) refers to solid state
(aq) refers to the aqueous state and
e- is the electron

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3 years ago