If two charged objects are moved closer to each other, the electric force between them will?

How many grams of krypton gas will occupy 2.55 liters at 1.25 atm if it occupies 3.75 liters at 0.750 atm at 255 K

tatiyna

Answer:

There will be 94.7 grams of krypton gas

Explanation:

Step 1: Data given

at 255K and 0.750 atm the volume is 3.75 L

At 1.25 atm the volume is 2.55 L

Molar mass of krypton = 83.798 g/mol

Step 2: Calculate number of moles

p*V = n*R*T

with p = the pressure of the krypton gas = 0.750 atm

with V = the volume of the krypton gas = 3.75 L

with n = the number of moles = TO BE DETERMINED

with R = the gasconstant = 0.08206 L*atm/ mol * K

with T = the temperature = 255 K

n = R*T / p*V

n = (0.08206 * 255)/ (0.750 * 3.75)

n = 0.744 moles

Step 3: Calculate new number of moles

P1*V1 = P2*V2

P1*V1 = n1*R*T

P2*V2 = n2*R*T

(P1*V1)/R*T = (P2*V2)/n2*R*T

Since R and T do not change we can write as followed:

(P1*V1) = (P2*V2) /n2

n2 = (P2*V2) / (P1*V1)

n2 = (2.55 *1.25)/(0.75*3.75)

n2 = 1.13 moles

Step 4: Calculate mass of krypton gas

mass = Number of moles * Molar mass

mass of krypton gas = 1.13 moles * 83.798 g/mol = 94.69 grams ≈ 94.7 grams

There will be 94.7 grams of krypton gas

5 0

3 years ago

Explain what golden poison frogs, kokoe poison frogs, and black-legged poison frogs have in common

telo118 [61]

The family of poison dart frogs (Dendrobatidae) boasts over 245 species, displaying an astonishing array of colors and potency. The brilliant colors and patterns range from strawberry red, canary yellow, and sunny orange to metallic green and black with yellow polka-dots. When eaten, some merely taste bitter or irritate the predator’s mouth with burning or numbness; a few, however, are truly deadly, even to humans. the Golden poison frog is the deadliest animal on land(poison wise) but the Black-legged poison frog is right up there next to it. both can easily kill a human. Though no deaths have been confirmed, the Kokoe poison frog can theoretically also kill a human, it is just as toxic as the black-legged poison frog. so what do they all have in common? they can all kill humans

i hope this helps, please give me brainliest

3 0

3 years ago

How much has the seafloor spread since Columbus sailed?

PtichkaEL [24]

10 meter that spread many of it

3 0

3 years ago

Read 2 more answers

What is the overall cell potential for this redox reaction?

Savatey [412]

Based on the given chemical reaction, Barium undergoes oxidation since it losses electrons while Ca undergoes reduction since it gains electrons. On the given single REDOX reaction, barium gains electrons and undergo reduction, this has to be reversed to satisfy the net reaction, therefore the cell potential becomes +2.90. By this the over-all cell potential = 0.03 V

3 0

3 years ago

basketane is a hydrocarbon that is 90.8% carbon. If the molar mass is between 130-140 g/mol find the molecular formula of the co

alisha [4.7K]

Answer:

C₁₀H₁₂

Explanation:

90.8% of basketane (Hydrocarbon, contains only C and H) is Carbon, and 100-90.8 = 9.2% of the mass is hydrogen.

The molar mass is between 130-140g/mol, That means the moles of Carbon (Using its molar mass, 12.01g/mol) that are in basketane are between:

140g/mol /12.01g/mol *90.8%= 10.58 moles of C.

130g/mol / 12.01g/mol *90.8%= 9.83 moles of C.

As the moles of carbon must be given in a whole number, There are 10 moles of Carbon.

10 moles C * (12.01g / mol) = 120.1g/mol that are 90.8% of the molar mass. Molar mass of basketane is:

100% * (120.1g/mol / 90.8%) =

132.3g/mol.

The part of the molar mass due hydrogen must be:

132.3 g/mol - 120.1g/mol = 12.2 g/mol

As molar mass of hydrogen is 1g/mol, the moles of hydrogen are 12

And molecular formula is:

6 0

3 years ago