answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
skelet666
1 month ago
15

What is the volume of 43.7 g of helium at stp?

Chemistry
2 answers:
castortr0y [3K]1 month ago
0 0

Answer: The helium gas occupies a volume of 244.72 liters.

Explanation: Provided,

Mass of helium = 43.7 g

Molar mass of helium = 4 g/mole

At standard temperature and pressure, 1 mole of gas occupies 22.4 liters.

First, we will calculate the number of moles of helium.

\text{Moles of He}=\frac{\text{Mass of He}}{\text{Molar mass of He}}=\frac{43.7g}{4g/mole}=10.925mole

Next, we will find the volume of helium.

Since 1 mole of helium gas occupies 22.4 liters, then 10.925 moles of helium gas will occupy 10.925\times 22.4=244.72 liters.

Thus, the volume of helium gas is 244.72 liters.

Tems11 [2.7K]1 month ago
0 0
The volume of helium amounts to 244.72 liters.
The mass of helium is 43.7 g.
To find the number of moles: n(He) = m(He) ÷ M(He).
Calculating gives n(He) = 43.7 g ÷ 4 g/mol.
Thus, n(He) equals 10.925 mol.
The volume of helium can be calculated as V(He) = n(He) · 22.4 L/mol.
This results in V(He) = 10.925 mol · 22.4 L/mol.
So, V(He) is 244.72 L.
Vm signifies the molar volume at standard temperature and pressure.
n stands for the amount of substance.
You might be interested in
A careless student forgets to label one of their reagent containers. They know it contains one of the following solutions: 0.1 M
castortr0y [3046]

Sagot:

0.1 M NaCl

Paliwanag:

Ang tanong na ito ay nagpapaalala sa atin ng mga patakaran sa solubility. Alalahanin natin na ang lahat ng chlorides ay natutunaw maliban sa mga ng lead, mercury II at silver na hindi natutunaw sa tubig.

Ang sumusunod na reaksyon ay mangyayari na humahantong sa pagbuo ng isang precipitate;

Pb(NO3)2(aq) + 2NaCl(aq) -------> 2NaNO3(aq) + PbCl2(s)

Ang puting precipitate na nabuo ay  PbCl2.

4 0
23 days ago
A 0.89% (w/v) sodium chloride solution is referred to as physiological saline solution because it has the same concentration of
Tems11 [2777]
1) To express 0.89% m/v, it equals 0.89 grams of NaCl per 100 ml of solution.

This corresponds to 8.9 grams of NaCl in 1000 ml of solution, or 8.9 grams in 1 liter.

2) Molarity is represented as M = moles of solute / liters of solution.

Thus, we need to determine the moles in 8.9 grams of NaCl.

3) The molar mass of NaCl is calculated as 23.0 g/mol + 35.5 g/mol = 58.5 g/mol.

4) Therefore, the number of moles of NaCl calculates as mass / molar mass = 8.9 g / 58.5 g/mol = 0.152 moles.

5) Consequently, M = 0.152 moles of NaCl / 1 liter of solution = 0.152 M.

Answer: 0.152 M
4 0
1 month ago
above shows a balloon full of gas which has a volume of 120.0ml at 300.0k assuming pressure remains constant , what is the voume
castortr0y [3046]
The balloon's volume is 128 ml when the gas temperature rises to 320.0 K. Explanation: Given the following: T1 (initial temperature) = 300K, V1 (initial volume) = 120ml, T2 (final temperature) = 320 K, V2 (final volume) =?. Pressure is kept constant during this process. From the equation: Given that the pressure stays constant, we have: V2 = Putting the values into this formula yields: V2 = 128 ml, which indicates the volume of the gas when the temperature increases from 300 K to 320 K.
4 0
1 month ago
Aqueous silver ion reacts with aqueous chloride ion to yield a white precipitate of solid silver chloride. When 10.0 mL of 1.00M
Tems11 [2777]

Answer:

Explanation:

AgNO3 + NaCl --> AgCl + NaNO3

Moles

of AgNO3

= molarity * volume

= 1 * 0.01

= 0.01 mol

for NaCl

= 0.01 * 1

= 0.01 mol.

According to stoichiometry, one mole of silver nitrate corresponds to one mole of NaCl reacted. Hence,

Moles of AgCl generated = 0.01 × 1

= 0.01 mol AgCl produced.

Heat gained by the solution as precipitation occurs:

Solution mass = density × volume

= 1 × 20

= 20 g.

Using q = m * Cp * (T2 - T1)

= 20 * 4.18 * (32.6 - 25.0)

= 635 J

The absorbed heat of 635 J indicates the reaction released -635 J

Thus, Delta H = -635 J/0.01 mol

= -63500 J/mol

= -63.5 kJ/mol.

8 0
1 month ago
A food worker had safely cooled a large pot of soup to 70 F (21 C) with two hours. What temperature must the soup Reach in the f
lorasvet [2795]

After four hours of cooling, the soup reached a temperature of 140 F (or) 42 C.

Explanation:

A food worker allowed a cup of soup to cool for two hours,

step 1: The temperature attained in two hours is 70 F (or) 21 C

step 2: Consequently, in four hours, this doubles the value

Therefore, the temperature after four hours is 2(70)= 140 F (or) 2(21)= 42 C

4 0
1 month ago
Other questions:
  • Give the atomic symbol for an element that does not exist as a molecule or extended structure. that is, an element that exists o
    14·2 answers
  • Write a hypothesis for Part II of the lab, which is about the type of material an object is made of, and its ability to absorb o
    15·2 answers
  • What elements are in NaC2HO4 and how many atoms are in each element​
    12·1 answer
  • 65g of nitric acid are produced in a reaction. 2.5g of platinum are added to the reaction vessel at the start of the reaction to
    13·1 answer
  • Suppose that one of millikan's oil drops has a charge of −4.8×10−19
    5·2 answers
  • A scientist makes an acid solution by adding drops of acid to 1.2 l of water. the final volume of the acid solution is 1.202 l.
    5·1 answer
  • For the following equilibrium: A+2B⇋C+3D If the change in concentration for B is 0.44 M, what will be the change in concentratio
    6·1 answer
  • Which example best demonstrates stewardship of the atmosphere
    8·1 answer
  • How many grams of calcium chloride are needed to produce 1.50 g of potassium chloride? cacl2(aq) + k2co3(aq) → 2 kcl(aq) + caco3
    11·2 answers
  • How many grams of Fe are produced from 65.9 g of FeO given the following reaction: 3FeO + 2Al -> 3Fe +Al2O3
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!