1answer.
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
Vladimir79 [104]
4 years ago
11

Determine the mass in grams of 3.00 × 10²¹ atoms of arsenic. (The mass of one mole of arsenic is 74.92 g.)

Chemistry
1 answer:
Tpy6a [65]4 years ago
3 0

Answer:

The answer to your question is: 0.373 g

Explanation:

Data

mass = ? g

atoms = 3 x 10 ²¹

AM = 74.92 g

Process

                     1 mol of As ------------------  6.023 x 10²³ atoms

                     x                  ------------------  3 x 10 ²¹  atoms

                     x = 4.98 x 10⁻³ moles

                     1 mol ------------------------   74.92 g

                     4.98 x 10⁻³ moles-------     x

                     x = (4.98 x 10⁻³ x 74.92)/1

                     x = 0.373 g of As

You might be interested in
How do I round 10.25 to only 3 significant digits
Lady_Fox [76]
10.3 is good the correct rounding of three sig figures

3 0
4 years ago
A thief who has stolen large quantities of uranium-235 may have increased
Gala2k [10]
Nuclear waste not a b or d it’s nuclear waste
3 0
3 years ago
If 250.0 g of water at 30.0 °C cool to 5.0 °C, how many kilojoules of energy did the water lose?
Y_Kistochka [10]

Answer:

-26.125 kj

Explanation:

Given data:

Mass of water = 250.0 g

Initial temperature = 30.0°C

Final temperature = 5.0°C

Amount of energy lost = ?

Solution:

Formula:

Q = m.c. ΔT

Q = amount of heat absorbed or released

m = mass of given substance

c = specific heat capacity of substance

ΔT = change in temperature

ΔT = T2 - T1

ΔT = 5.0°C - 30.0°C

ΔT = -25°C

Specific heat of water is 4.18 j/g.°C

Now we will put the values in formula.

Q = m.c. ΔT

Q = 250.0 g × 4.18 j/g.°C × -25°C

Q = -26125 j

J to kJ

-26125 j ×1 kj /1000 j

-26.125 kj

5 0
3 years ago
⚠️⚠️ ⚠️⚠️
Anastaziya [24]

Answer/Explanation: A weight lifted vertically to acquire gravitational potential energy. A weight lifted vertically to acquire gravitational potential energy. If the force were to be removed, the object would fall back down to the ground and the gravitational potential energy would be transferred to kinetic energy of the falling object.

3 0
3 years ago
Read 2 more answers
Construct an argument for or against the immediate introduction of fuel-cell cars. Include likely points of objection from those
ryzh [129]

Answer:

Explanation:

Fuel Cell Cars are the vehicles built to run on hydrogen gas rather than running on the hydrocarbon.

Hydrocarbons are the organic compounds which are derived mostly from the crude oil. They are usually composed of Hydrogen and Carbon.

Fuel cell cars are much more better than the regular vehicles running on hydrocarbon in so many ways especially environmentally.

Listed below are some of the advantages of fuel cell cars over the regular vehicles

Fuel cells have a higher efficiency than diesel or gas engines.

Most fuel cells operate silently, compared to internal combustion engines. They are therefore ideally suited for use within buildings such as hospitals.

Fuel cells can eliminate pollution caused by burning fossil fuels; for hydrogen fuelled fuel cells, the only by-product at point of use is water.

If the hydrogen comes from the electrolysis of water driven by renewable energy, then using fuel cells eliminates greenhouse gases over the whole cycle.

Fuel cells do not need conventional fuels such as oil or gas and can therefore reduce economic dependence on oil producing countries, creating greater energy security for the user nation.

Since hydrogen can be produced anywhere where there is water and a source of power, generation of fuel can be distributed and does not have to be grid-dependent.

The use of stationary fuel cells to generate power at the point of use allows for a decentralised power grid that is potentially more stable.

8 0
4 years ago
Read 2 more answers
Other questions:
  • What information do we need to determine the molecular formula of a compound from the empirical formula?
    8·1 answer
  • A 35.0 g piece of metal wire is heated, and the temperature changes from 21 degrees Celsius to 52 degrees Celsius. The amount of
    6·1 answer
  • A reaction progress curve has three peaks and two valleys between the peaks. this curve describes a reaction mechanism that invo
    7·1 answer
  • What did the experiments of scientists after John Dalton reveal about his
    12·1 answer
  • An object sliding along a horizontal table is an example of projectile motion.
    5·2 answers
  • 1. How does hydrogen bonding affect water molecules?
    12·1 answer
  • Extremely lost... the world is cold. Plz help
    15·1 answer
  • Terry usually rides his bike at 15 mph. If his riding speed is reduced by 3 mph, how far can he ride in 1.7 hours? ___miles​
    13·2 answers
  • How does the separation of a mixture containing salt, sand and naphthalene support the law of conservation of matter
    9·1 answer
  • Am i the only person thats gonna be doing schoolwork thanks giving beak
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!