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
stira [4]
3 years ago
5

8. How long does it take a 19 kW steam engine to do 6.8 x 107 J of work?

Chemistry
1 answer:
kykrilka [37]3 years ago
8 0

Answer:

3.58 × 10³ seconds or 59.65 minutes

Explanation:

We are given;

  • Power of a steam engine as 19 kW
  • Work done as 6.8 × 10^7 Joules

We are required to calculate time;

We need to know that;

  • Power = Work done ÷ time
  • Power is the rate of doing work.

19 kW = 19,000 Watt

Rearranging the formula;

time = Work done ÷ power

       =  6.8 × 10^7 Joules ÷ 19,000 watt

       = 3578.95 seconds

        = 3.58 × 10³ seconds

But, 60 seconds = 1 minute

Therefore, t = 59.65 minutes

You might be interested in
Which has the larger radius, F or F− ?
vlabodo [156]

Answer is B-  F has a smaller radius than F− because an additional electron causes greater repulsion in F− is the correct choice and the nuclear charge the radius of the anion increases.

Explanation: I hoped that helped!

6 0
3 years ago
What is the theoretical yield of aluminum that can be produced by the reaction of 60.0 g of aluminum oxide with 30.0 g of carbon
Varvara68 [4.7K]

Answer: 31.8 g

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}    

\text{Moles of} Al_2O_3=\frac{60.0g}{102g/mol}=0.59moles

\text{Moles of} C=\frac{30.0g}{12g/mol}=2.5moles

Al_2O_3+3C\rightarrow 2Al+3CO  

According to stoichiometry :

1 mole of Al_2O_3 require 3 moles of C

Thus 0.59 moles of Al_2O_3 will require=\frac{3}{1}\times 0.59=1.77moles  of C

Thus Al_2O_3 is the limiting reagent as it limits the formation of product and C is the excess reagent as it is present in more amount than required.

As 1 mole of Al_2O_3 give = 2 moles of Al

Thus 0.59 moles of Al_2O_3 give =\frac{2}{1}\times 0.59=1.18moles  of Al

Mass of Al=moles\times {\text {Molar mass}}=1.18moles\times 27g/mol=31.8g

Thus 31.8 g of Al will be produced from the given masses of both reactants.

5 0
3 years ago
1)state Non-Mendillian's Law of Inheritance.
ioda

Answer:

These questions are not chemistry darling. You have chosen the wrong subject

8 0
3 years ago
When sodium metal is treated with water we get gas which is absorbed by palladium metal is ?<br>​
Scilla [17]

that gas is called hydrogen gas

8 0
4 years ago
The specific heat of silver is 0.06 cal/g°
ExtremeBDS [4]

Heat required for a system can be calculated by the product of the specific heat, temperature difference and the mass of the system. We calculate it as follows:

Q = mCΔT

Q = 50(0.06)(1)

Q = 3 calories

<span>Therefore, the correct answer from the choices listed is the second option, 3 calories.</span>

4 0
4 years ago
Read 2 more answers
Other questions:
  • In a study of the conversion of methane to other fuels, a chemical engineer mixes gaseous methane and gaseous water in a 0.669 L
    9·1 answer
  • Natural gas is nonrenewable or renewable resources ?
    15·2 answers
  • What is the chemical compound for ammonia, nitrates, nitrous oxide, nitrogen gas, and nitrites?
    13·1 answer
  • n a classroom, which comparison would a teacher most likely use for describing a mole? a cup of water and a liter of oil a dozen
    14·2 answers
  • When atmospheric carbon dioxide reacts with water in the atmosphere, it forms carbonic acid. This acid can then react with some
    5·1 answer
  • Which of the following is true about the concept of half-life?
    14·2 answers
  • Three blocks of the same mass are placed in front of you. Block A has a volume of
    5·1 answer
  • Identify the element in C6H12O6 that allows it to be classified as an organic compound.
    5·1 answer
  • Ask Your Teacher A 1.04-mole sample of ammonia at 11.0 atm and 25°C in a cylinder fitted with a movable piston expands against a
    8·1 answer
  • How does the kinetic energy of solids,liquids , and gases compare
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!