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Kaylis [27]
3 years ago
8

It takes 300 N to move a box 10 meters in 10 seconds. How much power is

Chemistry
1 answer:
Anna007 [38]3 years ago
4 0

Answer:

Power, P = 300 W

Explanation:

We have,

Force acting on the box to take it is 300 N

It is moved to a distance of 10 m in 10 seconds

It is required to find the power required to move the box. The rate at which work is done is called power required by an object. It can be given by the formula as follows :

P=\dfrac{W}{t}\\\\P=\dfrac{Fd}{t}\\\\P=\dfrac{300\times 10}{10}\\\\P=300\ W

So, the power required is 300 W.

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How many atoms are there in a sample of lead with a mass of 6.8 g?
Leviafan [203]

Answer:

B

Explanation:

3 0
2 years ago
What are the ion concentrations in a 0.12 M solution of AlCl3? A) 0.12 M Al3+ ions and 0.040 M Cl- ions B) none of the answers C
KIM [24]

Answer:

D

Explanation:

To answer this question, we will need to write the dissociation equation of aluminum trichloride.

AlCl3 ——-> Al3+ + 3Cl-

It can be seen that when aluminum chloride dissociates, it gives one mole of aluminum ion and three moles of the chloride ion.

From here we can see that the concentration of the aluminum chloride equals that of the aluminum ion while that of the chloride ion is thrice that of the aluminum chloride. This means we simply multiply 0.12M by 3 to get the molarity of the chloride ion while that of the aluminum ion remains the same

5 0
3 years ago
In the reaction 2Al2O3 → 4Al + 3O2, what is the mole ratio of aluminum to oxygen?
defon
2Al₂O₃ → 4Al + 3O₂

the mole ratio is 4:3
for every 4 Al, there must be 3 O₂ in order to make 2Al₂O₃

hope this helped at all
3 0
3 years ago
Read 2 more answers
A scholar measures 20 mL of room temperature water (22ºC) and adds 80 mL of 75°C water to it, following the
Leni [432]

Answer:

Data is not valid

Explanation:

When two liquids having different temperatures are mixed, regardless of the volumes, the final mix temperature will ALWAYS be between the initial temperature values.

1st Law Thermo => Law of Conservation of Energy => Energy can not be created nor destroyed, only changed in form. Mixing 22°C with 75°C will NOT result in a mix having a final temperature of 80°C.

∑ΔE = 0 => (mcΔT)₁ + (mcΔT)₂ = 0

[(20g)(1cal/g·°C)(Tₓ - 22°C)] + [(80g)(1cal/g·°C)(Tₓ - 75°C)] = 0

=> 20(Tₓ - 22) + 80(Tₓ - 75) = 0

=> 20Tₓ - 440 + 80Tₓ - 75 = 0

=> 100Tₓ = 440 + 75 = 515

=> Tₓ = (515/100)°C = 51.5°C final mix temperature

4 0
3 years ago
How many moles of KCLO4 can be produced with 3.45 moles of NaCl. Assume all other reactants are in excess
ycow [4]
NOTE question is incorrect: The question should be:
<span>How many moles of KCLO4 can be produced with 3.45 moles of KCl. Assume all other reactants are in excess.
.......................................................................................................................

The reaction involving formation of KClO4 is 

NaClO4      +       KCl     </span>→    KClO4       +       NaCl

From above reaction, it can be seen that 1 mole of NaClO4 reacts with 1 mole of KCl to generate 1 mole of KClO4

Thus, if all other reactant are in excess, 3.45 moles of KCl  will react with 3.45 moles of NaClO4 to form 3.45 moles of KClO4.
4 0
3 years ago
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