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
Serga [27]
2 years ago
12

12 Which is an example of a pulley? A.shoes B.fork C.stairs D. a stapler​

Chemistry
1 answer:
k0ka [10]2 years ago
3 0
The correct answer is c, stairs. because it makes the most sense, correct me if i’m wrong though please :)
You might be interested in
An air mattress is filled with 16.5 moles of air. The air inside the mattress has a temperature of 295 K and a gauge pressure of
postnew [5]
PV=nRT
3.5×X=16.5×0.082×295
X= 114 L
The volume of the air mattress is 114 liters.
7 0
3 years ago
Read 2 more answers
How many grams of Ni are formed from 55.3 g of Ni2O3?<br><br> 2Ni2O3(s)⟶4Ni(s)+3O2(g)
Neko [114]

Answer:

39.2 g

Explanation:

  • 2Ni₂O₃(s) ⟶ 4Ni(s) + 3O₂(g)

First we <u>convert 55.3 grams of Ni₂O₃ into moles of Ni₂O₃</u>, using its<em> molar mass</em>:

  • 55.3 g ÷ 165.39 g/mol = 0.334 mol Ni₂O₃

Then we <u>convert 0.334 moles of Ni₂O₃ into moles of Ni</u>, using the <em>stoichiometric coefficients of the balanced reaction</em>:

  • 0.334 mol Ni₂O₃ * \frac{4molNi}{2molNi_2O_3} = 0.668 mol Ni

Finally we <u>calculate how much do 0.668 Ni moles weigh</u>, using the<em> molar mass of Ni </em>:

  • 0.668 mol Ni * 58.69 g/mol = 39.2 g
7 0
3 years ago
A bucket of water contains 5.45 L of water, how many mL of water is this ?
nalin [4]
Answer: It is 5450 mL


Explanation: There are 1000 mL in every L and then there is an extra 450 so just add that at the end
6 0
3 years ago
If a sample of air in a school container was heated, would the percentage of oxygen in the air increase, decrease, or remain unc
Viktor [21]

Answer:

increase

Explanation:

Let's suppose we have a sample of air in a closed container. We heat the container and we want to predict what would happen to the pressure.

According to Gay-Lussac's law, the pressure of a gas is directly proportional to its absolute temperature.

Thus, if we increased the temperature of the air by heating it, its pressure would increase.

If a sample of air in a closed container was heated, the total pressure of the air would increase.

5 0
2 years ago
A gas occupies a volume at 34.2 mL at a temperature of 15.0 C and a pressure of 800.0 torr. What will be the volume of this gas
Grace [21]
The answer is 34.1 mL.
Solution:
Assuming ideal behavior of gases, we can use the universal gas law equation
     P1V1/T1 = P2V2/T2
The terms with subscripts of one represent the given initial values while for terms with subscripts of two represent the standard states which is the final condition.
At STP, P2 is 760.0torr and T2 is 0°C or 273.15K. Substituting the values to the ideal gas expression, we can now calculate for the volume V2 of the gas at STP:
     (800.0torr * 34.2mL) / 288.15K = (760.0torr * V2) / 273.15K
     V2 = (800.0torr * 34.2mL * 273.15K) / (288.15K * 760.0torr)
     V2 = 34.1 mL
3 0
3 years ago
Read 2 more answers
Other questions:
  • Why are elements organized in the same group or families
    13·2 answers
  • Glass or concrete has the better sound reflector?​
    13·1 answer
  • How much heat, in kJ, is required to melt 54.0 g of ice at 0°C into water at 0°C if Hfus for water = 6.01?
    5·2 answers
  • Amateur radio operators in the United States can transmit on several bands. One of those bands consists of radio waves with a wa
    6·1 answer
  • How long must you immerse equipmemt and utensils in a non-chlorine sanitizing solution
    9·1 answer
  • Find the perimeter of the square and then convert the answer to meters
    11·1 answer
  • 5 kinds of trace fossils
    10·1 answer
  • What is the molar mass of Ca(OH)2?
    12·1 answer
  • Chemists predict the geometry of molecules based on the repulsion of electron pairs. Molecules can be represented by the general
    7·2 answers
  • Explain what physical state ypu would expect astatine to be in at room temperature
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!