Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound. Both metals and non-metals take part indisplacement reactions. Example :Reaction of iron nails with copper sulphate solution.AB + C → AC + B
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The scale will read <u>112 grams.</u>
Why?
Since we already know the percent error of the scale (12%) and we also know the mass of the block that is placed on the scale, we can calculate what will be the read of the scale by using the following formula:
We can see that the scale will read 112 grams.
Let's verify that we are right by using the following formula to verify if the obtained value for the scale read will be 12%:
Hence, we can see that the scale will read <u>112 grams.</u>
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D. It has mass, takes up space, and can be seen without a microscope.
Answer:
P = 24.34 atm
Explanation:
V = 5.0L
P = ?
n = 4.75 moles
T = 39.3°C = (39.3 + 273.15)K = 312.45K
From ideal gas equation,
PV = nRT
P = pressure of the gas
V = volume of the gas
n = no. Of moles present
R = ideal gas constant = 0.082atm.L / mol.K
PV = nRT
P = nRT / V
P = (4.75 * 0.082 * 312.45) / 5
P = 121.699 / 5
P = 24.339 atm
P = 24.34 atm
The pressure of the gas is 24.34 atm