The correct answer is B. An observation
Explanation:
An observation is defined as a statement or conclusion you made after observing or measuring a phenomenon, this includes statements based on precise instruments. For example, if you conclude a plant grows 2 inches every month by measuring the plant during this time, this is classified as an observation. The conclusion of the student is also an observation because he concludes this after analyzing the volume of the water in the cylinder through the lines in the graduated cylinder, considering the water is just in the middle of 100 mL and 200 mL which indicates there are 150 mL of water.
Answer:
1 = 1.203 L.
2 = 1.291 dg.
3 = 843.062 - 638.1848 = 204.8772
The answer consist of seven significant figures.
4= 123.0 × 8.43 = 1036.89
answer consist of six significant figures.
Explanation:
Q 1 = part 1
Convert the 1202.57120 mL into L
Both milliliter and litters are the unit of volume. Liter is larger unit while milliliter is the smaller unit. One liter is equal to the thousand milliliter. In order to convert the milliliter into liter we will divide the given value by thousand.
1202.57120 / 1000 = 1.2025712 L
By rounding the answer into four significant figures 1.203 L.
Q 1 = Part 2
Convert the 0.1290743 g into dg.
The gram and decigram are both the unit of mass. gram is larger unit decigram is smaller unit. one gram is equal to 10 dg. In order to convert the gram unto dg we will multiply the value with 10.
0.1290743 × 10 = 1.290743 dg
By rounding the answer into four significant figures 1.291 dg.
Q 1 = part 3
843.062 - 638.1848 = 204.8772
The answer consist of seven significant figures. The zero between the 2 and 4 is also a significant. If we have to round the answer in four significant figures the answer will be 204. 9.
Q 1 = part 4
123.0 × 8.43 = 1036.89
answer consist of six significant figures. if we round the answer into four significant figures then answer will be 1037.
Answer: The molar mass of the gas is 31.6 g/mol
Explanation:
According to ideal gas equation:
P = pressure of gas = 3.0 atm
V = Volume of gas = 25.0 L
n = number of moles = ?
R = gas constant =
T =temperature =
Moles =
The molar mass of the gas is 31.6 g/mol