Answer:
d = 3.65 g/mL
Explanation:
This problem is solved by using the equation:
d= m/V
But we have to be careful with the number of significant figures and number of decimals to report our result.
There are two steps to calculate the density:
1. We should perform a substraction to determine the mass of potassium chloride.
mass KCl =( Weight cylinder + KCl ) - (Weight empty cylinder)
92.7 g - 5.55 g = 87.15 g = 87.2 ( rounded to 1 decimal place)
The rule for addition and substraction is that we round the result to the number of decimal place with the least number of decimals ( 92.7 has one decimal, 5.55 has two)
2. We can now calculate the density by dividing the mass into the volume, but retaining the number of significant figures to the number with the smallest number of significant figures, the rule for multiplication and division.
d= m/V = 87.2 g / 23.9 mL = 3.648 g/mL
87.2 has three significant figures and so does 23.9, so we have to round to 3 significant figures.
The rule here is that if the left most digital to be dropped is greater o equal to 5, we round to the nearest higher digit, so 8 is greater than 5 and we rounded up 3.648 to 3.65.
Answer:
Diatomic molecules are molecules composed of only two atoms, of the same or different chemical elements. The prefix di- is of Greek origin, meaning "two". If a diatomic molecule consists of two atoms of the same element, such as hydrogen (H2) or oxygen (O2), then it is said to be homonuclear.
Explanation:
I did it before
the formula for density is p=m/v
m aka the mass = 5.4; the v aka the volume = 8
so, p=5.4/8
p= 0.675 g/cm^3
*let's just say the mass' unit is gram so the unit for the density is g/cm^3
Answer:
Answer below
Explanation:
Just draw a photo of someone pushing an object across a table. Your push is the force acting on the object you're pushing.
Answer:
The answer is B) The law of conservation of energy.
Explanation:
This is the answer because energy cannot be created or be destroyed in a isolated system. The second law as well states that the entropy of any isolated system always increases.
