<span>7.86 g / 1 mL
divide g by 1000 for kg and divide mL by 100 for dL
</span>0.00786 kg / 0.01 dL = 0.786 kg/dL (density)
3.67 kg / 0.786 dL = 4.6692 dL
Another approach:
3.67kg > (3.67kg x 1000) = 3670 grams
3670 grams / 7.86 (density) = 466.92 mL
466.92 mL (divide by 100 for dl) = 4.6692 dL
The correct number of significant figures : 17
<h3>Further explanation</h3>
Given
mass = 8.64 g
volume = 2 ml
Required
The density of liquid
Solution
Density is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
Density formula:
The density :
ρ = 8.64 : 2
ρ = 4.32 g/ml
If we want to find density, then the steps should be as above
But if we ignore the density and just want to find the multiplication value to clarify the significant figure, then we must pay attention to the rule of multiplication, that is, <em>the end result of the multiplication has the least significant number of the numbers involved in multiplying.</em>
8.64 = 3 sig fig
2.0 = 2 sig fig
then the product contains 2 sig fig
8.64 x 2.0 = 17.28 rounded to 2 sig fig ⇒ 17
Answer:
The earth's rotation around the sun.
Explanation:
As the earth orbits around the sun, different parts of the earth are either closer or further away from it. The distance caused by the earths slight tilt is enough to change the temperature of on side of the hemisphere at a time. That is the reason why we have seasons on earth.
Answer:
19.4 g of alum, will be its theoretical yield
Explanation:
The reaction is:
2 Al + 2 KOH + 4 H₂SO₄ + 22H₂O → 3H₂ + 2KAl(SO₄)₂•12H₂O
Let's determine the amount of acid.
M are the moles contained in 1 L of solution or it can be mmoles that are contained in 1 mL of solution
M = mmol /mL
M . mL = mmol
We replace: 8.3 mL . 9.9 M = 82.17 mmoles
We convert to moles: 82.17 mmol . 1 mol / 1000mmol = 0.082 moles
Ratio is 4:2
4 moles of sulfuric acid can make 2 moles of alum
By the way, 0.082 moles of acid may produce ( 0.082 . 2) /4 = 0.041085 moles.
We convert moles to mass:
Molar mass of alum is: 473.52 g/mol.
0.041085 moles . 473.52 g/mol = 19.4 g