Answer:
V of Sulfur tetrafluoride is 17.2 L
Explanation:
Given data;
T = -6°C = 267K [1° C = 273 K]
n = 786 mmol of SF4 which is 0.786 mol
P = 1 atm
from ideal gas law we have
PV = nRT
where n is mole, R is gas constant, V is volume
V of Sulfur tetrafluoride is 17.2 L
Mass is calculated by using an objects inertia. Since inertia is a quality of matter that resists motion, we can apply an increasing force to an object until it accelerates.
Then, by measuring its acceleration we can now determine its mass using the simple equation F=m×a, except rewritten as m=Fa.
So we divide the force that we applied by the acceleration rate and we get the objects mass.
Without inertia this cannot be done.
∴ Answer is C
Explanation:
D air.......,..........,.......
“If a glass of full water is placed by a window and 3 hours go by, then the water in the cup will be lower because the water will evaporate.”
Physical change is described as the change that affects the form of a chemical compound but not its chemical composition. It involves the change in physical properties.
When a solid is dissolved in the liquid the solid gets dissolved in the liquid there is no breakage in the bonds and same composition of the compounds are at the end of the change. When a solution changes colour due to the addition of an other substance the bonds are broken or formed between molecules or atoms. The substance with a certain set of properties is turned into different substance with different properties. Hence it is a chemical change.
Two liquids producing heat when mixed together results in the temperature change. The heat is produced due to the increase in the temperature. Hence it is a chemical change.
When two solutions are combined gas is released due to the temperature change. This is also a chemical change
Therefore the answer is A.
