Answer:
Definition of science: the intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment.
The heat energy from the room temperature lemonade transfers to the cold ice cubes, causing the temperature of the lemonade to drop and the temperature of the ice cube to rise until they are equal to each other.
Answer: There are 1.78 moles in 40.0 L of He gas at STP
Explanation:
According to ideal gas equation:
P = pressure of gas = 1 atm (STP)
V = Volume of gas = 40.0 L
n = number of moles = ?
R = gas constant =
T =temperature =
(STP)
Thus there are 1.78 moles in 40.0 L of He gas at STP
Answer:
B
Explanation:
when elements reacts to form a compound the elements properties changes completely. This happens due to the fact that a chemical reaction has taken place. In a chemical change new substances are formed and the properties of the products differ entirely from that of the reactant.
for example if hydrogen combines with oxygen to form water, the property of hydrogen differs from oxygen and also both differs chemically when compared to water.
Answer:
b
Explanation:
because it be an the only answer there
