Need to use the formula---> final amount= initial amount x (1/2)^(t/h), where t is time and h is half-life. time between noon and 2 pm is two hours. half life is 1 hour
final amount = 40.0 g x (1/2)^( 2 hours/1 hour)= 10 grams
True. The five characteristics necessary for a substance to be a mineral are Naturally Occurring, Inorganic, Solid, crystal structure and Definite Chemical Composition. Each mineral has its own properties because all minerals are compounds.
Answer:
Whenever the two groups on each end of a carbon-carbon double bond are the same, two diastereomers are possible.
Explanation:
Double bonds are formed when four electrons are shared between two carbon atoms. The second bond is generally known as a pi-bond while the first bond is called a sigma bond.
The presence of a double bond in a compound leads to restricted rotation about the carbon-carbon double bond. Hence the substituents are 'locked' in a particular configuration.
The more substituted a double bond is, the more stable it is according to Saytzeff's Rule.
Due to steric effects, trans alkenes are generally more thermodynamically stable than cis alkenes since trans alkenes have bulky groups oriented apart from each other.
All these are true statements. The answer selected must be the untrue statement.
Reacting with metals is not a common property of bases. Bases do however react with acids.