The correct answer is A. C3H4 is the three-carbon alkene contains two double bonds. Alkenes are a class of organic compounds with carbon-carbon double bond. The structure for C3H4 is:
<span>
H2C=C=CH2</span>
Answer:
The molar mass would double
Explanation:
This would double the molar mass. Even though this question is about a liquid but we can use an example we see a lot in elements like oxygen, flourine, nitrogen and others whose atomic attractions make them exist as diatomic gases. This is why their molar masses are twice their relative atomic masses (in grams). The same thing would happen here. The molar mass of A would have to double.
Answer:
2.5 g of platinum
Explanation:
Recall that a catalyst is a specie added to a reaction system to increase the rate of reaction. A catalyst does not participate in the chemical reaction hence it remains unchanged at the end of the chemical reaction. A catalyst merely provides an alternative reaction pathway by lowering the activation energy of the reaction system. Hence a catalysed reaction usually proceeds faster with less energy requirement than the uncatalysed reaction.
Since the catalyst does not participate in the reactions and remains unchanged at the end of the reaction, the mass of platinum will remain the same (2.5g). The mass can only change if a specie participates in the chemical reaction. Hence the answer.
The correct answer from the given choices is A. One gram of table sugar is equal to 1.76 x 10^21 molecules of sucrose. Scientific notation is a method that scientists use to easily handle numbers that are very large or very small.
The density is calculated with the following formula:
density = mass / volume
If there is water on the pan of scale, you will read the mass of the mineral plus mass of water.
Using this value to calculate the density (ignoring the fact that you had water) you will obtain a higher density of the mineral than the real one.
