Answer:
Relative molecular of the compound or infomation like vapour density, volume occupied by a known mass of its vapour at stp, etc
Explanation:
The molecular mass of a compound is twice its vapour density. We can find the molecular formula using the relationship below:
- Empirical formula is the simplest formula of a compound. It repeats itself "n" times to become a molecular formula i.e (EF)ₙ = MF...... n is the number of times the empirical formula presents in a mole of the compound.
- Most times, n is a whole number like 1,2,3,.....
Answer: Option (d) is the correct answer.
Explanation:
According to law of conservation of mass, the mass of reactants equal to the mass of products.
Therefore, when liquid 1 and liquid 2 reacts then their respective mass will be equal to the mass of products.
In a chemical equation, reactants are written of the left hand side whereas products are written on the right hand side.
Hence, we can conclude that following equation supports law of conservation of mass.
Answer:
C.) new substances that are present at the end of a reaction.
Explanation:
In a chemical reaction, substances are combined to form other substances. The substances, in a chemical reaction, that are combined or used up are called REACTANTS while those substances that are synthesised newly at the end of the reaction are called PRODUCTS.
For example, in the chemical reaction between carbon dioxide and water in photosynthesis to form glucose and oxygen as follows:
6CO2 + 6H2O --> C6H12O6 + 602
CO2 and H2O are the REACTANTS because they are the combined substances.
C6H12O6 and 02 are the PRODUCTS because they are new substances present at the end of the reaction.
<u>Answer:</u> The Henry's law constant for oxygen gas in water is
<u>Explanation:</u>
To calculate the molar solubility, we use the equation given by Henry's law, which is:
where,
= Henry's constant = ?
= solubility of oxygen gas =
= partial pressure of oxygen gas = 2.1 atm
Putting values in above equation, we get:
Hence, the Henry's law constant for oxygen gas in water is