Conservation of Mass

Q. Write the balanced chemical equation of the following word equation.
j) Aluminium carbide $+$ water $\to$aluminium hydroxide $+$ methane

Q. Question 32
Fill in the missing data in the Table 3.1
$\begin{array}{ccccc}Speciesproperty& H_{2}O& C{O}_2& Na-atom& MgC{l}_2\\ Numberofmoles& 2& -& -& 0.5\\ Numberofparticles& -& 3.011\times {10}^{23}& -& -\\ Mass& 36g& -& 115g& -\end{array}$

Q.

Question 11
Calculate the number of aluminium ions present in 0.051 g of aluminium oxide.

Q. Question 37
Which has more number of atoms?
100g on $N_2$ or 100 g of $N{H}_3$

Q. Assertion :The mass and the charge are balanced on both sides of the reaction is a balanced chemical equation. Reason: The chemical reaction should be balanced so that it can follow the law of conservation of mass.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Nitrogen reacts with hydrogen to give ammonia. Calculate the volume of the ammonia gas formed when nitrogen reacts with 6 litres of hydrogen. All volumes measured at S.T.P.

1. 4 litres
2. 3 litres
3. 2 litres
4. 1 litre

Q. What mass of silver nitrate will react with $5.85g$ of sodium chloride to produce $14.35g$ of silver chloride and $8.5g$ of sodium nitrate. If the law of conservation of mass is true?

Q. Calculate the number of aluminium ions present in 0.051 g of aluminium oxide.

Q. When 5 g of calcium is burnt in 2 g of oxygen, then 7 g of calcium oxide is produced. What mass of calcium oxide will be produced when 5 g of calcium is burnt in 20 g of oxygen?

Q.

Consider the following reaction.

$Cu(N{O}_3{)}_2\to CuO+N{O}_2+O_2$ Which of the following are correct?

1. Mass of products = mass of reactants

2. Number of atoms on either side of the reaction are equal

3. Mass of reactants is not equal to mass of products

4. Number of atoms on product side is more than the reactant side.

Q. Calculate the number of aluminium ions present in 0.051 g of aluminium oxide.

Q.

how does the law of conservation of mass apply to burning a candle?

Q. Calculate the number of aluminium ions present in 0.051 g of aluminium oxide.