Relative formula mass - class-IX
Description: relative formula mass | |
Number of Questions: 37 | |
Created by: Vaibhav Pathak | |
Tags: stoichiometric relationships moles and equations stoichiometry chemical formula and mole concept basic concepts of chemistry quantitative chemistry atoms and molecules some basic concepts of chemistry mole concept and stoichiometry chemistry gas laws and mole concept atoms, molecules and chemical reactions |
The relative atomic mass of $ Ne$ is $20.$ Its relative molecular mass is:
1 ml ${ O } _{ 2 }$ will be equal to :
How many grams of carbon dioxide is dissolved in 1 litre bottle of carbonated water if the manufacturer uses a pressure of 2.4 atmosphere in the bottling process at 25 degree Celsius?
Common salt obtained from sea-water contains $ 8.775\%$ $NaCl$ by mass. The number of formula units of $NaCl$ present in 25 g of this salt is :
How many grams of phosphoric acid $(H _2PO _4)$ would be needed to neutralise $100$g of magnesium hydroxide $(Mg(OH) _2)$?
What is the mass in grams of $6.022\times 10^{23}$ atoms of oxygen?
Sulphur trioxide is prepared by the following two reactions:
$S _8(s)+8O _2(g)\rightarrow 8SO _2(g)$
$2SO _2(g)+O _2(g)\rightarrow 2SO _3(g)$
How many grams of $SO _3$ are produced from $1$ mole of $S _8$?
Calculate the total volume of $0.1$ molar $KMn{O _4}$ solution that is needed to oxidized 100 mg of each furious oxalate and furious sulphate in a mixture in acidic medium.
Consider the following reaction sequence:
${ S } _{ 8 }(s)+{ 80 } _{ 2 }(g)\rightarrow { 8SO } _{ 2 }(g)$
${ 2SO } _{ 8 }(g)+{ O } _{ 2 }(g)\rightarrow { 2SO } _{ 3}(g)$
How many grams of ${ SO } _{ 3 }$ are produced from $1$ mole ${ SO } _{ 8 }$?
How many grams of $H _{2}SO _{4}$ are present in $0.25\ g$ mole of $H _{2}SO _{4}$?
$4 g$ atom of $Ag$ contains:
What weight of $SO _2$ can be made by burning sulphur in $5.0$ moles of oxygen?
In the following charge, $3Fe + 4{H _2}O \to F{e _2}{O _4}$ If the atomic weight of iron is $56$, then its equivalent weight will be
A sample of impure cuprite, $Cu _2O$, contains 66.6% copper. What is the percentage of pure $Cu _2 O$ in the sample:
The number of electrons in 1.8 ml of $H _{2}O$ will be:
In an ionic compound, mole ratio of cation to anion is $1:2$. If atomic masses of metal and non-metal respectively are 138 and 19, then correct statement is :
Which of the following statements are true?
The relative atomic mass of $N$ and relative molecular mass of $N _2$ are:
Find the relative molecular mass of methyl alcohol $(CH _3OH)$, if $160 gm$ of the alcohol on vaporization has a volume of $112$ litres at STP.
The element chlorine consists of mixture of 75.53% $ _{17}$Cl$^{35}$ and 24.47% $ _{17}$Cl$^{37}$ having a mass of 34.97 amu and 36.95 amu, respectively. The atomic weight of chloride is:
The formula of oxide of a metal is $MO$ and equivalent weight of metal is $20$. The atomic weight of metal is
Two flasks A and B of equal volumes are kept under similar conditions of temperature and pressure. If flask A holds 16.2 g of gas X while flask B holds 1.012 g of hydrogen, calculate the relative molecular mass of gas X:
The amount in parts by weight of sulphur present in one sulphuric acid molecule:
The molecular mass of a salt of oxy acid of chlorine of a divalent metal which contains more number of oxygen atoms than its corresponding '-ic' acid is $239\ g/mole$.
What is the atomic mass of the metal?
What was the need for using relative atomic mass or relative molecular mass?
How many gram-equivalents of NaOH are required to neutralise 25 cm$^3$ of a decinormal HCl solution ?
The atomic mass of sodium is 23. The gram-atomic mass of sodium is _______.
How many gram atoms are present in $256 g$ of ${ O } _{ 2 }$?
An ornamental ring contains 275 carats of diamond. How many grams diamond does it have?
How many grams of $NaCl$ represent 1 mole?
The charge to mass ratio of $\alpha - particle$ is approximately ____ of the charge to mass ratio of a proton is:
How many grams of phosphoric acid would be needed to neutralize $100$ gm of magnesium hydroxide? (Molecular weight of $H _3PO _4=98$ and $Mg(OH) _2=58.3 gm$)
The weight of $1$ litre of a glass at STP is $2$ grams, its molecular weight is:
The number of gram-molecules of oxygen in $6.022\times 10^{24}$ molecules of $CO$ is:
The molar mass of $CuSO _4.5H _2O$ is 249. Its equivalent mass in the reaction (a) and (b) would be:
(a) Reaction $CuSO _4 + KI \rightarrow$ product
(b) Electrolysis of $CuSO _4$ solution
10 ml of 0.1 M solution sodium hydroxide is completely neutralised by 25 ml of 3 gram of dibasic acid in one solution the molecular weight of acid is:
M g of a substance when vaporised occupy a volume of 5.6 litre at NTP. The molecular mass of the substance will be: