Recent questions tagged ch1

What do you mean by gram atomic mass. one million silver atoms weigh $1.79 \times 10^{16}\;g$ . Calculate the gram atomic mass of silver.

asked Feb 19, 2019 by meena.clay6

1 answer

How can we say that sugar is solid and water is liquid ?

asked Feb 19, 2019 by meena.clay6

1 answer

write the number of moles in 8g of helium

asked Feb 19, 2019 by meena.clay6

1 answer

$4g$ of impure $CaCO_3$ on treatment with excess HCl produces $0.88\; g\; CO_2$. What is the percent purity of $CaCO_3$ sample?

asked Feb 19, 2019 by meena.clay6

1 answer

Vapour density of a gas is 22. What is its molecular mass?

asked Feb 18, 2019 by meena.clay6

1 answer

Which pair of species have same percentage of carbon?$(A) CH_3COOH \;and\; C_6H_{12}O_6\\ (B) CH_3COOH\; and\; C_2H_5OH \\ (C) HCOOCH_3 \;and\; C_{12}H_{22}O_{11} \\ (D) C_6H_{12}O_6 \;and C_{12}H_{22}O_{11}$

asked Feb 18, 2019 by meena.clay6

1 answer

How many moles of electrons weigh one kilogram?

asked Feb 18, 2019 by meena.clay6

1 answer

The density of $2M$ solution of sodium chloride (NaCl) $1.13\; g\; mol/litre$. Calculate molality of the solution. $M= 2$ mol per litre.

asked Feb 18, 2019 by meena.clay6

1 answer

Calculate the molecular mass of Ethane $(C_2H_6)$

asked Feb 18, 2019 by meena.clay6

1 answer

Distinguish between pure substance and mixture

asked Feb 18, 2019 by meena.clay6

1 answer

What is limiting reagent?

asked Feb 18, 2019 by meena.clay6

1 answer

What is a stoichiometry?

asked Feb 18, 2019 by meena.clay6

1 answer

How are physicial properties different from chemical properties ?

asked Feb 15, 2019 by meena.clay6

1 answer

What is the difference between molecules and compounds ? give examples of each

asked Feb 15, 2019 by meena.clay6

1 answer

How much copper can be obtained from 100 g of copper sulphate $(CuSO_4)?$ (Atomic mass of $Cu=63.5\;amu$)

asked Feb 14, 2019 by meena.clay6

1 answer

Write any four postulates of Daltons atomic theory

asked Feb 14, 2019 by meena.clay6

1 answer

Calculate the percentage composition of element in methanol $(CH_2OH)$

asked Feb 14, 2019 by meena.clay6

1 answer

Calculate the formula mass of KCl (Potassium chloride)

asked Feb 14, 2019 by meena.clay6

1 answer

State Law of Multiple proportions

asked Feb 14, 2019 by meena.clay6

1 answer

Write the formula used to calculate the % composition of elements

asked Feb 14, 2019 by meena.clay6

1 answer

What is meant by dimensional analysis?

asked Feb 14, 2019 by meena.clay6

1 answer

$6.02 \times 10^{20}$ molecules of urea are present in 100 mL of its Solution. The concentration of solution is

asked Feb 14, 2019 by meena.clay6

1 answer

When 22.4 L of $H_2(g)$ is mixed with $11.2\;L$ of $Cl_2(g)$ each of at STP the moles of HCl(g) formed is equal to

asked Feb 12, 2019 by meena.clay6

1 answer

If the concentration of glucose $(C_6H_{12}O_6)$ in blood is $0.9\;g\;L^{-1}$. What will be the molarity of glugose in blood ?

asked Feb 12, 2019 by meena.clay6

1 answer

What will be the molarity of a solution , which contains 5.85 g of Nacl per 500 mL?

asked Feb 12, 2019 by meena.clay6

1 answer

The molarity of con.HCl is $1.15\;M$. What volume of con. HCl is required to make 1.00 of 0.1M HCl

asked Feb 12, 2019 by meena.clay6

2 answers

The molarity of con. HCl is 1.15 M; What volume of con. HCl is required to make 1.00 of $0.1\;M\;HCl$

asked Feb 11, 2019 by meena.clay6

1 answer

How much AgCl will be formed by adding 200 ml of 5 M HCl to the solution containing 1.7 gms of $Ag NO_3$?

asked Feb 11, 2019 by meena.clay6

1 answer

What is weight of NaOH present in 250 cc of a 2M Solution ?

asked Feb 11, 2019 by meena.clay6

1 answer

Calculate the number of moles of $H_2SO_4$ present in $50\; ml$ of $0.2 \;m\;H_2SO_4$

asked Feb 11, 2019 by meena.clay6

1 answer

How are physical properties different from chemical properties ?

asked Feb 7, 2019 by meena.clay6

1 answer

How can we separate the componenets of a compound ?

asked Feb 7, 2019 by meena.clay6

1 answer

What is the difference between molecules and compounds ?

asked Feb 6, 2019 by meena.clay6

1 answer

Identify the pair whose dimension are equal :

asked Dec 11, 2018 by pady_1

1 answer

Honeybees produce their young ones only by sexual reproduction, in spite of this, in a colony of bee

asked Jun 20, 2017 by pady_1

1 answer

Differentiate between (a) Oestrous and Menstrual cycles; (b) Ovipary and Vivipary. Cite an example f

asked Jun 14, 2017 by pady_1

1 answer

Enumerate the differences between asexual and sexual reproduction.

asked Jun 14, 2017 by pady_1

1 answer

Rose plants produce large, attractive bisexual flowers, but they seldom produce fruits. On the other

asked Jun 12, 2017 by pady_1

1 answer

Rose plants produce large, attractive bisexual flowers, but they seldom produce fruits. On the other

asked Jun 12, 2017 by pady_1

1 answer

Although sexual reproduction is a long drawn, energy intensive complex form of reproduction, many gr

asked Jun 12, 2017 by pady_1

1 answer

Do all the gametes formed from a parent organism have the same genetic composition (identi

asked Jun 12, 2017 by pady_1

1 answer

Justify the statement 'Vegetative reproduction is also a type of asexual reproduction'.

asked Jun 12, 2017 by pady_1

1 answer

Suggest a possible explanation why the seed in a pea pod are arranged in a row, whereas those in tom

asked Jun 12, 2017 by pady_1

1 answer

List the changes observed in an angiosperm flower subsequent to pollination and fertilization.

asked Jun 12, 2017 by pady_1

1 answer

List the changes observed in an angiosperm flower subsequent to pollination and fertilization.

asked Jun 12, 2017 by pady_1

1 answer

Is it possible to consider vegetative propagation observe in certain plants like Bryophyllum, water

asked Jun 12, 2017 by pady_1

1 answer

With which type of reproduction do we associate the reduction division ? Analyse the reasons for it.

asked Jun 12, 2017 by pady_1

1 answer

The number of texa exhibiting asexual reproduction is drastically reduced in higher plants (ang

asked Jun 12, 2017 by pady_1

1 answer

Which of the following are monoeciuos and dieocious organisms?

asked Jun 11, 2017 by pady_1

1 answer

Give reasons as to why cell division cannot be a type of reproduction in multicellular organism.

asked Jun 11, 2017 by pady_1

1 answer

Ask Questions, Get Answers