Recent questions in Chemistry

How many litres of ammonia are present in 3.4 kg of it? (N = 14, H = 1)

asked Oct 15, 2018 by meena.p

1 answer

How many litres of ammonia are present in 3.4 kg of it? (N = 14, H = 1)

asked Oct 11, 2018 by meena.p

0 answers

The reaction between aluminium carbide and water takes place according to the following equation:$Al_4C_3+12H_2O \longrightarrow 3CH_4+4Al(OH)_3$ calculate the volume of $C H_4$ released from $14.4\;g$ of $Al_4 C_3$ by excess water at S.T.P. $(C = 12, Al = 27)$

asked Oct 11, 2018 by meena.p

1 answer

What is the volume of 7.1 g of chlorine $(Cl=35.5)$ at S.T.P.

asked Oct 11, 2018 by meena.p

1 answer

The formula of ethanol is $C_2H_5—OH$. Its molecular mass is

asked Oct 11, 2018 by meena.p

1 answer

Convert 12 g of oxygen gas into mole

asked Oct 11, 2018 by meena.p

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If one mole of carbon atoms weigh 12 grams, what is the mass (in grams) of 1 atom of carbon?

asked Oct 11, 2018 by meena.p

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Hydrogen and oxygen combine in the ratio of 1 : 8 by mass to form water. What mass of oxygen gas would be required to react completely with 3 g of hydrogen gas?

asked Oct 11, 2018 by meena.p

1 answer

If an atom or atoms gain electrons or lose protons, the ion will have a negative charge. This kind of ion is called an anion. Ions normally are found as

asked Oct 11, 2018 by meena.p

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Balanced equations have the same number of reactant atoms as the product atoms because the conservation of matter must apply in all regular chemical equations.

asked Oct 10, 2018 by meena.p

1 answer

In the usual laboratory preparation equation for the reaction in question 2, what is the coefficient of $O_2$?

asked Oct 10, 2018 by meena.p

1 answer

A compound that can be decomposed to produce oxygen gas in the lab is

asked Oct 10, 2018 by meena.p

1 answer

Balanced equations have the same number of reactant atoms as the product atoms because the conservation of matter must apply in all regular chemical equations.

asked Oct 10, 2018 by meena.p

1 answer

Fluorine is assigned an oxidation number of 1 in all compounds because fluorine is the most electronegative element.

asked Oct 10, 2018 by meena.p

1 answer

In the formula of a compound, the algebraic sum of the oxidation numbers must be 0 because oxygen's oxidation number in most compounds is ?

asked Oct 10, 2018 by meena.p

1 answer

Balance the following equation: $SnO_2+H_2+Sn+H_2O$

asked Oct 8, 2018 by meena.p

1 answer

Oxidation number of Cr in $K_2CrO_4$

asked Oct 8, 2018 by meena.p

1 answer

A chemical can be defined as

asked Oct 8, 2018 by meena.p

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In which of the following acid, which acid has oxidation reduction and complex formation properties

asked Oct 4, 2018 by meena.p

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When P reacts with caustic soda, the products are $PH_3$ and $NaH_2PO_2$. This reaction is an example of

asked Oct 4, 2018 by meena.p

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Excess of KI reacts with $CuSo_4$ solution and then $Na_2S_2O_3$ solution is added to it. Which of the statements is incorrect for this reaction ?

asked Oct 4, 2018 by meena.p

1 answer

When $Cl_2$ gas reacts with hot and concentrated sodium hydroxide solution, the oxidation number of chlorine changes from

asked Oct 4, 2018 by meena.p

1 answer

Calculate the volume of $0.01\;M\;KMnO_4$ solution required in acidic medium for complete oxidation of 100 ml of ferrous Solution whose strength is $3.6\;gL^{-1}$

asked Oct 4, 2018 by meena.p

1 answer

Excess of KI reacts with $CuSo_4$ solution and then $Na_2S_2O_3$ solution is added to it. Which of the statements is incorrect for this reaction ?

asked Oct 4, 2018 by meena.p

1 answer

The conversion of $PbO_2$ to $Pb(NO_3)_2$ is

asked Oct 4, 2018 by meena.p

1 answer

Burning of lime to give calcium oxide and carbon dioxide is

asked Oct 3, 2018 by meena.p

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In the decomposition reaction of a hydrogen peroxide solution : $2H_2O_2 (aq) \to 2H_2O(l) +O_2(g)$

asked Oct 3, 2018 by meena.p

1 answer

In the combustion reaction between butane $(C_4H_{10})$ and oxygen , the oxidation state of carbon goes from

asked Oct 3, 2018 by meena.p

1 answer

Which of the following statement is NOT true ?

asked Oct 3, 2018 by meena.p

1 answer

of the following , the element that does NOT react with hydrochloric acid to produce hydrogen gas is

asked Oct 3, 2018 by meena.p

1 answer

When elemental bromine $(Br_2)$ reacts with a solution of sodium iodide (Nal)

asked Oct 3, 2018 by meena.p

1 answer

Reduction agents are substances that

asked Oct 3, 2018 by meena.p

1 answer

Which of the following is true ?

asked Oct 3, 2018 by meena.p

1 answer

The reaction type that could possibily be viewed as a redox reaction in which only one substance is present in the reactants.

asked Oct 3, 2018 by meena.p

1 answer

The reaction type that does not generally involved the transfer of electrons and is not viewed as a redox reaction .

asked Sep 27, 2018 by meena.p

1 answer

The reaction type that can be viewed as redox often involving hydrocarbon fules and oxygen releasing heat and light .

asked Sep 27, 2018 by meena.p

1 answer

The reaction type that can be viewed as redox often involving hydrocarbon fueld and oxygen releasing heat and light

asked Sep 27, 2018 by meena.p

1 answer

What does each letter of the ideal gas law represent?

asked Sep 26, 2018 by meena.p

1 answer

If 1.0 mol of helium gas (He) at standard temperature and pressure (STP) has a volume of 22.4L, how many moles of carbon tetrachloride gas $(CCl_4)$ will be present in a container with a volume of 22.4L?

asked Sep 26, 2018 by meena.p

1 answer

If the temperature of a gas increases, what happens to the pressure?

asked Sep 26, 2018 by meena.p

1 answer

In which condition can real gas obey closely the ideal gas equation?

asked Sep 26, 2018 by meena.p

1 answer

The perfect example of an ideal gas is

asked Sep 26, 2018 by meena.p

1 answer

A gas mixture has $30\% O_2, 40\% H_2,$ and $30\% N_2$ with molar volume of $N_2\; 10 L/mole$ at temperature $27^{\circ}C$, what is the partial pressure of $H_2$?

asked Sep 26, 2018 by meena.p

1 answer

The fraction of gas in a container is 0.5, if the total volume of the container is 6 liter, what is the volume of the gas?

asked Sep 26, 2018 by meena.p

1 answer

What happens to the pressure of a closed gaseous system when the temperature increases two-fold?

asked Sep 25, 2018 by meena.p

0 answers

A gas in a 30.0mL container is at 1.05atm is compressed to a volume of 15.0mL. What is the new pressure of the container? Possi

asked Sep 25, 2018 by meena.p

1 answer

Which of the following is not the unit of R?

asked Sep 25, 2018 by meena.p

1 answer

What is the molecular mass of an ideal gas with pressure 1 atm, and density 10 g/L at temperature $27^{\circ}C$?

asked Sep 25, 2018 by meena.p

1 answer

First of the two ideal gases has twice molar volume as much as the second at same temperature, what is the ratio of their pressures?

asked Sep 25, 2018 by meena.p

1 answer

What is the Temperature of a 2 liter/mole ideal gas with pressure 10 atm?

asked Sep 25, 2018 by meena.p

1 answer

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