Loading [MathJax]/jax/output/HTML-CSS/jax.js

Home / Aptitude Tests / Chemistry / What is the mass of ...

What is the mass of solute in 500 $cm^{3}$ of 0.005\(moldm^...

What is the mass of solute in 500 $cm^{3}$ of 0.005 $moldm^{-3}$ $H_{2}SO_{4}$ ? ( H = 1, S = 32.0, O=16.0)

A.

0.490g

B.

0.049g

C.

0.245g

D.

0.0245g

View answer & explanation

Correct answer is C

Using

n = cv where n = no of mole, c = molar concentration(mol/dm3) and v = volume( dm3)

volume = 500 $cm^{3}$ = 0.5dm3, c = 0.005 $moldm^{-3}$

number of mole(n) = c x v = 0.5 X 0.005 = 0.0025mol.

but n = $\frac{mass}{ molar mass}$ = 0.0025 = $\frac{mass}{ 98}$ (where 98g/mol is the molar mass of H2SO4)

mass of H2SO4 = 0.0025 x 98 = 0.245g.

See all Chemistry questions & answers

See more WAEC questions & answers

Similar Questions

An organic compound which liberate carbon(iv)oxide from trioxocarbonate(iv) solution is likely to be...

Steam changes the colour of anhydrous cobalt (ll) chloride from ...

How many electrons will be found in the nucleus of an atom with mass number 23 and 17 neutrons? ...

Which of the following statements is not true of tin? it ...

Calculate the mass of chlorine gas which occupies a volume of 1.12dm3 at s.t.p [Cl = 35.5, molar vo...

A compound has an empirical formular CH2O and molecular mass of 90. [H = 1.00, C = 12.0, O = 16.0...

An acid and its conjugate base...

The sulphide that is commonly used in coating electric fluorescent tubes is? ...

How many Faradays of electricity are required to liberate 9g of aluminium? [Al = 27] ...

Which of the following statements is not correct? The 4s orbital ...

Aptitude Tests

Abstract Reasoning Questions and Answers

Personality Test

Verbal Reasoning Questions and Answers

Typing Speed and Accuracy Test

Puzzles Questions and Answers

Microsoft Office Questions and Answers

Spatial Reasoning Questions and Answers

Situational Judgement Questions and Answers

Logical Reasoning Questions and Answers

Nigeria General Knowledge Questions and Answers

Data Interpretation Questions and Answers

Quantitative Reasoning Questions and Answers

Numerical Reasoning Questions and Answers

View latest jobs in Nigeria today