If one mole of carbon contains x atoms then the number of atoms in 12g of Mg are

  • x
  • 0.5x
  • 2x
  • 1.5x

A science that examines the material this universe contains and changes in them is called

  • Chemistry
  • Physics
  • Biology
  • Geography

The molecular mass of glucose is

  • 180.096 amu
  • 190.096 amu
  • 181.096 amu
  • 130.096 amu

Negatively charged ions are called

  • cations
  • anions
  • ion
  • none of above

The number of atoms of hydrogen in 2 moles of NH3

  • 5 * 1023
  • 3.01 * 1023
  • 3.61 * 1024
  • 4 * 1023

Compounds have atoms of

  • same sizes
  • different sizes
  • same electrons
  • different electrons

An oxide ion has -2 charge because

  • oxygen looses two electrons
  • oxygen gains two electrons
  • oxygen becomes neutral
  • oxygen gains 3 electrons

Which of the following is present in vinegar?

  • 10% acetic acid
  • 5%acetic acid
  • 7% acetic acid
  • 8% acetic acid

The molecular formula gives

  • simplest ratio of atoms
  • actual whole number ratio of atoms
  • whole number ratio of atoms
  • natural number ratio of atoms

6.022 * 1023 atoms of Sulphur contains

  • 2 moles
  • 3 moles
  • 4 moles
  • 1 mole

An ionic compound is electrically

  • neutral
  • positively charged
  • negatively charged
  • none of above

Gram molecular mass of C6H12O6 is

  • 18.016g
  • 180.096g
  • 58.5g
  • 70g

The mass of carbon present in 44g of carbon dioxide is

  • 12g
  • 6g
  • 24g
  • 44g

The substance which has a formula mass of 133.5 amu is

  • MgCl2
  • S2Cl2
  • BCl3
  • AlCl3

The gram atomic mass of Zn is

  • 23g
  • 12g
  • 63.54g
  • 56.67g

A substance whose all atoms have the same atomic number is

  • molecule
  • atom
  • element
  • ion

The relative atomic mass of Na is

  • 1.008 amu
  • 22.9898 amu
  • 26.9815 amu
  • 15.9994 amu

The mass of an atom relative to C-12 is

  • atomic mass
  • atomic number
  • nucleon number
  • relative atomic mass

In glucose the simplest ratio between C, H and O is

  • 0.0840625
  • 0.126400463
  • 0.04306713
  • 0.127789352

The formula mass of NaCl is

  • 57.5 amu
  • 58.5 amu
  • 59.5 amu
  • 60.0 amu
0 h : 0 m : 1 s

Answered Not Answered Not Visited Correct : 0 Incorrect : 0