Question

how many chlorine atoms are present in 2 units of magnesium chloride (mgcl2)? there are 6 chlorine atoms in 2 units of magnesium chloride (mgcl2). there are 2 chlorine atoms in 2 units of magnesium chloride (mgcl2). there are 8 chlorine atoms in 2 units of magnesium chloride (mgcl2). there are 4 chlorine atoms in 2 units of magnesium chloride (mgcl2). how many oxygen atoms are present in 2 molecules of sulfur trioxide (so3)? there are 3 oxygen atoms in 2 molecules of sulfur trioxide (so3). there are 12 oxygen atoms in 2 molecules of sulfur trioxide (so3). there are 6 oxygen atoms in 2 molecules of sulfur trioxide (so3). there are 9 oxygen atoms in 2 molecules of sulfur trioxide (so3).

Explanation:

Step1: Analyze MgCl2 formula

One unit of MgCl2 has 2 chlorine atoms.

Step2: Calculate for 2 units

For 2 units, number of Cl - atoms = 2×2 = 4.

Step1: Analyze SO3 formula

One molecule of SO3 has 3 oxygen atoms.

Step2: Calculate for 2 molecules

For 2 molecules, number of O - atoms = 2×3=6.

Answer:

There are 4 chlorine atoms in 2 units of magnesium chloride (MgCl2).