Chemistry

The combining capacity of an element is called

• valency
• conductivity
• viscosity
• density

The formula of Ammonium phosphate is

• (NH₄)₄PO₄

• (NH₄)₃PO₄

• (NH₄)₂PO₄

• NH₄PO₄

The mass of 18ml of water at 4⁰C is equal to

• 18g

• >18g

• <18g

• 4g

The ratio between hydrogen and oxygen in H₂O by mass is

• 2:16

• 1:8

• 3:18

• 3:24

Tags

NGSS.HS-PS1-7

A MOLECULE IS

• A group of atoms bonded together
• A type of element

• A form of energy
• a group of elements

Tags

NGSS.HS-LS1-6

Which is a polyatomic ion

• Helium (He)
• Sodium (Na)
• Oxygen (O)
• Sulfate (SO₄ ^2-)

The chemical name of NH₄OH

• Ammonium hydroxide
• Hydrogen nitrate
• Ammonium oxide
• Nitrogen hydroxide

The molecular mass of C₆H₁₂O₆ is

(a)  

Calculate the mass of MgCl₂

(a)  

The combining capacity of an element is known as

• magnetism
• conductivity
• valency
• density