C4D Classify matter as pure substances or mixtures

This gas is essential for us, and all other aerobic organisms, to survive. We inhale it along with the air we breathe (of which it forms approximately 21%), and it then helps in the oxidation of glucose in our bodies. How would you classify the substance?

• Element

• Compound

• Mixture

Tags

NGSS.MS-PS1-1

Water is what all life in the world depends on. How would you classify water?

• Element

• Compound

• Mixture

Tags

NGSS.MS-PS1-1

A magnesium ribbon is burnt in the air to form the grayish oxide of magnesium - magnesium oxide (MgO). How would you classify this oxide?

• Element

• Compound

• Mixture

Tags

NGSS.MS-PS1-2

How would you classify the air we breathe?

• Element

• Compound

• Mixture

These are given 'symbols' like 'Ar', 'Zn', 'W‘, and 'Xe' and are arranged in a table called the periodic table. How would you classify these substances?

• Element

• Compound

• Mixture

An unknown, silvery powder has a constant melting point and does not chemically or physically separate into other substances. How would you classify the unknown substance?

• Element

• Compound

• Mixture

Coffee beans have been decaffeinated for many years by treating them with a nonpolar solvent such as dichloromethane (CH₂Cl₂), which dissolves most of the caffeine without destroying the flavor of the coffee. The caffeine is therefore a...

• Element

• Compound

• Mixture

What type of mixture is this?

• Homogenous

• Heterogenous

substance made of only one type of atom

• element

• compound

• mixture

made of 2 or more substances that can be physically separated

• element

• compound

• mixture