What do scientists suspect the core might be made of?

How many moles of oxygen are needed to react with 6.78 grams of ammonia? 4NH3 + 5O2-> 4NO + 6 H2O

Which of the following choices represents a balanced chemical equation? Ca3 (PO4) 2 + 6SiO2 → P4O10 + 3CaSiO3 2Ca3 (PO4) 2 + 6SiO2 → P4O10 + 6CaSiO3 2Ca3 (PO4) 2 + 3SiO2 → 2P4O10 + 2CaSiO3 3Ca3 (PO4) 2 + 2SiO2 → P4O10 + 4CaSiO3

The noble gases are grouped together in the periodic table. where are the noble gases in the table? a. the top row b. the bottom row c. the far left column d. the far right column user: where on the periodic table are the metals found? a.

This is our main source of heat

Which element would have a similar chemical reaction as lithium (Li) ? * Carbon (C) Helium (He) Sodium (Na) Beryllium (Be)

What are three conditions that can cause chemical reactions to occur?

Facts about heat absorption and simple questions about heat absorption with answer

You measure a piece of wood with a meter stick and is it exactly one meter long. How many centimeters long is it?

When salt dissolved in water, what type of change occurs? A) physical only B) chemical only C) physical and chemical

Select all of the characteristics that define matter. A.) Matter has mass. B.) Matter has volume (takes up space). C.) Atoms and compounds are made out of matter. D.) All matter has the same density.