What type of chemical reaction is 4 Fe + 302 → 2Fe20; ?

O single-displacement

decomposition

synthesis

double-displacement

Explain how valence electrons are involved in ionic and metallic bonding

What is the mass of a sample of NH3 containing 6.3 * 1024 molecules of NH3? 157 grams 178 grams 182 grams 198 grams

A beaker contains 100.0 mL of a 0.100 M solution of sulfuric acid. When 100.0 mL water is added to this solution, what is the concentration of the diluted sulfuric acid?

How many valence electrons does a sulfate (S04-2) ion contain? 30 32 24

Question 2 Unsaved Which of the following chemical formulas shows a covalent compound? a) CO2 b) MgO c) NaCl d) HBr

Check Sodium inside a star is most likely formed by which process? fission fusion <<--? alpha emission Beta emission

Which of these is the main goal of any titration? to observe the effect of indicators on acids to observe the effect of indicators on bases --> (((to determine the concentration of one of the reactants))) <--- to determine the effects of a base on

How can a sea cave become a sea arch?

Where do the elements in the human body tend to be located on the table

What kind of energy can be lost in a system?