Explain why hydrogen gas is given off when a reactive metal undergoes a single-displacement reaction with water.

NaHCO 3 and NaHSO 4 are acid salts. however aqueous solution of NaHCO 3 is basic while aqueous solution of NaHSO 4 is acidic. give reason.

What are changes that involve a change of state?

Which is one way to determine whether a reaction was a chemical reaction or a nuclear reaction? A) Check for a change in total mass during the reaction B) check to see if any energy was released during the reaction C) Measure the temperature change

When a chemical reaction occurs, O a phase change takes place o the physical and chemical properties of the products are different from the reactants O the physical and chemical properties of the reactants are the same as the properties of the

13. What salt results from the neutralization of phosphoric acid with potassium hydroxide?

How do the different spheres of Earth interact? Volcanic eruptions are natural phenomena in the. They sometimes erupt, spilling out lava and dust. The lava solidifies, forming new landmasses.

Differentiate between mass, volume, and density. Explain why only changing the shape of an object would have no effect on its density.

Describe the properties of noble gases. Based on their electronic arrangement, explain whether they can exist alone in nature.

In the reaction 2k + 2h2o → 2koh + h2, which compound has an element ratio of 2 : 1? h2o h2 k koh

Describe with sketches how electrons are transferred during ionic bonding for: (a) Lithium Bromide (LiBr) (b) Potassium Bromide (KBr) (c) Lithium Chloride (LICI)