What is the name of the element above?

a. hydrogen

b. helium

c. lithium

d. boron

When calcium carbonate is added to hydrochloric acid, calcium chloride, carbon dioxide, and water are produced. CaCO3 (s) + 2 HCl (aq) → CaCl2 (aq) + H2O (1) + CO2 (8) How many grams of calcium chloride will be produced when 29.

What mass of bromine reacts with 16.2 g of aluminium?

Segundo o entendimento do STF, assinale a alternativa correta sobre o pedágio:

Methane reacts with oxygen to produce carbon dioxide and water. What are the products? A. methane and water B. oxygen and carbon dioxide C. methane and oxygen D. carbon dioxide and water

Which is true of transition metals when moving from left to right on the periodic table? a. The d sublevels are not filled across the period. b. The cation radii become larger across the period. c.

Which formula id correctly paired with its name? A. MgSO↓ = magnesium chlorine B. FeO = iron (|||) oxide C. K↓2O = Phosphorus dioxide D. CuCI↓2 = copper (||) chloride

Which of the following correctly explains the role of enzymes in biochemical reactions? A) Enzymes provide energy in the form of ATP to lower the activation energy needed for the reaction.

How does being a landlord relate to chemistry in any way

Element m has an ellectronegativity of less than 1.2 and reacts with bromine to form the compound MBr2. Element M could be?

Which situation describes evidence of a chemical change? A. When food color is added to water, it changes color. B. A solid changes into liquid when heated. C. A solution feels warm after a cool solid is added to it. D.