Which of the following reactions shows a physical change?

In a chemical equation, the coefficients represent the ...

Why do elements in the same group have similar properties

What type of reaction does this chemical equation represent CH4 + 2O2 ➡️ CO2+2H2O + energy A. decomposition B. Endothermic C. Exothermic D. Synthesis

When gold is melted and formed in a mold to make a piece of jewelry, what type of change is taking place?

How many grams of hydrogen are in "69" g of ch4o?

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.