What is the density of an unknown substance that has a mass of 50 g and its measurements are 9.0 cm high, 10cm long, and 2 cm wide?

When substances react chemically to create a new substance, will that new substance have the same physical and chemical properties as the initial substance? Explain your answer.

4. Cuál es la aplicación de las reacciones de óxido-reducción en la vida diaria y en la industria?

What type of reaction is represented by the following example? H2 (g) + Cl2 (g) - 2HCI (9) AH = - 185 kJ exothermic endothermic

Which of these statements about reaction rates is accurate? (a) All chemical reactions occur at different rates. (b) All chemical reactions occur at the same time. (c) All chemical reactions occur at a slow rate.

The ratio of chlorine to hydrogen chloride in the reaction H2 (g) + Cl2 (g) - > 2 HCl (g) is

Each degree on the Kelvin scale equals: 1°C 10°C no relationship (different scale) 100°C

2C (s) + 2H2 (g) → C2H4 (g) : ΔH = + 52.4 kJ/mol Which statement about this reaction is correct?

A chemist dissolves 660. mg of pure hydroiodic acid in enough water to make up 300. mL of solution. Calculate the pH of the solution. Round your answer to 3 significant decimal places.

What type of radiation wave from the Sun does this graphic display? answer choices: x rays microwave visible ray infrared ray

What is the charge associated with each side of the HCl molecule?