Calculate the total heat (joules) of formation for 30 grams of water that is heated from 32C to 48C

Which information in the periodic table indicates the number of protons in an atom? A. the position of the element in its column B. the element's chemical symbol C. the element's atomic mass D. the element's atomic number

What is the name of the compound shown by the formula P, 0,?

A 5.0 g sample of aluminum with a specific heat of 0.90 J / (g °C) was heated from 22.1°C to 32.1°C. How much heat, to the nearest joule, did the aluminum gain?

Which substance can be broken down by chemical means? 1) Magnesium 2) Manganese 3) Mercury 4) Methanol

Which statement applies to electronegativity? A) Electronegativity increases across a period. B) All atoms with the same number of electron shells have equal electronegativities.

How does Earth rotation cause day and night? A) As Earth rotates toward the east, the sun appears to rise in the west and set in the east.

The standard internal energy change for a reaction can be symbolized as ΔU°rxn or ΔE°rxn. For the following reaction equations, calculate the energy change of the reaction at 25 °C and 1.00 bar. Sn (s) + Cl2 (g) - - - > SnCl4 (l) + H (KJmol) - 511.3.

Which of the following is a characteristic typically not used to classify biomes? a. climate b. vegetation c. temperature d. geography

3. Hydrochloric acid is used to clean metals. The acid reacts with the oxide layer on the surface of the metal, forming a salt and water. Which word describes the metal oxide? A alloy B base C element D indicator

How many chlorine atoms are expected in the products of this chemical reaction? 2Sb + 3Cl2?