A block of an unknown substance has a mass of 13.7 g. When 64.9 J of energy is put into this block, the temperature is raised from 28.0°C to 37.8°C.

What is the heat capacity of this substance?
(Report numerical answers to 3 digits)

(Need help with steps please!! Struggling )

Base your answer on the information below and on your knowledge of chemistry. nitrogen dioxide, no2, is a dark brown gas that is used to make nitric acid and to bleach flour. nitrogen dioxide has a boiling point of 294 k at 101.3 kpa. in a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, n2o4. this equilibrium is represented by the equation below. 2no2(g) n2o4(g) + 58kj at standard pressure, compare the strength of intermolecular forces in no2(g) to the strength of intermolecular forces in n2(g).

Calculate the mass of silver needed to react with chlorine to produce 126g if silver chloride?

Areaction is first order with respect to reactant x and second order with respect to reactant y. which statement describes the rate law for this reaction?