A 155 g sample of an unknown substance was heated from 25°c to 40°c. in the process, the substance absorbed 569 calories of energy. what is the specific heat of the substance?

Why do water and hydrogen peroxide have different properties

The production of low-carbon steel uses oxygen but the production of titanium uses argon. Explain why

What should happen when a piece of copper is placed in 1m hcl? a. the copper is dissolved by the acid. b. the copper is dissolved by the acid with the release of hydrogen gas. c. the copper bursts into greenish flames. d. nothing happens?

Which electron configuration represents the electron of a sulfur atom in an excited state?

The of the ocean floor would be the hardest to recover the cargo from.

Which of the following is an example of a physical change? A) grinding coffee beans B) baking a cake C) converting water to hydrogen and oxygen D) digesting a cheeseburger E) burning coal

Which substance is a combination of different atoms? homogeneous mixture heterogeneous mixture element compound

What is the mass of 3.75 moles of NaCI? (Na = 22.99g/mol, CI = 35.45 g/mol)

Convert to grams 0.100 moles of Co2

In order to use the value 22.4 L for molar volume in a mass-volume or volume-mass stoichiometry problem, the gas must be assumed to be at STP. A. True B. False