How did Thomson know the charge of the particle he discovered was negative?

A 44.0 gram sample of an element absorbs 1870 J of energy and increases in temperature from 25.0°C to 75.2 °C. What is the specific heat of the element? What is the element?

Which stereoisomer - cis - or trans-1-bromo-3-tert-butylcyclohexane - will react faster in an E2 elimination reaction? Select the single best answer.

Which of the following statements about the formation of a solution is true?

How molecules of N2 gas can be present in a 2.5 L flask at 50°C and 650 mmHg?

Which term describes the sum of the number of protons and neutrons in an atom?

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.