In which pair do the particles have approximately the same mass?

(1) proton and electron

(2) proton and neutron

(3) neutron and electron

(4) neutron and beta particle

Which of the following is a product formed when NaCl decomposes? A. Na2 B. Nac2 C. cl2

Chemistry to make tomato soup, you add one can of water to the condensed soup. why is this dilution?

Based on the graph, which of these statements is most likely correct about the periods 1800 to 1850 and 1900 to 1950? Select one: a. There was decrease in global temperatures. b. There was increase in global temperatures. c.

Which of the following apply to unsaturated hydrocarbons? Select all that apply. A) they do not have isomers. B) they are more stable than saturated hydrocarbons. C) they will react readily with other elements and compounds.

What is the nuclear charge for argon with 22 neutrons?

Consider the following thermochemical equation: C (s) + O2 (g) → CO2 (g) ΔH = - 393 kJ CO (g) + ½O2 (g) → CO2 (g) ΔH =

Two colorless solutions are mixed together. Bubbles form as the solution is stirred. Give TWO possible explanations for this result.

What is a light-year? A. the distance light travels in one earth year B. the distance light travels from the sun to the earth C. the distance light travels in one orbit of the moon D. the time it takes light to travel across the universe

What's is a logical way that you could begin to investigate why your tire had low air pressure?

after balancing the redox equation FeCl3+Zn--->ZnCl2+Fe, what are the coefficients, in order from left to right?