What are the number of protons, neutrons and electrons in the this isotopes

89

Sr

38

Mixtures are 'separated through ._changes. compound physical mixtures

when mercury (II) oxide is heated it decomposes into mercury and oxygen gas how many molecules of oxygen gas are produced if 23.0g of mercury (II) oxide are heated

What gives water the energy to flow through the stages of the water cycle?

Find the final equilibrium temperature when 10.0 g of milk at 10. c is added to 1.60 x 10^2g of coffee with a temperature of 90.0c assume the specific hw=eats of coffee and milk are the same as for water

Which of these is a major source of organic compounds? petroleum coal natural gas all of these

A Material made of equal parts is called what? A. Atom, B. Pure substance, C. Mixture

Part C Why are dichotomous keys useful in classifying a new species?

2. How is the frequency of a wave determined?

Ammonium acetate chemical formula

Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C has decayed to 1/4.00 of the original amount. How long ago was this plant alive?