In which geologic era were the dinosaurs? A. Mesozoic B. Precambrian C. Cenozoic D. Paleozoic

Obi is trying to determine if a powdery, solid substance is an element or a compound. After recording some observations, he strongly heats a sample of the solid over a burner flame.

What 2 properties make capillary action possible

Determine the number of moles of oxygen in 3.20 moles of sodium hydrogen phosphate.

The density of a sample of metal is calculated using these three different sets of dа ta: 2.9 g/mL, 2.8 g/mL, and 3.0 g/mL. If the true density of the metal is 2.1 g/mL, what can be said about these calculated density values?

A carbon-carbon triple bond is found in a molecule of (1) butane (3) butene (2) butanone (4) butyne

During which phase change does the arrangement of water molecules become more orderly A.) melting B.) subliming C.) boiling D.) condensing

What's the difference between Mixture and Solution?

Which describes the alkalaine solution? A) pH less than 7 B) pH equal to seven C) basic D) acidic

Limestone is primarily a crystal form of caco 3 . How many moles of oxygen are in a 1.25 mol sample of caco 3 ? Only include the numerical value in your answer. Do not include units.

The expression of 5522 km in scientific notation is