Significant figures are an indicator of the certainty in measurements true or false?

Drinking water and air are both an example of a substance. True or false

A cells that carry information through tour nervous system

During normal miotic cell divison, a parent cell that has four chromosomes will produce two daughter cells each containing what

What substances dissolve in water?

Nitric oxide, no, is made from the oxidation of nh3, and the reaction is represented by the equation 4nh3 + 5o2? 4no + 6h2o an 9.5-g sample of nh3 gives 12.0 g of no. the percent yield of no is :

In a motion diagram the size of the object must be less than the distance moved t or f

Which part of an atom is directly involved in chemical changes

Electrons are capable of emmiting engery in the form of light at very narrow ranges of wavelengths. these wavelengths can be measured to find the electrons? A) mass B) density C) energy level D) specific heat

How many grams of AlF3 are in 2.64 moles of AlF3?

The decay of which radioisotope can be used to estimate the age of the fossilized remains of an insect? (1) Rn-222 (3) Co-60 (2) I-131 (4) C-14