Which of the following words best describe scientists current knowledge about the universe

a) eternal

b) static

c) unpredictable

d) changing

Why does chemistry affect all aspects of life and most natural events?

Analysis of a compound indicates that it contians 1.04 g k, 0.70 g cr, and 0.86 g o. find its empirical formula. 1. k2cro3 2. kcro4 3. k2cro4 4. kcro3

The out side t layer is the linnets layer in the earth

Which is a chemical change, water boiling, wood burning, glass breaking, ice melting, or molding iron?

Which of the molecules represented below contains carbon with sp2 hybridization? (A) CH4 (B) CH2Cl2 (C) C2H6 (D) C2H2Cl2 (E) C2H4Cl2

Samuel adds a teaspoon of salt to a glass of water. He notices that the song disappears. Samuel takes a sip to discover that the water taste salty. What kind of change has occurred?

How are the physical and chemical properties of atoms represented on the periodic table of elements

how do we know isotopes exist?

Is albinism a dominant or recessive trait

If T = dominant, and t = recessive, what would the genotypes be?