which of these pairs of elements is most likely to be a part of a polyatomic ion? k an cl li and br p and o Ca and O

Why do gases exert pressure on the container? * The gas particles hit each other. The gas particles move quickly in all directions. The gas particles hit the container wall.

Convert each of the following to mass in grams, 4.25 time 10 to the 23 atones N

Which two of these are chemical reactions? Tick two boxes. You dissolve a spoonful of sugar in water. Bread goes brown in the toaster. You take an ice lolly out of the freezer and it strats to melt. Frost forms on the grass an a cold night.

Given 0.1 M solutions of acetic acid (pKa 4.76) and sodium acetate, describe the preparation of 1L of 0.1 M acetate buffer at a pH of 4.0

When an organism from a higher trophic level eats an organism from a lower trophic level all of the energy is converted to mass. all of the energy is converted to heat. most of the energy is converted to mass. most of the energy is converted to heat.

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?