Show:
nj ask practice
nj ask practice
100
which of the following correctly compares the elements on the right side of the peoriodic table with the elements on the left side of the periodic table
What is the element on the left side are better conductrs of electricity than the elements on the right side.
100
which equipment will best separate a mixture of sand and sugar?
What is filter paper, water , and beakers
200
which of the following is a property of fluorine (f), a nonmetal?
What is it is a gas at room temperature and pressure.
200
five molecules of methane contain five carbon atoms and 20 hydrogen atoms. what is the chemical formula of methane
What is C5H20
300
which element is least likely to combine with another element to form a molecule?
What is neon (Ne), a noble gas
300
Dr.Halite combined sodium metal with chlorine gas to make sodium chloride (table salt). The chemical reaction used up all of the metal and all the gas. if Dr.Halite made 116 g of table salt and started with 68 g of chlorine gas, then how many grams of sodium metal did he start with? describe the law of nature that supports your answer.
What is 48 grams are left
400
a certain molecule has ratio of one atom of element X for every two atoms of element Y. suppose a sample of elements X and a sample of element Y react to form exactly 1 kg of XY 2 , with no reactant left over. wich of the following could be the amount of X and Y in the reaction
What is 200 g of X and 300 g of Y
500
which of the following is an example of a chemical change?
What is a solid rock melting into magma