What type of observation can be stated with just numbers? A. Qualitative
B. Sensory
C. Behavioral
D. Quantitative

Which statement is true about hcl? (5 points) select one: a. it is a salt because it increases the concentration of metallic ions. b. it is a salt because it is formed by the reaction of an acid and a base. c. it is an acid because it increases the concentration of hydroxyl ions. d. it is an acid because it increases the concentration of hydronium ions.

Marcel just purchased 1.69 grams of iron fillings in order to make living putty for his 6 year old niece. how many moles of iron are made in his sample?

To calculate percent by mass, use the equation below: calculate the percent by mass of each element. %n = % %h = % %o = %