What is the relationship between matter and elements

The mass of a length of metal wire is 45 g. When the wire is placed in a graduated cylinder with water, it displaces 5 mL of water. What is the density of the metal? A. 0.1 g/cm3 B. 9 g/cm3 C. 40 g/cm3 D. 225 g/cm3

A gas has a pressure of 75 KPa and a volume of 33 Liters. What's the new pressure if the volume is changed to 55 Liters?

What would you observe in a solution of 30 g of KC1O3 in 100 g of water at 10 c? a. about 5 g of the KC1O3 is dissolved b. about 20 g of the KC1O3 is dissolved c. all of the KC1O3 is dissolved d. none of the KC1O3 is dissolved

Which of the following shows the correct order of increasing lattice energy for the given compounds? A. Na2O < K2O < Li2OB. K2O < Na2O < Li2OC. Na2O < Li2O < K2OD. Li2O < Na2O < K2O

How is carbon dioxide formed

The reaction 2HgO (s) ↽⇀ 2Hg (l) + O2 (g), you produce 1 mole of Hg (I). What is your percentage yield? A) 30% B) 20% C) 50% D) 100%

What are the concentrations of Cu2+, NH3, and Cu (NH3) 42 + at equilibrium when 18.8 g of Cu (NO3) 2 is added to 1.0 L of a 0.

Estimate the optimal number of neutrons for a nucleus containing 70 protons.

Students conduct an experiment in which steel wool is burned in a closed test tube. The steel wool reacts with an amount of oxygen equal to 1.43% of the mass of the steel wool. What is the correct value for the missing mass in the table?

Which of the following properties of water allows an insect to "climb" up a tube? Capillary action Cohesion Adhesion Density