Both kelp and diatoms are classified

The student realizes that the precipitate was not completely dried and claims that as a result, the calculated Na2CO3 molarity is too low. Do you agree with the student's claim? Justify your answer

How many atoms are in each of the following? a) 1.0g of hydrogen atoms, each of mass 1.0u b) 12.0g of carbon atoms, each of mass 12.0u c) 23.0g of sodium atoms, each of mass 23.0u

2. Identify items in your life that are made of each type of element: metal, nonmetal, and metalloid. For each item, explain why the properties of that type of element are necessary for the function of that item.

A large weather balloon requires plenty of helium gas in order to ascend into the atmosphere to take measurements.

A gas cylinder contains 15 moles of 02. How many molecules of oxygen are in the cylinder

A liquid would boil at the lowest temperature at a pressure of

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?