Which of the following is an element? salt iron sand

There us no sound in the vacuum of space Why? Answer all that are correct A) sound must travel through something that vibrates B) there is no energy in space C) there is no air to vibrate in the human eardrum

A ringers solution for intravenous fluid replacement contains 155 mEq of Ca2 + per liter of solution. if a patient receives 1850 mL of Ringer's Solution, how many moles of calcium ions were given?

What did Dimitri meandered discover

What type of hybridization is needed to explain why ethyne, C2H2, is linear?

How many covalent bonds are there in one molecule of carbon dioxide, co2?

Running a mile involves

How many calories are there in a 255 Food Calorie snack bar? a. 1 x 103 b. 2.55 x 105 c. 1.07 x 103 d. 60.9 e. none of the above

What is the greatest amount of ammonia (NH3) in moles that can be made with 4.7 mol N2 and 6.9 mol H2? Which reactant is limiting? How many moles of excess reactant will be left after the reaction?

Which one of these elements is an alkaline earth metal

Write the chemical equations for the neutralization reactions that occurred when hcl and naoh were added to the buffer solution.