A rectangular piece of platinum has dimensions of 3.50 cm*2.16 cm*1.08 cm and weighs 175.5 g. What is the density of platinum?

One mole of N2 gas at STP will occupy what volume? A.) 44.8 L B.) 22.4 L C.) 44.2 L D.) 88.4 L E.) none of the above

Which compound contains both covalent and isotonic bonds? A) CaCO₂ B) CO₂ C) H₂O D) NaCl

Why should your disposal of excess magnesium take place in a fume hood? (choose all that apply) Group of answer choices The quench released hydrogen gas, which is flammable and explosive The quench is highly exothermic and might cause the solvent to

What is a symbol? A. a repeated element B. a message or main idea C. something that is used to stand for something else D. the main idea

How do I commit soup of side?

The mass of a solid copper penny is 3.46 g. how many copper atoms are in the penny?

Consider a situation in which 211 g g of P4 P 4 are exposed to 240 g g of O2 O 2 . What is the maximum amount in moles of P2O5 P 2 O 5 that can theoretically be made from 211 g g of P4 P 4 and excess oxygen?

What is the total pressure when 0.400 g of H2, 2.00 g of N2, and 10.5 g of CO2 are injected into a 10.0 liter flask at 273 K?

The balanced chemical equation for the combustion of methane is: CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g) Which of the following statements concerning this chemical equation is/are correct? 1.

In one kind of nuclear reaction, two nuclei fuse, or join together, to form a larger nucleus. This kind of reaction happens only at very high pressures. Explain why such high pressures are necessary to cause these reactions to occur.