What is the density of iridium metal? (Ir: 192.2 g/mol; face-centered cubic with 3.83x10^-8 cm edges).

You find a white granular substance in a jar in your cupboard. You suspect it may be either sugar or salt. How could you find out without tasting the substance?

In a laboratory experiment, John uses a mesh to separate soil particles from water. Which technique of separation is he using?

If you burn 36.7g of hydrogen and produce 328g of water, how much oxygen reacted?

Which of the following masses is the largest? O 0.020 kg 0 20.0 mg O 0.200 g O 2000 ug

Calculate the equilibrium constant at 25 ∘C for the reaction Fe (s) + 2Ag + (aq) →Fe2 + (aq) + 2Ag (s) Standard Reduction Potentials at 25 ∘C Fe2 + (aq) + 2e-→Fe (s) E∘ = - 0.45 V Ag + (aq) + e-→Ag (s) E∘ = 0.80 V

Name two ways that living things use proteins

Solid lithium metal and diatomic fluorine gas react spontaneously to form a solid product. give the balanced chemical equation (including phases) that describes this reaction.

What is the best way to transform a chemical potential energy into internal kinetic energy?

A reaction starts with 20.0 grams of lithium hydroxide (LiOH) and produces 31.0 grams of lithium chloride (LiCl), what is the percent yield of lithium chloride (LiCl) ? * LiOH + KCl - LiCl + KOH A) 64.5% B) 88.6% C) 81.5% D) 92.8%

You aren't sure if your pH meter needs to be calibrated, so you put it in a buffer solution that has a known pH of 7. You take four separate readings of the solution with the pH meter. The meter reports the pH as 5.5, 8.6, 6.3, and 9.4.