The ratio of hydrogen atoms to sulfur atoms in sulfuric acid, H2SO4 is

Classify each substance below as an atomic element, a molecular element, a molecular compound or an ionic compound. CO2- Ag- KCl- F2- I2- HBr- Cr- Al2O3-

How many moles of co2 are produced when 2.5 moles of o2 react?

Which one of the following steps is not a part of the scientific method a - perform experiments to test the predictions b - repeat the experiments until the answers match the predictions c - formulate a general rule based on the predictions and

Select the correct answer. Why is the melting of ice a physical change? A. It changes the chemical composition of water. B. It does not change the chemical composition of water. C. It creates new chemical bonds. D. It forms new products. E.

Why does Beryllium have a larger first Ionization energy than boron?

A voltaic cell is constructed with two silver-silver chloride electrodes, each of which is based on the following half-reaction: AgCl (s) + e-→Ag (s) + Cl - (aq). The two cell compartments have [Cl-] = 1.51*10-2 M and [Cl-] = 2.90 M, respectively.

How many liters of chlorine gas can be produced when 0.98 l of hcl react with excess o2 at stp? 4hcl (g) + o2 (g) - > 2cl2 (g) + 2h2o (g) ?

In the reaction of 1.15 g of salicylic acid, molar mass 138.12 g/mol, with 2.83 g of acetic anhydride, molar mass 102.10 g/mol, a student obtained 1.21 g of acetylsalicylic acid, molar mass 180.17 g/mol. What is the percent yield?

A sample of hydrated calcium sulfate has a mass of 20.88 g. After it is heated, it has a mass of 16.51 g. What is the percentage by mass of water in the hydrate

All organisms need energy from food in order to survive. Plants produce their own food through photosynthesis. Animals must find external sources for food. Which of the following is true? A. Plants are autotrophs, and animals are heterotrophs. B.