Author: Anonymous

Perform the following calculation.(18.245 − 2.7) ÷ 36.812

Explain what the numbers placed in front of formulas (coefficients) represent in a balanced equation.

Write the correct formula for the following compounds.A) Hydroselenic acid: ___B) Aluminum sulfide: ___C) Dinitrogen pentoxide: ___D) Iron (II) oxalate: ___E) Phosphoric acid: ___ NOTE: Chemical formulas typed without proper formatting (“H2O”) will be marked incorrect.NOTE: To insert a subscript use the down “

Classify each as a solid, liquid, or gas at room temperature.A) helium in a balloon: [response_blankA]B) a metal spoon: [response_blankB]C) orange juice in a glass: [response_blankC]

Which of the following is not true about the following reaction?N2(g) + 3 H2(g) → 2 NH3(g)

Write the coefficients (in order) needed to balance the equation. Separate the coefficients with a comma (e.g. 1, 2, 3). Physical states do not need to be included.__(NH4)3PO4 + __CaCl2 → __NH4Cl + __Ca3(PO4)2[response_blankA]

Write the coefficients (in order) needed to balance the equation. Separate the coefficients with a comma (e.g. 1, 2, 3). Physical states do not need to be included.__P2 + __H2S → __P2H4 + __P2S4[response_blankA]

Explain what it means for an ionic compound to be soluble when placed in water.

Perform the following calculation.(52.418 − 7.6) ÷ 128.34

Write each number in scientific notation.A) 0.0090400: [response_blankA]B) 376,000: [response_blankB]C) 450.: [response_blankC]