My Paper Writer » Essay Blog » Scientific Paper Writing Service » Chemistry homework questions

Chemistry homework questions

  1. Complete the following for the compound potassium chromate.

    formula = K2CrO4

atomnumber in formula
potassium
chromium
oxygen
  1. Complete the table below for calculating the formula weightof the ionic compound magnesium chlorideMgCl2.

 

SymbolAtomic WeightNumber of ionsWeight of Ions
CationMg2+ amu   = amu
AnionCl amu   = amu

 

Formula Weight magnesium chloride =  amu

  1. Complete the table below for calculating the molecular weightof the compound dinitrogen monoxideN2O.
AtomAtomic Weight# AtomsWeight in compound
N amu/atom  atoms  = amu
O amu/atom  atoms  = amu

 

molecular weight dinitrogen monoxide =  amu

  1. A. How many molesof sulfur hexafluoride, SF6, are present in 4.95 grams of this compound?

moles

  1. How many gramsof sulfur hexafluoride are present in 17 moles of this compound?

grams

10.

  1. 12.

True or false

The number of C atoms in the reactants is greater than the number in the products. _______ true false

The number of O atoms in the reactants is greater than the number in the products. _______ true false

The illustration represents a valid chemical transformation.  True or false

14.

15.

16.

17.

  1. When the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are:

    NO(g) + H2(g)  N2 (g) + H2O (l)

  2. When the following molecular equation is balanced using the smallest possible integer coefficients, the values of these coefficients are:

    SO2(g) + O2(g)  SO3 (g)

20.

Last Updated on September 24, 2018

Don`t copy text!