General Chemistry Answers

Determine the Keq for the following equilibrium:

2CH4(g) ⇌ C2H2(g) + 3H2(g)

(CH4 = 2.5 x 10-3 M ; C2H2 = 0.01375 ; H2 = 0.04125)

Find the formula of the compound with the percent composition shown

O, 41.26

P, 19.97

Ca 38.76

In a reaction between Mg and hydrochloric acid:

Mg(s) + HCl(aq) —> MgCl₂(aq) + H₂(g)

Given the data below. Examine the data. What is the average rate of reaction?

Time

2

6

8

Mass of Magnesium

0.012

0.010

0.006

0.004

1. A gas has a pressure of 699.0 mm Hg at 313 K.  What is the temperature at standard pressure 760 mmHg?

A 10cm long cleaned Magnesium strip is heated in a crucible until get a fixed mass.if the weight of the crucible is 15.65g and the weight of magnesium strip with crucible is 16.13g,the mass of oxide in grams

Write the equilibrium constant expression for each of the following reactions.

1. H2(g) + I2(g) ⇌ 2HI(g)

2. 3O2(g) ⇌ 2O3(g)

3. 2CO2(g) ⇌ 2CO(g) + O2(g)

4. CH3COOH(aq) + C2H5OH ⇌ CH3COOC2H5(aq) + H2O(l)

5. AgCl(s) ⇌ Ag+ (aq) + Cl-(aq)

metal block has a mass of 50g and a volume of 10 cm what is the density of the block

Convert 37 (µmol/L) of sulphate to mg/l.

Unit conversion for Soluble Reactive Silica (SRSi)

1. 25.5 μmol L^-1 to (mg l-1)
2. 0.82 (mg l-1) to μmol L^-1

Unit conversion for Soluble Reactive Phosphorus (SRP PO4-P)

Convert the following:

1. 9706.7 (mg/m²) to (μg 1^-1)
2. 6.4 (μg 1^-1) to (mg/m²)
3. 0.04 mg/l to (μg 1^-1)