General Chemistry Answers

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)

A sample of oxygen gas (O

2

) has a volume of

9

.0 L and a pressure of

2

.0 atm. What is the new

pressure if the volume is decreased to

3

.0 L?

How many moles of Fe are in 210 L of Fe

The following set of lead determinations on separate aliquots of a pooled blood serum were reported: 103,106,107 and 114 meq/ L. One of the values appears suspect. Should the suspected be retained or discarded at 95% confidence level?