Chemistry Answers

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

The Haber process was one of the most crucial breakthroughs in chemical science resulting from research aimed to avoid widespread famine at a time of massive population growth. The reaction conditions are optimal at 400  C, at 200 atmospheres of pressure, in the presence of a catalyst. If the partial pressure of N2(g) is 43.5 atm and H2(g) is 87.0 atm.,

N2(g) + 3H2(g) <-->  2NH3(g)

What is Kp for this reaction at this temperature?  (enter the answer as a decimal to four significant figures)

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

8. What is [H3O+] for a 0.500 M solution of hydrochloric acid? Make sure you include the ionization equation. (2 marks)

9. If 2.50g of the strong base lithium hydroxide is dissolved in 1.50 L of solution, what is the concentration of hydroxide ions? Make sure you include the dissociation equation. (3 marks)?

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