General Chemistry Answers

how many joules of heat are released when 110g of water cools from 91 degrees Celsius to 28 degrees celsius

Calcium chloride is used in the making of cement and as a moisture absorbent. formed in the reaction Ca(OH)2(aq) + 2HCI(aq) → CaCl2s) + 2H2OM. How many moles of calcium chloride would be produced by 8.6 x 1025 moles of hydrochloric acid?

Consider the two reactions:

A + B -> C + D + E + 8F (eq.1)

B + 2C + 3G + H -> 2I + J

Reaction 1 was completed using 22.0g of 'A' and 19.0g of 'B'. The product 'C' was used in reaction 2 along with 12.0g of 'B' and 16.0g of 'G' while 'H' was used in excess. (Molar masses are in table)

a) What is the theoretical yield of 'C' from equation 1?

b) What is the limiting reagent of the second reaction?

c) What is the theoretical yield of 'I'?

Table

Compound Molar Mass (g/mol)

A 192.2

B 125.5

C 82.3

D 65.6

E 41.2

F 16.1

G 112.5

H 78.8

I 344.2

J 18.0

There are 11.7 g of ethane and 30.5 g of oxygen that will undergo combustion

what is the connection between an element's electron arrangement and its Group number?

balance the following reaction that takes place in an acidic solution using the oxidation number method

Fe203(s) + Co(g) >3CO2 +2Fe

Calculate E° for the following:

a.Iron and water to produce iron(II) hydroxide and hydrogen gas.

b.Pt | S2- | S || NO3- | NO | Pt (basic medium).

c.3SO42-(aq)+12H+(aq)+2A1(s) 3SO2(g)+2A13+(aq)

A student prepares a solution of sodium sulfate, Na,SO,, by adding 6.25 x 10-2 mol dm-8

sulfuric acid, H, SO;, from a burette to 25.0 cm° of 0.124 mol dm-3 NaOH in a conical flask.

2NaOH(ag) + HaS0, (aq) -› NaySO,(aq) + 2H, 0()

Calculate the minimum volume of the H,SO, that the student would need to completely react

with the NaOH present.

17. The molecule, acetone, has the following Lewis structure of c3h6o

a. What is the geometry of the first carbon?

b. What are the bond angles around the first carbon?

c. What is the geometry of the middle carbon?

d. What are the bond angles around the middle carbon?

In a saturated solution of Mg(OH)2, the concentration of Mg2+ is 1.31 × 10–4 M. What is the solubility product for Mg(OH)2?