Identify if the following statements refers to 

Divides through the process of mitosis:   Answer Two eggs released at ovulation:   Answer One egg is fertilized:   Answer Are always the same gender:   Answer Genetically unique:   Answer Genetically identical:   Answer More common in women who undergo fertility treatment:   Answer Share a placenta:   Answer 

1. The sum of a geometric series is 126. The first term and the common ratio are both 2. How many terms are in the series?

2. Determine t7 of a geometric sequence, where r = 5 and t1 = 2. 

3. Determine the number of terms, n, and the sum, Sn , of the following series. 5 + 13 + 21 + … + 149. 

Zn(s) + 1/2O₂ (g) ZnO(s) + 350.5kJ

calculate the standard enthalpy change of reaction when 25.0g of zinc oxide is produced

Zn(s) + O (g) ZnO(s) + 350.5kJ

calculate the standard enthalpy of reaction when 25.0g of zinc oxide is produced. 

Police can estimate the speed a car had been travelling using the length of the skid marks.  One formula used for this purpose is v=-7+8.2 $\sqrt{d}$√ d , where v is the speed, in kilometres per hour, and d is the length of the skid marks, in metres.

c.) What would have been the speed of a car, to the nearest kilometre per hour, that would have resulted in 150m skid marks?

A student set up an electrolytic cell similar to the one in the Electrolysis experiment to collect hydrogen gas over water in a burette, using a small strip of lead metal as the anode (instead of copper). Before the electrolysis, the mass of the lead strip was 9.333 g. A current of 121.1 mA was applied for a period of 3600 seconds, during which time some of the lead metal was oxidized to lead (2+). What was the mass of the lead metal strip at the end of the electrolysis?

Final mass of lead strip = ? g

(calculate your answer in grams, but do not include the units when submitting your response)

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