Predict what event would likely to occur if a sperm contacted an egg of another species? a) Sperm head and egg membranes would not fuse because the binding of a sperm head to a receptor on the egg membrane is species-specific.

b) Acrosomal reaction fail to occur because membrane protein of sperm head is not complementary with receptor on the zona pellucida between gametes of different species.

c) Binding between sperm and egg of different species may occur because the binding of a sperm head to a receptor on egg membrane is species-specific.

d) Cortical granules will release enzyme to destroy sperm receptor and harden the zona pellucida

Acurium-245 nucleus is hit with a neutron and changes as shown by the equation. complete the equation by filling in the missing parts. 52

In the following table, all the columns for the element calcium are filled out correctly. element electron structure of atom electron structure of ion net ionic charge calcium 1s22s22p63s23p64s2 1s32s22p63s23p64s1 +1 true false

These questions are based on the attached photo. the experiment is about burning magnesium metal with oxygen. 1. write the balanced chemical equation for the reaction you are performing. 2. calculate the mass of magnesium metal used in each trial. o trial 1: o trial 2: 3. calculate the actual yield of magnesium oxide for each trial. o trial 1: o trial 2: 4. magnesium is the limiting reactant in this experiment. calculate the theoretical yield of mgo for each trial. o trial 1: o trial 2: 5. determine the percent yield of mgo for your experiment for each trial. o trial 1: o trial 2: 6. determine the average percent yield of mgo for the two trials. your company currently uses a process with a similar cost of materials that has an average percent yield of 91 percent. if the average percent yield of this process is higher than that, this could save the company money. what is your recommendation to the company? support your recommendation using your data, calculations, and understanding of stoichiometry gathered from this lab.