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Explain your response to the following completely and in easy to understand language. There is controversy surrounding genetically modified crops. To make informed decisions, scientists must weigh the pros and cons of using this type of biotechnology. Explain why genetically modifying the foods we eat can be both useful and potentially harmful.
How does nuclear magnetic resonance imaging allow us to see inside human bodies? In what other ways do you think this technology could be used
How many neutrons are there in an atom of lead whose mass number is 208? A) 82 C) 208 E) none of them B) 126 D) 290 8. Atoms of the same element with different mass numbers are called A) ions. C) allotropes. E) isotopes. B) neutrons. D) chemical f..
Using the periodic table as a guide, write the condensed electron configuration for the ground state of Si
A Dewar flask filled with 1.00 L of liquid nitrogen is allowed to completely evaporate and warm up to room temperature (23 oC at 1 atm pressure). What change in volume does the nitrogen undergo and how much work is done by the process
NaOH was added. Assuming no volume change, calculate the pH of the solution
a sample of h2 gas is combined with o2 gas. the combination has a total pressure 820 torr and the o2 gas has a partial
For the substituent in this experiment that was found to be least activating, explain why bromination took place at the position on the ring indicated by the experimental results
Calculate the number of molecules in 9.00 moles H2S. Express your answer numerically in molecules.
Marble (calcium carbonate) reacts with hydrochloric acid solution to form calcium chloride solution, water, and carbon dioxide. What is the percent yield of carbon dioxide if 2.86 g of the gas is collected when 10.3 g of marble reacts
Determine the ph ( to 1 decimal place) of a slution prepered by adding 125ml of 0.759M acetic acid to 10.3g of sodium acetate. the pKa of acetic asid is in table 10.2. Assume the volume of the solution does not change?
Suppose a student mixed 60.6 g of toluene with 48.8 g of nitric acid and recovered 11.5 g of TNT. Find out which was the limiting reagent and Compute the percent yield of the reaction
There are 3 different possible structures for dibromoethene molecule, C2H2Br2.One of them has no net dipole moment, but the other two do. Draw a Lewis strucutre for each isomer. Include H atoms.
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