If the pH of a solution was 7 and you were to increase the hydronium ion concentration 1000x, what would the pH be?
A) 4
B) 4 M
C) 1 × 10-4 M
D) 7,000 M
E) 10
A
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There is no evidence in the geologic record that multicelled organisms of any kind existed prior
to the Cambrian. Indicate whether the statement is true or false.
The 2013-2014 Assessment Report concluded that global climate change is caused at least in part by the
A) human use of fossil fuels to generate electricity and power engines. B) human use of chlorofluorocarbons in refrigeration systems. C) harvesting of millions of acres of corn, wheat, and soybeans around the world every year. D) depletion of groundwater supplies.
The Sun is composed almost entirely of two gases. They are ________ and ________
Fill in the blank(s) with correct word
Cite two explanations for the apparent increase in the number of tornadoes in the United States since 1950
What will be an ideal response?