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Mathematics, 21.06.2019 14:00
(a) calculate the molarity of a solution that contains 0.0345 mol nh4cl in 400 ml of solution. (b) how many moles of hno3 are present in 35.0 ml of a 2.20 m solution of nitric acid? (c) how many milliliters of 1.50 m koh solution are needed to supply 0.125 mil of koh ?
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Mathematics, 21.06.2019 16:30
The average human heart beats 1.15 \cdot 10^51.15β
10 5 1, point, 15, dot, 10, start superscript, 5, end superscript times per day. there are 3.65 \cdot 10^23.65β
10 2 3, point, 65, dot, 10, start superscript, 2, end superscript days in one year.how many times does the heart beat in one year? write your answer in scientific notation, and round to one decimal place.
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Mathematics, 21.06.2019 17:20
Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?
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Mathematics, 21.06.2019 22:00
You're locked out of your house. the only open window is on the second floor, 25 feet above the ground. there are bushes along the edge of the house, so you will need to place the ladder 10 feet from the house. what length ladder do you need to reach the window?
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Evaluate (2-5)(p+q)) when p= 2 and q = 5i....
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