Describe the wavelength and the frequency of light emitted
Describe the wavelength and the frequency of light emitted when an electron changes from n=4 to n=3 in the Haltom and discuss in what region of the spectrum is this radiation found?
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How can estimate the pH of a solution that is prepared by adding the 19.3grams of sodium nitrite (NaNO2) to 500 mL of 0.1 M nitrous acid (HNO2 , Ka = 4.5× 10-4). Suppose there is no change in volume of solution.
The pH of 0.5 M benzoic acid, C6H5COOH, is 2.24. Estimate the difference in pH when the 4.25 g ofC6H5COONa is added to 392.8 mL of 0.50 M benzoic acid. Where the Ka value for C6H5COOH is 6.5 x10-5.
If the standard deviation of the income of US households is $20k, what would be the sample size which the sampling error (the standard deviation of sampling distribution of the sample mean) is $2k?
State total cost of installation as function of x. (you may like select toanswer part (c) before part (b) if you would like to analyze concrete instances before creating equation.)
A sample which is having 1.621 gram of an unknown organic compound having C, H and O only was combusted in the presence of an excess of oxygen gas. Study of the products revealed that 3.095 grams of carbon dioxide and 1.902 grams of water were for
Draw an efficient synthesis to make the decade from the acetylene and 1-butene. Suppose you may use any necessary organic of the inorganic reagent.
If the distribution of the income of US households is approximately normal with the mean = $50k and standard deviation = $20k, determine the approximate probability that in a random sample of 100 US households, your sample mean is less than $46k?
After she hits ball, when will ball hit the ground? How much time will it take if outfield will catch it five feet above ground?
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