< Question 23 of 26 > An unknown metal sample with a mass of 14.8 g was obtained. The samp several metals are listed in the table. Metal Density (g/mL) aluminum 2.70 iron 7.87 cobalt 8.90 copper 8.96 gold 19.3 What is the possible identity of this metal sample?

Select the correct answer a modure consists of glucose and water. what is the percent composition of glucose in the mixture if it contains 1.3 moles of glucose (cho total mass of the mature is 276 grams? ) and the a 1775

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)

What is the energy in joules of a mole of photons associated with visible light of wavelength 486 nm?