nsankey6557 nsankey6557

05-10-2022
Chemistry

Answered

© macmillan learning a sample of drinking water was tested for pb2 pb2 and was found to have a pb2 pb2 concentration of 17.46 ppb.17.46 ppb. a 9.00 ml9.00 ml sample of the drinking water was spiked with 1.00 ml1.00 ml of a 2.28 ppb2.28 ppb pb2 pb2 standard. analysis of the spiked sample gave a concentration of 15.91 ppb15.91 ppb pb2 .pb2 . find the percent recovery of the spike.

Answer :

Other Questions

54 g of water was produced when a sample of methane was burned in an excess of air. What mass of methane was burned assuming complete combustion? Use the inform

A 14.5 gram sample of metal was heated from 26 K to 71 K, a temperature increase of 45.0 K, and absorbed 1432 J of energy as heat. What is the specific heat of

A solution is prepared by adding 1. 60 g of solid nacl to 50. 0 ml of 0. 100 m cacl2. What is the molarity of chloride ion in the final solution? assume that th

Iron (iii) oxide, fe2o3(s), is more commonly known as rust. show all calculations and a full solution in problem solving format. include units and the correct

4.6g of sodium is added to the water. Calculate the mass of water after the reaction. (Na=23, H=1, O=16)

Is the calculated sodium hydroxide concentration higher, lower, or the same as the actual sodium hydroxide concentration in the flask, if the oxalic acid that w

Which statement about the water cycle is correct?(1 point) Responses Plants contribute to the water cycle and animals do not. Plants contribute to the water cyc

calcium hydroxide, also known as slaked lime, is used in industrial processes in which low concentrations of base are required. only 0.16 g of ca(oh)2 dissolves

Methane gas reacts with chlorine gas to form dichloromethane and hydrogen chloride, as represented by the equation below. CH4 (g) + 2 Cl2 (g) → CH₂Cl2 (g) + 2 H

Heavy metal ions like lead(II) can be precipitated from laboratory wastewater by adding sodium sulfide, Na2S. Will all the lead be removed from 12.8 mL of 7.50×