A certain satellite orbiting earth has a speed of about 17,000 miles / hour. What is its approximate speed expressed to the correct number of significant figures in kilometers/ second . One kilometer is about 0.62 mile, & there are 3,600 seconds in an hour.

What shape would a molecule with two bound groups and two lone pairs have?

Achemistry student needs to standardize a fresh solution of sodium hydroxide. he carefully weighs out of oxalic acid , a diprotic acid that can be purchased inexpensively in high purity, and dissolves it in of distilled water. the student then titrates the oxalic acid solution with his sodium hydroxide solution. when the titration reaches the equivalence point, the student finds he has used of sodium hydroxide solution.calculate the molarity of the student's sodium hydroxide solution. be sure your answer has the correct number of significant digits.

Which of the following is not true about the atomic model of substances?