Identify the solids and explain your answers

Assignment Help Chemistry

Reference no: EM13113541

A student is given four solid samples labeled W, X, Y, and Z. All have a metallic luster. She is told that the solids could be gold, lead sulfide, mica (which is quartz or SiO2), and iodine. The results of her investigations are: (a) W is a good electrical conductor; X, Y, and Z are poor electrical conductors. (b) When the solids are hit with hammer, W flattens out, X shatters into many pieces, Y is smashed into a powder, and Z is not affected. (c) When the solids are heated with a Bunsen burner, Y melts with some sublimation, but X, W, and Z do not melt. (d) In treatment with 6 M HNO3, X dissolves; there is no effect on W, Y, or Z. On the basis of these test results, identify the solids and explain your answers.

Reference no: EM13113541

Questions Cloud

Is the normal approximation for the proportion valid : Suppose that we are interested in the proportion of the 70 students in the lunchroom cafeteria that smokes. Is the normal approximation for the proportion p = r/n valid?

How the electron configurations end : Li is in row 2 of the periodic table, Na is in row 3, and K is in row 4. How do their row numbers affect how their electron configurations end.

Question regarding two-tailed test : How to decide whether your test should be one-tailed or two-tailed/directional or non-directional. Gives an example of each type, with an explanation of why it is/is not directional.

Information about inferential tests : An analyst working at BC Statistics is compiling a report on the use of the internet at home. In 1997, 250 randomly selected people were asked about the average amount of time spent on the internet per week.

Identify the solids and explain your answers : A student is given four solid samples labeled W, X, Y, and Z. All have a metallic luster. She is told that the solids could be gold, lead sulfide, mica (which is quartz or SiO2), and iodine.

What is the value of b in the regression : A regression of height (X, in inches) on hourly earnings (Y, in dollars), yields the following results: What is the value of b1 in the regression Y = b0 + b1X?

Hypothesis test-independent samples t-test : Ms. Lisa Monnin is the budget director for the New Process Company. She would like to compare the daily travel expenses for the sales staff and the audit staff. She collected the following sample information.

Developing null and alternative hypotheses : Develop null and alternative hypotheses to help the bank determine which option would provide the best incentive to consumers.

Find probability that all selected workers from day shift : How many selections result in all 6 workers coming from the day shift? What is the probability that all 6 selected workers from the day shift?

User Account

All Pages