Questions
A sample of an unkown metal is reacted with hydrochloric acid and collected over water in a 50.00mL buret.

 

A sample of an unkown metal is reacted with hydrochloric acid and collected over water in a 50.00mL buret. Given the balanced chemical equation, determine the empirical molar mass and identify the metal: 2X(s)+2HCL(aq)->2XCL(aq)+H2(g)

Mass of X 0.0636g
Volume of unmarked region of buret 5.2mL
Volume of meniscus (final)

19.77mL

Volume of difference of heights of water 13.00cm
Temperature 24.5°C
Corrected Barometric pressure 757.2 torr

In: Chemistry

Using the empirical rule, 68% of male sleep amounts should be between what two values? Either...

Using the empirical rule, 68% of male sleep amounts should be between what two values? Either show work or explain how your answer was calculated. (need to be able to show the work as a typed out problem in Word, so if possible type out the solutions and formulas so that there are easier to read)

7

5

8

8

6

8

8

8

10

7

7

4

9

8

7

8

8

10

In: Statistics and Probability

What is the burden rate? What is the direct rate? What are the most common burden...

What is the burden rate? What is the direct rate? What are the most common burden rates? What does it mean when a burden rate is empirical? Provide the full burden rate for a labor resource at an hourly rate of 43.25 given a Direct labor overhead rate of 80%, general and Administrative Rate of 15%, Profit Rate of 25%, and a Fee rate of 3%? What is the multiplying Factor? Make sure you define all terms and provide all calculation

In: Accounting

Fill in blanks. Suppose that the weights of all men are normally distributed with mean =...

Fill in blanks. Suppose that the weights of all men are normally distributed with
mean = 140 lb and standard deviation = 8 lb. According to the Empirical Rule,
a. Approximately 68% of all men have weights between.............. and................... .
b. Approximately 95% of all men have weights between................... and.................. .
c. Approximately............... % of all men have weights between 116 lb and 164 lb.
d. If Mr.L weighs 130 lb, find its z-score z =...............

In: Statistics and Probability

What is probability, what can it values be, and what those values can mean (i.e. unusual,...

What is probability, what can it values be, and what those values can mean (i.e. unusual, rare, likely, impossible, certain, uncertain). Also, what are the differences between empirical probability and theoretical probability. Next what is the addition rule and the multiplication rule. How can you tell the difference between them and when to use them? Also, what do the terms mutually exclusive/disjoint and independence and dependence events mean? How do they differ?

In: Statistics and Probability

HCN forms when synthetic fibers containing Orlon® or Acrilan® burn. Acrilan® has an empirical formula of...

HCN forms when synthetic fibers containing Orlon® or Acrilan® burn. Acrilan® has an empirical formula of CH2CHCN, so HCN is 50.9% of the formula by mass. A rug in the laboratory measures 12.0× 12.0 ft and contains 30.0 oz of Acrilan® fibers per square yard of carpet. If the rug burns, what mass of HCN will be generated in the room? Assume that the yield of HCN from the fibers is 20.0% and that the carpet is 41.0 % consumed.

In: Chemistry

Assume X ~ ? (10, 4) where ? implies unknown. 1. What is the (approximate) distribution...

Assume X ~ ? (10, 4) where ? implies unknown.

1. What is the (approximate) distribution of x if the sample size is 100? Briefly discuss the theorem underlying your answer.

2. What happens to the variance of x as the sample size increases? Draw a diagram and explain.

3. What two values of x (symmetric around the population mean) contain a) 75% and b) 95% of the distribution? Draw a diagram. Relate your answer to b) to the empirical rule.

In: Statistics and Probability

Here is a sample dataset: 126.3 258.9 298.4 345.2 89.2 459.2 688.1 441.3 459.2 487.1 647.2...

Here is a sample dataset: 126.3 258.9 298.4 345.2 89.2 459.2 688.1 441.3 459.2 487.1 647.2 784.9 647.2 675.5

(1) Draw a stem - and - leaf display for this dataset.

(2) What is the mean, median, mode?

(3) What is the range, variance, standard deviation?

(4) What is Q1, Q3?

(5) Is the smallest and largest outliers? Why?

(6) What is the percentage falling within 1 standard deviation? Does it satisfy the Empirical Rule?

In: Statistics and Probability

The recent call for Corporate Governance in the financial institution industry aligns with securing the interest...

The recent call for Corporate Governance in the financial institution industry aligns with securing the interest of all stakeholders of the modern corporation. From the financial management perspective, in particular, corporate governance improves financial performance and hence shareholder value maximisation. Empirical evidence in Ghana and beyond, points to the fact that corporate governance, cannot guarantee shareholder value maximisation.

Required                                                          

Provide three arguments for and three against corporate governance in improving financial performance of corporate entities.

In: Finance

The body temperatures of a group of healthy adults have a​ bell-shaped distribution with a mean...

The body temperatures of a group of healthy adults have a​ bell-shaped distribution with a mean of

98.2198.21degrees°F

and a standard deviation of

0.540.54degrees°F.

Using the empirical​ rule, find each approximate percentage below.

a.

What is the approximate percentage of healthy adults with body temperatures within

11

standard

deviationdeviation

of the​ mean, or between

97.6797.67degrees°F

and

98.7598.75degrees°​F?

b.

What is the approximate percentage of healthy adults with body temperatures between

97.1397.13degrees°F

and

99.2999.29degrees°​F?

In: Statistics and Probability