Calculate the mass of water produced when 3.8 x 103 grams of C6H12O6 are reacted with excess oxygen gas (O2). Assume the products are those expected for a typical hydrocarbon combustion, CO2 and H2O.

The empirical formula for a compound that is 36.80% sodium and the balance (the rest) selenium is NaxSey where the ratio x:y is

10.00 grams of C2H6 reacts with 10.00 grams of elemental oxygen in a typical combusion reaction. Write down the balanced reaction and determine which reactant is the limiting reagent.

In the reaction of aqueous solutions of strontium sulfide with magnesium sulfate the correct complete ionic equation is

please hepl i dont understand

Assume that you are interested in estimating the effects of schooling on earnings and that you have individual data on schooling and earnings.

a) Set up an empirical model that captures the correlation between schooling and earnings and describe this. Why are you likely to overestimate the true effects of schooling on earnings with this model?

b) How would you go about to estimate the causal effects of schooling on earnings if you as a researcher had the authority to do whatever you like? You do not need to consider any ethical or financial restrictions. Describe how you would go about and why it would work using your own words.

Assume that you are interested in estimating the effects of schooling on earnings and that you have individual data on schooling and earnings.

a) Set up an empirical model that captures the correlation between schooling and earnings and describe this. Why are you likely to overestimate the true effects of schooling on earnings with this model?

b) How would you go about to estimate the causal effects of schooling on earnings if you as a researcher had the authority to do whatever you like? You do not need to consider any ethical or financial restrictions. Describe how you would go about and why it would work using your own words.

Complete combustion of a 0.0150 mol sample of a hydrocarbon, CxHy, gives 3.024 L of CO2 at STP and 1.891 g of H2O.

(a) What is the molecular formula of the hydrocarbon?

(b) What is the empirical formula of the hydrocarbon?

A 0.500-L bulb containing Ne at 685 torr is connected by a valve to a 2.50-L bulb containing CO2 at 375 torr. The valve between the two bulbs is opened and the two gases mix. The initial gas pressures as known to three significant figures.

(a) What is the partial pressure (torr) of Ne?

(b) What is the partial pressure (torr) of CO2?

(c) What is the total pressure?

(d) What is the mole fraction of Ne?

5. Part a: Use the equation of exchange to derive a relationship between the inflation rate and the growth rate of the money stock. What assumptions did you make?

Part b: Milton Friedman stated, “Inflation is always and everywhere a monetary phenomenon in the sense that it is and can be produced only by a more rapid increase in the quantity of money than in output.” Consider the following.

i) Since 2006, what has been the behavior of the monetary base? ii) Since 2006, what has been the CPI inflation rate?

Support your answer with graphs.

Explain the divergence of the empirical evidence and the theoretical predictions regarding inflation.

14. Explain the possible consequences of not using the degrees of freedom when calculating the sample standard deviation?

16. A researcher tested two groups (females and males) of rats on memory performance. The following scores are for the number of correct choices they made on the task:

Females       Males
9                    8
7                    6
7                    8
8                    6
9                    7
8                    6
9                    9
9                    6

Calculate the standard deviation for each group.
Which group shows more variability in their memory scores?         

18. Using the Empirical Rule how much of the population is found in the 1st, 2^nd and 3^rd standard deviation?

Choose a binomial probability experiment. You could flip a coin, or toss a basketball from the free throw line and see if you make the shot or miss, or choose another experiment where the outcome is a success or failure (only two possible outcomes.) 1) Make a guess about the probability of success before doing the experiment. 2) Repeat the experiment 50 times, and record the results. 3) Calculate the empirical probability of success, and compare it to your original guess. Were you close or were you far off? 4) Write a paragraph explaining how you did the experiment and comparing your results to your guess

Suppose that country A has total labour force of 10,000,000 people, but 5% of these people are just seeking jobs (those just graduate from college for instance). Another 2,000,000 people who are over 16 years old and has ability to work but reluctant to work.

1. Calculate labour force participation rate (LFPR) for country A.
2. In empirical research, lots of researchers found that female participation rates increase dramatically from 1950 to 2011. Please indicate five factors that contribute to this trend, and briefly explain each factor.

Just need to answer question b. PLS type or write clearly, thx.

write an essay of 1500 words about the following:

In view of distortions and imperfections of the real world discuss whether regulating international trade will always inevitably be based on the "second best policy" choice as opposed to the "first best". YOUR ANSWER SHOULD INCLUDE:

A. an explanation of first best- second best world (distortions and imperfections).

B: an explanation of first best - second best policies.

C: an argument on regulating international trade (empirical evidence from WTO attempts to reduce protectionism).

D: why second best is an inevitable route for international trade.

E: how and why free trade (first best) is seen as the ideal form.

A pair of dice are rolled​ 1,000 times with the following frequencies of​ outcomes:

Use these frequencies to calculate the approximate empirical probabilities and odds for the events a. The sum is less than 3 or greater than 9.

b. The sum is even or exactly divisible by 5.

a. Probabilityequals = ___???

​(Type a​ decimal.)

Odds for = ____??

​(Type a fraction. Simplify your​ answer.)

b. Probabilityequals = ___???

​(Type a​ decimal.)

Odds for = ____??

​(Type a fraction. Simplify your​ answer.)