greykangaroo332

If excess aluminum metal is reacted with 19 g of chlorine gas and produces 4 g of aluminum chloride, calculate the percent yield of this reaction.

ARTHROPODA

1. What are the most important anatomical features that the phylum Arthropoda has that differentiates its from the other phylas?

2. What anatomical features does the subphylum Crustacea have that differentiates it from the other subphylas?

3. What anatomical features does the subphylum Hexapoda have that differentiates it from the other subphylas?

4. What anatomical features does the subphylum Myriapoda have that differentiates it from the other subphylas?

5. What anatomical features does the subphylum Chelicerata have that differentiates it from the other subphylas?

What is anatomy

What is biology?

You will receive credit for an original posting (paragraph format using minimum of 400 words submission).

Discuss the causes and effects of air and water pollution/waste, and describe strategies that people can take to protect these resources. If everyone could just do three things to help out the environment what would you suggest? Why?

A gene has the following DNA sequence: ATTATTCG

A mutation occurs that replaces cytosine with thymine. What mRNA sequence corresponds to the new, mutated, DNA sequence?

Three gases, nitrogen, helium, and krypton are confined in a 9.00 Lvessel at a pressure of 7.00 atm. The vessel contains 5.00 moles ofnitrogen, 2.00 moles of helium, and 2.00 moles of krypton. What isthe partial pressure of helium?

1. Partial pressure of helium = ? atm

Now suppose that 8.00 moles of neon are added to the vessel withoutchanging the volume or temperature. What is the partial pressure ofhelium now?

2. Partial pressure of helium after addition of neon = ? atm

Now suppose that an additional 5.00 moles of helium are added tothe vessel, again without any change in the volume or thetemperature. What is the partial pressure of helium now?


3. Partial pressure of helium after addition of 5.00 more moles ofhelium = ? atm

hreegases, nitrogen,argon,and methaneareconfined in a 10.0L vesselat a pressure of 9.00atm. Thevessel contains 4.00molesof nitrogen,5.00molesof argon,and 4.00molesofmethane.What is the partial pressure of methane?

Partialpressure of methane=atm

Nowsuppose that 7.00molesof neonareadded to the vessel without changing the volume or temperature.What is the partial pressure of methanenow?

Partialpressure of methaneafteraddition of neon=atm

Nowsuppose that an additional 4.00molesof methaneareadded to the vessel, again without any change in the volume or thetemperature. What is the partial pressure of methanenow?


Partialpressure of methaneafteraddition of 4.00moremoles of methane=atm

Three gases, nitrogen, helium, and kryptonare confined in a 10.0 L vessel at a pressure of 5.00atm. The vessel contains 5.00 moles of nitrogen,3.00 moles of helium, and 5.00 moles ofkrypton. What is the partial pressure ofnitrogen?

Partial pressure of nitrogen = atm

Now suppose that 7.00 moles of xenon are added to thevessel without changing the volume or temperature. What is thepartial pressure of nitrogen now?

Partial pressure of nitrogen after addition of xenon= atm

Now suppose that an additional 4.00 moles of nitrogenare added to the vessel, again without any change in the volume orthe temperature. What is the partial pressure of nitrogennow?


Partial pressure of nitrogen after addition of 4.00more moles of nitrogen = atm

Three gases, hydrogen, argon, and krypton are confined in a 8.00 Lvessel at a pressure of 11.0 atm. The vessel contains 2.00 moles ofhydrogen, 3.00 moles of argon, and 4.00 moles of krypton. What isthe partial pressure of argon?

1. Partial pressure of argon = ( ? ) atm

Now suppose that 6.00 moles of xenon are added to the vesselwithout changing the volume or temperature. What is the partialpressure of argon now?

2. Partial pressure of argon after addition of xenon = ( ? )atm

Now suppose that an additional 5.00 moles of argon are added to thevessel, again without any change in the volume or the temperature.What is the partial pressure of argon now?


3. Partial pressure of argon after addition of 5.00 more moles ofargon = ( ? ) atm

a. The ammonia produced by reacting .200 mol of nitrogen and .600mol of hydrogen is measured to be 5.00 L at 27 degrees Celsius andone atm. How many moles of nitrogen were used up in thereaction?

b. Using the data in Problem a, calculate the partial pressure ofeach gas in the reaction vessel if all the gases remain in thevessel after the reaction takes place. The temperature of thevessel is 27 degrees Celsius and the pressure in the vessel is 3.0atm.

A chemical engineer must calculate the maximum safe operating temperature of a high-pressure gas reaction vessel. The vessel is a stainless-steel cylinder that measures 40.0cm wide and 48.0cm high. The maximum safe pressure inside the vessel has been measured to be 5.10MPa.

For a certain reaction the vessel may contain up to 2.73kg of dinitrogen difluoride gas. Calculate the maximum safe operating temperature the engineer should recommend for this reaction. Write your answer in degrees Celsius.

Round your answer to 3 significant digits.

1. suppose a particular consumer has 8 birr to be spent on two goods x and y. thr unit price good x=5 bir and unit price y of  3 birr

Aldosterone secretion from the adrenal cortex is stimulated bya(n)____ in the blood Na+ or a(n)____ in blood K+.

a.) increase, decrease

b.) increase, increase

c.) decrease, increase

d.) decrease, decrease

You will only receive credit if you answer all of the questions mentioned in paragraph format using a submission with a minimum of 250 words.

In your opinion are tobacco companies in any way responsible for the high number of deaths from lung cancer each year? Or is each person entirely responsible for his or her own behavior and health?

using a submission with a minimum of 250 words.

Explain how energy use affects the environment, and describe steps everyone can take to use energy more efficiently. What do you do to help the environment? What things can and will you be willing to do to help out?

How is our understanding of microbiology enhanced byknowledge of chemistry?