# Posts by Allison

Total # Posts: 533

**Chemistry**

how many mL of .122 M MnO4- are required to react with an excess of C2O42- in order to produce 75.25mL of carbon dioxide gas measured at 30 degree C and 715 torr?

**Chemistry**

The latent heat of vaporization of ethanol is 200 calories/gram. This means that _____.

**algebra**

You can buy 1 child's ticket, 1 adult's ticket and 1 senior citizen's ticket for a minor league baseball game for $29. Tickets for adults cost 3 times as much as tickets for children. A family of 3 children, 2 adults, and 2 senior citizens pays a total of $63 for ...

**physics**

The human body loses heat at a rate of 120W when sitting quietly at rest. If a 65 kg student takes 100 hours to read War and Peace by Leo Tolstoy, how high could they have been lifted if all the heat energy lost was utilised to lift them against gravity (assuming that the ...

**Chemistry - Van't Hoff Factor**

How do I determine the van't hoff factor for a strong unknown electrolyte? I have the freezing point depression, (0.46 C) and there 18 ml of the unknown solution. I know the formula is T=iKfm, but I don't know how to apply it when I don't know m.

**Biochem**

22.82

**Biochem**

Consider the malate dehydrogenase reaction from the citric acid cycle. Given the following concentrations, calculate the free energy change for this reaction at 37.0 °C (310 K). ?G°\' for the reaction is 29.7 kJ/mol. Assume that the reaction occurs at pH 7. [malate...

**Social Studies (Check my answers please!)**

Those are correct, good job

**Politics **

Are drones an effective use of counter-terror techniques or a mechanism of state terrorism?

**Government **

What criteria should civil societies have? What are some ways that we can measure the strengths of civil societies? Thank you for your help!

**Chemistry **

What are at least 2' real world uses of colligative properties?

**CHEMISTRY**

1. Not sure of how to do the calculations... Make a 0.200 m solution of NaCl in a 100. mL volumetric flask. ... Solution A's question or statement is the same but with M (molarity) Is this right? The small m means molality. If it were changed to capital M, then solution A...

**History**

What diseases were originated or were most common in the 12th century?

**Math, Precalc**

A fishing boat leaves port at 4 miles per hour at a bearing of 80? for 3 hours, then turns to a bearing of 0? at 3 miles per hour for 4 hours, and finally changes to a bearing of 200? at 6 miles per hour for 5 hours. At this point, the boat heads directly back to port at a ...

**Math, Precalc**

Find, to the nearest tenth of a degree, the angle formed by the two main diagonals of a cube that connect consecutive vertices of the lower base to the opposite consecutive vertices of the upper base, as illustrated at right.

**Physics**

A plane leaves Seattle, flies 77.0 mi at 21.0 ∘ north of east, and then changes direction to 52.0 ∘ south of east. After flying at 124 mi in this new direction, the pilot must make an emergency landing on a field. The Seattle airport facility dispatches a rescue ...

**World History**

The Arabs carried an expensive trade both by (blank) and by camel (blank)

**Math**

15.5

**math**

Name the sets of numbers to which the given number belongs 60/47

**Math**

4227992.1

**Please help me with this math**

3k is less than 9 solve for k i have been working on this for two hours!!!!

**algebra II**

Joe has 120 coins consisting of dimes and quarters with a value of $19.05. how many dimes and quarters does Joe have?

**Math**

0.09

**geometry**

2004-06-01-04-00_files/i0320000.jpg Find the volume of the cone. Round your answer to the nearest hundredth.

**Maths**

Julie is j years old. Her father is four times as old as Julie and her mother is seven years younger than her father. How old is each person?

**math**

lim f(x) xcubed - 8/ xsquared -5x+8 x --2

**Computer Science**

Create a Raptor Flowchart that calculates the amount a person would earn over a period of time if his or her salary were five cents the first day, ten cents the second day, and so on doubling each day. Your program should: 1. Request the number of days. 2. Display a table ...

**Math**

the ratio of father's age to his son age is 8:3. in 5 year's time the sum of their ages will be 54. how old are they

**college math**

a basketball team played 68 games they won 22 more than they lost. how many games did they win? how many games did they lose?

**Chemistry**

How do you determine the number of valence electrons in one atom of each of the following elements. ... We had 20 elements overall for homework so I listed the first 5 A) Na B.) F C.) Rb D.) Ba E.) I

**health**

never mind. the correct answer is A

**health**

Every ________, nerve impulses stimulate the breathing process, or ventilation, which moves air through a series of passages into and out of the lungs. A. 5 to 7 seconds B. 3 to 5 seconds C. 1 to 3 seconds D. 7 to 9 seconds I think its B

**Chemistry**

a 6.0 mole sample of Ca3(PO4)2 and a 12.0 mole sample of SiO2 react in an evacuated vessel. after one of the reactants is fully consumed, how much of the gas is created? How exactly would you solve this problem? Would you have to find the molar mass of both sides and divide by...

**Geometry**

I have AB=Bc Theorem of Midpoint CD=DE Theorem of midpoint BC=CD Definition of Congruency AB=CD Def. Of Con AB+BC=AD Seg. addition post. CD+DE=CE Seg. Addition Postu. ABC+CDE=AE Seg, Addition postulate Cis midpoint of AE midpoint Theorem. My teacher wants 17 steps!

**Geometry**

Given: B is the midpoint of line AC. D is the midpoint of line CE. Ab=De Prove AE=4AB

**Reading**

Need to finish reading a book but I am on pg 76 and thar is 178

**math**

3. The café serves chocolate, vanilla, and strawberry ice cream. You may also get in on a cone, in a bowl or in a cup. They have sprinkles and caramel as toppings too. How many different combinations of ice cream, servings and toppings can be made?

**health**

Ms. Sue can you please try to help answer the question instead of pasting useless links?!?!?!? I would appreciate

**Finance**

a share of preferred stock of MXT LTD. is expected to pay 1.0 per quarter into indefinite future. the current required annual expected rate of return, k, is 8%. suppose that an investor buys 10 shares today and wants to hold these shares for the next 2 years. find his/her cash...

**Chemistry**

Find the Density of xenon of STP

**Chemistry**

Find temperature of 20.0g of nitrogen that occupies volume of 500.0ml at pressure 0.45 bar.

**chemistry**

Find volume of carbon dioxide occupied by 1.0g of CO2 at 0 degrees Celsius and pressure 25.0 torr.

**Chemistry**

Find pressure exerted by 2.0g of helium enclosed in a 100.0 ml container at 25 degrees Celsius

**Chemistry**

you would be surprise what he actually leaves out.

**Chemistry**

Explain Why some ionic compounds are soluble in water. Explain why non-ionic compounds, such as ethanol or sugar are soluble in water. Explain what a saturated solution.

**Chemistry**

How to prepare 250ml of 0.2 M hydrochloric acid from 2.5 M hydrochloric acid.

**chemistry**

Find volume (in ml) of 0.3 M solution of sodium chloride containing exactly 3.0g of sodium chloride.

**Chemistry**

how to prepare 100.0 ml of 0.2 M solution of sodium hydroxide

**Chemistry**

A solution contains one or more of the following ions: silver, barium, and Copper (II). CY 105 student adds sodium chloride to a small sample of the solution of the unknown and a white precipitate is formed. He/she filters out the precipitate and then add sodium carbonate to ...

**chemisty**

find the oxidation state of a carbon in methane, carbon monoxide, carbon dioxide, CH2O, acetic acid, carbonic acid, methanol, and benzene (C6H6)

**chemistry**

I really need help working them out they all look different to me

**chemistry**

find the volume of 0.1 M hydrochloric acid required to react with 22.0ml of 0.07 M barium hydroxide

**chemistry**

find volume of 0.2 M sulfuric acid required to react with 15.0 ml of 0.25 M sodium hydroxide

**chemistry**

your not getting the picture I need help to study for an exam because I do not get this.

**chemistry**

find mass of magnesium nitride produced in reaction of 5.0of magnesium with 10.0gof nitrogen. the reaction was carried out in a closed container

**chemistry**

Find composition of post-reaction mixture if 10.0 g of sulfur and 20.0 g of iron were reacted in a closed container producing iron (II) sulfide.

**chemistry**

that is exactly how it is worded on the pretest we have to study by

**chemistry**

find composition of post-reaction mixture if 10.0g of sulfur and 20.0g of iron were reacted in a closed container producing iron (II) sulfide

**chemistry**

to be honest I don't understand any of it I have a foreign chemistry teacher and I am not getting any of it.

**chemistry**

find mass of sulfuric acid obtained in reaction of 20.0g if sulfur trioxide with excess of water

**chemistry**

find mass of calcium carbonate obtaqined in reaction of 10.0g of calcium oxide with an excess of carbon dioxide

**Chemistry**

Find the molarity of a sodium hydroxide solution obtained by dissolving 125.0 mg of sodium hydroxide in 50.ml volumetric flask.

**Astronomy**

The Hubble Space Telescope orbits at an altitude of 600 km above the Earth's surface. Assuming it is in a stable circular orbit, what is its velocity? For reference, the Earth's radius is 6400 km and Earth's mass is 6 x 10^24 kg. The formula to solve for circular ...

**Math**

Hello! Can you check my answers for these 4 worksheet questions? Thank you in advance (: 1. The following ordered pairs give the scores on two consecutive 15-point quizzes for a class of 18 students. (7, 13), (9, 7), (14, 14), (15, 15), (10, 15), (9, 7), (14, 11), (14, 15), (8...

**Math / Algebra**

Can you check my work? Thank you :) 1. The Domain of a function F is the same as the range of F^-1 (True or False?) Answer: True. 2. Does the function y = |x-2| have an inverse? Select the best answer. A. Yes, it passes the horizontal line test. B. No, it does not pass the ...

**physics**

An object has the following equation of motion (equation describing its position as a function of time). x(t) = x0 where x0 = −2.3 m. What is the object’s position at time t = 23 s? What is its velocity?

**Biology**

A point mutation is a a mutation affecting only one or very few nucleotides in a gene sequence. So out of those four choices, it would be where only one is affected. The first choice, (A-A-A-T-G-C) Is correct.

**Physics**

Station Math Two station astronauts will each perform two 8-hour EVAs within 13 days to repair a damaged solar panel that was impacted by a micrometeoroid on the space station. What is the total amount of oxygen needed by the two astronauts to accomplish this? Please put your ...

**chemistry**

write the mass number, atomic number,number of protons, neutrons,and electrons for He, Si, K+, N3-

**chemistry**

an ice cube has a mass of 4.3g and a mass of 5.0mL it is placed in a 30mL of oil that has a mass of 27 g will the ice cube float or sink in the oil

**Social Studies**

Quebec act

**Chemistry**

Complete the Bronsted- Lowry reaction, placing each product by its appropriate label. HCO3^-+HNO2 (double arrows) need a spot for acid and for base.

**algebra**

It grew 7.66 inches repeating every week.

**physical science**

780 J/s

**Multiplication**

Jenna says that no row or columm contains products with only odd numbers.do you agree ?explain

**math**

Jenna says that no row or columm contains products with only odd numbers.do you agree ?explain

**math**

20+10+9+7=46 There are 20 students in 9th Grade. 20/46=0.43478261 The percentage of students in the ninth grade riding the bus are 43%.

**maths**

by how much does the 3 in 34685 exceed the 3 in 23487

**Math Help!**

Those are the answers in my book. & Sorry! How about now? 1. C 2. A 3. D

**Math Help!**

1. D 2. B 3. C

**Math Help!**

1. Find the product. (2x)(10x) 20x 12x 20x^2 5x 2. -3m(m + 8) -3m^2 + 24 -3m^2 + 24m -24m^2 -4m + 5 3. 4d(2d - 9) 8d - 36d -d -28d^2 8d^2 - 36d

**Math 2**

So is the answer 1/12yard, if she has 1/4 yard of fabric, and cuts it into 3 equal pieces?

**Math 2**

Is the answer 1/12. 1/4 multiplied by 1/3 is how I got that. Is that correct?

**Math 2**

Ammeter has 1/4 of fabric. She cuts it into 3 equal pieces. What fraction of a yard is each piece of fabric?

**Math 2**

John solved 1/5 divided by 10 by using a related multiplication expression. Which multiplication expression did she solve? Choices are A. 5 *10 B. 1/5 *10. C. 5* 1/10 d. 1/5 *1/10

**Statistics**

A simple random sample of 27 adult mice has a length standard deviation of 0.66 mm. Using a 0.10 level of significance, does it appear that these mice come from a population with a length standard deviation of 0.87 mm?

**Statistics**

A simple random sample of 27 adult mice has a length standard deviation of 0.66 mm. Using a 0.10 level of significance, does it appear that these mice come from a population with a length standard deviation of 0.87 mm?

**Statistics**

18.3

**Statistics**

18.3% smoke

**Statistics**

What part? That's exactly how it's written on the homework

**Statistics**

One survey by the American Medical Association showed that among 785 randomly selected people who completed four years of college, 81.7% do not smoke. Use a 0.01 significance level to test the claim that people who completed four years of college are more likely to not smoke ...

**math**

How do you find the sum of the mode from each set of data? Set A: ( 4,9,7,2,4 ) Set B: ( 11,6,4,6,2 ) Set C: ( -3,2,9,-3,-3)

**Chemistry**

What mass of octane must be burned in order to liberate 5410 kJ of heat?

**Math Help? Check my answers.**

1. A spinner is divided into 10 equal sections numbered from 0 to 10. You spin the spinner once. What is P(divisible by 3)? 1/3 1/2 2/5 3/10** 2. A bag contains 7 green marbles, 9 red marbles, 10 orange marbles, 5 brown marbles, and 10 blue marbles. You choose a marble, ...

**health**

In the United States, the most at risk and highest reported rates of infection of gonorrhea are among sexually active ________. "All of the above" isn't a choice it should be "A and B" correct answer is D. "A and B"

**Physics**

The figure(Figure 1) shows a solid metal sphere at the center of a hollow metal sphere. Assume that E=1.2×104N/C. What is the total charge on the exterior of the inner sphere?

**History**

Tea increased trade with Europe and became a favorite drink of many Europeans. Hope this helps!

**Physics**

An electric dipole is formed from two charges, ±q, spaced 1.00cm apart. The dipole is at the origin, oriented along the y-axis. The electric field strength at the point (x,y)=(0cm,10cm) is 320N/C . What is the charge q? Give your answer in nC. What is the electric field...

**math**

A rectangular fish pond is 21ft(squared) in area. If the owner can surround the pond with a 20 foot fence, what are the dimensions of the pond?

**AP Chemistry**

A solution is made by mixing exactly 500 mL of 0.167 M NaOH with exactly 500 mL of 0.100 M CH3COOH. Calculate the equilibrium concentrations of H+, CH3COOH, CH3COO-, OH-, and Na+.