# Posts by Jack

Total # Posts: 1,773

**Chemistry**

Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas. Is Al2(CO3)3 ==> Al2O3 + CO2 the right equation? If so, how do you balance this equation?

**Chemistry**

Balance the following equations. A) SO2 + O2 --> SO3 B)Fe2O3 + H2 --> Fe +H2O C)P + O2 -->P4O10 D)Al + N2 --> AlN

**Chemistry**

Write and balance equations for the following reactions. A)Iron metal and Chlorine gas react to form solid iron(III) chloride. B)Solid aluminum carbonate decomposes to form solid aluminum oxide and carbon dioxide gas. C)Solid magnesium reacts with aqueous silver nitrate to ...

**chemistry**

Write Skeleton equations for these reactions. A) Heating Copper(II) sulfide in the Presence of diatomic oxygen produces pure copper and sulfur dioxide gas. B)When heated, baking soda (Sodium hydrogen carbonate) decomposes to form the products sodium carbonate, carbon dioxide, ...

**bcc**

if you put honey,water,dishwashing liquid and vegetable oil in a clear jar and then you add asmall of plastic cup, plastic fork, straw and a small piece of styrofoam cup.

**bcc**

how do you work equation dealing friction and newtons when pulling the distance of a block

**Music**

tell me about the rocks band

**Chemistry**

which has the highest lattice energy BaO or SrO

**chemistry**

Compound A contains 1.75g nitrogen and 3.99g oxygen. Compound B contains 19.6g nitrogen and 56.0g oxygen. Are compounds A and B the same? Explain.

**chemistry**

Find the molar mass of Chromium (III) Hydrogen Phosphate. Also, what is the chemical formula for this molecule?

**chemistry**

The mass of twenty-three dozen pencils is 1.496 kg. What is the mass of 1 pencil?

**chemistry**

How many neon atoms are there in five moles?

**chemistry**

How many carbon atoms are there in 150.0 g Glucose? (Glucose is C6H12O6, molar mass = 180.16 g/mol)

**chemistry**

Convert 12 fluid ounces liters. (1 fl. oz = 29.57 cm^3)

**chemistry**

Which of the following are empirical formulas? A) Ribose (C5H10O5) B) Ethyl Butyrate (C6H12O2) C) Chlorophyll (C55H72MgN4O5) D) DEET (C12H17ON) (numbers are subscripts)

**ecology**

examples of how humans have increased their food supply and what effects these methods have on the environment overall.

**chemistry**

How many grams of oxygen are there in 100.0 grams of water? What percentage of the mass of water is oxygen?

**chemistry**

Find the number of K atoms, C atoms, and O atoms in 95.5g of K2Cr2O7. (Potassium 2, Chromium 2, Oxygen 7).

**English**

they seem good to me

**chemistry**

consider the reaction in which 410 grams of Ca(NO3)2 react with just the right amount of lithium metal in a single replacement reaction. 1-how many grams of lithium are required? 2- how many grams of each product can be produced?

**math**

i have 78% in the course the exam is worth 30% and i got 65% what is my overall mark in the course

**math**

i have 78% in the course the exam is worth 30% and i got 65% what is my overall mark in the course

**math**

a trianglar course for a sailing race is marked off by buoys. The first lef is 250 meters longer than the second and the third leg is 100 meters shorter then the first. if the length of the course is 2500 meters, find the length of each length

**math**

the first side of a triangle is 8 meters longer than the second side. the third side is 3 times the second side. the perimeter is 128 meters. find the lengths of the three sides.

**chemistry**

The vapor pressure of dichloromethane, CH_2Cl_2, at 0 degrees celcius is 134 mmHg. The normal boiling point of dichloromethane is 40 degrees celcius. Calculate its molar heat of vaporization (in kJ/mol).

**History**

sue's answer doesnt help at all. thanks alot i failed

**History**

All of the following account for nativist sentiment against the New immigrants of the late 19th century EXCEPT that the immigrants a. practiced different religions b. had different languages and cultures c. were willing to work for lower wages than were native born workers d. ...

**science**

I added 40 mL of NaOH 1N to rise the pH of 10g teriphitalic acid from 5.3 to 6.3, so if I adde the same 40 mL of NaOH to 12g of the same acid what is the new pH will I have?

**science**

why does magnesium dissolve quicker in strong acid

**Physics**

Oop's, my bust. It's 60 Joules. I believe the 50m was thrown is a curve to throw me off, as as the '60J' = W. Otherwise it would have been say '60N over 50m = 3000J'. Thanks guys.

**Physics**

A car with a mass of 100 kg, with initial v = 1 m/s, has 60 Joules of energy added for 50 m. What is the final velocty? I'm using KE = 1/2 mv^2 to find initial KE. Then add 600 J to this for the final KE. Thus, W = KFf - KEi; KEf = W + KEi and KEf = 1/2mv^2 v^2 = (2(KEf))/m

**9th grade**

an egyptian form of writing

**Math**

How do you divide whole numbers?

**Math**

how do i compute a problem like 4/7 * 2/3 * 6

**Algebra**

15=2(9+4)+3

**math**

DQ sells 6 times as many orders of french fries as sonic everyday. If both sold 60 more orders DQ would only sell 3 times as many fries. How many do each sell before and after the incease?

**Pre-Cal**

Find the exact value of sec 60°tan135°-cot60°sin60°

**math**

The sweater shop projected income this year will be 69,000. That amount represents 40% of the shops annual sales. What is the shops projected sales

**math**

If I gross 2645.00 and taxed 31% how much do I bring home?

**math**

a wagon retails for 49.97 the store receives a built in 40% profit margin what is the cost

**math**

I can buy office supplies @ walmart with a 30/10 chain discount. If I paid $47.25 for adding machine. What was the regular price of my purchase? 30/10 chain discount means .70 x .90

**math**

I can buy office supplies @ walmart with a 30/10 chain discount. If I paid $47.25 for adding machine. What was the regular price of my purchase?

**solve for unknown**

thank you

**solve for unknown**

If jack does home improvment and price the material ,add 1 and 1/2 times that amount for labor and then quotes the job. If he gets the job for 17,000 how much is the material? and labor ?

**math**

wagons retail for $49.97. stores receive the wagons with a 40% profit margin. what is the cost?

**French**

What does conduissez mean in french?

**math**

Mr. Havel bought a car for $2400 and sold it for $2700. what was the percent of profit for Mr. Havel in selling the car?

**health**

for the health i get very good but my head alwas hrt so how do i do i don't know tell me why

**physics**

31^2+67^2=5186 sqrt(5186)=72.01388 ANSWER =72.01388

**science**

How does the portuguese man of war contribute to science?

**religious education**

please could someone help me answer this question - can science prove that God does exist? thankyou

**Math**

Thanks!

**Math**

I need help with an inverse function. If f(x)=3-x, I find the inverse function to be: x=3-y which is the same as y=3-x, same as the original. How can this be?

**physics**

A worker exerts a 140 N horizontal force on a 41 kg crate. The crate's acceleration across a level floor is 0.90 m/s2. Find the frictional force that the floor exerts on the crate.

**physics**

Suppose David Ortiz hits a home run which travels 361. feet (110. m). Assuming it left the bat at 50.°, how fast was it hit?

**psychology**

1)When conditioning takes place, behavior is associated with? a. ideas b. stimuli, consequences, or both c. events in the environment d. both b and c are answers. my first answer was b but this was wrong. Is the correct answer d? 2) In classical conditioning, the main ...

**Psychology**

1) The type of learning that involves reasoning, problem solving, language, memory, association of ideas, and other mental processes is Cognitive learning. Is this correct? 2) When you are figuring out how to memorize information for your college tests, you are engaging in ...

**physics**

answer.a car of mass 2000kg,increases its velocity from 10to 40 m\sec in time interval of 2 sec. calclate the force?

**science**

what are the chemical properties of scandium

**writing**

I'm writing an essay about a book I read, and I need to make a personal connection with a character that is conceited, brave, and strong. Could someone give some examples of personal connections?

**cathedral**

How do you figure out the space and volume ratio cube

**Physics**

if an obejct has an horizontal acceleration of -0.51 m/s squared and vertical acceleration of -7.683 m/s squared, what is the resultant acceleration?

**Accounting**

Do you help with accounting homework?

**Physics**

An object traveling at 5.0 m/s East has a mass of 6.0 kg. What is the magnitude of the object's momentum? I am not sure what the formula is for this one!

**science**

Do you think it would have been possible to know that living things are made up of cells without microscopes? Explain your thinking.

**Gen 105**

How can you use study techniques recommended for your personality type and strongest intelligence(s)to function best in distance learning enviroment

**Economics**

Is the Board of Governors influenced by Political Consideration?

**Math**

(4 x 1/2 + .87 + 17/16 + 22a -7.64 x 0.19 x 0 -1.87 + 3.1416) / 13

**math**

(6/7 x 4p + 3/4 - 8/19) (5p - 9x .88 x 0 /4) x 10%

**math**

(4 x 1/2 + .87 + 17/16 = 22a -7.64 x 0.19 x 0 -1.87 + 3.1416) / 13

**Algebra**

how to rewrite the expression using the inverse operation?

**english**

what are a list of Adverbs

**algebra**

Moon - 240000 mi Jupiter - 391000000. The space vehicle would take how many days to reach Jupiter? Saturday,

**Math**

Select the set of equations that represents the following situation: The sum of two numbers is 38, and their difference is twenty-six more than the smaller number. What are the two numbers?

**algebra**

How do you set this up as an equation? There is a total of 1600 cups and bowls. cups cost 1.90 and bowls cost 2.85. how many of each do you have if the bill was 3430.00. and that includes 105.00 saucer.

**Math**

I have $100.00 dollars to spend to buy 100 animals. Cows cost $50.00 each, sheep cost $3.00 each, pigs cost $2.00 each and chicks cost $0.10 each. How many of each do I need to buy to spend $100.00 dollars and have 100 aninals?

**statistics**

you are constructing a 95% confidence interval using the information: n = 50, xbar = 54.3, s = 2.1 and E = 0.65. What is the value of the middle of the interval?

**Environmental Science**

Stop looking to outside sources to do your school work you retard...figure it out for yourself

**penn foster**

explain how evalution and management e/m codes are grouped

**Literature**

The book Dracula can be substituted for which book read by the creature in the novel Frankenstein? Paradise Lost Ruins of Empires Plutarch's Lives Sorrows of Werter I think maybe Ruins of Empires but I am really not sure. The assignment is to substitute the reading ...

**Marine science**

Why is it beneficial that many predatory fish have larval and juvenile stages that feed at a low trophic level, while the adults feed at a tertiary or quaternary trophic level? My answer was that the larval and juvenile stages would get more energy but my teacher said that ...

**Literature**

I also need to find four different works that could be used to substitute the four that the creature read in the novel Franenstein which would change the creature. Does anybody know any websites that I could use to help me because I have no idea books to pick?

**Literature**

I need to know the four works that the creature in the novel Frankenstein read! Paradise Lost, Plutarch's Lives and Sorrows of Werter. I cannot remember what the last one is!!

**Marine science**

How has the Galapagos Tortoise changed or adapted over time?

**marine science**

How long has the Galapagos Tortoise been in existence?

**Math**

use the given zero to find all the zeros of the function. f(x) = x^3 + x^2 + 9x + 9 r = 3i I do not understand this!!

**Math**

Solve: (3-2) - (2-3)

**Math**

Find all the zeros of the function and write the polynomial as a product of linear factors. g(x)=x^5 - 8x^4 + 28x^3 - 56x^2 + 64x - 32 The zero I found so far is 2. I am confused on how to find the rest.

**Math**

Find a polynomial function with integer coefficients that has the given zeros. 0,0,4,1+i Please explain!! I am very confused.

**english**

A B C D

**english**

I just need help on this passage... To be a King, and wear a Crown, is a thing more glorious to them that see it, than it is pleasant to them that bear it: for my self, I never was so much enticed with the glorious name of a King, or the royal authority of a Queen, as ...

**math**

Find all the zeros of the function. f(x) = x^3 + 11x^2 + 39x + 29 I found one of the zeros = -1 but I am confused on how to find the other two.

**math**

Find all the zeros of the function. t^3 - 3t^2 - 15t + 125 Please explain. I am very confused on how to do this!!

**Physics**

I had to graph the following data and find the slope: Normal Force: Frictional Force: 0 0 2.0 0.6 6.0 1.8 9.0 2.7 10.0 3.0 The slope was 0.30. The question that I am confused on is what does this graph's slope represent?

**math**

Perform the operation and write the result in standard form. 1 + i over i - 3 over 4 - i Do I have to multiply top and bottom by i?

**math**

Perform the operation and write the result in standard form. 8 + 20i over 2i Please explain, I am very confused!!

**Science**

Crustaceans grow by doing what?

**English**

"Disguise" is stressed on the second syllable, not the first. (Don't know if this helps.)

**physics**

(Let me try to post that better, this site blocks URLs. "tinyurl" "." "com" "/oexysh")

**physics**

tinyurl (com) /oexysh (Do the same for the other terms.)