Friday

July 25, 2014

July 25, 2014

Total # Posts: 966

**AP Chemistry**

How do I calculate orbital hybridization?

**PHYSIC**

An airplane flies north at a speed of 150 km/h relative to the air through which it flies. If there is a tail wind of 50 km/h, what is the plane's velocity relative to the ground?

**PHYSIC**

If a blue car drives 10km/h across the deck of an ocean liner that is traveling at 90km/h, what is the blue car's speed relative to the surface of the water when it drives toward the front of the ocean liner?

**6th grade social studies**

unscramble artiotinm

**chemistry**

urgent help needed!!! what is .0966 rounded to 2 significant digits? and why?

**science**

we have done experiment in school and for homework we must write chemical reactions that have happend during the experiment. the experiment was like this : first we took an unknown substance than we have put some CuO , we mixed that two substances together in test tube. Than w...

**chemistry**

this is over significant digits. -Indicate how many significant figures are in each of the following measurements: e) 4.0 X 10-5 kg i got 1 significant digit, but i'm not sure it if it's right... (& i can't ask my teacher, the situation is complicated)

**science**

thanks a lot -.- i can use search engine too -.-"

**science**

we have done experiment in school and for homework we must write chemical reactions that have happend during the experiment. the experiment was like this : first we took an unknown substance than we have put some CuO , we mixed that two substances together in test tube. Than ...

**calculus**

What is the answer?

**science**

we have done experiment in school and for homework we must write chemical reactions that have happend during the experiment. the experiment was like this : first we took an unknown substance than we have put some CuO , we mixed that two substances together in test tube. Than w...

**english**

what were the two images paine uses in the first 10 lines of the crisis. what kinds of poeple does paine identify thes images? why are these images appropriate

**Chemistry**

Thank you so much for your help.

**Chemistry**

So the water molecules fit in between the alcohol molecules? or do they attach to the structures?

**Chemistry**

So the water molecules fit in between the alcohol molecules? or do they attach to the structures?

**Chemistry**

Water is a small molecule consisting of 3 atoms joined together. (they give the structure of H20. Alcohol is a large molecule consisting of 9 atoms joined together. (they give alcohol structure) using this information make a hypothesis that explains the decreased volumes found...

**history**

It was basically so they could check the power. No one group would have total control. The Congress can't pass laws without going through the president, and the president can't pass laws without passing it through Congress. The same goes for the Judicial branch except ...

**Chemistry**

I thought so too. I was right. :)

**Chemistry**

Assume you have a 50 L barrel full of basketballs and a 50 barrel of tennis balls. If you dump both barrels full of balls into a 100 L barrel, will the barrel be full?

**..**

ooh and why?

**..**

which variable is the dependent variable?

**10th grade math**

how do i solve for y in the equation -5y(6y - 6) - y = -4(y - 5)

**suffixes**

answer the question with a complete sentence that uses a word from the spelling list. add a sufix to the underline word to create the correct word. Does Herb resemble his brother? the word from the spelling list is "rehearsal"

**algebra**

-2 2/3 ÷3 ? 5(-2.4) multiply or divide.then compare using <,>,=

**algebra 8**

oww ...so its < cazz i'm kind of confusee about this two <>

**algebra 8**

mm is it > ??

**algebra 8**

multiply or divide. Then compare using <,>, or = 10(-1/2) ? 20÷4 can some on do it 4 me please

**science**

ohh thanks

**science**

i mean inertia

**science**

what does intertia means?

**Math**

How many seven-digit numbers less than 1,048,000 can be made using the digits 0,1,4,6,7,8, and 9? Make a list of possible ways to represent your seven-digit numbers.

**algebra 8**

A. 1165 B.920 its that the answer?

**algebra 8**

please some one

**algebra 8**

business. A restaurant manager lost $415 in business during the month of january . business picked up in February, and he ended that month with a profit of $1580 A. What was the manager's profit after January and February? B. What if...? The restaurant lost $245 in busines...

**algebra 8th**

so whats the answer?

**algebra 8th**

it da answer - 19/40???

**algebra 8th**

i gat 16/40 and 35/40 so do i have to subtract 35-16?? or what???

**algebra 8th**

mm i guess

**algebra 8th**

now i dont understand this one Add Or SSubtract 2/5 - 7/8=?? what do i have to do?

**algebra 8th**

Thanks

**algebra 8th**

-4.7-(-4.7) = 0 ???

**Spanish**

k es lo k tratas d preguntar?

**science**

the Nucleus controls the whole cell. It's known as the "brain".

**algebra check**

because it would be the same answer and the smart one that i asked said that it was right..da!!

**algebra check**

o really o woow thanks

**algebra check**

its it right or wrong???

**algebra check**

add or subtract, -8-3 -8-3= -8+(-3) 3+8= -11

**social studies**

ohh i know!!!=) ama 8th grader xd

**algebra**

its diamond problem ok

**algebra**

i dont know how to do this 1/2> on the top is??? on the right 1/2 on the butttomm?????

**Spanish**

oww ok ama stu;;;;id

**Spanish**

mm no entiendo.. k kieres decir??

**vocabulary**

mm i dont know

**vocabulary**

whats the meaning of ..The more i stretch and exercise, the more flexible my joints become....i need the context clue..please

**Chemistry**

A solid white substance A is heated strongly in the absence of air. It decomposes to form a new white substance B and a gas C. The gas has exactly the same properties as the product obtained when carbon is burned in an excess of oxygen. Based on these observations, can we dete...

**chemistry ?**

If fire is exposed to pure oxygen the reaction for fire would occur more dramatically (like a burst of flames).

**chemistry**

0.46 mol NH4NO3 * 1 mol N2O/1 mol NH4NO3 = 0.46 mol N2O 0.46 mol N2O * 43.99 g N2O/1 mol N2O = 20.24 g N2O

**algebra**

4x+4y=7 4(0)+4y=7 0+4y=7 4y=7 now divide to solve for y y=7/4 4x+4y=7 4x+4(0)=7 4x=7 now you divide for x x=7/4

**algebra**

many pounds of each should be mixed together in order to get 240-lb mixture that is 7% portein how many pounds of the cornmeal should be in the mixture? How many pounds of the soybean meal sould be in the mixture?

**Chemistry**

If your sample contained a volatitle impurity, what value would be in error, the weight of the anhydrous salt or the weight of the water? Please explain. Thank you

**Chemistry**

Write formulas for the following compounds containing complex anions. rubidium hyponitrite magnesium bromite

**Chemistry**

What is the name of the following compounds; Hg2(BrO2)2 Au(OCN)3 AuSCN Ni3(AsO4)2 Thank you

**Physics Check**

An airplane flies north at a speed of 150 km/h relative to the air through which it flies. If there is a tail wind of 50 km/h, what is the plane's velocity relative to the ground?

**Physics Check**

A motorboat travels at a speed of 40 km/h relative to the surface of the water. If it travels upstream against a current of 12 km/h what is the boats speed relative to the shore?

**algerba**

simplify the expression -10xy - 15y / 5y -10xy -3y^2 is my answer rigth or wrong

**algerba**

which is the simplest form of the radical expression sqrt (10)+6sqrt(10)+-3sqrt(10)

**Math (Algebra)**

divide the numerator by 4. Divide the denominator by 4.

**Algebra 2**

it's fine i already figured it out. thank you for your help. :)

**Algebra 2**

How do I solve this radical equation? 3 + (2x√3) = 5

**math**

slope= 2x y-intercept= -5

**Algebra 2**

What would the expression x^-6/11 be simplified?

**Chemistry**

I did your other one.

**Chemistry**

13.6 g Hg/cm^3 * 10 cm^3 The cm^3 cancels out and you get 136 g Hg. 136 g Hg * 200.59 g Hg/ 1 mol Hg = 0.68 mol Hg. 0.68 mol Hg * 6.02*10^23 atoms Hg/ 1 mol Hg= 4.08*10^23 atoms Hg

**Chemistry**

19.3 g/1 cm^3 * 1 lb/453.59 g =0.043 lb/cm^3 The grams cancel out. 0.043 lb/cm^3 * 28317.02 cm^3/ft^3=1217.63 lb/ft^3 1217.63 lb/ft^3 = 1.21 lb/ft^3

**Algebra 1**

In a 30-60-90 triangle, if they give me b=15, what would be a & c?

**Geometry**

I have a 45-45 special right triangle who's hypotenuse is 12, how do I find the other two side lengths?

**Algebra 1**

What's the answer to [(x-2)(x+2)/x(8x+3)]*[2(8x+3)/(x-2)] is it 2x+4/x or 6?

**Algebra 1**

what's the LCM of: 2r-1 , r+4

**Algebra 1**

Is this correct? (3m^2/2n )* (n^2/12) = m^2*n/8

**Algebra 1**

Is this correct? (3m^2/2n )* (n^2/12) = m^2*n/8

**chemistry**

calculate the molarity of each of the following solution: 2.00 mol glucose in 4.00 L solution.

**chemistry**

why is C4H10 the simplest alkane that can have structural isomers?

**chemistry**

Ammonia and oxygen react to form nitrogen and water. 4NH3(g)+3 O2(g)-2N2(g)+6H2O(g) a.How many grams of O2 are needed to react with 8.00 mol NH3? 8.00 mol NH3 x42.094/4 mol NH3 x32.00 O2/1 mol O2=269gO2

**chemistry**

calculate the molarity of each of the following solution: 2.00 mol glucose in 4.00 L solution.

**chemistry**

which of the following molecules can have optical isomers? a. CH2Cl2 b. H2NCH(CH3)COOH c. ClCH(OH)CH2Cl is b and c

**chemistry**

CH3-CH=CH2-CH2-CH2-CH3 CH3

**chemistry**

draw the structural formula of 2-methyl-2hexene?

**chemistry**

why does 2-butene have cis and trans isomers but 1-butene doesn't?

**chemistry**

why is C4H10 the simplest alkane that can have structural isomers?

**chemistry**

Ammonia and oxygen react to form nitrogen and water. 4NH3(g)+3 O2(g)-2N2(g)+6H2O(g) a.How many grams of O2 are needed to react with 8.00 mol NH3? 8.00 mol NH3 x42.094/4 mol NH3 x32.00 O2/1 mol O2=269gO2

**chemistry**

Ammonia and oxygen react to form nitrogen and water. 4NH3(g)+3 O2(g)-2N2(g)+6H2O(g) a.How many grams of O2 are needed to react with 8.00 mol NH3? 8.00 mol NH3 x42.094/4 mol NH3 x32.00 O2/1 mol O2=269gO2

**chemistry**

carbon disulfide and carbon monoxide are produced when carbon is heated with sulfur dioxide. 5C(s)+2SO2(g)-CS2(I)+4CO(g) a. how many moles of C are needed to react with o.500 mol SO2? 0.500mol SO2 x5C/2SO2=1.25C

**chemistry**

would you tell me please are the answers corect?

**chemistry**

determine the correct answers to the calculation shown below to the correct number of significant figures? a. (32.453)(34.23+1.17)/(2.26-1.811)(0.00378)=9.671716784=9.7 b. (3.23+0.0018)=3.2318=3.2 c. (82.97-0.012)/(1.100)(21.9)=1651.618364

**chemistry**

determine the correct answers to the calculation shown below to the correct number of significant figures? a. (32.453)(34.23+1.17)/(2.26-1.811)(0.00378)=9.671716784=9.7 b. (3.23+0.0018)=3.2318=3.2 c. (82.97-0.012)/(1.100)(21.9)=1651.618364

**chemistry**

what is the explanation of 0.01M acetic acid ?

**chemistry**

what is the explanation of the pure acetic acid?

**chemistry**

if one can find the ratio of the number of moles of the elements in a compound to one another, one can find the formula of the compound. in certain compound of copper and oxygen, Cux Oy, we find that a sample weighing 0.5424g contains 0.4831g Cu. a. How many moles of Cu are in...

**chemistry**

how much 0.150 M sodium hydroxide would be required to just neutralize 15 ml of 0.175 M hydrochloric acid?

**chemistry**

If all the students placed their "unused" standard sodium hydroxide back into the original container what would be the likely effect on the next class?

Pages: <<Prev | 1 | 2 | 3 | 4 | **5** | 6 | 7 | 8 | 9 | 10 | Next>>