Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 65

**Chemistry, please help!!!**

I have to go to work this weekend so I'm trying to get my homework finished. Could you please help me figure out this question? Calculate the mass of 1.00 mol of each of these substances: a.) silicon dioxide (SiO2) b.) diatomic nitrogen (N2) c.) iron (|||) hydroxide (Fe(OH...

**Chemistry**

Calculate the mass of 1.00 mol of each of these substances: a.) silicon dioxide (SiO2) b.) diatomic nitrogen (N2) c.) iron (|||) hydroxide (Fe(OH)3) d.) copper (Cu)

**Chemistry**

Same with these: How do you do them? 1.)What is the mass at 20 degrees Celsius of 5 liters of air? 2.)What is the volume in liters of a kilogram of ice at 0 degrees Celsius? 3.)What is the mass of a bar of aluminum measuring 1.0cm by 1.0cm by 10.0cm?

**math**

What is the rest of the question?

**Chemistry**

Damon, that's not the math we are using. That is more advanced. Currently, we are using the equations between density, mass, and volume.

**Chemistry**

Ice density: 0.9167 g/cm3 at 0 °C Aluminum density: 2.7 g/mL

**Chemistry**

Same with these: How do you do them? 1.)What is the mass at 20 degrees Celsius of 5 liters of air? 2.)What is the volume in liters of a kilogram of ice at 0 degrees Celsius? 3.)What is the mass of a bar of aluminum measuring 1.0cm by 1.0cm by 10.0cm?

**Chemistry**

I did have a lot of those questions and I used the method you did. Thanks for the help!!!!!

**Chemistry**

Oh! Ok, thank you! I get it know.

**Chemistry**

could you go through the steps in a different way maybe? I still don't get it.

**Chemistry**

The speed limit on a certain highway is 72km/h. What is the speed in cm/s? Could you go through each step on how to get the answer? Lots of the questions are like this one, but I don't know how to do them.

**Chemistry**

Light travels at a speed of 3.00 times 10^10 cm/s. What is the speed of light in kilometers/hour?

**Chemistry**

An atom of gold has a mass of 3.271 times 10^-22g. How many atoms of gold are in 5.00g of gold?

**Chemistry**

What conversion factor would you use to convert cubic decimeters to milliliters?

**Algebra**

Graph y<-x+2

**Algebra**

Describe the transformation of y=5(x-1)^2 from the parent function (y=x^2)

**Algebra**

x^2*x^2/x^4= ?

**Chemistry**

Thank you for your help!

**Chemistry**

Methane gas (carbon tetrahydride) reacts with oxygen by combustion: CH4 + 2O2 -> CO2 + 2H2O a.)How many moles of methane are needed to produce 3.5*10-4 moles of carbon dioxide? b.)How many moles of oxygen are needed to react form the 3.5*10-4 moles of carbon dioxide? c.)How...

**Chemistry**

Aluminum bromide and sodium hydroxide react to form aluminum hydroxide and sodium bromide. a.)How many moles of sodium bromide can be formed from 1.55 moles of aluminum bromide? b.)How many moles of aluminum hydroxide may be formed from 4.65 moles of sodium hydroxide?

**Chemistry**

Aluminum metal and hydrogen chloride react to form aluminum chloride and hydrogen gas. a.)How many moles of aluminum metal are needed to produce 3.33 moles of aluminum chloride? b.)How many moles of hydrogen chloride are needed to react with this number of moles of aluminum me...

**Pre-Algebra**

10^7 is really 10000000, or 1 followed by 7 zeros. 10 million * 2.5 is 2.5 * 10 which is 25 million. 25,000,000

**Timeline**

Thanks. :D

**Timeline**

I'm making a timeline for the scientist that help contribute to the Heliocentric Theory from Aristotle to Halley.

**Timeline**

Is there a website that makes timelines for you and puts the right increments between these dates : 322 B. C. to 1742?

**Math**

Mark's time is 10 laps in 20 minutes. 20 minutes * 3 = 1 hour. 10 laps * 3 = 30 laps. Mark has the speed of 150 miles per hour. In an hour he ran 30 laps/150 miles. This means that each lap was 5 miles. Tom ran 5 laps. 5 laps * 5 miles is 25 miles in 15 minutes. 15 * 4 = 1...

**The Titanic**

I'm researching on the Titanic and when the crew members saw that the ship was going to sink, who did they let get on the lifeboats?

**maths**

It's A x = 0. Google up "graph x = 0" and see if it crosses those points.

**Quotes**

I'm doing this essay, and I would really like a few names on women who have gone to war and a couple of their quotes. Thanks

**maths**

A for the 1st one, 45 dollars per hour, x, is 45x. The fixed-service is a one-time thing so it's c = 45x + 65.The 2nd one is D. The original cost of the copier is 5,500. 5500-2500 = 3000. This is the cost reduction over the ten years. 3000/10 is 300: The amount it gets red...

**math**

The slope is -1/6. The y-intercept is 5. To graph you start at (0, 5) and you go up once and over to the left 6 times. rise/run

**Live Tutors**

Thank You!!!!!!!!

**Live Tutors**

Is there a website that has live tutors for free? Not like tutor. com when you have to sign up with a credit card for a trial.

**physics**

If only conservative forces are acting, total mechanical energy (KE + PE) is not necessarily conserved. True or False?

**physics**

Friction leads to a loss (or dissipation) of mechanical energy. True or False?

**physics **

For non-conservative forces, the work done does depend upon the path taken. True or False?

**physics**

The work done by non-conservative forces is equal to the total change in kinetic and potential energy. True or False?

**Physics**

A popular amusement park ride looks like a huge cylinder of radius 3 m, where people stand up along the vertical walls on top of a floor which can drop away. The cylinder begins to rotate faster and faster, and when it reaches its highest speed the floor drops away. Clearly st...

**Math**

What is the Greatest Common Divisor of 19 and 18?

**Physics Superpostion Principle**

four charged particles are placed so that each particle is at the corner of a square. the sides of the square are 15 cm. the charge at the upper left corner is +3.0 microcoulombs, the charge at the upper right corner is -6.0 microcoulombs, the charge at teh lower left corner i...

**Physics**

The Superpostion Principle: Three point charges q1, q2 and q3 like along the x-axis at x=0, x=3.0cm and x=5.0cm, respectively. calculate the magnitude and direction of the electric force on each of the three point charges when q1 = +6.0 microcoulombs q2= +1.5 microcoulombs and...

**Physics**

A balloon rubbed against denim gains a charge of -8.0 uC. What is the electric force between the balloon and the denim when the two are separted by a distance of 5.0 cm? (Assume that the charges are located at a point!)

**Physics**

A balloon rubbed against denim gains a charge of -8.0 uC. What is the electric force between the balloon and the denim when the two are separted by a distance of 5.0 cm? (Assume that the charges are located at a point!)

**ENGLISH**

Unscramble the letters: N A N Qu I I R A B I N S O U I O TO MAKE THE BIGGEST WORD

**Animal Skeletal and Muscular Systems**

Which of the following is an example of voluntary muscle activity? a. scratching b. movement of food down the intestine c. heart contractions d. movement of urine into the bladder Which of the following muscles are used when breathing? a. intercostal and pectoral b. intercosta...

**physics**

A ball is thrown vertically upward with a speed of 26.8 m/s from a height of 1.9 m. How long does the ball take to hit the ground after it reaches its highest point?

**Animal Skeletal and Muscular Systems**

1.) The development of an animal follows which of the following growth sequences? a. cells, organs, tissues, organ systems b. cells, tissues, organs, organ systems c. cells, organ systems, tissues, organs, d. tissues, cells, organs, organ systems 2.) During an operation, a vet...

**pre algebra**

which inequalty statment is true? a. 8 < ã78 <9 b. 38< ã78 <40 c. 77 < ã78 <79 d. 6.083 < ã78 <6.085

**books**

I need some information on DeeDee from "Early Candlelight" by Maud Hart Lovelace. It was a hard read for me. Also, a summary of some of the main events would be great! Thanks.

**physics**

A load of 46 N attached to a spring that is hanging vertically stretches the spring 0.23 m. What is the spring constant? Answer in units of N/m.

**physics**

A load of 46 N attached to a spring that is hanging vertically stretches the spring 0.23 m. What is the spring constant? Answer in units of N/m.

**physics**

A mass of 0.52 kg attached to a vertical spring stretches the spring 39 cm from its original equilibrium position. The acceleration of gravity is 9.81 m/s2 . What is the spring constant?

**math **

Ren this is substitution method and I am so confused

**math**

8x+5y=184, x-y=3

**writing. language arts**

thanks guys that really helped both of them. Kelsi <3

**writing. language arts**

hello, well i need some help. how would you make a sentence using the word immense? Thanks, Kelsi <3

**physics**

A glider on an air track is connected by springs to either end of the track. Both springs have the same spring constant,k , and the glider has mass M. A)Determine the frequency of the oscillation, assuming no damping, if k= 125N/m and M= 250g. (I got the answer to be 5.03 hz) ...

**physics torque and shelf**

it won't let me post it. apparently it seems to be 34cm long, 2cm of which is inserted in in the slot. so the block is 34cmx3cm inserted in a 2cm long slot on the left.

**physics torque and shelf**

When a wood shelf of mass 6.1 kg is fastened inside a slot in a vertical support, the support exerts a torque on the shelf. The board is 32cm wide by 3cm tall. the slot is 2 cm wide (3cm tall)on the lefthand side. So there are three vertical forces. A) Calculate the upward for...

**physics incline**

problem is that i already used that for velocity (same answer) and it's not unfortunately not the right answer.

**physics loop (PLEASE HELP)**

i can't figure how to set this up. it starts at height h and there's a loop at at ground level with radius r.

**physics**

sorry, the units didn't show up. it's .36 m^2, 4.0cm, 45cm, 85cm, 2.4cm

**physics**

You need to siphon water from a clogged sink. The sink has an area of 0.36 and is filled to a height of 4.0 . Your siphon tube rises 45 above the bottom of the sink and then descends 85 to a pail as shown in the figure. The siphon tube has a diameter of 2.4 A)Assuming that the...

**math**

100%-15%= 85% 306/85%= 360 100%-10%= 90% 360/90%= 400 Hope this helps

**Algebra**

sovle the compound inequality 8<w+3<10

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