Alexandra

This page lists questions and answers that were posted by visitors named Alexandra.

Questions

The following questions were asked by visitors named Alexandra.

How can i make nine equations with the numbers 2, 7 and one other number to equal 8. The first equation should have one as the other number, then two and so on up to 9. I can only use a number once for each expression. I can use arithmetic symbols, decima...

How was the weather related to the amount of electricity used in Riverwood? What ways did the power company use the river to help out, or harm in that situation?

Find the domain and range y=x^2-3x+8. Explain how you found the domain and range.

Traditionally,how have different fields of earth science been studied?

how are scientist approaching the study of Earth today?

Where can i find out what format to type my Background Information that entails Activities I have been in, the awards I have received from them, and past jobs that i have had? Thankyou.

what is the 5th grade definition of calcium chloride

Is the experiment to recreate the big bang theory by colliding to atoms being continued? If successful, would it really create a black hole?

meobdailfr.... its french what is the unscrambled...

The adaptations of land-dwelling organisms forgetting oxygen show a trade-off of two needs. What are they?

Risk is to chance as forthought is to?

A 20.0kg mass is placed a the top of a 3.5m long, 15degree ramp. When released from rest, the mass accelerates down the ramp. The frictional force acting on the mass is 11.0 N. What is the velocity of the mass at the bottom of the ramp.

Let's say that you find a slope of 6.671×10-14 for square plates of width 11.5 cm. What do you get for the value of the permittivity of free space?

The quotient of two numbers is 8. The sum of the same two numbers is 72. What is the two numbers

A gas storage tank has a volume of 3.5*10^5 m^3 when the temperature is 27 degrees celcius and the pressure is 101 kPa. What is the new volume of the tank if the temperature drops to -10 degrees celcius and the pressure drops to 95 kPa?

Can you simplify 9 over 16?

In the study of biochemical processes, a common buffering agent is the weak base trishydroxymethylaminomethane, often abbreviated as Tris. At 25 C, Tris has a pKb of 5.91. The hydrochloride can be abbreviated as Tris HCl. What volume of 10.0 M NaOH is nee...

If you forget the product of 9 and 9, what can you do to figure it out?

A candy cane 30 cm high has a circumference of 3 cm. The red “ribbon” makes exactly 4 complete turns round the candy cane while its two ends touch the cane's top and bottom. How long is the ribbon in cm? It doesn't make any sense to me. Can somebody expla...

If 10.0 grams of sodium bicarbonate reacts with 50.0mL of 2M acetic acid, what is the limiting reactant? what reactant is in excess, and by how much? What volume of carbon dioxide gas would form?

How many moles of acetic acid are there in 25 mL container?

A green purse costs $11, which is 11 times as much as a red tie costs. How much does the red tie cost?

So I do know how to work out letter a) but I'm still very confused with parts b and c. Appreciate the help! 2FeN(s) + 3H2(g) --> 2Fe(s) + 2NH3(g) Suppose that the reaction is carried out at 300C and 3.00 atm. 1.00 grams of iron (III) nitride reacts. a)Wha...

Xe(g) + F2(g) ----uv light---> Xe F2(s) XeF2(g) + 2F2(g) ---catalyst---> XeF6(s) XeF6(s) + H2O(l) ------> Xe O3(s) + 6HF(g) Looking at these three reactions respond the following: a) For each 0.0250 grams of xenon hexaflouride that reacts, what mass of wa...

If the concentration of a reactant is decreased, will the speed of the reaction increase or decrease? Explain. I understand that if the concentration of a reactant is INCREASED, the frequency of coliision increases, making the rate of reaction increase. H...

how can you find out how many slices your class needs if each pizza has 8 slices and ther are 28 kids?

An object of mass 5 kg is dropped from a certain height. Just before it strikes the ground it has a kinetic energy of 1250 J. From what height was the object dropped? Ignore air resistance and use g = 10 m/s2.

A 16.0-N weight slides down a rough inclined plane that makes an angle of 28.0° with the horizontal. The weight, which started from rest, gains a speed of 15.0 m/s after sliding 150 m. How much work is done against friction?

A 20-N horizontal force pushes an object along a rough floor so that the object moves with a constant velocity of 7.0 m/s. How much power does this force deliver to the object?

If the puck strikes the goalie's pads and stops in a distance of 4.14 cm, what average force is exerted on the pads? Answer in units of N. This is part three of three parts. 1st Part: A player strikes a hockey puck giving it a velocity of 39.486 m/s. The...

Evaluate each of the following. Show all your calculations. a) f'(3) if f(x) = x^4 − 3x b) f' (−2) if f(x) = 2x^3 + 4x^2 − 5x + 8 c) f" (1) if f(X) = −3x^2 − 5x + 7 d)f" (−3) if f(x) = 4x^3 − 3x^2 + 2x − 6...

Evaluate each of the following. Show all your calculations. a) f'(3) if f(x) = x^4 − 3x b) f' (−2) if f(x) = 2x^3 + 4x^2 − 5x + 8 c) f" (1) if f(X) = −3x^2 − 5x + 7 d)f" (−3) if f(x) = 4x^3 − 3x^2 + 2x − 6...

The Environmental Protection Agency set a standard of 50 parts per billion of lead in drinking water. A new standard was set that safe water contains less than 15 parts per billion. a) write each of these rates as fractions using positive powers of ten. b...

The manager of a shopping mall was asked to rope off a rectangular section of the parking lot for an automobile show. The area roped off was 250 ft by 300 ft. Post were to be placed every 25 ft around the lot. How many posts were needed? The one question...

How did Renaissance thinkers think the individual was defined? Explain how this idea can be compared with the value of an individual in ancient Roman and medieval European societies. Any help with this question would be greatly appreciated. Please and tha...

How do you parse these words? 1. Rendition 2. Ambiguous 3. Deleterious 4. Euphemism 5. Alacrity 6. Respite 7. Polemical 8. Timorous 9. Adulation 10. Eschew

A bottle of 12.0 M hydrochloric acid has only 35.7 mL left in it. What will the HCl concentration be if the solution is diluted to 250.0 mL?

The reaction: 2C2H2+5O2->5O2->4CO2+2H2O is performed by mixing 175 grams of C2H2 and 175 grams of O2 to produce 127 grams of CO2 1)Limiting reagent 2)Theretical yeield of CO2 3)Percent yield of CO2

write the correct net ionic equation and identify spectator ions when CoSO4 and BaCL2 mix

A vending machine had to be programmed to accept any combination of nickels, dimes, and quarters that totals 40 cents. How many different combinations are possible?

Which of the following is a single replacement? a. KOH + HCl --> KCl + H2O b. 2Na + 2H2O --> H2 + 2NaOH c. 2C2H6 + 7O2 --> 4CO2 + 6H2O d. H2O + CO2 --> H2CO3 Any help would be appreciated, thank you in advance!

C(s) + H2O(g) + Heat <--> CO(g) + H2(g) 17. How would you adjust the temperature to increase the amount of product? 18. Does the removal of hydrogen gas as it is produced shift the reaction to the left or the right? My last two questions on my homework th...

24. What happens when a solution of nitric acid (HNO3) is added to a solution of potassium hydroxide (KOH)? What are the products? 25. Which of the following compounds can react with H2SO4 to form a salt: NaCl, Ca(OH)2, HF, AlCl3, H2O, Mg(OH)2? Name the s...

In a fetal pig, what are the 4 lobes of the brain and their functions?

Two girls decide to jump off a diving board. Katherine steps off the diving board. Anna runs straight off the diving board so that her initial velocity is solely horizontal. They both leave the diving board at the same time. Which one lands in the water f...

A cannon is fired horizontally from atop a 40.0 m tower. The cannonball travels 180 m horizontally before it strikes the ground. With what velocity did the ball leave the muzzle? Okay so this is my work for this problem. please help If I did something wro...

A large pot is placed on a stove and 1.2 kg of water at 14°C is added to the pot. The temperature of the water is raised evenly to 100°C just before it starts to boil. (a) What amount of heat is absorbed by the water in reaching 100°C? (b) The water then...

I need help because I don't understand how to solve this equation. 37. x/a - 1 = y/b for x So... does it mean solve for x? 39. V = 1/3 * pi * radius^2 * h for h So... does it mean solve for h? As you can see, I am really confused. Please help.

I've tried so hard on this and I'm completely hopeless, can somebody help me out? Please it would mean a lot. Task 1 find the rate of change for each table, equation, or graph. How did you find the rate of change? Task 1 A. X 2 4 6 Y 10 20 30 Rate of chan...

If a saturated solution of Potassium Chlorate at 80 degrees celsius cools to room temperature (25 degrees celsius), how many grams of crystals form?

Find all real numbers x satisfying the equation: 2^x + 3^x - 4^x + 6^x - 9^x = 1. Please help me. I really don't know what to do.

Calculate the momentum of a bullet moving with a velocity of 1000m/s ,if it has a mass of 0.01kg

What is the probability of winning the jackpot if you play the Florida lotto? What is the probability of winning that jackpot if you play Mega Millions? What is the probability of winning the jackpot if you play Powerball?

List sources of internal pressure and external pressure

What is 3/5 of 25?

A ramp has been rise of 1.5 m for every 12 m of run. What is the slope of the ramp?

Initially a 1 L vessel contains 10 moles of NO2 and 6 moles of O2. At equilibrium, the vessel contains 8.8 moles of NO2. Determine Kc. Please help

Why was it smart for European colonial powers to wield power in their newly-acquired colonies through indirect rule? Can you draw parallelisms with previous dominant civilizations?

If the hypotenuse of a triangle is 15 yds, and one leg is 12 yds, what is the length of the other leg? Also how do you find the answer

Consider the quotient, f(x)/x-h What is the remainder of this quotient? My answer- f(x-h)

1.Carbon-14 is a radioactive isotope. What is an isotope? What is the approximate half-life of carbon-14?

Which section of the country will be affected by the embargo of 1807?

The perimeter of the triangle is 25 meters. The first side is 7 meters longer than the third side. The second side is 4 times the length of the third side. Find the sides of the triangles

How do you find the limiting reactant in a single replacement reaction?

negative point one times two thirds

Answers

The following answers were posted by visitors named Alexandra.

U should try 2 change the denominators to make them alike so u will have 2 find tha least common denominator...

I have to do a French collection about my playmobile I am 11 years old in grade five. How do I go about it.

Im not really sure, that is all that as being asked. Maybe it has to do with this first question as well?.... The electric field near the surface of a uniformly charged conducting plane can be determined by Gauss's law (look it up). If the plane is a squa...

That is my guess, that decreasing the concnetration of a reactant will decrease the rate of the reaction because there is a decrease in the frequency of collisions. Am I right?

It does, thank you for the help! :)

9 rights X $4 = 36 36 + $50 Stock = $86 Ex rights value of Fogel stock is $86.

Calculate the density of a material that has a mass 100g and a volume of 10 cm3

Hi how do objects with opposite charges affect eachother and how do objects with the same charge affect eachother ?

Breaking them into prefix, root, and suffix. And also telling what the prefix, root, and suffix mean.

49^2+112r+64 = ___ First take care of the exponents: 49^2=2401 Add like terms: (2401+64)+112r 2401+64= 2465 2465 + 112r is your answer.

Thank you very much!

146/144=1.01388888889 171/1.01388888889=168.657534246 ans-168.657534246

What equation would I use for this?

I'm sorry. I don't really get what you are doing. Can you explain?

Thanks, I already know that 0 is the answer but I don't know how to arrive to that. Huhu, I don't know the solution. Please help me, thanks.

Amy has 80 photos for her scrapbook. If she can fit 4 photos on each page of the 15 pages she has how many more does she need to buy

Yes girl the answer is corret beacuse it is 700.Oxoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxoxocoxoxoxoxoxoxo.

He felt like being random that day.

Frictional Force=1/2mv^2/d =1/2(0.5)(0.2)^2/0.7 =1/2(0.5)(0.04)/0.7 =1/2(0.02)/0.7 =0.01/0.7 =0.0142857143 =0.0143 N

What solid figure can you make if you combine two congruent cubes

I'm not sure, this was all that I was given

6 minutes my friend :)

I cant believe you Leah, do your school work yourself!! Just so you know it's Jazmine! I'm telling mom!

skylir is write I got an 100%

Thank you molly! 1.c 2.c 3.a 4.a

Thanks connecxes!

A number rounded to the nearest thousand 47,000

i need help to :(

possibly its A. btw people you all have a nice name ya'll know that?

skellydude i agree with you and sorry for putting this in public but ya'll gotta stop being mean because just like skelly said" Don't come on here if all your gonna do is be rude" because that is gonna bring concequences. even the TEACHER says" and your a...

you are all awesome! and i think number two is letter c.

lolololololololololol

Thank you so much!! I understand expanded algorithm so much better now!

tank shoo Mrs. Sue

So, first you look at the place value that the 9 is in. Then, if you have a place value chart, you would start with the number 5 in the hundred thousands place and then create the number 597,184. Finally, you look and see that the number 9 in the number 5...

Of you divide 45 and 90 u will get 2 so it tales 2 minutes per book soo 120 x 2=240 240=4 hours

For number 1, I think its A and B

You don't have to be such a bully to others, Anonymous.

I'd answer but i'm horrible in Mathematics.

My point is NEITHER of them tried to help him, yes the answer shouldn't be given out but they should at least help a little.

This website was made to at least help students.

what the answer

oi is correct! Thank u so much i am terrible at this unit 😂