corey

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

Questions

The following questions were asked by visitors named corey.

How many moles of solid Ba(NO3)2 should be added to 300 ml of .2 M Fe(NO3)3 to increase the concentration of NO3- ion to 1 M?

What is the finaly concentration of barium ions, Ba2+, in soulution with 100 ml of .1 M BaCl2 is mixed with 100ml of .05M H2SO4?

5Fe(2+ charge) + MnO4(-1 charge) +8H(1+ charge) -> 5Fe(3+ charge) + Mn(2+ charge) + 4H2O In a titration experiment based on the equation above, 25ml of an Acidified Fe(2+ charge) solution requires 14 ml of standard .050 M MnO4(1- charge) solution to reach...

A 1.0 L sample of an aqueous solution contains .1 mol of NaCl and .1 mole of CaCl2. What is the minimum number of moles of AgNO3 that must be added to the solution in order to precipitate all of the Cl(1- charge) as AgCl?(assume that AgCl is insoluble.)

It requires 30ml of .5M H3PO4 to titrate 45ml of Ca(OH)2 to the equivalence point. What is the M of the base?

The following problems deal with REDOX: identify the oxidation numbers, etc. a) KMnO4 Mn b)Fe(NO3)2 Fe c)NO2 O

A 2.3g sample of MgX is reacted with NaOH. The Mg(OH)2 precipitate had a mass of 1.8g. What is the % of Mg in the original sample?

Determine a compound that will precipitate the (Hg2)^2+ in Hg2X2(soluble).

if you have Ca(NO3)2 times xH2O do u count the Hydrate when looking for the mass % of Ca

H2+I2->2HI If 3 moles of H2, I2, and HI are in a 3L flask, what will be the equilibrium amount of each. Kc=5 The answer is H2= I2= .71M, HI= 1.584M(given by teacher) Just need to know how to do the work.

What is the hydroxide concentration if the hydronium is .03 M?

There are 48 small gift bags. Each bag can hold 1 toy and 6 stickers. If an equal number of stickers are put in each bag, how many stickers will be in each bag?

Find the grams of NaF added to 300ml of .2M HF to create a buffer with pH=3.5.

First grade math Tell the Rule? Group 1 3 flowers w/4 petals each Group 2 3 flowers w/five petals each in triangle?

How do you factor out perfect square trinomials?

Can you give a step by step example of how to factor a perfect square trinomial? Please :)

What if the last term has a square root that is a big, long decimal? you wouldn't use the decimal, would you?

the speed of light is about 3.00 x 10^8 m/s. convert this figure to miles per hour

1) A spherical surface completely surrounds a collection of charges. Find the electric flux through the surface if the collection consists of a single +3.93E-6 C charge. 2) A plate carries a charge of -2.52μC, while a rod carries a charge of +2.19μC. How...

A hydraulic jack in a gas station lifts a 900kg car a distance of .25cm When a force of 150N pushes a piston through a distance of 20cm Find the IMA (book answer is 80) AMA (book answer is 59) Efficency (book answer is 74%) can you help, I have no idea ho...

Part 2: Now it’s time to make the guest list! Figure out how many guests you will have at your party, and how much it will cost to feed everybody. You have four grandparents coming. For the adults, you have your parents, your best friend’s parents, your a...

can u calculate the number of moles 0.5g of H?

How did the Revolution affect religion in America?

identify four key milestones in the development of cognitive psychology as a discipline?

The freshman class is building a float for homecoming.One side of the float has a shape of a parallelogram with base of 12' and height of 6'. To complete the float the class must buy tissue to cover the side. It takes 3 boxes of tissue to cover each foot....

A car license plate consists of 6 characters. The first 3 characters are letters excluding I, O, Q and U. The last 3 characters are any of the numerals 0 to 9 inclusive. How many different license plates are possible? Please show your work.

A car license plate consists of 6 characters. The first 2 characters are any letter. The last 4 characters are odd numbers from 1 to 9 inclusive. How many different license plates are possible? Please show your work.

There are 6 boys and 8 girls in a group of students. Calculate the number of ways that a president, vice-president and treasurer can be selected. Please show your work.

There are 6 boys and 8 girls in a group of students. Calculate the number of ways that a committee of 3 students which has at least 1 girl can be selected from the group. Please show your work.

Solve the following equations algebraically for n. Show your working using factorial notation. a) n!/3!(n-2)! = 12 b) 8Pn = 6720

What is the 8th term of (3x-1/2y)^10

A committee of 4 is chosen from a group of 10 women and 6 men. Determine the probability that at least 2 women are on the committee. Please show your work.

A multiple-choice test has 10 questions. Each question has 5 choices. If a student answers each question by guessing randomly, find the probability that the student gets: a) at most 4 questions correct b) at least 7 questions correct Please show your work...

A company has two factories that manufacture tires. Suppose 65% of the tires are manufactured in factory 1 and 35% are manufactured in factory 2. In factory 1, 5% of the tires are defective. In factory 2, 2% of the tires are defective. a) Determine the pr...

It has been determined that 30% of students at a certain high school own a cell phone. If 95 students are randomly selected determine the probability that exactly 20 students own a cell phone. *if using a calculator show syntax used*

What is the concentration of an HCl solution if 23.1 mL of HCl are needed to neutralize completely 35.0 mL of 0.101 M Ba(OH)2 I cannot get the right answer

What is the concentration of an HCl solution if 23.1 mL of HCl are needed to neutralize completely 35.0 mL of 0.101 M Ba(OH)2 I cannot get the right answer (Macic)(23.1mL)=(0.101M)(35.0mL) Macid = .153

help me find which reactant is the limiting reactant when 74 g NaOH and 44 g CO2 are allowed to react when the equation is (2NaOH+1CO2=Na2CO3+1H2O)

identify the two numbers less than 20 with the most factors

a frog sat on a number line, it was on the number 18. it made two equal hops and anded at 0. where did it land first?

Came to America to find freedom to worship and the Promised Land =a.)The North--Puritanism b.)The South---Gentlemen Planters c.)Both

on January they sold 139 more Doughlas firs than Noble firs. The toal trees sold was 377. which of these is right for me to solve it?? n-139=377 n+139 = 377 2n +139 =377 2n+139 = 377 I think it is the first one??

55h + 275 = 440 Do I subtract 55 from 275 ?

round to nearest hundred. 113, 279, 367

which number is this rounded too, the nearest ten or hundred? 557 rounds 560

how can addition properties help me add whole numbers?

can the commutative property be used for subtraction? explain

Mariah and Claire made a bowl of punch. Claire used 10 times as much lemonade as Mariah did. If Mariah used 3/5 of a cup of lemonade, how many cups of lemonade did Claire use?

A bookshelf is at rest in a room. A force of 35.0 newtons is applied to a bookshelf. If the floor imparts a frictional force of 2.90 newtons, what is the net force acting on the bookshelf?

if a driver is at an acute angle and wants to be completely straight as she enters the pool. what will be the measure of the angle her body will form then?

The number of years that a stock of $40 increases to $50 at a rate of 8% per year can be written by the logarithmic expression: log1.08(50 over 40) a. use your calculator to determine how many years it will take for the stock to reach $50.

Chemistry. AN UNKNOwn gas has a pressure of 2.0, a volume of 15.0 L and a temperature of 348 Kelvin. The sample weighs 4.20 grams. What is its molecular weight. I am trying to find formula

Elmer has a collection of 300 fossils. Of these, 21%, percent are fossilized snail shells.

A rectangle with a perimeter of 40 units is graphed on a coordinate grid. The rectangle is dilated by a scale factor of 0.3 with the origin as the center of dilation. If (x, y) represents the location of any point on the original rectangle, which ordered...

Answers

The following answers were posted by visitors named corey.

I come up with 1.4M for the answer but the paper says the answer is .14M. I know it is only minor but i want to find my mistake. heres my work: (.14L)(.5M)= .07mol/1mol=.07x5mol=.35mol/.25L=1.4M

what is the Ka of HF?

I came up with -5.4 x 10^-4.

the climate in the tropical zone is characterized by

thank you so much. how come it wouldn't be 22P3*10P3?

thank you so much!

(Macic)(23.1mL)=(0.101M)(35.0mL) Macid = .153

Thanks, Writeacher (Very Helpful). I had an idea this was the answer.

Two times the number of trees wich is 2n right? Thanks!!!!!!!!!!!!!!!!!!!!!

Complete function table. Then I need to write a rule for the function. I typed it as it shows on the function colum box. Do I subtract to get the missing number ? Like -3 Input doesn't have anything next to it in the output column.

which two governments governed most of central america

Don't no¡!!!¡!!!!😡😉😯😃😉

use unit price to find total price 7 gallons at $1.88 per gallon and find the priss

its matter of fact manner

this is so easy im finna go to 7th grade and finna graduate