# Posts by matthew

Total # Posts: 698

**College Chemistry**

A 86.3mL sample of water is initially at 17.4 degC. How many kilojoules (kJ) of heat must be added to raise the temperature of the water to 31.8? The specific heat capacity of water is 4.184 J/g.degC. How do I set this up to find the answer. Really confused,we haven't been...

**Chemistry**

How many moles of nitrate ions are present in 24.0mL of a 2.93M solution of potassium nitrate? I'm thinking this is some form of unit conversion problem I know that M= molarity which is mol/L how ever I am confused on how to set this up and input information or if I'm ...

**english**

Yes! Thank you i took your advice from last time and it worked!! Thanks you're awesome!

**english**

Which of the following contains a comma splice? Geraldine is a volleyball star, she generated most of the points for her team. ** Obviously, the pull of gravity effectively keeps us from flying off into space. The letter on the coffee table, a note from the president, arrived ...

**english**

okay thank you.

**english**

would it be "Molimo has all the ingredients: dough, tomatoe sauce, pepperoni, and shredded cheese." and "Ivan arrived late to the theater consequently, he could not enter until intermission. "?

**english**

Which sentence is correctly punctuated? Ivan arrived late to the theater, consequently, he could not enter until intermission.** Ivan arrived late to the theater consequently, he could not enter until intermission. Ivan arrived late to the theater. consequently, he could not ...

**Probablity **

Having a hard time with this question: Help Please With Replacement: This is a multi-stage experiment. There are 7 colored cubes in a bag. The colors are purple, blue, red, orange, white, yellow, and green. This is a multi-stage experiment with dependent events. Determine the ...

**Math **

This 3 dimensional shape has 6 faces that are triangles as well as one base that is a polygon. What is this shape?

**Probablity**

I think it is with replacement. The question doesn't say

**Probablity **

Having a hard time with this question: Help Please This is a multi-stage experiment. There are 7 colored cubes in a bag. The colors are purple, blue, red, orange, white, yellow, and green. This is a multi-stage experiment with dependent events. Determine the probabilities of ...

**Probablity **

There is a bag with 200 cubes in it. Some of the cubes are red and some are black. You reach into the bag 20 times, each time picking up random cube, recording its color, and putting the cube back in the bag. You picked 7 black cubes and 13 red cubes. With this information, ...

**math**

Circle the prime numbers in the following set of numbers. Show your work. 953, 1,427, 2,971 I can tell whether each number is prime but I am having a hard time with individual numbers

**psychology**

Something along the lines of... The people that pick up litter come in all shapes, sexes and colors topic sentences need to establish the topic quickly and concisely

**psychology**

Couldn't it be as simple as placing a piece of trash on the floor in a mall and see how many people pick it up and throw it away in an hour. Fake results being 12 people out 25 picked it up, 6 of the 13 who didn't pick it up didn't even look at it

**Science**

momentum=mass(kg) multipled by speed(m/s)

**Chemistry**

If 50.00 mL of 0.250 M barium nitrate are combined with 50.00 mL of 0.400 M sodium sulfate, how any grams of precipitate will form? I'd really appreciate it if someone could walk me through this problem. I don't want the answer, I just want to have a hint at which ...

**English**

1. D 2. TRUE 3. C 4. C 5. TRUE 6. B 7. A, C, & D 8. A, B, C, E, & G 100% correct.

**English**

#1 is D.

**pre calc**

write the equation in the slope-intercept form 8x ? 3y + 6 = 0

**History**

You're a bit late. But thanks Ms. Sue

**History**

PLEASE HELP!!! What role did the city of Wittenberg, Germany play in the renaissance?

**Math**

Check** Not 'chack'

**Math**

PLEASE CHACK MY ANSWER!!! Discussion for Applications of Linear Systems When solving a system of equations, how do you determine which method to use? My answer: I determine which method to use by looking at the equations. If both equations are in slope-intercept form, I choose...

**very hard PHYSICS QUESTION**

Consider a solid ball of mass m = 50g and is placed on a long flat slope that makes an angle of 30° to the horizontal. The ball was initially at rest and was then released such that it rolled down the slope without slipping. With a detailed explanation of your method ...

**Physics**

query=a stone of mass 30grams is placed in a measuring cylinder containing some water. the reading of the water level increases from 50cm cubic to 60cm cubic. what is the density of the stone?

**Algebra**

you are the manager of a firm that produces two products X and Y at zero cost. there are three types of consumers(1000 of each type) with the following valuations of the two products. consumer type Product X($) ProductY($) 1 90 60 2 70 140 3 40 160 What are your profits if you...

**Science-physics**

A bottle weighs 35g when empty,95g when filled with water and 119g when filled with an organic liquid. What is the capacity of the bottle: A-60cm cube B-84cm cube C-130cm cube D-154cm cube

**Math**

A submarine at -28 feet dives 40 feet. What is the submarine's elevation after the dive?

**Chemistry**

A sample of cobalt, A, with a mass of 5g is initially at 25 degrees Celsius. When this sample gains 6.70J of heat, the temperature rises to 27.9 degrees Celsius. Another sample of cobalt B with a mass of 7 g is initially at 25 degrees Celsius. If sample B gains 5 J of heat, ...

**social studies**

Mrs. Sue I need your help. Which statement BEST describes the power of government provided by the Articles of Confederation? A) The national government held most of the power. B) Congress enforced its power by taxing the states. C) The states had more power than the national ...

**art**

Its 1b 2 d 3 a just took the test 100% correct i promise

**Math**

All the odd numbers from 51 to 5001 are written. What is the total number of digits used?

**math probability**

Assume that every time you buy an item of the Hong Kong Disney series, you receive one of the four types of cards, each with a cartoon character Mickey, Minnie, Donald and Daisy with an equal probability. Over a period of time, you buy 6 items of the series. What is the ...

**Algebra**

A rock is thrown upward with a velocity of 21 meters per second from the top of a 48 meter high cliff, and it misses the cliff on the way back down. When will the rock be 7 meters from the water, below? Round your answer to two decimal places.

**Health**

I thick c

**Math**

Find the area of each triangle with the given dimensions Base=3 centimeter, height =3centimeter

**Ecology**

an endemic species is best defined as a species that

**Math**

Please help me with that test!!

**Physics**

A charge of -5.02 μC is traveling at a speed of 8.86 × 106 m/s in a region of space where there is a magnetic field. The angle between the velocity of the charge and the field is 54.6o. A force of magnitude7.85 × 10-3 N acts on the charge. What is the ...

**Chemistry**

What is the molar mass of toluene if 0.85 g of toluene depresses the freezing point of 100 g of benzene by 0.47 degrees celsius? Kf= 5.12 C/m

**math**

A crowd of people is watching a live TV show in an auditorium. Section B of the auditorium has eight rows of seats. Each row has 10 seats. If 75 percent of Section B is occupied, how many people are seated in that section?

**Chemistry**

At 350 K, Kc = 0.142 for the reaction 2 BrCl(g) ⇀↽ Br2(g) + Cl2(g) An equilibrium mixture at this temperature contains equal concentrations of bromine and chlorine, 0.077 mol/L. What is the equilibrium concentration of BrCl?

**help azap math**

C. yards

**math**

you and your friend are selling tickets to a charity event. you sell 9 adult and 13 student tickets for 212 dollars. your friend sells 4 adult and 15 student tickets for 168 dollars. what was the cost of a student ticket.

**Physics**

Bob (80 kg) lands with a resultant GRF of 1200 N at an angle of 80 degrees from the horizontal. What was his vertical acceleration during landing? If his vertical velocity at initial contact of landing is 3.0 m/s, how much work is required to bring his body to a complete stop...

**Physics**

Bob (80 kg) lands with a resultant GRF of 1200 N at an angle of 80 degrees from the horizontal. Round answers to nearest whole number. What was his vertical acceleration during landing?

**Functions, graphs**

f(x)=(x+1)/(1+x^2) a) explain why the graph lies above the x axis on the interval x=0 and x=sqrt(3) b)write an expression using the indefinite integral that gives the area between the graph f and the x axis between the values x=0 and x=sqrt(3). c)use integration to find the ...

**Maxima, Stationary Points**

Thanks Reiny, Ive had a look on wolfram alpha and seen the solutions. My problem is I need to show it using Maxima but for some reason Maxima will not solve my equation 9x^6 + 28x^4 + 51x^2 - 88x - 10 = 0. So frustrating.

**Math Algebra**

Learning Center would like a possible net profit of $650,000 on its new resource manual it sells to schools. The fixed costs for producing the manual are $780,000 and the variable cost per package is $19.85. If the estimated unit sales are 1,250,000 units, what selling price ...

**algebra**

The formula will be A=P(1+r/n)^nt P stands for the initial amount invested, so P= 4000 R is the rate (.04), and N is the amount of times it is compounded per year (1). For example, saying "compounded quarterly" would make n=4. T is, of course, time (3). This makes ...

**Physics**

A spherical satellite has 12 identical monopropellant thrust chambers for attitude control with the following performance characteristics: thrust (each unit): 5 lbf; Is (steady state or more than 2 sec): 240 sec; Is (pulsing duration 20 msec): 150 sec; Is (pulsing duration 100...

**Math question/help please!**

Jacklynn draws two adjacent angles that form a right triangle. One angle measures 32°. What is the measure of the other angle?

**Physics**

(Someone please help me !! I don't understand this.) Two tiny conducting spheres are identical and carry charges of -27.3C and +61.0C. They are separated by a distance of 2.64 cm. (a) What is the magnitude of the force that each sphere experiences? (b) The spheres are ...

**math**

Chelsea has 10 yards of yarn. How many bows can be made if each bow uses 2/3 yard of yarn? Draw a diagram that represents the situation. How many 2/3 yard did he cut? Does he have any left over? How much? Write a division sentence to show the situation.

**chem**

The temperature of a 80.0 g sample of mate- rial increases from 15.0◦C to 42.0◦C when it absorbs 4.00 kJ of energy as heat. What is the specific heat of this material? Answer in units of J/g · K.

**science**

False

**History,Business Studies,Maths Lit,Cat,English,Afrikaans**

What can I study after Grade 12

**English**

I have to do a 10-minute speech based on this: Give an account of Britain’s colonial policies concerning Africa, Australia, India, and New Zealand in the 19th century. I have little to no prior knowledge of this, so I'm not really sure where to start, or what I can ...

**Chemestry**

2FE+3O2=2FE+2O3 so=2FE2O3

**Algebra**

If x varies directly as y and x=9 when y=2 find x when y is 6

**geography**

Where did the Cold War take place?Please just be specific(answer in countries).

**math**

Least to greatest quart gallon liter pint cup deciliter

**Programming**

Create and test a Visual Basic application to allow teachers to enter student results. One dimension of the array will hold the results for up to 10 students. The other dimension will hold up to 5 subjects. Additionally a string based array will hold the names of the subjects...

**ELA Reading**

Lun is right

**Norman**

Algebra 2 The difference of two numbers is 4. Three times the smaller minus the larger is 10. Find the numbers.

**science**

What is the rarest element?

**math**

What is the hardest expression in the world?

**math**

What is 57 divided by 2.95

**Math**

A scuba diver dives to a depth to a of 50 feet, then rises 15 feet, sinks 12 feet, then rises 20 feet, whats the answer?

**Math**

Suppose that a wind is blowing in the direction S45°E at a speed of 50 km/h. A pilot is steering a plane in the direction N60°E at an airspeed (speed in still air) of 150 km/h. The true course, or track, of the plane is the direction of the resultant of the velocity ...

**Algebra 1**

Find the range of f(x)=-x+4 for the domain {-3,-2,-1,1} A) {7, 6, 5, 3} B) {7, 6, 5, 4} C) {-7,-6,-5,3} D) {-7,-6,-5,4}

**Science**

I promise is correct except #2 is C

**governmnt**

Congress convenues every two years on_____of every____ year.

**Chemistry**

1.1026 ATM 3ATM •50ml/150ml•310k/281.15k=1.1026

**math**

Box B by $0.04 or 12in.^2

**Pre-calc**

There exist constants a, b, c, and d such that(sin x)^7 = asin 7x + bsin 5x + csin 3x + dsin x for all angles x. Find d. I tried rewriting them in the exponential form, but it becomes ugly as there are many negative cosines and divisions of i. Help?

**Physics**

A skateboarder approaches the circular hill with a velocity of 8.0 m/s at point B. The angle formed between the lines that join point AO and BO is 20 degrees. a) what is her speed at the top of the hill(Point A) if she coasts up to this point? b) what min speed must she have ...

**PLEASE HELP?????LANGAGUE ARTS**

The answers are going to be different depending on what school you go to and which test you receive. Have each question listed with the multiple choice answers, placing stars after the answer you believe it to be, and listing the poem/writing associated with the questions is ...

**sssssocial studies please**

Connectionso Academy: 1. C,D 2. B,D 3. B,C 4. D

**chemistry**

why doesnt the radius ratio rule work for TlCl3??? the division would be the radius of the cation / radius of the anion. For Tl3+ and Cl-...88pm/181pm = .49 which would correspond to a 'zinc blende' crystal structure and not a CsCl type crystal as the rest of the ...

**science**

I would say it is 0 because work is the a function of Force and horizontal displacement.

**Art 7**

Number 3 is D and Number 7 is D

**math**

A cyclist covers his outward journey downhill at 24mph. His return journey, over exactly the same distance uphill, is covered at only 12mph. What is the cyclist's average speed over the entire journey?

**Chemistry Help**

How many moles of H2 and N2 can be formed by the decomposition of 0.250 mol of ammonia, NH3? Is it 0.250*3mol H2=0.75 0.25*1mol N2=0.25 Am I correct?

**Chemistry Help**

oh i got it... thank you so much

**Chemistry Help**

so i have to do 1/2*0.00759=0.003795 = 3.795 mL is the answer?

**Chemistry Help**

Ba(OH)2 is 1/2 How can you get 1/2 from.

**Chemistry Help**

I still have problem on how can you get mols Ba(OH)2 from. Can you explain please

**Chemistry Help**

How many milliliters of 0.534 M Ba(OH)2 solution are needed to completely neutralize 34.5 mL of 0.220 M HBr solution? The reaction is Ba(OH)2(aq) + 2HBr(aq) → BaBr2(aq) + 2H2O(l) I did 0.0345 * 0.220 = 0.00759 Moles of HCl =2*0.00759= 0.01518 0.01518*1000= 15.18 mL ...

**Chemistry Need Help**

Thanks both of your replied. I got it now :)

**Chemistry Need Help**

Sorry but I still don't understand your explaining. Can you explain more briefly please. Thanks.

**Chemistry Need Help**

Cl2 + F2 -> 2ClF

**Chemistry Need Help**

Given the chemical equation, Cl2 + F2 2ClF, how many moles of ClF are produced in the reaction, if 1.50 moles Cl2 are made to react with 1.75 moles F2 ? I got the answer 3.50 moles but it was wrong. Can anyone help me please.

**Math**

1 inch = 15 miles: Franklin to Washington is 45 Miles (3 inches) Franklin to Lincoln is 30 miles (2 inches) How much farther from Franklin is Washington than is Lincoln? I worked it out to be 7 1/2 miles but my teacher says I am wrong? She says the answer is either 11 - 17 - ...

**science**

two small spheres lie 1.5 meters apart and carry identical charges. How large is the charge on each if a sphere experiences a force of 2.0 N.

**Math**

47. For science class, Kyle needs to make a dilute solution of 12 ounces that is 30% vinegar. But he only has 20% vinegar 60^ vinegar. How many ounces of 20% vinegar should he use? A. 3 ounces B. 6 ounces C. 9 ounces D. 10 ounces

**Math**

In triangle ABC, the degree measure of angle A is 20 degree greater than the degree measure of angle B. Angle C is a right angle. What is the measure of angle B? Is it 70 degrees. 90-20=70

**Calculus**

Ohhhhhhhhh THANKS

**Calculus**

F(x) = 3/4x^4 –x^3 -3x^2 + 6x Determine the interval(s) where f(x) is increasing (if any) and the interval(s) where f(x) is decreasing (if any). How do I know where f(x) is increasing or decreasing?