# Posts by Maria

Total # Posts: 2,003

**Organic Chemistry**

Assuming you have a mixture of 2-nitrophenol and 4-nitrophenol, which solvent would be most suitable for recrystallization if you want to isolate 4-nitrophenol? Water Diethyl ether Toluene Acetone Ethanol

**Organic Chemistry**

Which purpose does recrystallization serve? (Select all correct answers.) It is used to purify liquids. To separate unreacted solid starting materials from the solid target compound. To remove a solid from a liquid. It is used to purify solids. Improve the yield of the compound

**Organic Chemistry**

Compound A is recrystallized from n-propanol. Given are the following solubilities (in 100 mL of solvent): 160 g/100 °C, 100 g/80 °C, 60 g/60 °C, 20 g/20 °C, 15 g/10 °C and 10 g/0 °C. How many milliliters of solvent are needed to dissolve 80.0 g of ...

**math**

what is the capasity of a god fish bowl

**finance**

How much would I have to put away annually to accumulate 50,000 in 8 years given an investment of 10% compounding savings?

**math**

180

**9th grade**

(p-7)(p+8)

**Religion**

Origen was the first Bishop of ______in what year. Studying for midterm and this is one of the questions I can't find an answer to

**marketing**

In Customer Relationship Management (CRM)what is lifetime value of customer? The definition states...The potential profit generated by a single customer’s purchase of a firm’s products over the customer’s lifetime. I am not understanding this fully

**Religion**

What was Eusebius branded as for his unorthodox beliefs prior to the council of Nicea?

**us history**

the slaved-based economy in the south is created by?

**college**

how to write a persuasive essay using a strategy of convincing my employer of the value of providing tuition reimbursement and making extra time for adult learning.

**Math**

5+5= 10+10= 11+11=

**chemistry**

how can you fill a flask with pure oxygen without mixing it with air

**trigonometry**

A 200 ft guy wire is attached to the top of a tower.If the wire makes a 55 grados angle with the ground, how tall is the tower?

**Statistics 250**

a.far above average

**Chemistry**

Daniel cell is a primary cell which cannot supply steady current for a long time. Daniel cell produces an emf of 1.08 volt.

**Math**

1. Write the balanced chemical equation for the reaction NaOH + HCI --> NaCI + H20 2. Extract the relevant information from the qustion: NaOH v= 30mL, M=0.10 HCI v= 25.0 mL, M=? 3. Convert to Liters NaOH v= 0.03 L, M= 0.10M HCI v=0.025L, M=? 4. Calculate moles NaOh: n(NaOH...

**Accountng**

On january 1st, NetSolutions had a debit balance of $1,250.00 in the Office Supplies account. During the month, Netsolutions purchased $245.00 and $610.00 of office supplies and journalized them to the office supplies asse account upon purchasing. On January 31st an inspection...

**accounting**

12000 divided by 5 days is =2400x2=4800(tuesday)2400x3=7200

**math-a.s.a.p.**

what is the value of the expression blow if a=4 and b=-4

**207 Business ethics**

A foreign individual filled an application in a company where his friend works, she works in a HR department and she is trying to accomodate him. The application went to final approval and the owner rejected because he has a policy where he doesn not want his company involved ...

**207 Business ethics**

I need help with propose new hiring practices for the company to follow. In your proposal address the legal and ethical issues involved in discrimination and affirmativew action policies

**accounting**

How do you journalize on Feb 10: Paid for goods purchased on Feb 3? for feb 3 I put down Inventory and Accounts payable for $5,500.

**Chemistry**

A gas occupies a volume of 140 mL at 35 degrees celcius and 97 kPa. What is the volume of the gas at STP? Please show the work.

**Spanish**

Does anyone know how to say immiscible in spanish?

**College Algebra**

Why does the inequality sign change when both sides are multiplied or divided by a negative number? Does this happen with equations? Why or why not?

**Math**

If 3 people are asked what day of the week they were born, find the probability that i) 2 or 3 are the same. ii) only 2 people are the same. - is this 1/7 x 1/7 ?? If 4 people are asked what day of the week they were born, what is the probability that 2 or more people were ...

**Math**

There is exactly the same number of lollies in 10 different colours in a jar. (There are thousands of each lolly) If one lolly is picked out , the probability of being one colour is 1/10 and the second being same colour is also 1/10 <-- I do not understand why this is, the ...

**Maths**

There is exactly the same number of lollies in 10 different colours in a jar. (If one lolly is picked out , the probability of

**chemistry**

A 0.972g sample of a CaCl2*2H2O/K2C2O4*H2O solid salt mixture is dissolved in ~ 150ml of deionized water, previously adjusted to a pH that is basic. The precipitate, after having been filtered and air-dried, has a mass of 0.375 g. The limiting reactant in the salt mixture was ...

**Math**

A line parallel to 4x=3y-13? I came up with m=4/3 y-3=4/3 + 16/3 after working problem got ans y= 4/3x+25/3 confused???

**Math**

Is this correct? Ans. y=2x+20.5

**Math**

finding a equation in slope-intercept form. Through (-9, 2.5) and (-5, 4.5)

**college**

o ok thank you, so is everything else correct?

**college**

Y would you not round?

**college**

Let x be the number of miles driven on 60 gallons of gas. By setting up and solving a proportion involving x, find the value of x for the car that you have chosen. State the type of car, the mileage, and show both the set up of the proportion and the steps to solve. Include ...

**Physics**

that is rude!!

**French**

the answers are correct.

**geometry**

the legs of the isosceles triangle each measure 14in.find the length of the hypotenuse

**Finite Math**

I know but that's what the question asked. Thanks

**Finite Math**

If the life in years, of a television set is normally distributed with a mean of 46 years and a standard deviation of 4 years, what should be the guarantee period if the company wants less than 3% of the television sets to fail while under warranty?

**Finite Math**

Suppose a family has 5 children. Suppose the probability of having a girl is 1/2. find the probability that the family has exactly 3 girls and 2 boys?

**8th grade**

why do states need to be concerned about laws passed in other states

**consumer math**

Carlos Martin received a statement from his bank showing a balance of $56.75 as of March 15. His checkbook shows a balance of $87.37 as of March 20. The bank returned all the cancelled checks but two. One check was for $5.00 and the other was for $13.25. How much did Carlos ...

**physics**

if you wished to warm 100 kg of water by 15 degrees celsius for your bath, how much heat would be required? (give your answer in calories and joules)

**physics**

4.5

**calculus**

prove the following integrals: a)sin3xcos7xdx = -1/20cos(10x)+1/8cos(4x) i know i have asked this question before but i am very confused bobpursley, can you please show me the steps of proves. thanks in advanced

**calculus II university**

prove the following integrals: a)sin3xcos7xdx = -1/20cos(10x)+1/8cos(4x) b)sin8xcos3xdx = -1/22cos(11x)-1/10cos(5x)

**social studies**

What was Willson's plan for peace?

**social studies**

what was the nick name for the soilders in the world war 1

**Early Childhood Growth and Development**

the answer choices are : A.the child finds the behavior self-reinforcing. B.the stimulation of the action is satisfying. C.the stimulation provided by the action is associated with a basic drive D.the child is caught up in a simple reflex.

**math**

If a person were driving 162 kilometers per hour on a U.S. highway with a speed limit of 70 miles per hour, would he likely be speeding?

**math**

If you were buying nuts, would you rather pay $9/kg or $4/ 500g of nuts?

**20th century history**

right now my class is studyign the 1920's which was a time period where ,odern life became more popular but tradionalist tried to return life to how it use to be. what is the sourse of this culrural conflict, and what was the outcome of the cultural conflict during this ...

**3rd grade science**

Explain how you can tell that an object is in motion

**chemistry**

nf is 2

**8th grade Math**

The area of a irregular trapezoid is 38.

**8th grade Math**

How to find the area of a irregular trapezoid?

**World Cultures**

What are some crafts or games from Iceland I can share with the class for my project? (I've tried googling with no success).

**math**

Amy paints a house in 4 hours and Thomas paints the same house in 6 hours. How long will it take to paint the house together?

**math**

what a regular polygon

**Culteral Diversity**

A society that needed slaves and tenant farmers

**ap european history**

Louis XIV declared his goal was '' one king, one law, one fait''. analyze the methods the king used to achive this objective and discuss the extent to which he was successful.

**math 157**

The Political Noise Problem. The amount of background noise is important to television news reporters. One station developed the formula showing the noise level in decibels (N) as it relates to the time after the speaker stops talking in seconds (t). How many seconds after the...

**New Testament Survey**

D-Antiochus Epephanes

**chemistry**

which do you think would be more dangerous near an open flame, an ionic or covalent compound?

**Math Word Problem**

40,320

**math**

-4(2n-6)<n+6

**math**

help me write a formula that illustrates that I am in the market for a new home and there are 56 houses available and only two floor plans left using y and x

**Social Studies quick question**

Thank you Mrs. Sue!

**Social Studies quick question**

James Watt invented the steam engine in what year, and where? Are these right In the 1760s he invented the steam engine in Britain

**French**

Could you check these also thanks: Directions: Donnez des réponses personnelles. 1. Tu vas souvent au cinéma? Answer: Oui, je vais souvent au cinéma. 2. Qu'est-ce que tu aimes comme films? Answer: J'aime un film d'horreur. 3. Quel est ton ...

**French**

Could you check these thanks: Directions: Vrai ou Faux? 1. Un film doublé a des sous-titres. Answer: vrai 2. Un film en version originale est toujours en français. Answer: faux 3. Au cinéma, il y plusieures séances le week-end. Answer: Faux 4. On ...

**statistics**

what is 510,000,000 rounded to the nearest 10th or 10%

**psy**

I NEED HELP ON THE NEXT WORLDS PLEASE i need the definition also please 1. Performance goals 2. Mastery goals 3. The effect of praise 4. Expectations and self-efficacy

**PSY**

I NEED HELP ON THE NEXT WORLDS PLEASE i need the definition also please 1. Performance goals 2. Mastery goals 3. The effect of praise 4. Expectations and self-efficacy

**psy**

okay thanks

**psy**

hi, i need help on this assigments can you help me please i need to find the following definitions please help me. 1. The danger of overdiagnosis 2. The power of diagnostic labels 3. The confusion of serious mental disorders with normal problems 4.The illusion of objectivity

**Management**

What ist he difference between situational leadership and path-goal management?

**Spelling/ Language Arts**

thanks so much

**Spelling/ Language Arts**

Unscramble these words to make a sentence that makes sense the preliminary steps captain took to the organize team PLEASE HELP ME!!!!!!!!!!!

**chemistry**

double bond

**Unscramble**

I don't know? That's a hard one.

**Unscramble**

Can you unscramble this sentence? the preliminary steps captain took to the organize team Please unscramble these words to make a sentence to make scense.

**health**

thats a wierd question how about duck tape to shut the patient up.

**physicss**

A small cork with an excess charge of +5.0 μC is placed 0.12 m from another cork, which carries a charge of −3.2 μC. What is the magnitude of the electric force between the corks? The Coulomb constant is 8.98755 × 109 N · m2/C2. Answer in units of N.

**maths**

a common multiple of 3,4 and 5 less than 150

**French**

I'm sorry for number 8 I meant dépêchent

**French**

Could you check these thanks Directions: Complete each sentence with the correct form of the verb in parentheses. 1. Le matin, tout le monde veut la salle de bains. Moi, je -------- à sept heures. (se réveiller) Answer: me réveille 2. Mon frère...

**Computer**

Which of the following would be most likely to be paid from petty cash? a. coffee for the staff, b. rent for the office, c. the telephone bill

**5TH GRADE MATH**

44 TIMES N =368....FIND N

**5TH GRADE MATH**

368/44

**5TH GRADE MATH**

211 DIVIDED BY 36?

**Math**

You finish a two-mile walking race in 36.5 minutes. Write an inequality for the average speed of the walkers who finished after you did. (Average Speed = Distance/Time).

**Math**

1. |x+3|=4 x = 1, -7 2. |x-2|=6 x = 8, -4 3. |x-5|<3 x = ?? 4. |2x+3|>*17 x = ?? [>* means greater/less than OR equal to] Please check. And show how to do numbers 3 and 4. Thank you.

**Math**

You have $5 to spendon fruit for a picnic. Apples cost $0.99 per pound and bananas cost $0.49 per pound. Write an inequality to model the amount of apples and bananas you can buy.

**math**

i need a answer to a math problem

**6th grade**

a 600 n box is pushed up a ramp that is 2m high and 5 m long, the person is pushing the box at a force of 300 n,what is the efficiency of a ramp ?

**Any Help w/5th grade math**

211 DIVIDED BY 36?