# Posts by Rebecca

Total # Posts: 1,038

**chemistry**

a )what use of carbon , properties of carbon? b) is their any organic compound that synthsies like urea in lab?

**Chemistry**

Hello.Need your help guys.Burning 2g of vitamin c yields 3g and 0.82g of CO and water respectively.What is the empirical formula of vitamin c and molecular mass if the molar mass is 264g/mol?

**Physics**

Help with this please. No idea. Except for a 22.00 min. rest stop, Emily drives with a constant velocity of 89.5 km/hr north. How long does the trip take if Emily's average velocity is 77.8 km/hr north?

**Chemistry**

When you label distillation apparatus, is the condenser the same as the water jacket? Thanks

**Chemistry**

[Cu(H2O)6]2+ (aq) + 2OH- --> Cu(OH)2 (s) + 6 H2O (l) What would the full equation be for this, rather than the ionic one? I understand that OH- becomes NaOH but where does the Na go on the right hand side? Thanks

**Maths**

Does squaring a function affect the asymptotes? For example, if you square the function 1 over x + 3 does it change the asymptotes that were y = 0 and x = -3? Thank you!

**Chemistry**

Would glacial ethanoic acid have (l) or (aq) state symbol? I'm thinking liquid as it doesn't contain any water but would just like to confirm as struggling to find any equations involving it online? Thank you :)

**Chemistry**

Thank you :)

**Chemistry**

How many lone pairs does Cl- have? I can draw it using a cross and dot diagram but not sure if it would have 4, or 3 as one of the electrons has been added from somewhere to make it an ion? Thank you!

**algebra **

Problem Page The volume V of a fixed amount of a gas varies directly as the temperature T and inversely as the pressure P. Suppose that V=42 cm to the 3,when T=84 kelvin and P= 8kg over cm squared. Find the temperature when V=74 cm cubed and P= 10 kg over cm squared.

**physics**

A solid sphere of radius 35 cm is positioned at the top of an incline that makes 20 ? angle with the horizontal. This initial position of the sphere is a vertical distance 3.4 m above its position when at the bottom of the incline. The sphere is released and moves down the ...

**Chemistry**

Consider equation 3A+B=C+D. You react 4 moles of A with 2 moles of B. Which of the following is true? 1) Limiting reactant (L.R.) is one with higher molar mass 2) A is L.R. because you need 6 moles of A and have only 4 moles 3) B is L.R. because you have fewer moles of B than ...

**Social Studies **

Who's job is it to line up the votes of the members of the party that holds the most seats in a chamber? A) president pro tempore B) Speaker of the house C) Minority whip D) majority whip **** The president of the Senate also serves as the _____? A) Head of the ...

**Math (6th grade)**

Find a way to add parentheses. Use P. E. M. D. A. S. (Please excuse my dear Sind Sally) which happens to also be your name so your lucky. Remember multiply divide add subtract. Good luck.

**Physics**

Your 2000 kg car is going 40 m/s on the highway when you see a police car up ahead. You apply the maximum 10000 N of brake force to slow your car down to the speed limit of 30 m/s. How many seconds will it take you to get down to the speed limit?

**Mathematics**

Tom deposits $800 into an account that pays simple interest at a rate of 2? per year. How much interest will he be paid in the first 2 years

**Chemistry**

If you try to carry out a double displacement reaction by mixing together equal volumes of a solution that contains dissolved NaF and a solution that contains dissolved NaCl. Would you expect a reaction? Why or why not?

**Math**

The admission to a local fair is $10 for an adult and $6 for a child. Each ride costs $1.50 for and adult and $1 for a child. Write an expression that represents how much more an adult will spend.

**Calculus I**

(Six pigpen problem). A 2 × 3 array of six congruent rectangular pigpens (that all look the same from above) will be in the overall shape of a rectangle R. We may use 100 feet of fencing to form the boundaries of the pigpens. Find the dimensions for a single pigpen that ...

**Chemistry**

How many grams of H2O are required to react with excess CaC2 to produce 23.0 g of C2H2 according to the following equation? CaC2 + 2H2O -> Ca(OH)2 + C2H2 a.4.5 b.15.9 c.31.8 d.1.766 I think this equation works out by multiplying 2 moles by the molar mass of H2O. Please ...

**Chemistry**

If 3.60 moles of SiO2 and 3.60 moles of C react to form SiC accodring to the equation SiO2 + 3 C -> SiC + 2 CO how many moles of CO will be produced? a. 1.20 b.2.40 c.3.60 d.7.20 -Do I have to use SiC in any part of the equation, I am very confused and I think I just need ...

**carson high school**

solve by elimination 5r-3s=19 2r-6s=-2

**Science**

Can someone please explain how to do dot and cross diagrams. Thanks

**Math**

Melissa collected 3 kinds of autumn leaves when she was walking today- Elm,maple, and oak. She has 2 times as many maple leaves as elm leaves. Altogether, she has 32 leaves. How many of each kind does she have?

**Algebra**

At a concession stand, three hot dogs and four hamburgers cost $12.00; four hot dogs and three hamburgers cost $10.75. Find the cost of one hot dog and the cost of one hamburger.

**Physics**

A hollow sphere starts from rest and rolls down a hill without sliding. At the bottom of the hill, it has a linear velocity of 5 m/s. What was the height of the hill the sphere rolled down (in meters)?

**conclusions - check answer**

Is it correct now?

**conclusions - check answer**

C. Make sure you have developed a clear point.

**conclusions - check answer**

Which of the following is a true statement about writing introductions of rough drafts? A. Do not worry about the central point of your essay; it will happen later on as you revise your paper. (MY ANSWER) B. Pay close attention to the correct spelling of your words. C. Make ...

**conclusions**

What function do conclusions serve in essays? A. Conclusions provide the supporting details of an essay. B. Conclusions develop the main idea of an essay. C. Conclusions sum up the main idea of an essay. (MY ANSWER) D. Conclusions introduce new ideas important to the main idea...

**English Check answers**

Who: More than 600 transportation employees When: at midnight last night Where: WESTRIDGE, Ohio Why: after the Westridge City Council rejected their demand for a 10% pay increase.

**English Check answers**

I know that what I said too.

**English Check answers**

Transportation Strike Disrupts Westridge Thousands unable to get to work or school WESTRIDGE, Ohio—More than 600 transportation employees went on strike at midnight last night after the Westridge City Council rejected their demand for a 10% pay increase. The strike ...

**English**

Is this paragraph’s main idea stated or implied? The greatest gift the Sumerians gave the world was the invention of writing. The Sumerians were a wealthy people. They needed some way to keep track of what they owned. They began drawing pictures. They used a reed as a pen...

**History**

Europe

**History**

Europe?

**History Ms. Sue**

Ms. Sue

**History**

This is what my book says. Nationalism, then, was a threat to the existing political order. A united Germany, for example, would upset the balance of power set up at the Congress of Vienna in 1815. At the same time, an independent Hungarian state would mean the breakup of the ...

**History**

nineteenth century

**History**

How did nationalism threaten the existing political order of the nineteenth century?

**Algebra 2**

Thank you so much!

**Algebra 2**

I believe the answer is D but I'm not really sure

**Algebra 2**

What is the solution set to the following system? x + y = 5 and x^2 + y^2 = 25 A) (0,-5) (-5,0) B) (0,5) (-5,0) C) (0,-5) (5,0) D) (0,5) (5,0)

**math**

A credit card company charges 7% simple interest. What is the total interest on a $1,900 loan at the end of two years?

**math**

If the first term in an arithmetic sequence is 15 and the tenth term is 69. What is the fourth term in the sequence?

**math**

A ball is dropped from a height of 256 ft. With each bounce, the ball reaches a height that is half the height of the previous bounce. After which bounce will the ball rebound to a maximum height of 1 ft?

**#3 Fitness (Check answers)**

Please Check my answers.

**#3 Fitness (Check answers)**

1) The first step in the decision-making process is to brainstorm all possibilities (my answer) evaluate the result act realize there is a problem 2) Evidence that you have accomplished a goal is an example of which step in the SMART goal method? specific measurable achievable...

**Fitness (Check answers)**

Please check my answers

**Fitness (Check answers)**

6) Gang member often have weapons and are involved in violence. TRUE OR FALSE ~ (my answer is TRUE) 7) Being disruptive in class and getting angry easily could be sign of abuse. TRUE OR FALSE ~ (my answer is FALSE) 8) People with high self-esteem are prone to depression. TRUE ...

**Fitness (Check answers)**

ok, I post it already (TOP^^^^)

**Fitness (Check answers)**

6) Gang member often have weapons and are involved in violence. TRUE OR FALSE ~ (my answer is TRUE) 7) Being disruptive in class and getting angry easily could be sign of abuse. TRUE OR FALSE ~ (my answer is FALSE) 8) People with high self-esteem are prone to depression. TRUE ...

**Fitness (Check answers)**

I got a few more to check answers is that OK?

**Fitness (Check answers)**

so the #5 is TRUE

**Fitness (Check answers)**

1) Sitting in class wearing ear buds during a lecture is effective listening. TRUE OR FALSE ~ (my answer is FALSE) 2) Defense mechanisms should be used as often as possible to deal with uncomfortable emotions. TRUE OR FALSE ~ (my answer is FALSE) 3) Daily decision are often ...

**Maths!**

Suppose you draw 4 gumballs from the jar without replacement. Is it more likely that you will draw exactly 1 marble of each colour or is it more likely that you will not draw exactly 1 of each colour?

**math**

Esme is going on a holiday with 13 friends. The total cost of the holiday is £5999.00 How much does Esme have to pay?

**math**

175 centimeters and 12 centimeters

**math**

Robert is going to cut seedling support stakes from a piece of wood measuring 175 centimeters. Each support stake will be 12 centimeters in length. How many support stakes can Robert cut?

**Essay Help**

Generally, introductions begin with some brief background or contextual information that provides a focus for your paper. Well, I would recommend you to contact Supreme essay service. Those guys are real professionals in what they do.

**Maths**

Thanks Although that method works for this question, is there another method that I could use if the method you have used above takes too long if n is a bigger number?

**Maths**

Find the sum of the following series: 1024 - 512 + 256 - 128 +...+ 1 So a = 1024, r = -0.5, but I need to know what n is in order to use the formula. So I tried ar^(n-1) which is: 1024(-0.5)^n-1 = 1 but I don't know how to find n from there. Thanks in advance for any help :)

**maths lit,accounting,business,economics**

I want to do fanancial acounting

**prealgebra or algebra1**

Click: Desmos Graphing Calculator

**prealgebra or algebra1**

desmos This place will help you. Good Luck!

**4th grade math**

please help!! I have no idea how to do these I am trying to help my son.. Find two mixed numbers so that the sum is 21 1/6 and the difference is 4 3/6?

**math**

a liscense plate that has 3 numbers from 0-9 and 2 letters where each number and a letter may be used more than once. Find the Fundamental Counting Principle to find the number of outcomes in the situation

**magh**

a liscense plate that has 3 numbers from 0-9 and 2 letters where each number and a letter may be used more than once. Find the Fundamental Counting Principle to find the number of outcomes in the situation

**Chemistry Dimensional analysis**

7.32 Hours

**Social Studies**

Wow! Thank you so much!

**Social Studies**

In his book The Social Contract, Rousseau comes up with his theories on government. He believed in what he called “a state of nature” in which people are purely instinctual and harmful, so he says people made a contract with the government to give up some of their ...

**Social Studies**

Charles de Montesquieu: Expanding on the ideas of Locke in his book The Spirit of Laws, Montesquieu added the judiciary branch to Locke’s Executive and Legislative branch. ?

**Social Studies**

the people who grant that right

**Social Studies**

What does Locke say about the "social contract"? My answer: He came up with the idea that people, not god, gave the ruler the right to rule, and because of this if ever the government was not doing its job correctly then it is the people’s right to overthrow and...

**Social Studies**

John Locke: In his book Two Treatises on Government, Locke refuted the divine right of Monarchy, and established a theory which states that all men are men are born free and equal. Each person should have equal access to the natural rights of life, liberty, and property. No ...

**Math**

There are 6 periods in each working day of a school. In how many ways can one organize 5 subjects such that each subject is allowed at least one period?

**math**

How many 3 digit numbers can be formed from the digits 2,3,5,6,7 and 9 which are divisible by 5 and none of the digits is repeated?

**algebra**

x^-2y+6z^-1 add. write the answer with all exponents positive

**Math**

1)a -28-8=-36 2)a 15*-3=-45 3)a

**Math**

Area = length multiplied my width 360=area 12=width 360 divided by 12= 30ft

**algebra**

at first its 20F but now its-5F. So u would get an answer of 25 degrees. 20F-(-5F)= 25F

**math**

Thank you!

**math**

why would u multiply .2 instead of .8

**math**

how did you get that answer

**math**

a ski club planned a trip to su valley, and 38 of the members signed up. if 80% of the members did not sign up, how many members did the club have

**Math help**

thats right

**Math**

20x+10y=84 10y=84-20x y=8.4-2x, for value of y 20x=84-10y x=4.2-1/2y, for value of x

**Math**

1287 students 1170*.1= 117 117+1170=1287

**i need help plz**

2.63

**Physics**

Thank you!!!

**Physics**

Sarah walks 300 m North ,50 m East and then she walks 300 m South. What is the displacement? Thanks in advance too!!

**PHYSICS**

An object is initially moving in the positive direction of an x-axis with a speed of 2.7 m/s. If the constant acceleration of the object is -0.12 m/s2, what distance will it have traveled when it turns around?

**physics**

3. Only two forces act on an object. The magnitude of the first force is 25 N and it acts at an angle of +25° with the positive x-axis. The second force acts at angle of -73° with the positive x-axis. The acceleration of the object is parallel to the positive x-axis. ...

**Math**

ABC and def are equal both are 5:1 what's edf C is 47° triangle is the shape

**Math**

Tony hikes the woods 6.6 miles on a map 1cm=12 miles what on map representation hiking trail

**Math**

2:7 small shape is 16,22,28 feet what's what's the perimeter of big shape

**Math**

If a pole cast a 20 foot shadow and a tree that's 8 foot cast a 5ft shadow how tall is the pole also tell me how you solved it

**Physics**

Ma= 1750 kg Va= 30 m/s Vb=0 m/s Mb=2000 kg Vf=14 m/s Pf=52500 kg m/s Pa= 52500 kg m/s Pb= 0 kg m/s Ka= 787500 J Kb= 0 J

**Physics**

How do you find final kinetic energy?

**Physics**

In a car crash, Car A rear ends Car B that stopped at a red light. After the crash, Car A and Car B meld together moving at a speed of 14 m/s. Car A has a mass of 1750 kg. Car B has a mass of 2000 kg. Calculate the initial momentum of Car A. So far I have Va=? Ma= 1750 kg Vb=0...