hopingforachange

Any help on how to do this question would be appreciated. I've been trying to work it out but am having trouble with the algebra.

You are a quality control technician in a dairy plant. During routine testing, you discover that the batch of "half and half" cream in the holding tank has a milk fat content of 9%. If the standard for milk fat in this product is 10%, how much 40% milk fat cream must be added to bring the "half and half" cream in the tank to 10% milk fat? There is 5000kg of 9% milk fat cream currently in the tank.

Thanks in advance!

I'm getting desperate, my chemistry midterm is tomorrow and I can't even figure out the simplest questions! This is one of the questions I'm having trouble with.

When 2.00 kJ of energy is transferred as heat to nitrogen in a cylinder fitted with a piston at an external pressure of 2.00 atm, the nitrogen gas expands from 2.00 to 5.00L against this constant perssure. What is delta U (internal energy) for the process?

The answer is +1.39 kJ but I keep getting 1.78 kJ. If anyone could explain how to do the question, that would be very much appreciated.

I live fairly far away and taking a taxi would cost me half my shift money and I do not have a car that I can take. Buses don't run at that time. How do the managers expect me to get home? I"m just wondering. By the way I am an 18 year old female.

I just got offered an interview but I don't know if I want to do it anymore! Is Vector a good job for a student or not?

When sodium was added to octanol, the reaction was more slow than when sodium was added to methanol. Why is the longer one less reactive? Actually I have another question to if anyone knows. Why does sodium react better with water than with methanol? Help would be appreciated. I've been looking in my textbook and on the internet and haven't really found much.

How many grams of NH4Cl must be added o 0.700 mol of NH3 in order to prepare 1.00 L of a buffer having pH= 9.120? (Ka = 5.59 × 10⁻¹⁰)

I don't know what to do!! I've been working on it for a while and keep getting the wrong answer. If anyone knows how to do this please help me. And could you explain it please. I don't care what the answer is, I just want to know how to do the question.

I know the answer if it helps. It is 50.8g.

I'm not sure if this is right at all. The reaction is between calcium hydroxide: Ca(OH)2 and bleach: NaOCl. This is what I have:

Ca(OH)2 + 2NaOCl ------> Ca(OCl)2 + 2NaOH.

Does anyone know if this is right or not?

Thanks in advance.

I have to write the equation for the displacement of lead from a saturated solution of lead (II) chloride using zinc. This is what I think it is:

Zn + PbCl2 >>> ZnCl2 + Pb

Is that right? I'm not sure what the subscripts are though. Does anyone know what the balanced equation would be, including subscripts?

I know that ethane's formula is C2H6. So, would the formula look like this?:

2C + 3H2 >>> C2H6

I took chemistry last year and I'm taking it again in grade 12, but I'm a little foggy in some parts. I forget exactly what to do for net ionic equations. I know I have to separate the aqueous ones into their individual parts but I think I'm doing something wrong because I can't seem to get an answer that makes sense (they keep cancelling each other out leaving me with no product) How would you do this net ionic equation. I balanced it already, hopefully it's right:

3CuCl₂ (aq) + (NH₄)₃PO₄(aq) → 6NH₄Cl(aq) + Cu₃(PO₄)₂(s)

I'm doing a paper on GM foods and it's kind of difficult for me to choose a side: for or against. I think that genetic modification is beneficial because it allows more food to be grown and can benefit places that have poor growing conditions such as drought. At the same time, I think GM foods are bad because nobody is really sure the impact they will have on the environment in the long run. Any opinions or ideas?

And how many hours do you get per week on average?

There are two programs that I'm interested in taking at York University in Toronto. One is Professional Writing and the other is English and Professional Writing. I just don't really get the difference between the two. Does anyone by chance know the difference? And also to anyone who goes to York, how is it?

How did they know where to address the letter to?

Why does rapid-rise yeast cause bread to rise quicker than active dry yeast? I've been looking it up and it apparently has something to do with the fact that rapid-rise yeast has less moisture than active dry yeast, but I don't get what that does. Answers would be appreciated :)

I'm doing a project for school about beauty ideals in different cultures, and I was wondering if anyone knew some. I know in Canada and the US, being skinny is the ideal while in Africa women with curves and flesh are the picture of ideal beauty. What about other countries? Germany, Australia, Mexico? I've been trying to find some info online, but haven't found much, surprisingly.

Okay, so I know the answer because it's in the back of my textbook, but I keep getting a different answer. I just need help on how to do it.

A bacteria culture starts with 3000 bacteria and grows to a population of 12000 after 3 hours.

a) Find the doubling period (I did this and got the right answer: 1.5 hours)

b) Determine the number of bacteria after 8 hours

c) Determine the number of bacteria after 1 hour

The equation used to figure these questions out is: M=c(2)^t/D where M is the total amount, c is the initial amount, 2 is the growth factor, t is the time, and D is the doubling period.

So, I plugged in the known amounts to the equation: M=3000(2)^8/1.5 I think this is right, but I keep getting the wrong answer. The answer is 120 952 by the way. Does anyone know how to do these questions? Did you get the right answer, and if so how did you do it?

Thanks!

Personally, my favourites are Beauty and the Beast and Mulan :)

I liked it, but I have to say I was a bit disappointed in some parts. Like Ron and Hermione's kiss, I wasn't really satisfied with. And I really hated how Harry didn't fix his wand with the elder wand...it would have taken two seconds! And the whole Harry and Voldemort final duel seemed kind of anti climatic or something. And I didn't like how Voldemort's body broke into pieces...I think it would have made a better statement if his body stayed and he just fell down dead. Like, he was just a man and now he is dead. But overall it was a good movie. I loved the part with Snape's memories. I cried a few times when certain people died (don't want to spoil anything). So what did everyone else think of the movie? Did it do the book justice?

I'm 17 and I haven't had my period for at least 7 months. I know I'm not pregnant because I've never been sexually active. Is it bad not to get your period for this long? I don't think I'm underweight, I weigh 120 pounds and am 5 feet 6 inches. I haven't talked to anybody about it because I guess I'm kind of embarrassed. Will not getting a regular period affect my ability to get pregnant later on? What should I do?