# Posts by LILY

Total # Posts: 1,561

**algebra 1**

Simplify:2 square root of 4 + 2 square root of 8? 4+4 square root of 2?

**algebra 1**

Thank you!

**algebra 1**

What is the area of a square with the dimension of 1+square root of 2? I'm thinking 3+2*square root of 2? *=times

**chemistry (acid-ionization constant)**

A 0.942 M sample of carbonic acid, H2CO3, has a measured hydronium ion concentration of 6.36 ´ 10–4 M. Calculate the acid-ionization constant of carbonic acid. The equilibrium equation is: H2CO3(aq) + H2O(l) <--><--> H3O+(aq) + HCO-3(aq)

**chemistry**

what is an ICE chart?

**chemistry**

A 0.942 M sample of carbonic acid, H2CO3, has a measured hydronium ion concentration of 6.36 ´ 10–4 M. Calculate the acid-ionization constant of carbonic acid. The equilibrium equation is: H2CO3(aq) + H2O(l) <--><--> H3O+(aq) + HCO-3(aq)

**chemistry**

For a system in which DHvap > TDSvap, what state is favored?

**chemistry**

Determine the entropy change for the following displacement reaction. Cl2(g) + PbBr2(aq) → PbCl2(aq) + Br2(l). DS: (J/K mol) Cl2(g) 223.066; PbBr2(aq) 182.7; PbCl2(aq) 131.3; Br2(l) 152.231

**algebra 1**

Thanks! My calculator doesn't have that button, so the Google calculator will come in handy!

**algebra 1**

A=1020(1-0.195)exponent of 20 How do you figure out exponents that are high numbers?

**chem**

how did you get the 5.55 x 10^-3 ?

**algebra 1**

Thank you! You were a lot of help!

**algebra 1**

Use elimination to solve the the system of equations given by 10x-4y=-20 and 10x-5y=35. I can't figure this one out. Whenever I check my work, it is incorrect.

**algebra 1**

Thank you!

**algebra 1**

What point is a solution to the system of inequalities y(inequality arrow pointing right)4x and y(inequality arrow pointing right)-2x-3? -1/2,-2?

**English**

Thanks!

**English**

Hi, could you please tell me if these 2 sentences are correc. Each of the twins has a doll in their room. 2. The couple have gone on vacation. Also, when you have neither....nor, you use has don't you? Example Neither Helen nor Sarah has finished their homework.

**Algebra**

Salisbury High School decided to take their students on a field trip to a theme park. A total of 150 people went on the trip. Adults pay $45.00 for a ticket and students pay $28.50 for a ticket. How many students and how many adults went to the park if they paid a total of $4770

**Economics**

With the new UK emregncy budget what are the advanatages and disadvantages of decreasing the corporation tax?

**biology**

Thank you!

**biology**

When genetically engineering an organism, a plasmid a. is the main chromosome of the bacteria that is cloned. b. is cut with a restriction enzyme to accept the gene of interest. c. helps screen for cells that did not take up the gene of interest. d. combines with the gene of ...

**grammar**

Thank you soooo much for the help!! (0:

**grammar**

Can someone please check the errors I have noted and let me know if they see more? I am supposed to find 20 errors but can only find 15!! Please help. The correction is in parentheses. Why are great numbers of students choosing to pursue their college degrees using their home ...

**spanish**

Thank you so much! ¡Gracias!

**spanish**

(2 people talking to each other) "?Comen tus amigos contigo todos los dias?" "Si,_____ comen conmigo." a. nunca b. por la noche c. siempre d. manana C? There is a line above A in dias and a squiggly line above the first N in manana. Sorry about the ...

**spanish**

Thanks!

**spanish**

El profesor _____,y el estudiante _____. a. termina las clase/empieza la clase b. ensena/estudia c. ensenar mucho/estudiar d. empieza la clase/terminar I think B? There are squiggly things over the N's in ensena and ensenar.

**geometry**

Right triangle ABC is similar to triangle XYZ, because angle B is congruent to angle Y. If side AB equals 12 inches, side BC equals 27 inches, and side YZ equals 9 inches, then what is the length of side XY?

**chemistry**

How many grams of glacial acetic acid should be used to make 250 mL of 2.00 M acetic acid? Show all your work.

**chemistry**

How many grams of glacial acetic acid should be used to make 250 mL of 2.00 M acetic acid? Show all your work.

**Chemistry -**

create a balanced chemical equation and state the type of reaction. Zinc metal reacts with aqueous silver nitrate to produce solid silver and an aqueous solution of zinc nitrate. please go step by step, would be very helpful.

**spanish, again**

Thanks! I'll try that!

**spanish, again**

Thank you! I have a Windows PC. I would really appreciate the chart.

**spanish, again**

(upside down question mark) Que ____ hacer tu y yo para su cumpleanos? a.puedo b.puedes c.podemos d.pueden Is it C?

**spanish**

Thank you!

**spanish**

(upside down question mark)De quien es _____ sueter? a. este b. esta c. su d. esos A?

**chemistry**

change 120 ml to l .120 L then divide M by L to get moles 2.80 M/.120 L then take this and multiply it by the atomic weight or mass of NO

**Chemistry**

The most abundant isotope of the element nobellum has a half-life of 58 minutes. After 174 minutes the sample has a mass of .300 mg. What was the orignal mass of the sample? A. 1.20 mg B. 4.80 mg C. .600mg D. 2.40 mg

**chemistry**

Ba-140 has a half life of 13.0 days. What fraction of a sample will remain after 39 days?

**Chemistry**

The half-life of xe-133 is 126 hours. Starting with 250 mg, after 500 hours around how many mg remain?

**6th Grade Math**

yellow

**social studies**

sailor

**science**

what

**algebra**

how would you solve the follwing equation? (2c/c-4)-2=(4/c+5)

**math**

628. if there is more than 6 ones, its 628. if it says more than 6 ones, inclusive than it could be both.

**Geometry**

i believe it would be 56.52 (not 100% positive though) because if the radius is 6, then the circumference would be 3.14(6^2)= 3.14(36) which is 113.04 then you would put that over 360 and set up a proportion: 113.04/360 = x/180 (simplified to 20347.2/360) which gives you a ...

**math**

i think it would be 8 to 1 because 4000 -> 500 so 400->50 and 40->5 which would be 8->1

**algebra**

each week, mandy's algebra teacher gives a 10 point math quiz. after 5 weeks, mandy has earned a total of 36 points for an average of 7.2 points per quiz. she would like to raise her average to 9 points. on how many quizzes must she score 10 points in order to reach her goal?

**Social Studies**

india and china

**pyschology 1**

How would you use classical conditioning, operant conditioning, and observational learning to improve your academic performance? Give one example for each type of learning.

**MATH/OPTICS**

given di=145, do=38,hi=-97 formula: hi/ho=-di/do how do i rearrange this?? i do not want the answer. need help rearranging equation please help!!

**English**

It's A, because demonstrative pronouns = this, that, these, those.

**biology**

In mitosis, what is the size of a daughter cell relative to the size of the parent cell? If an onion cell has 10 chromosomes, how many double chromosomes does an onion cell have at the start of metaphase? Thanks!

**Chemistry**

Which of these is true about the following reaction? NaOH + HCl ¡æ NaCl + H2O A. NaOH is the proton acceptor. B. HCl acts as the Br©ªnsted-Lowry acid. C. NaOH and HCl are the products. D. This is an example of a neutralization reaction. E. The products ...

**Chemistry**

How much heat is given off when 24.0 g of methane is burned in air? The equation for the reaction is: CH4 + 2O2 => CO2 + 2H2O + 890 kJ What equation or formula should I use to solve this? Thanks!

**SCIENCE: GR.10 OPTICS CONVEX MIRRORS**

A convex security mirror has a focal length of -0.25m. A person with a height of 1.5m is 4m from the mirror. calculate the image distance and image height. AND An object 0.4m tall is placed 2.5m in front of a convex mirror that has a focal length of -90cm. Calculate image ...

**science optics**

A cosmetic mirror is 50cm from your face and the magnified image of your face is upright. You are told that the focal length of the mirror is 45cm. Explain why this focal length is not possible. I understand that the image would be magnified and upright...that's about it

**Math**

What is the product of the sum of 1.3 and 0.9 and the difference of 1.2 and 0.8

**p.e theory**

explain how stregths and weaknessess can affect your health and efficency in sport?

**Physics**

Thank you.

**Physics**

A rectangular piece of gold is 3.1 cm long and 3 cm wide. Resistivity of gold is 2.4*10^-8. How deep is the piece when it displays a resistance of R = 1.65 μω for a current that flows along the depth-direction? I used R=(p*l)/A and solved for l. I got the answer ...

**MATH**

how do you change metric units

**Math**

The formula for Simple Interest is Interest= Principle x Rate x Time. You fill in the formula- ?= 7540 x 4.5% x 10. Then, you turn the rate into a fraction- 0.045. Fill in the formula again, 7540 x 0.045 x 10, you multiply. 7540 x 0.045 x 10 = 3393. The interest after ten ...

**Science**

If my project is about a lie detecting project waht would be my independent, dependent, and controlled variable?

**biology**

Which objective (4x, 10x, or 40x) has the shortest depth of focus? Thanks for the help!!

**5th grade**

look in the dictionary

**viking age**

who are the vikings and what are their daily life, thank you

**music**

Character

**Math**

what is the total cost of the rechargeable batteries and battery chager?

**English - Mari Djata**

i think C

**Chemistry**

Approximately how many grams of NaNo3 will dissolve in 100g of water at 20 degrees Celsius?

**algebra**

Write a word phrase for 5p

**math**

Thank you! :)

**math**

So it would be half of his piece?

**math**

I'm doing a problem, and it says "Robert has a piece of twine that is 3/4 yard long. He needs a piece of twine that is 2/3 of this length. How long of a piece of twine does robert need?" Help?

**math**

How do you write repeating decimals as fractions? There's directions in my book,but I don't understand it? For example, how would you write as a fraction 0.81 with the 81 repeating?

**Physics**

To suck water up a straw to a maximum height of 187 mm, what minimum gauge pressure must be produced in the lungs? Note that in order to be able to suck up water, the pressure in the lungs must be lower than the pressure outside by the exact amount of pressure created by the ...

**crt 205**

I need to identify two arguments and define the premises and conclusion. I have to tell weather it is deductivly valid or inductivlely strong or in valid or weak and why. In the appendix 1 article Controlling Irrational Fears After 9/11. Can you help with this.

**math**

It becomes 17? But usually with problems like these aren't you supposed to subtract since it's an addition problem?

**math**

So the problem is 9 = w + (-8) I know the answer is 17. But I don't know how I solve it/show work.

**Writing**

Ooops! I'll try to find a word to substitute that.

**Writing**

Is "confidentialationalize" spelled like that?

**URGENT Grammar**

I think it is mental. Am I correct?

**URGENT Grammar**

Are you absolutely sure? You might be correct.

**URGENT Grammar**

In the sentence "She approved the apposed marriage" is approved a: (a)linking verb (b)action verb (mental) (c)action verb (physical)

**Grammar**

Then it must be an action verb mental.Right?

**Algebra**

For each function, find three ordered pairs that lie on the graph of the function. -6=3x+2y

**math**

Solved both!

**math**

I figured out the first one. Still trying number 2.

**math**

1.Explain why there is no number that can replace N to make the equation |n| = -1 true. 2. List the integers that can replace N to make the statement -|8| < n < -|-5| true. I don't really get what am I supposed to do?

**to kill a mockingbird**

I'm reviewing for my test about the novel "To Kill a Mockingbird". There's this question I can't answer: 1. What are the generalizations (like stereotyping) made about black people? Who makes them? And how are black people affected by it? The same ...

**math**

In my book, it says to use a number line to find the sum of the equations. Should I draw a numberline on my paper, or just write down the answer on the paper?

**physics**

Work= force * distance Multiply 12.0 m and 25 N and that's your answer

**math**

15 ***********--------- *********/| | ********/ | | 20 *****25/ | | ******/ | | *****/____|________| *****15*******15

**math**

Ahh. The shape didn't show. Basically, it's a rectangle with like a triangle on the side of it. 15 on the top, 25 on the side with the triangle point, 20 on the right side, 15 on the bottom, where the triangle is. and 15 on the bottom of the rectangle

**math**

So, I need to find the area of this shape. It's an irregular shape, and I don't know how to figure it out. The shape looks like, 15 -------- /| | 25 / | | 20 / | | / | | /____|______| 15 15 I was told the answer was 450. Though I don't know how to figure 450 out?

**math**

i still don't get what a prime number is?

**math**

The formula for the area A of the triangle is A=1/2BH, where B is the length of the base, and H is the height. Solve the equation for B. I don't know how I'm supposed to be able to figure this out?

**math**

What are algebraic models? There's a problem and it says to use an algebraic models to answer the questions. I don't know what those are?