# Posts by K

Total # Posts: 925

**Astronomy**

25

**algebra**

🖕🏽

**math**

For more than 4000 years the Great Pyramid of Giza stood as the tallest structure in the world. After it was completed, the pyramid stood an amazing 481 feet high. Y 9 th. grade math Semester Project: The Great Pyramid of Giza

**LA**

lol your so annoying beinging mean is not bullying if he dosnt all the time then yea

**Chem**

How many moles of NH3 must be added to 1.00 L of solution to dissolve 1.39 g of CuCO3? For CuCO3, Ksp = 2.3 × 10-10. Ignore hydrolysis of CO32-, but consider the formation of the complex ion Cu(NH3)42+.

**problem and statistics**

Positive

**math**

anne spent half of her money on CDs. After se spen half of what was left on stickers

**math**

5 square + 7 square =74.5+7=12. So these are the 2 parts.

**College Alegebra**

a 23 foot ladder is placed against a vertical wall of a building with the bottom of the ladder standing on level ground 18 feet from the base. how high up the wall does the ladder reach?

**english**

i think mr.bacon needs a medal for helping use get a 100 2 times

**math**

After 5 years, marcels account earned $ 600 in interest. If the interest rate is 0.03, how much did marcel initially invest?

**math**

you must choose the correct answer and then choose the correct solution to get the rigth result never go left you wanna go the rigth way cayse that is the rigth way to go. so always pick the correct solution so the result is positive. Hope this helped if you need more help ...

**chemistry**

Solid lead(II) iodide was prepared by reacting 65.0 mL of a solution containing 0.218 M lead(II) ions with 80.0 mL of a solution containing 0.265 M iodide ions. If the actual yield of the reaction was 3.26 g, which choice is closest to the %yield of the reaction?

**chemistry**

In the determination of the molar mass of a volatile liguid a 250ml flask was found to contain 0.250g of the vapor measured at 273c and 760 mmhg pressure. The molar mass is nearest the value

**chemistry**

A sample of co2 occupies 6.00l at 25c and 700. MmHg. What is the volume of the gas at stp

**chemistry**

When 40.2g of kc103 is heated what quantity of kc1 is produced

**Math**

k

**math**

I though you Will give me the answer.

**chem 200**

669 cal of heat is added to 5.00 g ice at –20.0 °C. What is the final temperature of the water?

**Chemistry**

If 9560 J of energy were absorbed by 500. g of ice at 0.0 °C, what would be the final temperature? Can someone walk me through setting this up?

**chemistry**

Draw one of the Lewis structure of the N2O5. In each case one oxygen bridges the nitrogens (N-O-N single bond) and 2 other oxygens are bonded to each N. How many equivalent resonance structures are there that satisfy the octet rule and where O makes at most 2 bonds?

**Physics**

You are driving down a highway at a speed of 20.0m/s when you spot a deer. You quickly slam on your brakes, trying to stop your car in front of the deer. Assume the braking force can be modeled as kinetic friction with a friction coefficient of 0.80. If the deer was 75.0m away...

**math please help**

3370.56?

**math**

David has a hose that is 27 ft long. He wants to cut it into two pieces so that the longer piece is 3 ft more than 2 times the length of the shorter piece.

**science**

EVERYONE! -A is a correct! 5/5 THANK YOU

**Math**

Which algebretic equation correct represents this sentence? 25 is three times a number decreased by 8. A. 25 = 3w - 8 ? B. 3 = 25w - 8 ? C. 3 = 25w + 8 ? D. 25 =3(w + 8) ? a little confused lol.. help? Thanks Everyone So Much

**Language Arts**

Thanks again to everyone who helped me :)

**Language Arts**

Okay thank you. So... For "I love to visit Pine Acers, our cabin in the mountains" Circled "cabin" Underlined "Pine Acres" ????

**Language Arts**

Okay so in English I'm doing "Appositives" I understand the question and I'm just confused a little. Circle the appositives. Then, underline the noun each appositive explains. 1. Sheila, my cousin works in that department store. I circled "Sheila" I...

**Science! Help**

If the first child of a couple was without dimples, a recessive trait, what is the chance that the second child will be born without dimples? A) 100% B) 25% C) 50% D) Cannot be determined from the phenotype of the child

**Science! Help**

LISTEN TO IHateSchoolButGetStrightAs HES RIGHT THANK YOU!

**U.S History Honors**

Identify the causes of Progressivism and compare it to Populism

**4th grade math**

128,955 . Round each number to the place of the underllined digit. 8 is the underlined digit

**chemistry 101**

A patient receives 2700mL of an IV solution containing 4g g of glucose per 100 mL .How much energy, in kilojoules, does the patient obtain from glucose, a carbohydrate? please help I keep getting the wrong answer

**chem**

A patient receives 2700mL of an IV solution containing 4g g of glucose per 100 mL .How much energy, in kilojoules, does the patient obtain from glucose, a carbohydrate?How much energy, in kilocalories, does the patient obtain from glucose?

**Chemistry**

Just to clarify- if I would have to mix 100 mL of 36 M solution with 600 mL of distilled water to make a 6 M solution (700 total mL) is that correct, or do I have that mixed up? Sorry for the trouble :(

**Chemistry**

Question: how do you dilute something with a huge concentration to the same thing with a smaller concentration? For example: How do you dilute a 36 M solution of NaOH to a 6 M solution of NaOH?

**chemistry**

Suppose you have two 100-mL graduated cylinders. In each cylinder there is 40.0mL of water. You also have two cubes: one is lead(11.3g/ml), and the other is aluminum(2.70g/ml) Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of the ...

**chem**

but doesn't the lead and aluminum have anything to do with the calculation

**chem**

Suppose you have two 100-mL graduated cylinders. In each cylinder there is 40.0mL of water. You also have two cubes: one is lead, and the other is aluminum. Each cube measures 2.0cm on each side. After you carefully lower each cube into the water of its own cylinder, what will...

**engineering maths**

Show that the following curves are intersect eachother orthoganally.r-(1+coso) r-(1-coso)

**World Geography**

A. was the correct answer.

**World Geography**

19.With respect to human rights issues in Southeast Asia, which statement is most accurate? A.Both Cambodia and Vietnam carried out ethnic eradication programs against hill people. B.Chinese merchants living in Cambodia and elsewhere have carried out vendettas against hill ...

**chemistry**

A block of copper of unknown mass has an initial temperature of 66.7 ∘ C . The copper is immersed in a beaker containing 95.5g of water at 20.6 ∘ C . When the two substances reach thermal equilibrium, the final temperature is 26.0 ∘ C .What is the mass of the...

**math**

At Dora's donut shop, dora makes 15 different varieties of donuts. Seven of these varieties are filled with jelly or cream. Officer sweetooth was sent to dora's shop to choose a dozen donuts, all different, with six filled and six unfilled. How many different ...

**Language Arts /The Giver**

I just took the quiz I got a 100

**Language Arts /The Giver**

your answers are correct

**math**

Indicate whether the following statement is true or false. If a figure can be translated, then it will tessellate. I say false am I right?

**physics**

an electron in the second energy level absorbs a photon of energy 6 ev what's the speed of the ejected electron? I have tried to manipulate and use the kinetic energy equation, c= lamba x f, and many other ways, but I don't know why can't get the answer, which is v...

**math**

Use integers from-3 to 3 to graph the equation. y=1/3|x|-2. Please help me how it would be on a graph

**math**

I forgot to put use the integers -3 to 3 to graph the equation.

**math**

What would a graph look like with the equation y=-2(x)2+3.the two next to the x means to the second power. Please help me

**math**

Your description helped me understand thank you. It is D

**math**

Is it A

**math**

The vertices of ABC are A(2,-5), B(-3,5), and C(3,-3).the triangle is reflected over the x-axis.use arrow notations to describe the original triangle and its reelection. A) A(2,-5),B(-3,5),C(3,-3)->(2,-5),(-3,5),(3,-3) B) A(2,-5),B(-3,5),C(3,-3)->(-2,5),(3,-5),(-3,3) C) ...

**math**

Can't you just tell me if its a,b,c, or d? I'm stressed out please

**math**

The point C(3,-1) is translated to the left 4 units and up 1 unit.write a rule to describe the translation.what are the coordinates of the image point? A) (x,y)->(x+4,y+1);(7,-2) B) (x,y)->(x-4,y-1);(-1,0) C) (x,y)->(x+4,y-1);(7,0) D) (x,y)->(x-4,y+1);(-1,0) Is it d

**math**

what is the correct description for the translation of A to A? A(10,3)->A(1,6) a) right 9; up 3 b) left 9; down 3 c) right 9; down 3 d) left 9; up 3 Is it C

**math**

y=1/3|x|-2 use integer values of x from-3 to 3 to graph the equation. Please help me graph this

**math**

y= -2x+3.the x has a 2 above it

**math**

I'm only in seventh grade and I don't understand any of this.what does a parabola look like

**math**

y=2x^+3 use integer values of x from -3 to 3 to graph the equation. Someone please tell me how to graph this

**Alg**

order your answers from smallest to largest x, then from smallest to largest y. If there is no solution, enter NO Solution 2x^2+3y^2=48 x^2-y^2=4 (x,y)= ( , ) (, ) (x,y)= ( , ) (, ) (x,y)= ( , ) (, ) (x,y)= ( , ) (, )

**statistics**

Data were collected on 100 students regarding their class and major. The data are summarized in the following contingency table. What is the probability of randomly selecting a sophomore or an undeclared student?

**Alg**

A car with good tread can stop in less distance than a car with poor tread. A model for the stopping distance d, in feet, of a car with good tread on dry cement is d = 0.04v2 + 0.5v, where v is the speed of the car in miles per hour. If the driver must be able to stop within ...

**graphing**

(0,-2)is the vertex- what is the domain and range??? State the domain and range of the function. (Enter your answers using interval notation.)

**Criminal law**

1. The primary purpose of psychological profiling is to provide: A.the identity of an offender involved in a violent crime such as murder or sex crime. B. absolute information about an offender’s emotional and personality character traits and to immediately direct ...

**Social Studies**

what

**Global Studies (Please help)**

I don't like cheating

**Math**

Reiny, 16 times 3 is 48. You are wrong.

**Intermediate algebra**

Can you show the work of how to work this word problem ? A local electronics store will sell 7 ax adapters and 2 rechargeable flashlights for $86 or 3 ac adapters and 4 rechargeable flashlights for $84. What is the price of a single ax adapter and a single rechargeable ...

**Chem; States of Matter**

Thanks! My book suggests that: Steam = [[(175)(4.18)(100)] /1000] + 175(1mol/18.015)(-40.7/1mol) Where -40.7 is the Hvap ... I think. So I'm still super lost with that one weird extra step! Everything else is the same!

**Chem; States of Matter**

To an insulated container with 100.0 g H2O (l) at 20.0 degrees C, 175 g steam at 100.0 degrees C and 1.65 kg of ice at 0.0 degrees C are added. a) What mass of ice remains unmelted after equilibrium is reached? b) what additional mass of steam should be introduced into the ...

**someones GOTTA help me with this science...!!!**

I'm in connexus and got a 60% from following u guys! The answers are 1.c 2.d 3.c 4.d 5.a

**Chemistry**

For example, when a question asks about two equivalents of bromine, does that mean Br2 OR 2Br2? Thanks

**Chemistry**

Thanks :) so just to be clear, does it matter what the Mg is reacting with, or is it always going to have the coating of the MgO on it?

**Chemistry**

When a student doesn't polish a sample of Mg ribbon before massing it, what happens when calculating the molar volume? Is it that the Mg ribbon doesn't completely react therefore less volumes of gas are produced?

**Chemistry**

How would you define pressure in the unit of thermodynamics? Is it just a force basically?

**physics**

I think it would just be Fg x m, so 70kg times 9.81 m/s^2, and then multiply all of that by 2.9m, and the negative is just saying what direction the man is falling, meaning downwards

**BUSINESS**

Do you believe economic principles like competition apply in both private and public organizations? Why?

**Science**

suppose that a population of skunks lives on an isolated island is 500 skunks are present today and the birth rate is 65 per week and the death is 47 per week how many skunks to you predict will be on the island 105 days from now and what would a graph population versus time ...

**chemistry**

ok, so i did a lab called: measurements using electrochemical cels and electroplating, and one of the post lab questions asks,if the student fails to dry the electrode, in this case (Cu+2), what effect does it have on the calculated value of Faraday? and what affect does it ...

**Chemistry**

how can you tell if something with oxidize or reduce some other thing, based on the standard reduction potential table?

**Chemistry**

how can you tell if something with oxidize or reduce some other thing, based on the standard reduction potential table?

**Chemistry(DrBob222)**

thanks for your help :)

**Chemistry(DrBob222)**

the procedure is no more precise really, I understand the lab, if i can ask a different question then, when delta g is negative and becoming less negative (or more positive), why is this happening over a decrease in temperature (increase in volume)

**Chemistry(DrBob222)**

yes I understand, and this helps a lot, but what I don't understand, is why in one trial the delta s was higher than in another trial, could you explain why that happened?

**Chemistry(DrBob222)**

it went back up to 116.4*

**Chemistry(DrBob222)**

So, i did this lab, a solubility and thermodynamics lab of KNO3, and in it we had to determine the delta h delta g and delta s, the question i have is what is the relationship of the signs delta h, delta s, and delta g, to the dissociation of the salt and the temperature ...

**Chemistry(DrBob222)**

for a thermodynamics lab, I have to graph the ln K vs. 1/T, so does the ln K go on the y-axis and the 1/T go on the x-axis?

**AP Chemistry**

for a thermodynamics lab, I have to graph the ln K vs. 1/T, so does the ln K go on the y-axis and the 1/T go on the x-axis?

**Physics help please**

A crate is dragged 5.0 along a rough floor with a constant velocity by a worker applying a force of 125N to a rope at an angle of 30degrees to the horizontal. Calculate the work done by the tension in the rope, the force of friction, and the net force. I know the work don on ...

**Chemistry (DrBob222)**

Is the relationship between delta G and Temperature inverse or direct?

**AP US History**

When the south Carolina seceded in 1860 they seceded because Abe Lincoln was elected president. But, is the secession of South Carolina also an example of state's rights? if so, how?

**physics**

A 70.5kg football player is gliding across very smooth ice at 2.05m/s . He throws a 0.470kg football straight forward. What is the player's speed afterward if the ball is thrown at 14.5m/s relative to the ground? What is the player's speed afterward if the ball is ...

**chemistry (Dr.Bob222)**

Ok, so when doing a serial dilution, would you day that the first well with no ppt represents a perfectly saturated solution, why or why not?

**chemistry (Dr.Bob222)**

Do serial dilutions start out as saturated solutions?, Meaning when it starts out ppt forms, but there is a point where ppt stops forming, so when the ppt stops forming does that mean it is representing a saturated solution, and that when the ppt is not forming the solution ...

**Physics**

A fire truck attaches two fire hoses to a hydrant to fight a fire. Each hose has a diameter of 20 cm. The underground water pipe going to the hydrant has a diameter of 100 cm. In the underground pipe, the water has a speed of 2.0 m/s.

**Please help!- Physics**

i don't get it