# Posts by Lana

Total # Posts: 243

Chemistry
Calculate the ph of a solution that is 0.2M In NH3 and 0.3M in NH4Cl we find that the acid dissociation constant ka for NH3 is 5.7×10^-10

Politics
Compare Britain's and America's government. How are they similar? How are they different? Consider things like: Who is the leader of their country or their executive? Who makes the laws in their country? How do their elections work?

Math
I think it is because maybe if you put it in a circle and 6 and 17 are opposite..

ferrous sulfate was prepared by dissolution of x grams p feso4.7H20 crystals in 500 ml water. 20 ml of this solution necessities 5 ml of 0.1mol/l kmn04 for the pink color to persist. find x

Math
Idk 66?

Math
7×5

Physics
A 59.6 g box is left 17.5 cm from the centre of a merry-go-round. If the box has coefficients of friction of μs = 0.790 and μk = 0.550 with the merry-go-round, what is the maximum speed of the merry-go-round without having the box slide off of the merry-go-round?

Physics
I've been stuck on this questions for 2 days A 7.2-kg bowling ball traveling at a speed of 3.5 m/s collides with a 1.2-kg bowling pin at rest. After the collision, the pin moves with a speed of 3.0 m/s at an angle of 60° with respect to the original direction of motion...

Social studies

Social studies
which of the following is necessary to propose a new amendment to the Constitution a. approve by a popular vote held in every state b. approve by two thirds of the house and senate c. approve by three quarters of the house and senate d. approve by the legislatures in at least ...

chemistry
How many grams of FeBr 3 would be present in 150.0 mL of a 0.435 M FeBr 3 solution?

physic
A hand-driven tire pump has a piston with a 2.50 cm diameter and a maximum stroke of 30 cm. how much work do you do in one stroke if the average gauge pressure is 2.40×105 N.m – 2? Select one: a. 141 J b. 4.5×107 J c. 35.3 J d. 1.41 ×108 J

Micro Economics
In YEAR 1, the price of gadgets is \$2, while the price of the single variable input used is \$28. A profit-maximizing gadget producer uses 9 units of input to produce and sell 252 units of gadgets, earning profit of \$2*252 - \$28*9 = \$252 In YEAR 2, the price of gadgets is \$3, ...

Science
What are the main parts of the prefrontal cortex?

Science
Thx so much emma😊 4/4 100%

What is the prefix, suffix, and root for slavery? No prefix Suffix-ery or ry? Root- slave Is my suffix correct, if yes what is the definition?

Language Arts
Thanks!

Language Arts
Identify the independent clause in the following sentence: Before electric lighting was invented, people used candles to light their homes at night. A. Before electric lighting was invented B. people used C. people used candles to light their homes at night ** D. to light ...

Math - Homework Help
what is the answere two 3 and 8

Chemistry
Calculate the average kinetic energy of 1 mol of hydrogen molecules and of 1 mol of sulfur hexafluoride molecules at 25 degrees Celsius.

Chemistry
A 15.00 g chunk of lustrous silver metal is heated to 50.0 degrees C and is then placed in a coffee cup calorimeter containing 50.0 mL of water at 15.30 degrees C. After equilibrium, the water temperature is measured to be 16.56 degree C. Suggest which metal or metals could ...

Chemistry
Write a balanced chemical equation and determine the enthalpy of combustion for carbon in the diamond allotropic form. Is this the correct chemuc eq? C + O2 ----> CO2?

Chemistry
Combustion of natural gas (primarily methane) occurs in most household heaters. The heat given off in this reaction is used to raise the temperature of the air in the house. Assuming that all the energy given off in the reaction goes to heating up only the air in the house, ...

Language Arts

Math
1. If you flip a fair coin 10 times, what is the probability of a) getting all tails Is it 1/1024? b) getting all heads Is it 1/1024? c) getting at least one tails? Is it 1023/1024? 2. If you roll a pair of fair dice, what is the probability of a) getting a sum of 1 Is it 0? b...

Math
I'm running out of time and would really appreciate some help on this.

Math
Identify the sampling method. You want to determine the number of text messages students at your school send in a month. You go to the cafeteria and randomly ask students as they come out of the lunch line. A. Random B. Systematic C. Stratified D. None of these I think it'...

Chemistry- Dr.Bob!
Combustion of natural gas (primarily methane) occurs in most household heaters. The heat given off in this reaction is used to raise the temperature of the air in the house. Assuming that all the energy given off in the reaction goes to heating up only the air in the house, ...

Chemistry
Combustion of natural gas (primarily methane) occurs in most household heaters. The heat given off in this reaction is used to raise the temperature of the air in the house. Assuming that all the energy given off in the reaction goes to heating up only the air in the house, ...

language
1 from details about blossom in both the first and third haika ,what conclusion can you draw a. the poet feels exeed ingly lonely b. the poet lives in an urbansetting c. the poet injoys the gentle beuty of nature d. the poet enjoys the drama of nature at it"s most ...

algebra 1
In February, you have a balance of \$80 in your bank account. Each month you deposit \$20. Let January = 1, February = 2, and so on. Write an equation for this situation. Use the equation to find the balance in December. y = 20(x – 4); \$200 y - 80 = 20(x - 2); \$280 y = 20(...

Science
A car is traveling at 65 km/hr. The brakes are applied and the car stops in 3 seconds. What is the car's acceleration?

Math
prove sin2x+cos2x+1 tan(pi/4+x) ______________ = __________ sin2x+cos2x-1 tanx so what I did tan(x) (1+cos(2x)+sin(2x)=tan(pi/4+x) (-1+cos(2x)+sin(2x)

language arts
yes Mrs. Sue the author focuses on el Nino but the question asks about LA Nina

language arts
is it d?

language arts
Not everything about El Niño is bad. Fewer hurricanes form in the Atlantic Ocean in the summer. The weather conditions are not right for them. Florida and North Carolina often get powerful hurricanes, but El Niño helps prevent them. When El Niño ends, it ...

language arts
is it b?

language arts
El Niño is a change in how warm the ocean is. It happens when warm water from the Pacific moves eastward. No one knows why this happens. It takes place every four or five years and lasts for about a year. No two are the same. It can change the weather in many places at...

Biology
How do nucleotides and hydrogen bonds affect the structure of DNA? Maybe something like nucleotides make up DNA and hydrogen bonds hold the nitrogenous bases together?

Which group of words in the following sentence is a dependent clause? Yesterday morning, Sam slept late because there is no school on holidays. A. Yesterday morning B. Sam slept late C. because there is no school on holidays D. Sam slept late because there is no school on ...

32. What does the word ingenious mean in the following sentence? Daedalus was known for his ingenious inventions and projects. A. complicated B. expensive C. clever D. confusing is it c ?

Which word pair from “Ichiro's Tenth Birthday Party” contains antonyms? A. tried—impossible B. basketball—volleyball C. thrilled—forlorn D. brothers—uncles is it c?

What is the meaning for the homonym swallow in the following sentence? If you fly too low, the waves will swallow you. A)believe too easily B)take into stomach C)a small, swift bird D)take in is it d?

Daedalus was a Greek architect—a building designer—who was known for his ingenious inventions and projects. Daedalus designed, among other things, the Labyrinth, a maze of many paths. Famous throughout the world, the Labyrinth consisted of twisting paths from which ...

Geometry i need help urgently plz plz plz
soory idk can u help me?

i mean a

Daedalus was a Greek architect—a building designer—who was known for his ingenious inventions and projects. Daedalus designed, among other things, the Labyrinth, a maze of many paths. Famous throughout the world, the Labyrinth consisted of twisting paths from which ...

It was the summer before Ichiro started fifth grade, and he was about to turn ten. His family had just moved to a new city, so he didn’t know many other children, but his mother suggested that he host a birthday party and invite some of the friends he had made during the...

It was the summer before Ichiro started fifth grade, and he was about to turn ten. His family had just moved to a new city, so he didn’t know many other children, but his mother suggested that he host a birthday party and invite some of the friends he had made during the...

Physical Science
A 15 g bullet is fired with a velocity of 200m/s from a 6kg rifle. What is the recoil velocity of the rifle?

Algebra
the base of a cylinder is a right triangle topped by a 60 degrees sector of a circle, as shown. if the dimensions are in meters and the height of the cylinder is 8 meters, what is the volume of the cylinder?

And there is no prefix am i corrects mrs. Sue?

What is the suffix of intentionally? I thing it is ally since the root is intention am i correct?

What is the suffix, root, and prefix of the word compressions ? I think it is: Prefix- none Suffix- ions Root- compress Am i correct?

Thank you

Im not sure for the prefix of intentionally is it in or is there no prefix?

math
The teacher of a mathematics class has written up the final exam, but wants the questions to be random for each student. There are 28 students in the class, and the test has 100 questions. Each question has four possible answers. a. After reading carefully reading the scenario...

: math
Clayton has 3 quarters, 7 one-dollar bills, 9 dimes, 9 nickels, and 3 pennies. How much money does he have?

biology
EVOLUTION (fill in the blanks) Natural selection is the BLANK for evolution As a result of natural selection, organisms with more BLANK traits are more likely to BLANK, BLANK, and BLANK on the favorable traits to their offspring. These traits are passed on from generation to ...

biology (fill in the blanks)
Big picture of natural selection/ keep in mind… Natural selection doesn’t move in a BLANK BLANK Natural selection is not a BLANK process Natural selection isn't BLANK; Its all relative to the BLANK. Its from a study form. These are the ones I don't know.

Economics
ok, but how should I relate all this to my country Switzerland? I need to pick a side for my position paper- like benefits switzerland or does not benefit switzerland.

Economics
What are the conditions of China's economy in transition these past few years? How does it benefit(or harm) the country Switzerland? If it benefits Switzerland, how will Switzerland's IMF(international monetary fund)be affected or act towards it? And if it harms ...

LA
which of the following best relates to these details in "winter"? frogs burrow the mud/ snails bury themselves a. what hapens to frogs in te winter b.how do animals differ from people in the winter c.why do snails bury themselves d.how do creatures prepare for winter

Principles of Accounting 1
I need help with it please if someone could explain?

LA
going to get hate, oh well is RIGHT!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

language arts
personification-personified's answers are right!!! BLANK IS WRONG DON'T LOOK AT BLANKS ANSWERS HIS ARENT RIGHT

Math

Algebra help
A class 4 truck weighs between 14,000 and 16,000 pounds. What is the weight range in tons? b. If the weight of. Class 4 truck is increased by 2 tons, will it still be classified as a class 4 truck? Explain both thanks

A 5-pound box of spaghetti costs \$1. 1/5

English
Answers are D B C A 4/4 100%!

Language Arts
camster is right

science
I JUST TOOK THIS 1. FALSE 2. FRICTION 3. Which of the following is causing the net to change shape in the image below? THE FORCE OF THE SOCCER BALL ON THE NET 4. WILL NOT CHANGE.

social studies
- Is right!! The answers are 1. D 2. D 3. D 4. B, C, and D 5. C 6. B THANK YOU!!

Math
Write an equation for the line in slope intercept form Slope:-2 passing through (-2,8)

Find the pattern
Our trip lasted for 12 days we arrived Sunday July 1 and left on Thursday July 12th where we stayed everyday something went wrong the electricity went out the water was shut off sliding patio wouldn't close the gas oven didn't work, and it rained. Out of the 12 days it...

physics
12124

physics
how do u get dv/v = 3 dr/r ?

Geographic information system
How would you find the answer to this? Assume that two two-by-two source rasters contain the following values: Raster 1: 7 14 10 36 Raster 2: 5 2 2 5 What would be the sum of all pixel values in the raster that would be created using the following map algebra expression? ...

ENGLISH 111
I need a thesis sentence for online dating and traditional dating for a compare and contrast essay

English
Is it B? What is the main idea of the story of Morte d’Arthur by Sir Thomas Malory? King Arthur creates the ideal kingdom of Camelot. King Arthur is mortally wounded in a battle with his mortal enemy Sir Mordred. King Arthur shows himself to be an unjust ruler. Sir ...

Economics
Help! which one?! 8. All of the following are types of foreign direct investment (FDI) except _____. a foreign company merges with an existing firm in a less developed country (LDC) a foreign company takes over a firm in an LDC a foreign company enters into a partnership with ...

Home Economics
is it b?

Home Economics
7. The goal of the European Union is to _____. outdo the United States as an international trading nation coordinate tariffs among its members make a bigger trading bloc than that of the Asian nations create a single regional economy among its members

Economics
2. Which of the following is the formula for calculating the unemployment rate? (employed – unemployed) ÷ labor force × 100 (labor force – employed) ÷ labor force × 100 unemployment ÷ population × 100 (employed – labor ...

Economics
None of these seem to be right? I literally am so confused by the way they set up each one. Shouldnt it be unemployed /labor force x 100?

Economics
2. If Congress has determined that the budget will not be completed by September 30, it should _____. prepare appropriations bills to be reviewed by the President shut down the federal government pass legislation for emergency funding send a notice to the Congressional Budget ...

Science
Human

Science
common pathways for food and air are the (1), which connects to the mouth, and (2), which connects to the larynx. Epithelium in this region is (3), which provideds good protection from friction. Three bands of skeletal muscle, the (4) propel food into the (5). Entrance to the ...

chemistry
The dosage of technetium-99m for a lung scan is 20 μCi/kg of body weight.How many millicuries should be given to a 65.0-kg patient? (1mCi=1000μCi)Suppose a person absorbed 54mrads of alpha radiation. What would be the dose equivalent in mrems?

chemistry
Write a balanced nuclear equation for the positron emission of each of the following radioactive isotopes: silicon-26,mercury-188,7737Rb,9345Rh

Math
This homework question was removed due to a copyright claim submitted by the National Network of Digital Schools Management Foundation (NNDS).

English
Which of the following will help Lana with her concern?

History!
1. The beginnings of self-government in the colonies 2. A country makes a higher profit. 3. In the Ohio Valley 4. South Carolina's indigo trade was expanded. your welcome.

math
together, tom and max have 72 football cards.Tom has 2 more than 4 times as many cards as Max has. How many football cards does tom have ?

math
6,400. Since the power is positive, that shows that you will move the decimal point three spaces to the right.

chemistry
A certain weak base has a Kb of 7.80 × 10-7. What concentration of this base will produce a pH of 10.17?

chemistry
Complete the mass balance expression for a saturated solution of Ag2CO3. Note at least one blank is a numeric coefficient. (Note: Ignore any subsequent reactions of Ag .)

chemistry
balance the net ionic equation for the overall reaction. Pt | Fe2+(aq), Fe3+(aq) || I-(aq) | AgI(s) | Ag(s) a) Fe3+(aq) + Ag(s) + I-(aq) → Fe2+(aq) + AgI(s) b) Fe2+(aq) + Ag(s) + I-(aq) → Fe3+(aq) + AgI(s) c) Fe3+(aq) + AgI(s) → Fe2+(aq) + Ag(s) + I-(aq) d) ...

Math
Find the amount in each case. 8% is 56 kg.

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