# Kira

Popular questions and responses by Kira-
## CHEMISTRY

A 1.000 L vessel is filled with 2.000 moles of N2, 1.000 mole of H2, and 2.000 moles of NH3. When the reaction N2(g) + 3 H2(g) ⇀↽ 2 NH3(g) comes to equilibrium, it is observed that the concentration of H2 is 2.53 moles/L. What is the numerical value of

*asked on January 11, 2015* -
## history

Which accurately describes historical events of the Han Dynasty? during the han dynasty, emperor qin shi huang began building the great wall of china during the han dynasty, historian believe the l ching, a fortune telling guide, was written during the

*asked on September 28, 2017* -
## history

Which most accurately reflects the development of agriculture in early African civilizations? the walls of the jabrin castle were erected in oman to protect valuable crops the kingdom of Ghana exchanged surplus crops and gold for textiles and salt brought

*asked on September 29, 2017* -
## tourism and hospitality

Which most accurately demonstrates the development of civilization and culture in the Neolithic era? people progressed in metal work, now making steel tools instead of bronze tools people followed a nomadic lifestyle dependent on the migration patterns of

*asked on September 30, 2017* -
## history

Which most accurately describes ancient Phoenicia’s agricultural practices? Phoenicia did not have much land for farming, but did grow fruits, wheat, olives, and grapes for wine Phoenicia had plenty of fertile land, where plums, apples, oranges, and

*asked on September 30, 2017* -
## history

How were the cultural customs of Oceania passed down from generation to generation? A) Oceania cultures used hieroglyphics and pictographs on seashells. B) Oceania cultures kept written records using silk. C) Oceania cultures used an oral tradition for

*asked on September 28, 2017* -
## history

What best describes tactics used by the Arab Empire when it captured a region? A) The conquerors used Visigoth mercenaries to maintain order. B) The conquerors forced the populace to convert Islam. C) The conquerors used the region's existing leaders as

*asked on October 2, 2017* -
## history

Which best defines settlement as it pertains to the history of civilization? a location where two parties resolved disputes or conflict over land ownership a location where groups ceased roaming and built permanent dwellings location where natural

*asked on September 29, 2017* -
## algebra

Medical research indicates that the risk of having a car accident increases exponentially as the concentration of alcohol in the blood increases. The risk is modeled by R=6e^12.77x Where x is the blood alcohol concentration and R, given as a percent, is

*asked on April 12, 2014* -
## history

Which best describes a democracy? form of government in which political power is held by a single ruler form of government in which political power is held by the people government based on appointing officials according to merit and academic

*asked on September 29, 2017* -
## Math

There are two numbers twice as far from 14 as they are from 20 what are the numbers?

*asked on September 14, 2018* -
## history

What was the capital city of the Ottoman Empire?

*asked on October 3, 2017* -
## history

What was the Roman Empire’s system of government prior to Julius Caesar that heavily influenced Western democracies? Peasants, including women and slaves, were ruled by kings, barons, and lords. Roman government consisted of a king, crown prince, and an

*asked on September 29, 2017* -
## history

Which major culture of the ancient world is responsible for producing literature such as the Iliad and the Odyssey? I think its greek

*asked on September 29, 2017* -
## history

In 332 BC, which military leader defeated the Persians and annexed Egypt to be part of his Macedonian Greek empire? alexander the great Julius Caesar mark antony king tutankhamum is it a

*asked on September 29, 2017* -
## LA Help!

Both Ernesto from barrio boy and the boy in "A Day's Wait" interact with adults. Ernesto interacts with Miss Ryan, while the sick boy interacts with his father. Compare and contrast how the boys interact with the adults. Focus on how the boys think of the

*asked on December 6, 2016* -
## math

Admission tickets to the local Nutcracker production cost $2.50 for children and $3.50 for adults. The price for 8 tickets was $23.00. How many adult and children tickets were purchased?

*asked on December 6, 2014* -
## chemistry

Poly(methyl methacrylate) (PMMA), more commonly known as acrylic glass.Draw the monomer, given that this polymer forms by addition polymerization. Include all H atoms.

*asked on November 22, 2014* -
## GA History

Which Native American groups are living in the Colony of Georgia, according to the map? loc.gov/resource/g3300.ar000500/ I honestly can't tell and my glasses aren't doing anything to help. Please help me!

*asked on November 9, 2018* -
## Egg-speriment help

I go to conventions academy for seventh grade. A week ago we were assigned to the egg-experiment where "One of the cell structures you will be learning about is the cell membrane. In the Chapter Project, you will model how a cell membrane works to let

*asked on November 2, 2017* -
## history

Which most accurately describes how religion impacted the Mayan culture? mayan priests performed human sacrifices to appease the angry gods the maya shared spiritual beliefs and cultural characteristics with their rivals, the Aztecs the maya believed in

*asked on September 30, 2017* -
## history

Which accurately describes the Roman Empire’s influence on the Celts throughout northern Europe? there is no evidence that the celts and the romans made contact the celts resisted roman rule by successfully defeating Julius ceasar advancing armies in

*asked on September 30, 2017* -
## CHEM

At equilibrium at 1.0 L vessel contains 17.00 mol of H2, 20.00 mol of CO2, 13.00 mol of H2O, and 6.000 mol of CO at 427◦C. CO2(g) + H2(g) ⇀↽ CO(g) + H2O(g) What is the value of K at this temperature for the reaction?

*asked on January 11, 2015* -
## Science

A 60 kilogram tourist tries horseback riding in tagaytay.The horse has a mass of 500 kilogram.He moves around a circular path with a radius of 10 meter at a rate of 5 meter per second.Compute the centripetal force.

*asked on July 23, 2019* -
## Algebra

Given f(x) = 3/4x + 12, find the value of x when f(x) = x. A) 3 B) 48 C) 4/3 D) 4/7

*asked on October 12, 2018* -
## history

Which options accurately describe the impact of the Roman Empire on later civilizations? (Select all that apply.) the roman empire invented gunpowder used by western nations in future wars the roman empire bureaucratic government was adopted by European

*asked on October 2, 2017* -
## history

Which accurately describes battle achievements of Alexander the Great? He defeated the Roman Empire in Egypt, founded the city of Cairo, and ordered the preservation of King Tutankhamun artifacts. He defeated the Persian Empire in Egypt and founded the

*asked on September 29, 2017* -
## psychology

which of the followinfg is not a current trend regarding marriage? A. an increase in the average age at first marriage. B. an increase in the percentage of couples who voluntarily remain childless. C. an increase in the number of single adults. D. a

*asked on April 27, 2015* -
## chemistry

A buffer with a pH of 3.93 contains 0.17 M of sodium benzoate and 0.32 M of benzoic acid. What is the concentration of [H ] in the solution after the addition of 0.054 mol of HCl to a final volume of 1.5 L?

*asked on November 4, 2014* -
## physics

Calculate the number of H2O molecules in a human body of mass 50.6 kg. Assume that, on average, water makes up 62% of the mass of a human body. (Use 1.0 u for the atomic mass of hydrogen, and 16.0 u for the atomic mass of oxygen.)

*asked on April 12, 2013* -
## science

why are some foods spicyer than others?

*asked on November 12, 2012* -
## math

The bumper car ride at the state fair has 3 red cars, 4 green cars, and 2 blue cars. Joe is first in line for the ride and is assigned a car at random. Bill in next in line and is randomly assigned a car. What is the probability that both joe and bill will

*asked on May 24, 2010* -
## MATH

X= 92]96]100]104]108 Y=23]24]25]26]27 WHAT IS THE VALUE OF Y WHEN X IS 68?? IF Y=X-19, WHAT IS THE VALUE OF X WHEN Y= 34

*asked on February 20, 2008* -
## Chemistry

1.) How many grams of 2-propanol are expected from the complete reaction of 672 g of propene? 2.)How many moles of propane are expected from the complete reaction of 82.8 g of propene? 3.)How many grams of propane are expected from the complete reaction of

*asked on April 5, 2007* -
## Mathematics

Regular triangular pyramid has 6 cm long base edge and slant height k=9 cm. Find the lateral area of the pyramid. and Regular triangular pyramid has the slant height k=12 cm and lateral area AL = 198 cm2. Find the length of the base edge.

*asked on May 24, 2020* -
## science

Heat is so closely related to _____, the same units are used to measure both. work power temperature** momentum i think temperature

*asked on October 15, 2019* -
## Algebra 1

A geometric sequence is defined by the general term t^n = 75(5^n), where n ∈N and n ≥ 1. What is the recursive formula of the sequence? A) t^1 = 75, t^n = 5t^n - 1, where n ∈N and n > 1 B) t^1 = 75, t^n = 75t^n - 1, where n ∈N and n > 1 C) t^1 =

*asked on October 23, 2018* -
## math

A giant football field is made for the floor of the gym. The length of the gym is 90 feet. Using this same scale, determine the width of the paper football field. How do I solve this if it says that the dimensions are 160 ft? by 360 ft. and the end zone is

*asked on November 14, 2017* -
## history

What were some differences between the Byzantine and Arab Empires? (Select all that apply.) the byzantine empire forbade trade with Visigoth and Frankish nations, whereas the arab empire encouraged seagoing trade. the byzantine empire had great regard for

*asked on October 3, 2017* -
## history

What tradition of the Ottoman Empire gave the sultan absolute power yet a duty to ensure fair justice and protection for the empire’s citizens? is it adalet

*asked on October 3, 2017* -
## history

Which most accurately describes the role of Abraham in the Hebrew scriptures? he led his people west from Mesopotamia to canaan, in present day isreal he fought and slew the philistine giant known as goliath he led his people against philistine. after he

*asked on September 30, 2017* -
## tourism and hospitality

What country do tourists originate from?

*asked on September 30, 2017* -
## history

how did the Agricultural Revolution impact religion and culture?

*asked on September 30, 2017* -
## tourism and hospitality

what is the economic multiplier for the UK?

*asked on September 29, 2017* -
## history

Which most accurately describes the structure of the Roman government when it was a republic? A: The Roman government was a dictatorship in which an emperor ruled by divine right. B: The Roman government consisted of two consuls and the senate. C: The

*asked on September 29, 2017* -
## history

Which best describes the Assyrian Empire’s impact on the Mesopotamia region? The Assyrians were the last known hunter-gatherer group in Mesopotamia. The Assyrians attacked and killed thousands of Muslims in Egypt, Iran, and Syria. The Assyrians attacked

*asked on September 29, 2017* -
## tourism and hospitality

What percentage of the england's income is generated from tourism?

*asked on September 29, 2017* -
## tourism and hospitality

Is the economic impact in England positive or negative?

*asked on September 29, 2017* -
## tourism and hospitality

how the Agricultural Revolution led to permanent settlements and technological advancements, the emergence of government and laws, and advancements in religion and culture. What would be a thesis statement for this?

*asked on September 27, 2017* -
## tourism and hospitality

what are Social or cultural impacts tourism has in UK?

*asked on September 27, 2017* -
## Calculus

Hi, I am trying to find a closed form for the power series from n=2 to infinity of x^n/(n-1)n. I'm not really sure how to do this- I found the first and second derivatives which were x^(n-1)/(n-1) and x^n-2. However, this didnt really seem to help much.

*asked on August 2, 2017* -
## math

If I have 2 sweatshirts, 2 shirts, 2 pants, 2 shorts, and 2 shoes what would the tree diagram look like?

*asked on October 20, 2016* -
## Math

5 3/8 c = _ fl oz 43 fl oz 43/64 fl oz 86 fl oz 29 fl oz 65 in. = _ ft. 6 5/12 ft. 12 ft. 5 5/12 ft. 780 ft. I confused with these, so if you could help that would be great!!

*asked on October 12, 2016* -
## Social Studies

If most Americans favor cutting spending or raising taxes to balance the budget, why have politicians not taken either of these steps to do so?

*asked on September 16, 2016* -
## Chemistry

98.4 * (1/2)^(19/3.8) = 3.075 g CH3COOH*** H2PO4^– LiOH NH3

*asked on June 1, 2016* -
## math

Half Robert’s piece of wire is equal to 2/3 of Maria’s wire. The total length of their wires is 10 feet. How much longer is Robert’s wire than Maria’s?

*asked on December 8, 2015* -
## Math

A solution of 10% sulfuric acid and one of 25% sulfuric acid are to be used to make 500 ml of 20% sulfuric acid. How many ml of each solution needs to be used in the mixture? (round answers to the nearest ml)

*asked on September 8, 2015* -
## MATH

In ΔHIJ, the measure of ∠J=90°, the measure of ∠I=64°, and HI = 5.4 feet. Find the length of JH to the nearest foot.

*asked on March 10, 2015* -
## chemistry

For the formation of ammonia, the equilibrium constant is known to be 5.2 × 10−5 at 25◦C. After analysis, it is determined that [N2] = 3.1 M and [H2] = 0.8 M, both at equilibrium. How many grams of ammonia are in the 10 L reaction vessel at

*asked on January 11, 2015* -
## math- weighted averages

Santa tasted 500 ml of a 60% solution of eggnog. How many milliliters of a 30% eggnog solution should be added to obtain a 50% solution?

*asked on December 8, 2014* -
## chemistry

Draw the three alkenes, each of formula C5H10, that will form 2-methylbutane upon hydrogenation.

*asked on November 22, 2014* -
## algebra

How long, to the nearest day, will it take $25,000 to grow to $500000 at 9% annual interest compounded monthly?

*asked on April 12, 2014* -
## algebra Word problem

what interest rate is required for an investment subject to continuous compounding to triple in 15 years? A= Pe^rt ?

*asked on April 11, 2014* -
## algebra

write the equation in standard form: 2x^2-12x+5

*asked on December 8, 2013* -
## Math

how do you subtract whole numbers into fractions?

*asked on April 18, 2013* -
## phy

An emphysema patient is breathing pure O2 through a face mask. The cylinder of O2 contains 0.20 ft3 of O2 gas at a pressure of 2200 lb/in2. (a) What volume would the oxygen occupy at atmospheric pressure (and the same temperature)? ft3 (b) If the patient

*asked on April 13, 2013* -
## phy

An emphysema patient is breathing pure O2 through a face mask. The cylinder of O2 contains 0.20 ft3 of O2 gas at a pressure of 2200 lb/in2. (a) What volume would the oxygen occupy at atmospheric pressure (and the same temperature)? ft3 (b) If the patient

*asked on April 13, 2013* -
## phy

Doppler ultrasound is used to measure the speed of blood flow. If the speed of the red blood cells is v, the speed of sound in blood is u, the ultrasound source emits waves of frequency f, and we assume that the blood cells are moving directly toward the

*asked on April 12, 2013* -
## phy

At a factory, a noon whistle is sounding with a frequency of 484 Hz. As a car traveling at 77 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory, the driver hears frequency ff. What is the change in

*asked on April 12, 2013* -
## Math

The inner diameter of a piston is normally distributed with mean of 10 cm and standard deviation 0.03cm a)below what value of inner diameter will fall fifteen percent of the piston rings?

*asked on April 7, 2013* -
## Physics

a helicopter, travelling horizontally at a constant velocity, is 82m above ground. The pilot prepares to release a package intended to land on the ground 96m horizontally ahead. no air resistance. He lets the package drop. what is the velocity of the

*asked on October 28, 2012* -
## Physics

A package of dishes (mass 50.0 kg) sits on the flatbed of a pickup truck with an open tailgate. The coefficient of static friction between the package and the truck's flatbed is 0.330, and the coefficient of kinetic friction is 0.230. (a) The truck

*asked on October 16, 2012* -
## chemistry

What is the density of a sphere with a radius of 12.7 meters and a mass of 285 kilograms?

*asked on September 8, 2012* -
## physiology/ anatomy

I'm doing a lab about osmosis/ diffusion. We put a 2 molar solution of NaCl into a dialysis bag and submerse the bag in water, weighing the bag after 15 minute increments for an hour. I need help explaining why the weight of the bag would fluctuate (EX. 6

*asked on September 7, 2012* -
## Calculus AB

Find the derivative of f(x) = 1/x(27,000,000/pi + 6,750,000) + 20pix^2 Can someone help me with this? Thanks.

*asked on May 18, 2012* -
## Calculus

I need to integrate ((e^-x)^2 - (-ex)^2)dx Can someone help?

*asked on May 6, 2012* -
## reimbursement metodologies

im currently writing a paper on this subject but have no more than the opening and first body paragraph im supposed to go into detail about how it works and the history but am having problems finding alot of information. can anyone help me out???

*asked on January 5, 2012* -
## Economics

You are considering quitting work for two years to earn an MBA. Your current job pays $25,000 per year (after taxes), but you could earn $55,000 per year (after taxes) if you had a MBA at Southern University. Tuition is $10,000 per year and the cost of an

*asked on November 6, 2011* -
## Grade 12 Data Management

A baseball player has had 14 hits in 60 times at bat in the last 20 games. How many hits does the batter need in her next ten at bats to increase the probability of her getting a hit to 0.300?

*asked on September 25, 2011* -
## math

a carpet measures 7 meters 3 decimeters in length and 4 meters 2 decimeters in width. what is its area in square meters?

*asked on April 25, 2011* -
## earth science

why are warm and cold fronts ussually weaker in the summer?

*asked on October 20, 2010* -
## earth science

what kind of air mass weather is likely to follow the passing of a warm front?

*asked on October 20, 2010* -
## geometry

the lengths [in inches] of two sides of a regular pentagon are represented by the expression 5x-27 and 2x-6 . fined the length of a sied of the pentagon.

*asked on August 30, 2010* -
## 7th grade

How do you interview a character in a book?

*asked on July 10, 2010* -
## 9th grade-Math

How do you solve this equation? 35x^2-49x __________ -7x

*asked on June 4, 2010* -
## Physics

How fast does a car have to accelerate to go from 10.0 m/s to 30 m/s in 125 meters?

*asked on January 28, 2009* -
## CHem help pkz

Bond enthalpy is the energy required to break a mole of a certain type of bond. O=O = 495 kj/mol S-F = 327 kj/mol S=O = 523 kj/mol Use average bond enthalpies to estimate the enthalpy delta H (rxn) of the following reaction: 2SF4 + O2 ---- 2OSF4 Express

*asked on November 13, 2008* -
## Interview

i have an interview tomorrow about the public issues in ohio and the future of ohio how do i go about talking/appearing/etiquette?

*asked on November 3, 2008* -
## math

let s= the sum of all even numbers from 2 to 10 {including 2 and 10} Let t= the sum of all odd numbers from 1 to 9 z{including 1 and 9.. find s-t

*asked on February 20, 2008* -
## math

how many whole numbers less than 100 does the digit 9 appear at least once??

*asked on February 20, 2008* -
## math

how can you determine whether a design has rotational symmetry? if a design has a rotational symmetry, how many can you find the angle of roation??

*asked on February 20, 2008* -
## math

how can u determine whether a design has a reflectional symmetry??

*asked on February 20, 2008* -
## math

jack an joan painted 3 houses in 12 days.At that rate, how many houses can they paint in 28 days??

*asked on February 20, 2008* -
## MATH

JACK AND JOAN PAINTED 3 HOUSES IN 12 DAYS. AT THAT RATE, HOW MANY HOUSES CAN THEY PAINT IN 28 DAYS?

*asked on February 20, 2008* -
## MATH

IN HOW MANY WHOLE NUMBERS LESS THAN 100 DOES THE DIGIT 9 APPEAR AT LEAST ONCE?

*asked on February 20, 2008* -
## science

I'm studying minerals..I understand that if molten rock cools slowly undergound, then large mineral cystals start forming. AND if that rock cools quickly at the surface, small cystals form. My ? is ..sometimes rock has both large and small mineral crystals

*asked on January 23, 2008* -
## social studies

In most countries, what is the main responsibility of the government to create?

*asked on October 29, 2007* -
## pre-cal

find the value(s) of x for which f(x)=g(x). f(x)=x^4-2x^2,g(x)=2x^2

*asked on August 28, 2007* -
## Calculus AP - Volume of Revolution

Hi. I have a few calculus problems that I have to do using the washers and shell method to find out what the volume of the graph rotated is. I'll post one question at a time with my work. The problem is, I should be getting the same answer for the problem

*asked on March 5, 2007* -
## Physics Problem - Please Help!

Okay, here's the problem: During a football game, the quarterback rolls out to his right with two huge linebackers in close pursuit. An instant before the linebackers bury him at the 50 yard line (46-m), he releases a towering pass down the sideling. The

*asked on November 5, 2006*