# miranda

Newest questions posted by miranda-
## Chem

Please someone Help!! Acetic acid, CH3COOH, is a weak organic acid, pKa 4.47. Determine the position of the equilibrium for the reaction of acetic acid with NaHCO3, and draw the species that predominates at equilibrium. -
## chemistry

For the exothermic reaction PCl3(g)+Cl2(g)⇌PCl5(g) K = 0.160 at a certain temperature. A flask is charged with 0.507 bar PCl3 , 0.507 bar Cl2, and 0.304 bar PCl5 at this temperature. What are the equilibrium partial pressures of PCl3 , Cl2, and PCl5, -
## Chemistry

Describe how to make 20 mL of a 6.0 % solution from a stock solution with a concentration of 10 %. -
## Math

Valentina purchased 200 beads for $48 if she needs to buy 25 more beads how much will she pay if charged the same rate -
## algebra

Peter has 800 yards of fencing to enclose a rectangular area. Find the dimensions of the rectangle that maximize the enclosed area. What is the maximum area? -
## Chemistry

How many grams of KI must be added to a 250-ml volumetric flask to prepare a water solution that is 0.100 M in potassium iodide? -
## Chemistry

Write the formulas of the compounds formed by NH4+ with the following anions: CN−, HCO3−, SO42−, HPO42− -
## Algebra

factor the following quadratic expressions, if possible. k^2-12k+20 6x^2 + 17x - 14 -
## Math

The dressmaker has 3/8 yard of fabric. She needs a total of 3/4 yard for a vest. How much more fabric does she need? -
## science (ASAP)

identify the terms or phrases that are paired together correctly a. deserts and dwarf trees b. temperate and deciduous forest and evergreen trees c. subarctic taiga and moss d. tundra and permafrost *** -
## social studies

(PLEASE HELP) from where did Islam spread? a. from India to Arabia b. From the persain empire to the arab emirates c. from macedonia with alexander the great d. from mecca and medina through arabia -
## science (ASAP)

what does the notation TT mean to genetics -
## math

plss help equation for this statement the distance D travelled by a car varies directly as its speed s -
## ELA

"The Enlightenment and the Scientific Revolution were twin explosions in thinking that made the 17th and 18th centuries one of the most exciting and dynamic eras in European history. People cam to believe the power of human reason apart from the guidance -
## Physics

you toss a racquetball directly upward and then catch it at the same height you released it 1.90 s later. Assume air resistance is negligible.What is the acceleration of the ball while it is moving upward?What is the acceleration of the ball while it is -
## math help

Question 1: Robby wants a secured loan to start his own business. Robby will use his house as collateral. The bank will loan Robby 56.4% of his house's equity. Robby's house is worth $367 685. He owes $108 653 on it. What is the equity in Robby's house? -
## Math (Grade 12)

Question 1: Robby wants a secured loan to start his own business. Robby will use his house as collateral. The bank will loan Robby 56.4% of his house's equity. Robby's house is worth $367 685. He owes $108 653 on it. What is the equity in Robby's house? -
## math

Lucy's employer pays 70% of the total cost of her family's health insurance plan, while Lucy pays the rest. If the total cost of the plan will increase from $450 per month to $650 per month, how much more will Lucy have to pay each month? -
## math

Find two mixed numbers that up to 16 but have a difference of 5??? -
## math

find all solutions in the interval [0,360degrees) sin(5x)=0 -
## Chemistry

Calculate the standard enthalpy change for the reaction 2A+B⇌2C+2D Use the following data: Substance ΔH∘f (kJ/mol) A -251 B -403 C 213 D -511 My thoughts: [(2)(-511)+(213)(2)]-[(2)(-251)+(-403)]=309kJ (but apparently that is not the correct answer) -
## Trigonometry

two pulleys of a car engine radius of 8 cm and 5 cm respectively are connected by a belt. The larger pulley rotates 80 times per minute. Find the angular velocity of each pulley in radians per minute. -
## Chemistry

Underground miners formerly used headlamps in which calcium carbide (CaC2) was reacted with water to form acetylene (C2H2) gas as shown in the following reaction: CaC2(s) + H2O (l) ---> C2H2 (g) +Ca(OH2)(s) The acetylene produced was then burned to produce -
## geometry

figure of kite top pointed left. Tail is point E. Segment from AB perpendicular to CD. Top side of kite is AC, bottom side is CB. I figured it ==== AC 9y-6 = 7y; I got 3 for y. So, C = 21; for (x) I got 5x+18=5x + 15 (x) = 3. So AD IS 9. AE is 5x+6y= -
## geometry

I tired but answers don't make since. Problem is segment CD is perpendicular bisector of segment AB. Need to find lengths of AC (9y-6), AD (3x), and AE ((5x +6). Others: BE=(5x+ y), BD (x + 10) and CB (7y). Figure like a kite. HELPPPPPPPPPP. -
## geometry

I tried to figure this problem out, Did I do it correct? m -
## Chemistry

The thermochemical equation which is associated with ∆H°f, the standard enthalpy of formation, for urea, CO(NH2)2 (s), is: CO (g) + 2NH3 (g) --> CO(NH2)2 (s) + H2 (g) CO (g) + 2H2 (g) + N2 (g) --> CO(NH2)2 (s) C (s) + O (g) + N2 (g) + 2H2 (g) --> -
## math

which mixture is more blue? 4gallons primer over 8 gallons paint or 3 gallons primer over 5 gallons paint -
## math

Clark is cooking a 12 pound ham. The ham needs to be cook 20 minutes for each pound. Clark wants to serve the ham at 5 p.m. What is the latest time he should place the ham in the oven. -
## math

Riley wants to raise $2550 for a fundraiser walk. He needs to ask people to pledge money for each mile that he walks. How many people will he need to get pledges from in order to reach his goal. -
## math

Complete the pattern 82,71,60,?,? -
## math

Complete the pattern 4,13,22,?, ? -
## math

you are ordering pizza for a party. One pizza serves 8 people. You are expect that there be 35 people. How many pizzas should you order. -
## chemistry

A 14.0 kg sample of lead is measured out at 4 degrees celcius what is the specific gravity of lead? -
## math

which numbers should you add to estimate the answer to this problem: 87,087 + 98.000 - 88,000+ 98,000 -85,000+95,000 - 87,000 +98,000 - 80,000+ 90,000 thanks for your help! -
## Math

A factory produces fuses, which are packaged in boxes of 16. Three fuses are selected at random from each box for inspection. The box is rejected if at least one of the three fuses is defective. What is the probability that a box containing six defective -
## chemistry

What is the percent yield of NaCl if 31.0 g of CuCl2 reacts with excess NaNO3 to produce 21.2 g of NaCl? -
## Algebra

Gustav’s father is seven times as old as he is. A year ago, he was nine times as old as Gustav. Find Gustav’s present age. -
## 7th grade English

Use the correct pronoun in parentheses. The book ( it, itself) is a collector's item. Please help. Thanks. -
## physics

If my kinetic coefficient and static coefficient are both 1.02, how can I explain why they are the same???? (For a horizontal surface) -
## Physics

If the gravitational force between objects of equal mass is 2.30x10^-8 N when the objects are 10.0m apart, what is the mass of each object? -
## Physics

A ball rolling down a hill was displaced at 19.6m while uniformly accelerating from rest. If the final velocity was 5.00 m/s what was the rate of acceptation? -
## Physics

A projectile is fired off a 35m cliff at 18m/s. what horizontal distance does the projectile travel before hitting the ground? -
## Physics

a rubber ball is thrown downwards off a balcony. after it travels 55m it has a speed of 46.5m/s. what is the initial velocity -
## chemistry lab

obtaining a smaller amount of sio2 than was present in the original sample -
## chemistry lab

list the possible manipulation errors that might contribute in obtaining a significantly larger amount of nacl than was present in original sample -
## Science - physics

Imagine you need to deliver a piano over three steps. A longer ramp translates into less force necessary to raise the piano's height than a shorter ramp would require. Calculate the percentage smaller a force would be required using an 2.8m long ramp -
## American Goverment

Despite their differences, the Founding Fathers all agreed that _____. democracy was the most important political value the Constitution should balance order, liberty, and popular sovereignty freedom must be protected at all costs a monarchy should be -
## American Goverment

Philadelphia, Pennsylvania was NOT _____. the location the 1787 Constitutional Convention. the city where the Declaration of Independence was signed the childhood home of Thomas Jefferson and John Adams an important city in colonial America 22. For the -
## chemistry

The H3o+ concentration of a solution is found to e 3.40*10^-6. What is the pH of the solution? what is the H3O+ concentration? what is the OH- concentration? is this and acidor a base? -
## chemistry

If 37.0 mL of HCl is used to neutralize 25.0 mL of 0.09345M LiOH. What is the concentration of the acid -
## chemistry

If 37.0 mL of HCl is used to neutralize 25.0 mL of 0.09345M LiOH. What is the concentration of the acid -
## chemistry

If 7.50 mL of 0.100M HCl is mixed with 12.5mL of NaOH. What is the concentration of the base -
## Physical sciences

What is the universal law? -
## poetry

What is the authors tone in the poem arithmetic? -
## math

the product of 16 and c is increased by 6 to equal the qoutient 25 and 9. what is c? -
## physics

A collision occurs between two pucks on an air-hockey table. Puck A has a mass of 0.020 kg and is moving along the x axis with a velocity of +5.5 m/s. It makes a collision with puck B, which has a mass of 0.040 kg and is initially at rest. The collision is -
## Physics

A 4.90-kg ball, moving to the right at a velocity of +2.50 m/s on a frictionless table, collides head-on with a stationary 8.00-kg ball. Find the final velocities of the balls if the collision meet the following conditions. (a) elastic 4.9-kg ball = 8-kg -
## Algebra 1

Okay one last one that I've spent all night truing to figue out. 2. The width of a rectangle is 6 cm longer than its length. Its perimeter is more than 36 cm. Let l equal the length of the rectangle. a. for the width in terms of the length. W= l + 6= -
## Algebra 1

So as I was doing me hw, I ran into this question, and I cant figure it out... Anyone wanna try? 7. The ratio of the perimeters of two triangles is 2:5. The perimeter of the larger triangle is 20 cm. What is the perimeter of the smaller triangle? -
## Algebra 1

Okay. So I am completely lost with this... Any help would be great! 3. Solve the system using any method – graphing, substitution, or linear combination. Make sure to show your work. 2x + 5y= 8 x + 3y= 2 -
## Calculus

the area of the first quadrant region bounded by the y-axis, the line y=4-x and the graph of y=x-cosx is approximately: a) 4.50 square units, b) 4.54 square units, c) 4.56 square units, d) 4.58 square units, e) 5.00 square units -
## calculus

A ball is thrown vertically upwards from a height of 6 ft with an initial velocity of 60 ft per second. How high will the ball go? Note that the acceleration of the ball is given by a(t)= 32 feet per second per second. -
## geometry

What is the endpoint of a segment with endpoints -33 and 47? -
## physics

You drive a car for 2.0 h at 35 km/h, then for another 2.0 h at 64 km/h. (a) What is your average velocity? (b) What is your answer if instead you drive 99 km at each of the two speeds? -
## physics

An engineer must design a runway to accommodate airplanes that must reach a ground velocity of 60 m/s before they can take off. These planes are capable of being accelerated uniformly at the rate of 2.1 m/s2. (a) How long will it take the planes to reach -
## physics

Engineers are developing new types of guns that might someday be used to launch satellites as if they were bullets. One such gun can give a small object a velocity of 2.9 km/s, moving it through only 1.6 cm. (a) What acceleration does the gun give this -
## physics

A supersonic jet flying at 137 m/s is accelerated uniformly at the rate of 23.1 m/s2 for 20.0 s. (a) What is its final velocity? (b) The speed of sound in air is 331 m/s. How many times the speed of sound is the plane's final speed? -
## physics

You drive a car for 2.0 h at 35 km/h, then for another 2.0 h at 64 km/h. (a) What is your average velocity? (b) What is your answer if instead you drive 99 km at each of the two speeds? -
## physics

A car is moving down a street at 51 km/h. A child suddenly runs into the street. If it takes the driver 0.62 s to react and apply the brakes, how many meters will the car have moved before it begins to slow down? -
## physics

A car with a velocity of 19 m/s is accelerated uniformly at the rate of 1.8 m/s2 for 6.8 s. What is its final velocity? -
## physics

A car with a velocity of 19 m/s is accelerated uniformly at the rate of 1.8 m/s2 for 6.8 s. What is its final velocity? -
## Chemistry

The mass of a single uranium atom is 4.70E-22 grams. How many uranium atoms would there be in 167 milligrams of uranium? -
## Math

Mr. Frank is shopping for carpet for his living room and dining room. The living room is 20 feet by 16 feet and the dining room is 11 feet by 10 feet. He looked at two differently priced carpets. One for $14.99 a square yard installed and another for -
## Math

Conrad taxi service charges $1.50 for the first mile and $0.90 for each additional mile. How far can Mr. Kulp go for $20 if he gives the driver a $2 tip. Write a let statement; represent the additional miles in terms of the total travelled. Write an -
## American Government

True or False? About 75 % of those eligible to vote did so in the 2000 presidential election? -
## Math

Last week Frank worked as a waiter for 6&1/4 hrs, earning $9.80 per hour. He also earned $14.50 per hour delivering packages for 7&1/2 hours. How much money did he earn last week? -
## Math

Casey paid $45 for one new tire and one used tyre for his bicycle. The new tire costs $17 more than the used tire. How much did the new tire cost? I have worked out the answer in my head, ($31) but is there a particular formula I can use or follow. -
## childcare

1. A child who moved from throwing a ball using only an elbow movement to throwing a ball using her elbow, wrist, and shoulder is showing signs of ______development. a.intertask b.spatial c.joint-plate d.intratask 2. According to Leeds, at snack time, -
## Living a Healthy Life

Some child psychologists have concluded that _________ is the strongest predictor of both scholastic and career achievement. a.physical illness b.respect for authority c.emotional well being d.inherted intelligence -
## child care

Some child psychologists have concluded that _________ is the strongest predictor of both scholastic and career achievement. a.physical illness b.respect for authority c.emotional well being d.inherted intelligence My answer-d -
## Living a Healthy Life

children should not be served drinks in containers made of... a. styrofoam b. uninsultated paper c. treated ceramic d. stainless steal My Answer is... b. -
## Living a Healthy Life

1.When playing outside, children should wear protective clothing and play in shaded areas to a.avoid radiation from sunlight b.avoid being stung or biteen by insects c.prevent attacks of scabies d.stay cool and maintain psychological My Answer - C 2. What -
## Living a Healthy Life

2.Temperatures in child care education setting should be set at __ in the summer and __ in the winter. 1. 55 to 65, 65 to 85 2. 60 to 63, 70 to 73 3. 68 to 72, 65 to 75 4. 72 to 80, 70 to 80 My answer is... 2. 60 to 63,70 to 73 Pls let me know if this is -
## Algebra

The bus stations in Trawlwy and Fenton are 220 miles apart. A bus left Trawley for Fenton at 9:00am. Traveling at 40 miles per hour. One hour later, an express bus left Fenton for Trawley traveling along the same road at 50 miles per hour. At what time did -
## Math

The bus stations in Trawlwy and Fenton are 220 miles apart. A bus left Trawley for Fenton at 9:00am. Traveling at 40 miles per hour. One hour later, an express bus left Fenton for Trawley traveling along the same road at 50 miles per hour. At what time did -
## Algebra

The bus stations in Trawlwy and Fenton are 220 miles apart. A bus left Trawley for Fenton at 9:00am. Traveling at 40 miles per hour. One hour later, an express bus left Fenton for Trawley traveling along the same road at 50 miles per hour. At what time did -
## Algebra

In Vanessa's coin bank there are 4 times as many quarters as nickels, 2 fewer dimes than nickels, and 15 pennies. The total amount in the bank is $5.80. How many of each coin are in the bank? A. Assign a variable to the unknown quantity. B. Write an -
## algebra

For what value (s) of P could the expression 100 divided by P squared minus 16 NOT be evaluated? Explain how you arrived at your answer? -
## Chemistry

1. Tube # 3: (a) It started out as purple, and turned into green. (b) No precipitate was noticably formed. Tube #4: (a) This tube was purple, and turned into white. (b) A brown precipitate was formed after adding 1 mL of NaHSO3. Tube #5: (a) This tube was -
## math 7th grade

What does it mean to ring four integers that yield a sum. The sum is 2. -
## hospitality

why and when you whip eggs? -
## US History

Flow chart. One Box then two boxes then 6 boxes. The words are: Freedom of Religion Freedom of Speech Involvement in Government Obey The Law Respect the Rights of Others responsibilities right to vote rights. Don't know how to put the flow chart together. -
## math

If I have 4 sides of a square and I take out 3 1/2 what do i have left? it has to be a whole -
## social studies, civics

so i have to write a paper pretending to be a republican candidate, and trying to get my class members to vote for me. I really have no idea how to do this /: any ideas? -
## History

what did conscientious objectors do during world war one -
## Chem (last question, I promise)

You measure one edge of a cube using a meter stick marked in centimeters. Unfortunately, the edge is longer than 1 m. You mark the 1-m point on the cube edge with a pen and then, using a 15-cm ruler marked in millimeters, measure the remaining distance to -
## Chemistry

How do you do this? A block of metal measuring 3.0 cm X 4.0 cm X 5.0 cm has a mass of 470.0g. What is the density of the metal in grams per cubic centimeter? -
## Chem (conversions)

How do you convert? (a) 72 F to C and K (b) -12 C to F and K (c) 178 K to and C -
## Chem

How do you convert? (a) 4.50 Cal to calories (b) 600.0 Cal to kilojoules (c) 1.000 J to calories (d) 50.0 Cal to joules

## Pages

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