# Posts by Anne

Total # Posts: 783

**Chemistry**

The SI unit of length is a meter, which is defined as the length equal to 1,650,763.73 wavelengths of light emitted by a particular energy transition in krypton atoms. Calculate the frequency of the light to three significant figures.

**Chemistry**

Describe how to make 500.0 mL of 3.6 M acetone

**Chemistry**

In an experiment to measure the solubility of Ba(OH)2 x 8H2O in water, an excess of solid Ba(OH)2 x 8H2O was stirred with water overnight. the saturated solution was allowed to stand until all the undissolved solid had settled. a 10.00mL sample of the clear supernatant liquid ...

**Chemistry**

The solubility of CaSO4 is 0.209 g/100 mL of water at 30 degrees celsius. if 0.500 g CaSO4 is stirred overnight at 30 Degrees Celsius with 100.0 mL of water, a. How many grams of CaSO4 remain undissolved? b. Calculate the molarity of CaSO44 in solution

**Chemistry**

a 2.00 g sample of zinc was dissolved in 50.0 mL of 6.0 M HCL the final volume of solution was 50.2 mL... a. what was the concentration of Cl- after the zinc was dissolved?? b. what was the concentration of hydrogen ion after the zinc was dissolved??

**Chemistry**

assuming that each molecule contains one acidic hydrogen---that is, the formula is HCnHmOp? assumin gthat each molecule contains 2 acidic hydrogens---that is, the formula is H2CnHmOp??

**Chemistry**

By titration 24.68mL of 0.1017 M NaOH is required to neutralize 0.1482 g of an unknown organic acid. what is the formula mass of the acid?

**Government**

Im not asking for the answer im asking you to help me to understand what the question is asking for. If I could understand it from my book i would

**Government**

please help me with an explanation

**Government**

1. c 2.a 3.a

**Government**

Pluralists believe that the dominant player in American politics is (1 point) the president. groups. the government. rich individuals. the media. All of the following are generally more true of Americans than Europeans EXCEPT (1 point) they volunteer more time to their ...

**Physics**

A cannonball is fired with a velocity of 200 m/s at an angle of 25 degrees above the ground. After the total flight of 45.6 seconds, the cannonball returns to the ground. Calculate: the initial horizontal and vertical components of the velocity, the maximum height of the ...

**Physics**

A car of mass 1396 kg is parked on a very slippery hillside.To keep it from sliding down the hill (è = 15°), the owner attaches a cable. What is the tension in the cable?Determine the components of all the forces on the car along the coordinate axes.

**Physics**

Block 1 sits on a table with rope that is attached to block 2 hanging over the edge where m1 = 43 kg and m2 = 11 kg. Assume that there is no friction between m1 and the table. Find the acceleration of the crates and the tension in the string

**Physics**

Block 1 is up an incline and is attacthed to block 2 by a rope, with m2 = 5.0 kg and è = 33°.If the coefficient of static friction between block #1 and the inclined plane is ìS = 0.24, what is the largest mass m1 for which the blocks will remain at rest?

**Physics**

Consider a swimmer who wants to swim directly across a river. If the speed of the current is 0.31 m/s and the swimmer's speed relative to the water is 0.57 m/s, how long will it take her to cross a river that is 13 m wide?

**Physics**

A soccer ball is kicked with an initial speed of 23 m/s at an angle of 20° with respect to the horizontal.(a) Find the maximum height reached by the ball. (b) Find the speed of the ball when it is at the highest point on its trajectory. (c) Where does the ball land? That ...

**Physics**

A baseball is hit with an initial speed of 42 m/s at an angle of 30° relative to the x (horizontal) axis.(a) Find the speed of the ball at t = 3.4 s. (b) What angle does make with the x axis at this moment? (c) While the ball is in the air, at what value of t is the speed ...

**Physics**

A bullet is fired from a rifle with a speed v0 at an angle è with respect to the horizontal axis from a cliff that is a height h above the ground below. Calculate the speed of the bullet when it strikes the ground.

**Physics**

A block slides down an inclined plane that makes an angle of 23° with the horizontal. There is friction between the block and the plane. If the acceleration of the block is 2.1 m/s2, find the coefficient of kinetic friction between the block and the plane.

**US Government**

Critics argue that they slow down decision-making and create conflict. Evaluate the criticisms, and explain the justification for continuing the Madisonian model.

**French**

Merci Mme!!!

**French**

Thank you!! Was that all that needed correcting?

**French**

Can someone correct my paragraph? Write a good, 6 sentence paragraph using both the passé compose and imparfait describing a recent outing to a café or restaurant for breakfast or lunch. What did you order? How was the restaurant? La semaine dernière je ...

**college chemistry**

Please be specific! Briefly explain whether each if the following procedural errors would result in a high, low, or an unchanged calculated mass of Ca2+ in the analyzed tablet. a)a student had difficulty decanting the supernatant solution from the test tubes in step 9, causing...

**college chemistry**

a student determined the Ca^2+ ion content of a 100mL sample of calcium-fortified orange juice. After adding 2.0M HCl solution to the sample, the student filtered the juice to remove the pulp and other particulate matter. Then the tudent added Na2CO3 solution to precipitate ...

**college chem**

Mg and O lab how will the relative number of moles of mg and o be affected if the following procedural errors are made? a)crucible is not brought to constant mass before the Mg is added. b)water is not added after the first heating of Mg, and the entire solid in the crucible ...

**Physics**

An object is thrown vetically upward with an initial velocity of 14.7 m/s.How long does it take for the object to be 9.8 m from its initial position?What is the instantaneous velocity at 9.8 m from its initial position. Explain why two answers arise.

**Chem II/College**

Mg and O lab how will the relative number of moles of mg and o be affected if the following procedural errors are made? a)crucible is not brought to constant mass before the Mg is added. b)water is not added after the first heating of Mg, and the entire solid in the crucible ...

**Biology**

Scientists observe a newly established population of sexually reproducing plants growing on the shore of a small island. An observable trait of the plant has two possible phenotypes. It is determined by a single gene, with the dominant allele having complete dominance over the...

**ENGLISH**

Briefly describe Poe’s requirements for the short story genre.

**Physics**

56

**College Chemistry**

how would you prepare 175.0ml of .150 m agno3 solution starting with pure agno3

**college physics**

An object acted on by three forces moves with constant velocity. One force acting on the object is in the positive x direction and has a magnitude of 6.5 N; a second force has a magnitude of 3.9 N and points in the negative y direction. Find the direction and magnitude of the ...

**ENGLISH**

Read the following passage. In 3–5 sentences, identify who wrote it. Support your choice with details about the content or style of the passage. "One day, when all our people were gone out to their works as usual, and only I and my dear sister were left to mind the ...

**ENGLISH**

is it the star spangled banner

**ENGLISH**

6. The following words share a denotative meaning. Which one has a negative connotation? (1 point) confident certain decisive demanding ~ 7. Read the following Chippewa song. Identify its purpose. A loon I thought it was But it was My love's splashing oar. (1 point) to ...

**Physics**

A tall strongman of mass m = 93 kg stands upon a scale while at the same time pushing on the ceiling in a small room.If the scale reads 1062 N (about 239 lb), what is the magnitude of the normal force that the ceiling exerts on the strongman?

**Physics**

A mass with M = 122kg is attached to the bottom of a block-and-tackle pulley system.How much tension force is needed to keep the mass at its current position?

**Physics**

A car travels at 64 mi/h when the brakes are suddenly applied. Consider how the tires of a moving car come in contact with the road. When the car goes into a skid (with wheels locked up), the rubber of the tire is moving with respect to the road; otherwise, when the tires roll...

**Physics**

An elevator is moving at 1.1 m/s as it approaches its destination floor from below. When the elevator is a distance h from its destination, it accelerates with a = −0.55 m/s2,where the negative sign indicates a downward vertical direction. Find h.

**Calculus**

Determine the polar form of the complex number 3 - 2i. Express the angle theta in degrees, where 0 < theta < 360°, and round numerical entries in the answer to two decimal places. 326.31(cos 326.31° – isin 326.31°) 3.61(cos 326.31° &#...

**US Government**

ideas on how to answer these?

**US Government**

help me answerthe question please. some ideas.

**US Government**

Explain how separation of powers and checks and balances reflect the founders' views of human nature and power in government. Discuss two other influences on the development of the U.S. Constitution

**Calculus**

Find the polar coordinates of (8, –8) for r > 0.

**Pre-calc**

1. Find the polar coordinates of (8, –8) for r > 0. 2.Find the rectangular coordinates of (9, 150°)

**phy**

A jet has a speed of 500m/s relative to the air in which it flies and is traveling north. There is a crosswind blowing from west to east at 100m/s. What compas heading does the plane appear to fly toward?

**algebra**

solve the inequality and write the solution set using interval notation. 4x+7 <2x+5 _____ -3

**Chemistry**

Calculate the volume of water, in milliliters, that would be displaced by a piece of gold weighing 18.2g.

**Chemistry**

Calculate the volume of water, in milliliters, that would be displaced by a piece of gold weighing 18.2g.

**Chemistry**

Calculate the volume of water, in milliliters, that would be displaced by a piece of gold weighing 18.2g.

**Math**

The car in the figure below travels a distance of 745 m along the track, and the driver finds that she has traveled through an angle of 475°. What is the radius of the track?

**Physics**

The car in the figure below travels a distance of 745 m along the track, and the driver finds that she has traveled through an angle of 475°. What is the radius of the track?

**5th grade religion**

i am supposed to look on the internet for this question but i don't have a clue

**Chemistry (quick clarification please?)**

Is 50 ml of a 50 mM solution of NaCl the same concentration as 100 ml of a 100 mM solution of NaCl?

**College Biology help!**

Is this true? Explain. To make a 100 osmolar solution of magnesium chloride, 60g of the salt are placed in a liter of water.

**algebra**

3x/y - 5

**Calculus**

TWO examples of each of the following: two sided limits and theorem on limits (SUM, difference, product, quotient, nth root, ).

**Algebra**

Hi! Just want to ask if 1/x-1 - x/x-1 equal to 1? That is what I got when I solved it. Thanks.

**Algebra**

(a^2 - 4a)/(a^2-a-6) minus (a-6)/a^2-a-6)

**Algebra**

Kindly solve this and give its restriction. (5-xy)/(9z) - (14+8xy)/(9z)

**Algebra**

Simplify the rational expression and write the restriction for the simplified rational expression. x^3 - 8 ----------------------- x^2 + xy - 2x - 2y

**Algebra**

The perimeter of a heptagon is 9a^2s ft. The perimeter of a triangle is 6a^6b^2s ft. Find the ratio of the perimeter of the heptagon to the perimeter of the triangle.

**AP World History**

How did rum play a role in the American Revolution?

**Math**

A rectangular sandbox has a length of 60 inches, a width of 40 inches, and a depth of 6 inches. What is the volume in cubic inches?

**chemistry**

What does 1.5 fold dilution and 2.5 fold dilution mean?

**Math**

I just did.. Thanks! Was it 3665?

**Math**

Oh, sorry. It was 2, not 3 ..

**Math**

i am a four digit numeral number between 3000 and 4000.My ones digit is 3 greater than my thousands digit.The two other digits are the same.If the sum of my digit is 20,what number am i?

**Math**

I am number greater than 70 000 but less than 90 000.My ones digit is the only even prime number.My tens digit id the same as my ones digit.My ten thousands digit is four times my ones digits.Both my hundreds and thousands digits are half the ten thousands digits.What number ...

**Math**

What is the least number that can be formed using 4 9 2 1 3 0 6?

**Math**

I am number greater than 70 000 but less than 90 000.My ones digit is the only even prime number.My tens digit id the same as my ones digit.My ten thousands digit is four times my ones digits.Both my hundreds and thousands digits are half the ten thousands digits.What number ...

**Math**

What is the greatest 7 digit number without repeating any digit?

**Math**

i am a 4 digit number between 3000 and 4000.My ones digit is twice my thousands digit.My hundreds digit is the same as my ones digit and my tens digit is one less than the hundreds digit.If the sum of my digit is twenty,what number am i?

**GEOMETRY**

Length of the diameter of a circle with the endpoints A(4, -3) and B(4, 3)

**Chemistry**

I have liquid concentrated HCl (37%w/w) To prepare 100ml of 10g/L HCl as a solvent medium, is it acceptable to just weigh 1g of liquid conc HCl and dilute to 100ml with water? What volume of conc HCl should we use to make 100ml of 10g/L HCl?

**writing**

Write a journal entry describing a day in the life of a snake in the wild from the snake's point of view. At least 5 sentences

**English**

would "the only heroic thing is the sky" be personification?

**Math :(**

Great answer and great way to explain. I would do the same thing. This is easy for me

**Math riddle**

122

**Accounting**

Please prepare the following journal entries. Indicate which account should be debited and which account should be credited along with the dollar amount of the debit and credit. a) Investors invested $100,000 in exchange for 10,000 shares of common stock. b) Company paid a ...

**Chemistry**

A 1.00-L solution saturated at 25°C with calcium oxalate (CaC2O4) contains 0.0061 g of CaC2O4. The solubility constant (Ksp) for this salt is [CaC2O4=128.09 g/mol]

**Chemistry**

How would you find the pH of a solution prepared by mixing 50 mL of 0.125 M KOH with o.050 L of 0.125 M HCl?

**physics 2**

A concave mirror has a focal length of 27.0 cm. The distance between an object and its image is 46.5 cm. Find the object and image distances, assuming the following. (a) that the object lies beyond the center of curvature do = di = (b) that the object lies within the focal ...

**hca/210**

examples of position in healthcare for the four functions of management

**Physics 2**

The average intensity of light emerging from a polarizing sheet is 0.807 W/m2, and the average intensity of the horizontally polarized light incident on the sheet is 0.972 W/m2. Determine the angle that the transmission axis of the polarizing sheet makes with the horizontal.

**math**

The average of two numbers is 34. The first number is three times the second number. what are the two numbers?

**Math**

Jillian must average at least 90 on two quiz scores before she can move to the next skill level. Jillian got a 92 on her first quiz. What scores could Jillian get on her second quiz in order to move to the next skill level? How could I answer this is an two-step inequality form?

**Physics**

A 30.0 kg box is being pulled across a carpeted floor by a horizontal force of 230 N., against a friction force of 210 N. Calculate the acceleration of the box and find the x and y components of the acceleration of the box. Align the positive direction with the normal force ...

**Physics**

Thanks! I did get this far, but it didn't seem right!

**Physics**

A loud speaker of mass 24.0 kg is suspended a distance of h = 2.00 m below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of 3.50 m. What is the tension in each of the cables?

**Science**

What does a thermohygrometer do?

**Chemistry**

How long can we use a bottle containing anti-bumping granules? Can it be used indefinitely?

**Chemistry**

I know that it's made up of one molecule from fructose and one molecule from glucose. i think it has a 12 Carbon atom ring... but that's really all I know

**Chemistry**

Can you label all the functional groups of the Sucrose Molecule?

**Probability**

Six marbles are chosen without replacement from a box containing 10 red, 8 blue, and 3 yellow marbles. Let X be the number of blue marbles chosen. a) Find the probability distribution of X. b) Find the mean of the random variable X

**Probability**

7) Suppose that you roll a pair of standard 6-sided dice a total of 42 times. What is the probability that you will get a sum of 5 at least four times?

**Chemistry**

What is the function of Compressed Air in GC-FID (i.e. Gas Chromatography-Flame Ionization Detector)?

**Science-Chemistry**

In the following test for Sulfated Ash, ammonium carbonate solution was added. What is the purpose of adding ammonium carbonate solution? Heat a silica crucible to redness for 30 minutes, allow to cool in a desiccator and weigh. Place 1g of the substance in the crucible and ...