# Posts by zach

Total # Posts: 415

**Chemistry**

A sample of gas contains 0.1900 mol of HBr(g) and 9.500×10-2 mol of Cl2(g) and occupies a volume of 11.2 L. The following reaction takes place: 2HBr(g) + Cl2(g)2HCl(g) + Br2(g) Calculate the volume of the sample after the reaction takes place, assuming that the ...

**Mathematics**

Area is 56

**Mathematics**

(-1,-6) The perimeter is 30

**Chemistry**

Write a net ionic equation for the reaction that occurs when aqueous solutions of barium hydroxide and hypochlorous acid are combined.

**Chemistry**

Write a net ionic equation for the reaction that occurs when aqueous solutions of barium hydroxide and hypochlorous acid are combined.

**Math. (Didn't understand please help!)**

Oh okay, nvm. My internet lagged so I guess it took awhile for your response. Thank you!

**Math. (Didn't understand please help!)**

Um...Mrs. Sue? I know you're answering others but I need to know whether it's A.

**Math. (Didn't understand please help!)**

Is that the correct answer?

**Math. (Didn't understand please help!)**

A?

**Math. (Didn't understand please help!)**

Suppose 20% of babies born are born early, 50% are born on time, and 30% are born late. A nurse uses a random-number table to find the experimental probability that of 5 births, at least 1 baby will be born early. The digits 0 and 1 represent babies born early. The digits 2, 3...

**Social Studies (Check my answers please!)**

What did the Mayan caldenders track? 1. Religous celebrations and battles 2. Religous celebrations and the seasons ** 3. Games of pok-ta-tok and the seasons 4. Games of pok-ta-tok and battles The Aztech capital of Tenochtitlan stood on the site of present-day_______. 1. Los ...

**algebra**

what is the inverse of the given relation? for the function f(x)=xx-2,find (fof-1)(10)

**Math**

The cost of producing x units of a product is given by C(x)=800+120x?120ln(x),x?1. Find the minimum average cost, which is defined as C(x)/x (the total cost divided by the number of units). Minimum Average Cost =

**math**

Here is the question: a ball is dropped from a height of 3m and bounces on the ground . At the top of each bounce, the ball eaches 60% of its previous height. Calculate the total distance travelled by the ball when it hits the ground for the fifth time? I know you need the n, ...

**Global History**

1. It is often said that Islam is more than a religion, it is a way of life; and followers of Islam belong to an abstract world community. To what extent and in what ways is the Islamic world a distinct and coherent civilization— even to this day? How and why did this occur?

**Cell Biology**

It is B

**Physics**

a truck travels up a hill with a 12% incline. the truck has a constnt speed of 22m/s. what is the horizontal componet of the reucks velocity

**Chemistry**

0.250 g KCN is dissolved in 50 mL of water, and added to 2 mL of NaOH then mixed with 48mL of water. What is the molar concentration of KCN? I am stuck on this question. So far I have: 0.250gKCN/0.050L= 5M(g/L) Moles of KCN: 5M = mol/0.05L = 0.25mol KCN I am not sure exactly ...

**Chemistry**

If 100.0 mL of 0.171 M Na2SO4 are added to 100.0 mL of 0.889 M Pb(NO3)2, how many grams of PbSO4 can be produced? Equation: Na2SO4 + Pb(NO3)2 = 2NaNO3 + PbSO4

**History**

A

**Statistics**

Free Throw Freddie is an 80% free throw shooter. At the end of practice he shoots until he makes 10 shots. a) What is the probability that Freddie makes 10 in a row? b) What is the probability that Freddie needs 15 or more attempts? I understand how to do part a), but I'm ...

**Calculus**

The following equation defines y as a function of x. −5xy−3x=−6y

**Math**

A function f is defined by the equation f(x)=4x−8. Suppose that the state variables T and Q are related by this function according to the mapping f:Q↦T. Suppose that T=3. Use the equation of the function to find the value of Q.

**Math**

Player B longest home run distance is 500 feet there are 5280 feet in one mile how many home runs will player B need to hit at his longest distance for the total to be greater than 1 mile

**Math**

Player B longest home run distance is 500 feet there are 5280 feet in one mile how many home runs will player B need to hit at his longest distance for the total to be greater than 1 mile

**Probability :(**

The first part you have right fundamental counting principal = 4*2*2 = 16 Next we need to find out what are the chances she picks the banana colored bike with a basket = 2/16 or 1/8 and the chance she picks the Atomic Tangerine bike without the horn = 2/16 or 1/8 The key word ...

**Math**

The 3 digit number in which the ones digit is three times the tens digit and the tens digit is three times the hundreds digit is?

**math**

A 97-cm board is cut into two pieces. If one piece is 35 cm shorter than the other, how long are the two pieces?

**Science**

1.) when might preserved remains of an entire organism form? A.) when sediment buries the hard part of an organism B.) when an event such as a quick burial or freezing preserves an entire organism ******* C.) when minerals replace parts of an organism D.) when a thin layer ...

**Science HELP PLS**

how are earth and venus similar? how is venus different from earth? provide two similarities and two differences

**AP Chemistry**

If 400 mL of 3.5 molar HCl solution is added to 200 mL of 2.3 molar NaOH solution, what will be the molarity of NaCl in the resulting solution? Answer in units of M.

**Social Studies**

where is the moon when you are in a location experiencing a low tide

**Math- 2 questions!**

Correct.

**Social Studies**

more into detail please

**Social Studies**

how did the europeans feel about the founding of america

**Math**

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol

**Math**

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol

**Math**

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol

**Math**

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol

**Math**

Solve the inequality. Expression solution set using interval notation and graph the solution set using a number line. -15x+3<_-3(4x-7) Thats supposed to be a greater than or equal to sign lol

**physics**

You are on a hike in the mountains. You have 3.03 km left to go before your next campsite. The sun will set in 5.2 h. What average speed must you walk to get to camp at sunset? Answer in units of km/h.

**Science**

Describe circular motion. Which of Newton's laws helped you describe circular motion Plz I need help fast, thx!!

**Physics**

In a perfectly insulating container, what is the equilibrium state (temperature and phases) if one mixes 475 g of water vapor at 140 degrees Celsius with 25 g of ice at 0 degrees Celsius?

**physics**

Two blocks are arranged at the ends of a massless string as shown in the figure. The system starts from rest. When the 4.01 kg mass has fallen through 0.412 m, its downward speed is 1.3 m/s. The acceleration of gravity is 9.8 m/s 2 .

**physics**

What is the frictional force between the 5.66 kg mass and the table? Answer in units of N.

**physics**

What is the magnitude of F? Assume the acceleration due to gravity is 9.8 m/s 2 and the surface is frictionless. Answer in units of N.

**physics**

A load of 66 N attached to a spring hanging vertically stretches the spring 8.3 cm. The spring is now placed horizontally on a table and stretched 11 cm. What force is required to stretch it by this amount? Answer in units of N.

**physics**

The acceleration of gravity is 10 m/s2. What is the acceleration of a 46 kg pail of cement that is pulled upward (not sideways) with a force of 478 N? Answer in units of m/s2.

**physics**

On planet X, an object weighs 18.1 N. On planet B where the magnitude of the free-fall acceleration is 1.28 g (where g = 9.8 m/s 2 is the gravitational acceleration on Earth), the object weighs 37.9 N. The acceleration of gravity is 9.8 m/s 2 . What is the mass of the object ...

**AP Chemistry**

The reaction of 5.1 grams of fluorine with excess chlorine produced 4.5 grams of ClF3. What percent yield of ClF3 was obtained? Answer in unites of %

**math**

The diagonal of a rectangular storage room is 4 yards long. If its length is 2 times its width, find the dimensions of the room.

**physics**

Your car is stuck in a mud hole. You are alone but you have a long strong rope. having studied physics you tie the rope tautly to a telephone pole and pull on it sideways at the midpoint as shown. Find the force exerted by the rope on the car when the anle is 3.2 and you are ...

**physics**

The distance between two telephone poles is 31 m. When a 1.54kg bird lands on the telephone wire midway between the poles, the wire sags 0.165 m. The acceleration of gravity is 9.8 m/s^2. How much tension in the wire does the bird produce? Ignore the weight of the wire.

**Chem**

Sapling wanted the two's

**Science**

Anon is 100% correct.

**Physics**

The 1.1 kg physics book is connected by a string to a 250 g coffee cup. The book is given a push up the slope and released with a speed of 2.9 m/s . The coefficients of friction are μs =0.50 and μk =0.20. What Distance does it travel up the slope? I drew a free body ...

**Shalee ^~^**

Thanks bruh, I got 100%!

**physics**

A 57.5-kg runner has a speed of 5.80 m/s at one instant during a long-distance event. (a) What is the runner's kinetic energy at this instant? 967.15 J (b) If he doubles his speed to reach the finish line, by what factor does his kinetic energy change? im having trouble ...

**English**

What are the differences between mood and tone?

**Social Stuides**

What is one way that the United Nations shapes world affairs

**Social Stuides**

Write at least one way that the United States has influenced another nation-state and at least one way that another nation-state has influenced the United States.

**physics**

A knight sits on a castle wall during a siege.To while away the time, he notes that boulders catapulted from below land on the top of his wall with a vertical velocity of 9.9 m/s. If he is 35 m above the catapult, what is the initial velocity of the boulders? Theacceleration ...

**physics**

A ball is thrown straight up and reaches a maximum height of 7.16 m. What was its initial speed? The acceleration of gravity is 9.8 m/s Answer in units of m/s.

**4th grade math word problem**

tim is 27 years older than tom. the sum of their ages is 337. how old is ti,?

**Biology**

The answer is waters high specific heat. the specific heat is a measure of how well a substance resists increasing temperature. the higher the number, the better it is at resisting that heat. So on a hot day, the water wont just cook the fish

**heith**

Shirley has two containers of water for a camping trip. One container holds 2 times as much as the other. The total amount of water is 30 gallons. How much water is in each container?

**Social Studies**

The Canadian Shield

**science**

A ball with a mass of 3.47 kg is rolling along at 17.4 m/s. If you apply a force of 52.2 N to it, how many seconds will it take to stop?

**chemistry**

How many grams of solid ammonium chloride should be added to 1.50 L of a 0.224 M ammonia solution to prepare a buffer with a pH of 8.720 ?

**College Algebra**

A rectangular garden next to a building is to be fenced on three sides. Fencing for the side parallel to the building costs $60 per foot, and material for the other two sides costs $20 per foot. If $1,500 is to be spent on fencing, what are the dimensions of the garden with ...

**Algebra 2**

solve 3 square root 2x +1 =3 2x +1 under the sqaure

**Algebra 2**

solve square root 5-2x + 5 =12 5-2x under the sqaure

**Algebra 2**

solve square root 2x-5 =7 the 2x -5 is under the sqaure

**math**

A store sells one model of bicycle for $250. a. Write an expression for the amount of money the store receives if it sells b bicycles. b. How much would the store make if it sells 5 bicycles.

**Algebra 2**

divide using long division. (6x^2+4x-16)/(2x-2)

**Algebra 2**

solve each equation. x^4-81=0

**Algebra 2**

find the real solutions of each equation by graphing. 15x^4=11x^3+14x^2

**Algebra 2**

find the real solutions of each equation by graphing. 2x^4=9x^2-4

**social studies**

CDC thanks

**Algebra 2**

Solve each equation. x^4 -x=0 x^4-81=0

**Algebra 2**

find the real solutions of each equation by graphing. 2x^4=9x^2-4 15x^4=11x^3 + 14x^2

**Physics**

A projectile is launched at 5.4 m/s with an initial angle of 22 degrees from an initial height of 2.6 meters. Where will it land? How fast, and at what angle will it be going when it hits the ground?

**Chemistry**

Draw the Lewis structure for each of these molecules. 1. PH3 2. H2S 3. HCl 4. CCl4 5. SiH4

**Chemistry**

A quantity of ice at 0.0 °C was added to 33.6 g of water at 45.0 °C to give water at 0.0 °C. How much ice was added? The heat of fusion of water is 6.01 kJ/mol, and the specific heat is 4.18 J/(g•°C).

**physics**

LNAJNDWAD

**Algebra 2**

thanks

**Algebra 2**

find the factored forms of each expression. -9x^2 - 100

**Algebra 2**

suppose y varies directly with x and y=1 when x= -3. what is the constant of variation? what is x when y=4?

**Algebra 2**

what are the x and y intercepts of 2x +4y =8?

**Algebra 2**

find the slope of each line. a. y= 2x-3 b. 3y=7x =1

**Algebra 2**

write the compound inequality 3.1 less then or equal to m less than or equal 4.7 as an absolute value inequality.

**Algebra 2**

solve ax -3x + 5 = a+b for x. state any restrictions on the variables.

**Algebra 2**

thanks

**Algebra 2**

write an equation to solve the problem. find three consecutive even numbers whose sum is 144

**Algebra 2**

yes that's the equation

**Algebra 2**

write each function in vertex form f(x) =-2x^2 =6x + 10

**Algebra 2**

what is the positive solution of the equation 1/2x^2 -3x =5? solve by using a table or by graphing. if necessary, round your answer to the nearest hundredth.

**Algebra 2**

what is the positive solution of the equation 3x^2 - 5x - 7 =0? solve by using a table or by graphing. if necessary, round your answer to the nearest hundredth.

**Algebra 2**

what is the positive solution of the equation x^2 - 3x = 1? solve by using a table or by graphing. if necessary, round your answer to the nearest hundredth.