JACQUES D.

12/09/21

I need help with this stoichiometry on my homework

In the reaction below, how many molecules of PCl5 are required to react completely with 18 grams of water? PCl5 + 4H2O → 5HCl + H3PO4A. 1.5 x 1023B. 3.0 x 1023C. 6.0 x 1023D. 2.4 x... more

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Physics

12/08/21

How would i calculate m2 in a completely inelastic 2d collision?

Here is the question: Two ice skaters undergo a collision, after which their arms are intertwined, and they have a common velocity of 0.85 m/s [27° S of E]. Before the collision, one skater of mass... more

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Math Calculus

12/08/21

Solving systems using matrices

A small software corporation borrowed $470,000 to expand its software line. Some of the money was borrowed at 9%, some at 10%, and some at 12%. Use a system of equations to determine how much was... more

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Organic Chemistry

12/08/21

how many moles of butane are there in kg of propane

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Math Act Math Exponents

12/08/21

How many grains of rice are there in the box?? Pls answer

A grain of rice has a volume of 20-^10 m^3. A box of full of rice has a volume of 20-^3 m. How many grains of rice are there in the box??Questions: 1.) What did you notice from the values given in... more

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Physics

12/08/21

what are x and y supposed to be?

I got some advice on here about a question on projectile motion on a slanted surface, but I have no idea what the variables x or y are supposed to be. are they distance of x and distance of y? i am... more

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Trigonometry Pre Calculus

12/08/21

How do i solve this question

A biologist wants to know the width w of a river to properly set instruments for an experiment. From point A, the biologist walks downstream 100 feet and sights to point C (see figure). From this... more

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Chemistry

12/07/21

What is the configuration of the most stable ion that fluorine makes?

I know how to write the electron configuration of fluorine and I know What the most stable ion for fluorine is but I have no idea how to write the configuration for that.

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Probability

12/07/21

If A and B are events such that P(A)=1/2, P(B)=1/3 and P(AuB)=2/3. Find P(B'/A)

Anyone know probability, I'm really stuck on this one..... I need help

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Precalculus

12/07/21

A certain ball bounces to 2/3 of the height it fell from. If this ball is initially dropped from 27 feet, approximate the total distance the ball travels.

i dunno how to answer that

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Physics

12/07/21

how would i solve to find the distance and time it takes for a projectile to hit an incline plane?

Hi so I have a question. It relates to projectile motion on an incline ramp. it goes as follows: A projectile is launched from point O at an angle of 22 degrees with an initial velocity of 25m/s up... more

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Algebra 2

12/06/21

What are the steps to find the first five terms and the term named in the problem?

I’m horrible with fractions and don’t understand the steps to reach the correct answers. Trying to understand so I can make sure my son understands.an = 11/8 + 1/2nFind a23

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Chemistry

12/06/21

Chemistry: Molarity and Solution Stoichiometry

2HCl(aq)+Na2CO3(aq)→2NaCl(aq)+H2O(l)+CO2(g)What volume of 3.00 M HCl in liters is needed to react completely (with nothing left over) with 0.750 L of 0.300 M Na2CO3? I'm struggling with how to... more

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Answers •1

Physics Mechanics Physics C

12/04/21

Basic Newtons Laws problem

Force F is applied to the front block (as shown below) in order for all three blocks to move at a constant velocity. All horizontal surfaces have a coefficient of friction of µ. What is the ratio... more

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Answers •1

Math Chemistry Mathematics

12/04/21

need help with chem question

What volume of 6.0 M acid is required for the preparation of 500.0 mL of 0.30 M solution?

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Answers •1

Chemistry

12/03/21

using heat or vaporization to find heat

Calculate the amount of heat needed to boil 63.8g of hexane (C6H14), beginning from a temperature of 4.0°C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit... more

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Answers •1

Calculus Electrical Engineering Mechanical Engineering

12/03/21

How to solve this by chain rule?

If z=f(x,y), where x=rcosθ and y=rsinθ, show that∂2z /∂x2+ ∂2z /∂y2= ∂2z/∂r2 + 1/r2. ∂2z/∂θ2 + 1/r . ∂z/∂r

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Chemistry

12/03/21

Write the net ionic equation for any reaction that may be predicted when aqueous solutions of sodium hydroxide and barium nitrate are combined.

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Chemistry

12/03/21

How much energy is required to melt 253 g of ice into liquid water at 0 ∘C? The heat of fusion for water is 333.6 J/g.

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Answers •1

Chemistry

12/02/21

using avagardos law

Hydrogen gas and nitrogen gas react to form ammonia gas. What volume of ammonia would be produced by this reaction if 9.78 cm3 of nitrogen were consumed? Also, be sure your answer has a unit... more

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Geometry Algebra

12/02/21

Factor the expression

-8x^2+22x-15answer choices a (2x+3)(5-4x)B (2x-3)(5-4x)c(4x+5)(2x-3)d(3-2x)(5-4x)

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Answers •2

Precalculus

12/02/21

Find the distance between city A and city C. (Law of Cousines)

The bearing from city A to city B is S E and the bearing from city B to city C is N E. (See picture below where and . Click on the picture to see it more clearly).It takes 1.6 hours for a car... more

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Pre Calculus

11/30/21

Find the polynomial function f with real coefficients that has the given degree, zeros, and solution point. Degree 3 Zeros. −4, 1 + 3 i Solution Point 3 f(−2) = 24 f(x) =

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Answers •3

Chemistry

11/30/21

What is the mass (in g) of Ca (40.1 g/mol) that will theoretically be produced?

A constant current of 10 amps is passed through an electrolytic cell containing molten CaCI2 for 12 hours.Cathode: Ca2+ + 2e- --> CaAnode: 2Cl- --> Cl2 + 2e-

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Chemistry

11/30/21

What is K for a reaction if ∆G° =150.8 kJ/mol at 25.0 °C?

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I need help with this stoichiometry on my homework

How would i calculate m2 in a completely inelastic 2d collision?

Solving systems using matrices

how many moles of butane are there in kg of propane

How many grains of rice are there in the box?? Pls answer

what are x and y supposed to be?

How do i solve this question

What is the configuration of the most stable ion that fluorine makes?

If A and B are events such that P(A)=1/2, P(B)=1/3 and P(AuB)=2/3. Find P(B'/A)

A certain ball bounces to 2/3 of the height it fell from. If this ball is initially dropped from 27 feet, approximate the total distance the ball travels.

how would i solve to find the distance and time it takes for a projectile to hit an incline plane?

What are the steps to find the first five terms and the term named in the problem?

Chemistry: Molarity and Solution Stoichiometry

Basic Newtons Laws problem

need help with chem question

using heat or vaporization to find heat

How to solve this by chain rule?

Write the net ionic equation for any reaction that may be predicted when aqueous solutions of sodium hydroxide and barium nitrate are combined.

How much energy is required to melt 253 g of ice into liquid water at 0 ∘C? The heat of fusion for water is 333.6 J/g.

using avagardos law

Factor the expression

Find the distance between city A and city C. (Law of Cousines)

Find the polynomial function f with real coefficients that has the given degree, zeros, and solution point. Degree 3 Zeros. −4, 1 + 3 i Solution Point 3 f(−2) = 24 f(x) =

What is the mass (in g) of Ca (40.1 g/mol) that will theoretically be produced?

What is K for a reaction if ∆G° =150.8 kJ/mol at 25.0 °C?

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