Paul K.

02/05/21

Systems of Equations Application Word Problems

The admission fee at an amusement park is 1.5 dollars for children and 4 dollars for adults. On a certain day, 210 people entered the park, and the admission fees collected totaled 590 dollars. How... more

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Science Chemistry Organic Chemistry

01/30/21

i need help please

Question 1: S + 6 HNO3 --> H2SO4 + 6 NO2 + 2 H2OIn the above equation how many moles of H2SO4 can be made when 10 moles of HNO3 are consumed?Question 2: Sodium chlorate decomposes... more

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Chemistry

01/19/21

How many grams of Li3N are produced when 25 grams of N2 react with excess Li?

Balanced form: 6 Li + N2 = 2 Li3N

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Geometry

11/16/20

This Is A World Problem

One angle in an isosceles triangle is six times as large as the two congrurnt angles in the triangle. What is the measure of each angle in the triangle?

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Chemistry

11/16/20

Which of the following statements about the molecular orbitals for a diatomic molecule with 2s and 2p orbitals is or are true?

Which of the following statements about the molecular orbitals for a diatomic molecule with 2s and 2p orbitals is or are true?I. The σ*2p molecular orbital is higher in energy than a π*2p molecular... more

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Physics

11/16/20

Physics Conservation of Energy Problem Solving

A marble launcher is set up to launch marbles in the horizontal direction. It has a spring constant of 190 N/m and a marble of mass 0.0059 kg is loaded and compresses the spring 0.071 m. What is... more

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Chemistry Organic Chemistry

11/15/20

Organic Chemistry

I am stuck on these questions- I cant seem to wrap my head around stereoselective and stereospecific. I have to describe my answers to each and I have drawn out some of the reactions but I am... more

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Chemistry

11/14/20

chemistry question

Sodium hydroxide is extremely soluble in water. At a certain temperature, a saturated solution contains 563 g NaOH(s) per liter of solution. Calculate the molarity of this saturated NaOH(aq) ... more

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Chemistry

11/10/20

Determine the molar mass for As4O10.

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Prealgebra

11/05/20

Need Help please

Of 5,721 people attending an outdoor concert in Los Angeles, 5,003 are over 18 years of age. What percent is this? (Round to the nearest whole-number percent.)

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Chemistry

11/04/20

trontium-90 has a life of 29 days. If a sample that originally had 1000 grams of Strontium-90 has decayed to 15 grams. APPROXIMATELY how old is the sample?

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Geometry

11/04/20

Which choice shows three lengths that cannot be the lengths of the three sides of a triangle

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Chemistry

11/04/20

Need help with this question :)

A chemical reaction produces 456 mL of nitrogen dioxide (NO2) gas at STP. What is the mass of the gass produced?

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Science Chemistry Gas Laws

11/03/20

How many grams of pentane are fully combusted by 82.9 L of oxygen at STP

How many grams of pentane are fully combusted by 82.9 L of oxygen at STP (0 degrees C, 1 Atm)?C5H12 + 8O2 ----> 5CO2 + 6H2O

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Calculus Graph Minimum

11/03/20

Calculus Please Help ASAP! Find the x-value where f attains its absolute minimum value on the closed interval from x = -2 to x = 6.

The figure below shows the graph of f ', the derivative of the function f, on the closed interval from x = -2 to x = 6. The graph of the derivative has horizontal tangent lines at x = 2 and x =... more

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Chemistry

11/03/20

Need help with this questions

1.) A certain volume of a gas had a pressure of 800 torr at a temperature of -40 degrees celsius. What was the original volume at STP is now 450.0 cm3?2.) Hydrogen is collected by water... more

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Algebra 2

11/01/20

Exponential from 2 points

Write an exponential function in the form y=ab^x that goes through points (0,9)and (10,9216)

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Chemistry

11/01/20

In a titration of 25.00 mL of A solution, 32.55 mL of 0.7859 M B solution are required to reach the end-point. What is the concentration of the 25.00 mL of A?

A + 2B → 2C + D

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