01/30/23

This is a HW question where I don’t get it
A miner goes digging for gold and collected 2000.0 pounds of material. The material collected is found to be 15.6 % gold by mass). How many g of gold was collected? Recall that % mass is defined as... more
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01/28/23

What is the median IQ score for this sample? 99, 100, 105, 104, 102, 105, 105, 121, 104
IQ scores are collected from a sample of students at a large university. The scores are shown below.A. 102B.104C.105D.110
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01/28/23

freezing point of glycerine in water
2-8. What mass of glycerin (C3H8O3), a nonelectrolyte, must be dissolved in 200g H2O to give a solution with a freezing point Tf=-1.50oC？(For C3H8O3, molar mass =92g/mol, and the Kf for... more
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01/27/23

Six different colored dice are rolled. Of interest is the number of dice that show a one.Find the probability that all six dice show a one.
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01/27/23

he average number of children a Japanese woman has in her lifetime is 1.37. Suppose that one Japanese woman is randomly chosen.
Find the probability that she has no children.Find the probability that she has fewer children than the Japanese average.Find the probability that she has more children than the Japanese average. 
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01/27/23

Six different colored dice are rolled. Of interest is the number of dice that show a one.Find the probability that all six dice show a one.
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01/27/23

An elevator lifts 5 passengers 30 meters in 24 seconds. The power is 15,000 watts. What is the total weight of the elevator and passengers
i am in 8th grade and need semi-simple terms please.
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01/27/23

What is the maximum concentration of Ag⁺ that can be added to a 0.00640 M solution of Na₂CO₃ before a precipitate will form? (Ksp for Ag₂CO₃ is 8.10 × 10⁻¹²)
What is the maximum concentration of Ag⁺ that can be added to a 0.00640 M solution of Na₂CO₃ before a precipitate will form? (Ksp for Ag₂CO₃ is 8.10 × 10⁻¹²)
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01/27/23

Field strength from rod

+6.40 nC of charge is uniformly distributed along the left half of a thin rod of total length L = 4.00 m, while -6.40 nC of charge is uniformly distributed along the right half of the rod. What is... more
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01/26/23

a cylindrical can, open at the top, is to hold 800 cm cubed of liquid. find the height, h, and the radius, r, that minimize the amount of material needed to manufacture the can
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01/26/23

Conversion Factor

If your car gets 25 miles per gallon, what is it in kilometers per liter? 1 mile = 1.609 km and 1 gallon = 3.785 L. Select the best answer.a) 100.6 km/Lb) 11 km/L
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01/26/23

Find the volume of the solid obtained by rotating the region bounded by y=x and y=√x about the line x=3
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01/25/23

What will separate first at the cathode and what at the anode during molten electrolysis a mixture of NaCl and CaBr2.
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01/25/23

Mass of each component
In a 65.0-g aqueous solution of methanol, CH4O, the mole fraction of methanol is 0.210.What is the mass of each component?
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01/25/23

Does a reaction occur when aqueous solutions of potassium hydroxide and chromium(III) sulfate are combined? If so, what is the net ionic equation
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01/25/23

dose a straw have 2 holes or dose it just have 1?
I have been conflicted by this question and it seems I never get the same answer. please help someone
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01/22/23

Fermi Problems Solving
Estimate the mass of food and water that a team of six astronauts would need for a standard two-year mission to Mars. (Note: the two years includes the round trip.)
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01/21/23

I'm confused on the 6+z question and the x seconds question
When running a 100-meter race Jeremy reaches his maximum speed 6 seconds after the race started when he is 40 meters from the starting line. Jeremy runs at this max speed for the rest of the race.... more
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01/20/23

Given the piecewise continuous funtion
{ e3t, 0≤t<1f(t)= {t-1, 1≤t‹2 { 1, t≥2Express f(t)) in terms step function and find L{f(t)}
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01/20/23

what are the mean and variance of the hypergeometric distribution?
Calculate the mean and the variance of the hypergeometric distribution h(x;50,5,3).
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01/20/23

how to solve this type of poisson distribution
Suppose that the number of typing errors per page has a Poisson distribution with average 4 typing errors. What is the probability that in a given page the number of typing errors will at... more
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01/19/23

Im looking for help with my chem homework

Heptane and water do not mix, and heptane has a lower density (0.684 g/mL) than water (1.00 g/mL). A 100-mL graduated cylinder with an inside diameter of 3.04 cm contains 35.3 g of heptane... more
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01/19/23

how should i calculate the expected frequency of a fitted binomial distribution
An experiment is repeated 100 times and a fitted binomial distribution is obtained as follows:Calculate the Expected frequencies for the fitted binomial distribution.
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01/19/23

chemistry question
Chemistry mixes 108 g of H2O, with 186 L of NO2 at STP. How many grams of NO will be produced? The balanced equation for this reaction is: H2O + 3 NO2 🡪 2 HNO3 + NO
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01/19/23

Physica question
During the jump, the push-off force and gravity are important. The push-off force is the force of the ground on the volleyball player during the push-off.We neglect air resistance in this exercise.... more
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