2d

Consider the following reaction.
2Fe2O3(s)+3C(s)heat−−→4Fe(s)+3CO2(g)Calculate the number of grams of Fe2O3 needed to react with 20.0 g C.
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2d

Small quantities of oxygen can be prepared in the laboratory by heating potassium chlorate, KClO3(s).
The equation for the reaction is2KClO3⟶2KCl+3O2Calculate how many grams of O2(g) can be produced from heating 19.1 g KClO3(s).
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2d

Consider the combustion reaction for octane (C8H18) , which is a primary component of gasoline.
2C8H18+25O2⟶16CO2+18H2OHow many moles of CO2 are emitted into the atmosphere when 19.6 g C8H18 is burned?
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2d

Determine P(5 ≤ X ≤ 8)
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2d

Determine P(5 ≤ X < 8)
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2d

Translating inequalities

The difference of 8 and six times a number is a minimum of sixty-eight
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2d

How do you get All Four Points on your English SAT?
How do you get All Four Points on your English SAT?
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2d

EXPECTED VALUE GAMBLING WHEEL QUESTION
Suppose you bet $1 on red at the roulette wheel. There are 18 red numbers and 20 nonred numbers (including the green 0 and 00). You win $1 if a red number comes up, and you lose $1 if any other... more
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2d

trig need help, with one last equation in my problem
If sinx=49, x in quadrant I, then find (without finding x)sin(2x)= 2(4/9)(sqrt(65)/9)cos(2x)= 1-2(4/9)^2tan(2x) = ?
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2d

A projectile is shot upward from the surface of Earth with initial velocity of 116 meters per second. Use the position function below. What is its velocity after 2 seconds? After 10 seconds?
s(t) = −4.9t2 + v0t + s02s:____m/s10s:___m/s
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2d

Find the average rate of change of the function over the given interval.
f(t) = 4t2 − 5,      [3, 3.1]Compare this average rate of change with the instantaneous rates of change at the endpoints of the interval.left endpoint:right endpoint:
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2d

Find k such that the line is tangent to the graph of the function.
Function: f(x)= kx Line: y=4x+4
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2d

Find the probability
There are 25 red marbles, 15 green marbles, and 10 blue marbles.You randomly pick 4 from the bag.What is the probability of picking at least 1 marble of each color?
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2d

Ben had 2 apples. He gave one away to John. How many apples does he have left?
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2d

Geometry Homework

Important!With the following points: E(-3,5),F(6,2),G(4,-4), H(-5,-1)Find the perimeter and area of rectangle EFGH.
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2d

Angle measurements
Complimentary Angles= 90 degreesSupplementary Angles= 180Congruent Angles= both measure the sameVertical Angles= ?Adjacent Angles= ?Could you please answer my question marks?
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2d

5 is 5% of what number?
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2d

Find all values of theta​, if theta is in the interval ​[0 degrees​, 360 degrees​) and has the given function value. sec theta equals negative 2 Root 3 Over 3

(-2 sqrt3)/3
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2d

How to write Z over 8 -9 as a word phrase

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2d

How to write 49 + m as a word phrase

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2d

find the missing number to complete the porportion
4 apartments on 1 floor=_______ Apartments on 5 floors
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2d

(solve a system of equations)

There are 26 students in Mrs.Anderson's class. there are two more boys than girls. How many of each are in Mrs.Anderson's class
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2d

How long till the ball reaches its highest point
An elementary student kicks a ball straight into the air with a velocity of 16 feet/sec. If acceleration due to gravity is -32 ft/sec2, how many seconds after it leaves his foot will it take the... more
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2d

Find the displacement
For an object whose velocity in ft/sec is given by v(t) = -t2 + 4, what is its displacement, in feet, on the interval t = 0 to t = 3 secs?Question... more
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2d

Find the distance
Find the distance, in feet, a particle travels in its first 4 seconds of travel, if it moves according to the velocity equation v(t)= -t2 + 4 (in feet/sec). Question... more
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