03/17/21

If 4.11 grams of iodine are reacted with 3.71 grams of H2S, the products are HI and sulfur. I2 + H2S --> 2HI + S What is the theoretical yield of HI?
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03/17/21

Chemistry reaction
A reaction of 52.3 g of Na and 36.5 g of Br 2 yields 40.5 g of NaBr. What is the percent yield? 2Na(s)+Br 2 (g) —> 2NaBr(s)
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03/16/21

We wish to maximize the volume, so we must now write an equation for the volume of the box
Recall that the volume of a box is given by V = lwh, where l = length, w = width, and h = height. We previously determined that l = 24 − 2x, w = 9 − 2x, and h = x. Use these expressions to write an... more
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03/16/21

Use linear approximation, i.e. the tangent line, to approximate √(36.4) as follows: Let f ( x ) = √ x . Find the equation of the tangent line to f( x ) at x = 36.
L(x)=__________Using this, we find our approximation for √(36.4) is_________________NOTE: For this part, give your answer to at least 9 significant figures or use an expression to give the exact... more
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03/16/21

Sodium nitrate when heated can decompose to form oxygen gas and sodium nitrite. What mass of sodium nitrate in grams is required to produce 32.8 g of oxygen.
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03/16/21

How many moles of NaCl (sodium chloride) will be produced from 71 grams of Cl2 (chlorine gas)? The balanced equation being: 2Na + Cl₂ → 2NaCl
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03/15/21

math precalculus
Which of the following has a period of 5?y = sin(2πx/5)none of thesey = sin5πxy sin(πx/5)
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03/15/21

For the reaction SO3 + H2O --> H2SO4, calculate the percent yield if 50g of water reacts with excess sulfur trioxide to produce 205g of hydrogen sulfate.
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03/15/21

For the reaction CH4 + 2O2 --> CO2 + 2H2O, how many moles of water are produced alongside 100g of carbon dioxide?
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03/15/21

chemistry help please
The temperature of a sample of fluorine gas is changed without changing its volume, causing a change in pressure from 46.0 kPa to 129.0 kPa. If the starting temperature was 225 °C, what is the... more
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03/15/21

Given: P1: 4.2162 atm, P2: 5.7166 atm, V2: 53.914L, T1: 681.53K, T2: 891.28K , Wanted: liters of CH4
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03/14/21

Calculate the horizontal component of the net force, in newtons, on the charge which lies at the lower left corner of the rectangle.

Four point charges of equal magnitude Q = 55 nC are placed on the corners of a rectangle of sides D1 = 21 cm and D2 = 11 cm. The charges on the left side of the rectangle are positive while the... more
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08/28/20

If the sun was scaled down to the size of a tennis ball what is the scale factor?
Diameter of Sun: 1,390,000,000,000 cmDiameter of Tennis Ball: 6.86 cmWhat is the scale factor? Like is it 1 cm = 1 million cm etc
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08/09/20

Torque question
A disk of mass 6 kg and radius 25 cm is rotating around horizontal axis that goes through its center with n=360 revolutions/min. When the disk was being stopped it stopped right after t=30 s.... more
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08/03/20

One hundred feet from the trunk of a tree on level ground, the angle of elevation of the top of the tree is 370. Estimate the height of the tree to the nearest foot.
One hundred feet from the trunk of a tree on level ground, the angle of elevation of the top of the tree is 370. Estimate the height of the tree to the nearest foot.
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08/03/20

A 500-foot weather towe
A 500-foot weather tower used to measure wind speed has a guy wire attached to it 200 feet above the ground. The angle between the wire and the vertical tower is 470. Approximate the length of the... more
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08/03/20

How would you solve this equation for b in terms of c?
How would you solve this equation for b in terms of c?1700b(sin(14b/3 + c)) + 68cos(14b/3 + c) - (10625b^2)(cos(14b/3 + c) = 0
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08/01/20

A ball on a spring is pulled 6 inches below its rest position and then released. After t seconds, the ball's distance, d, in inches from its rest position is given by the equation below. d=−6cosπ/3t

Find all values of t for which the ball is 3 inches above its rest position. >>Give a general formula for all the solutions by adding multiples of some positive integer n.
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07/31/20

physics circuit question
In a parallel circuit, the voltage drop across bulb A is 40.0 V and the voltage drop across bulb C is 15.0 V. Current provided by the battery is 5.0 A and current flowing through bulb B is 3.0... more
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07/28/20

Suppose Q=95x11^-t State the staring value A growth factor b and growth/decay rate r
Wouldn't it be a=95 b=11 r -t
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07/28/20

Physics Energy Question

A ray of light strikes a side of lucite ( = 1.50) prism at 40° as shown below. Find the angle that the light leaves the prism.The prism is a isosceles with a degree of 70 at the top.
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07/27/20

A ray of light strikes a side of a Lucite prism (n = 1.50) at an incident angle of 40.0° as shown in the diagram. Find the angle (labelled with ?) that the light leaves the prism
A ray of light strikes a side of a Lucite prism (n = 1.50) at an incident angle of 40.0° as shown in the diagram. Find the angle (labelled with ?) that the light leaves the prismdiagram:... more
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07/27/20

Exponential Functions 29
Find the amount of money (Future Value) in an account where $6,500 is deposited (Present Value) at an interest rate of 3% per year compounded continuously and the money is left in the account for... more
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07/26/20

As seen from Earth, which planets in the Solar System have a wide range of phases? Please explain the reason.
As seen from Earth, which planets in the Solar System have a wide range of phases? Please explain the reason.
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07/26/20

How to do this ?
From Earth, we are unable to observe the Full Venus (Venus equivalent of the Full Moon). Why? Please explain the reason.
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