05/19/21

A solution with a pOH of 4.3 has a [OH-] of _.
A solution with a pOH of 4.3 has a [OH-] of _.3.2 x 10-4 M1.0 x 10-4.3 M4.8 x 10-9 M5.0 x 10-5 M
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05/19/21

Determine what the period of revolution of the Earth would be if its distance from the Sun were 6.5 AU rather than 1 AU. Assume that the mass of the Sun remains the same.
answer should be in years
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05/19/21

Help me with my homework!
Asteroids are believed to be material that never collected into a planet. An asteroid has a period of 6.6 years. Assuming the asteroid to be at the center of the planet if it had formed, how far... more
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05/19/21

Calculate the period T of a planet whose orbit has a semimajor axis of 2.9 AU.
Answer should be in years.
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05/19/21

In 12.5g of Mg3(PO4)2 : how many total atoms & how many P atoms?
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05/19/21

How many moles of aluminum fluoride are made from this synthesis reaction?
How many moles of aluminum fluoride (AlF3) will be made from the synthesis reaction of solid aluminum and 34.78g fluorine gas?
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05/19/21

How many moles are in 2.58 g of silver nitrate? Part 2: How many molecules are in 2.58 g of silver nitrate?
I need help with figuring the moles and molecules like I get confused with the equations. Can someone help me out please.
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05/18/21

Let (-2,-3) be a point on the terminal side of θ. Find the exact values of cosθ, cscθ, and tanθ.
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05/18/21

What is the kinetic energy of an automobile with a mass of 1,007.98 kg traveling at a speed of 4.50 m/s?
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05/18/21

Chemistry question on limiting reactants

How many moles of black iron oxide (Fe3O4) can be produced from 9.2 moles of water and 3.4 moles of iron ? Which is the limiting reactant and how many moles of the excess reactant will be left... more
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05/18/21

Find the position and velocity of an object moving along a straight line with the given acceleration, initial velocity, and initial position.
a(t) = -32v(0) = 70s(0) = 10
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05/18/21

Calculate the measure of an angle in standard position whose terminal ray intersects the unit circle at (-0.59, 0.81 . Round the answer to the nearest degree.
A) 100 degreesB) 234 degreesC) 126 degreesD) 54 degrees
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05/18/21

Juan Soto hits a pitched ball at a 43 degree angle. It just clears the fence, 68 m away. What is the velocity when it left the bat. Assume the fence is the same height as the ball leaving Juan's bat.
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05/18/21

Solve this task.
Determine the mass of copper (I) sulfide which can be oxidized with 7.8 x 1023 oxygen molecules. Reaction products are copper (I) oxide and sulfur (IV) oxide.
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05/18/21

If 601 J of heat is available, what is the mass in grams of iron (specific heat = 0.450 J/g･°C) that can be heated from 22.5°C to 120.0°C?
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05/18/21

What quantity of heat (in kJ) would need to be removed to cool 202.3 g of water from 25.60°C to -10.70°C?
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05/18/21

How many moles are in 3.46 x 1023 molecules of astatine?

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05/18/21

How many grams are in 2.7 x 10^22 molecules of N2I6?
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05/17/21

then  the electric current at this point is ... A) 1.8 A B) 3.2 A C) 9 x 1044 A D) 6.9 X 1037 A

 If approximately 4.0 x 10 electrons pass a given point in a circuit every hour,
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05/17/21

Determine the current passing through each of the bulbs.  or the circuit shown below, each of the resistors represents a light bulb.

An old fashioned string of 80 Christmas lights is wired in series. Each bulb has a resistance of 2.0 Ohms and the entire string is plugged into a 120 V outlet. 
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05/17/21

I have a physics question

A train is crossing a bridge across a chasm. but the track has a hole in it. (No funding for infrastructure). If the train is 818 m above the ground and it lands 381 m from the edge of the chasm,... more
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05/17/21

Assume that the volume of a balloon filled with H2 is 1.00 L at 25.0°C.
Calculate the volume of the balloon when it is cooled to -78.0°C in a low-temperature bath made by adding dry ice to acetone.
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05/17/21

A sample of helium gas at 25.0°C is compressed from 200.0 cm3 to 0.24 cm3.
Its pressure is now 30.0 mmHg. What was the original pressure of the helium?  
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05/17/21

As a pilot is flying in level flight at 9,500 ft., the altimeter in the instrument panel is set to a pressure of 758 mm of Hg. As the aircraft travels along its route,
the outside air temperature changes from 15.0°C to 45.0°C. To what pressure does the pilot need to reset the altimeter in order for the altimeter to indicate the aircraft's true altitude?
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05/17/21

How many moles of nitrogen oxide are in a bag at 760 mmHg, 273 K, and has a volume of 1.0 liter?
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