09/03/19

Adding Carbon to Thermite?
A few years ago I tried burning thermite with my grandpa and it worked well, however the iron we got wasn't pure at all, making it impossible to forge. I would like to try again, and I think the... more
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09/02/19

A 1.547 g sample of hydrate CuSo4 is heated to drive off the water. The hydrate crystals that are left behind have a mass of .989 g. Find X in the following formula

CuSo4*XH2O Please help
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09/02/19

Mercury and bromine react with each other to produce mercury to bromid Mercury and bro mine will react with each other to produce mercury(ll) bromide

Hg(l)+Br2(l)——->HgBr2(s)a) what mass of HgBr2 can be produced from the reaction of 10g Hg and 9g of Br2
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09/01/19

What is the minimum frequency of light needed to emit electron from titanium?
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09/01/19

How much energy (in J) is lost when a sample of iron with a mass of 27.9 g cools from 78.0 C to 23.0 C ? Express tour answer with the appropriate units. Answer Boxes shows as : Value = Units=
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09/01/19

What volume of CO2 may be prepared from 5.00 lb CaCO3
CaCO3——-> CaO+CO2(STP)
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09/01/19

What is the freezing point of an benzene solution that boils at 81.02 degrees C? Normal freezing point is 5.5 and the normal boiling point is 80.1 degrees C. Kfp = 5.12 K/m and Kbp = 2.53 K/m.
What is the freezing point of an benzene solution that boils at 81.02 degrees C? Normal freezing point is 5.5 and the normal boiling point is 80.1 degrees C.Kfp = 5.12 K/m and Kbp = 2.53... more
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09/01/19

Which of the following is more soluble in water, methanol or CBr2H2(l).

How do I figure this out? Is there an equation or is this just basic chemistry knowledge?
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09/01/19

Consider the solutions, 0.04 m urea [(NH2)2C=O)], 0.04 m AgNO3 and 0.04 m CaCl2. Which has (i) the highest osmotic pressure, (ii) the lowest vapor pressure, (iii) the highest boiling point?
Consider the solutions, 0.04 m urea [(NH2)2C=O)], 0.04 m AgNO3 and 0.04 m CaCl2. Which has (i) the highest osmotic pressure, (ii) the lowest vapor pressure, (iii) the highest boiling point?Is there... more
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08/31/19

What is the formula and answer? I don’t know the formula or how to solve this equation

Duncan knows that it takes 36400 cal of energy to heat a pint of water from room temperature to boiling. However, Duncan has prepared Ramen noodles so many times he does not need to measure the... more
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08/31/19

Do the math, with appropriate significant figures: 1308000-2140=?
Can someone please help me solve this.
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08/30/19

question below with explaination
Which of the following is a strong electrolyte? a. HC2H3O2 b. NaNO3 :c. Cu(OH)2 d. CO2
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08/30/19

question and answer below
How many grams of (NH4)2SO4 are needed to create 750 mL of 0.1 M ammonium sulfate? a. 9.9 g b. 99 g c. 7.5 g d. 0.99 g
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08/30/19

question below with answers
What volume (in milliliters) of 2.50 M lead (II) nitrate solution contains 0.0500 moles of Pb2+ ions? a. .02 mL b. .04 mL c. 20 mL d. 40 mL
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08/30/19

the question is below
A white solid is dissolved in water until the solution is homogenous. A conductivity meter was then inserted into the solution resulting in the light bulb illuminating. Which of the following is... more
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08/30/19

What is the mechanism behind “acquired” alcohol tolerance?
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08/30/19

question in the description below
If you were to draw diagrams representing aqueous solutions of each of the following ionic compounds, how many anions would you show if each diagram contained six cations? Enter your answers as... more
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08/30/19

A 1.0 M solution of which of the following would contain the most ions? a. Na3PO4 b. KCl , c. NaNO3
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08/30/19

Solving for Reactant using chemical equation
Wine goes bad soon after opening because the ethanol CH3CH2OH in it reacts with oxygen gas O2 from the air to form water H20 and acetic acid CH3COOH the main ingredient of vinegar. What mass of... more
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08/30/19

Mass of cylinder and 2.00 mL water

it say i need check how many decimal point should be place
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08/29/19

A Math Problem About Pools
A pool is 32.3 m long and 23 m wide. If the average depth of water is 7.5 ft, what is the mass of water (in kg) in the pool?
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08/29/19

Composition Stoichiometry
How can I find the mass of each element that is present in ! mole of the compound of C2H6 ?
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08/29/19

2. About two centuries ago, Benjamin Franklin showed that one teaspoon of oil would cover the surface of about 0.50 acre of still water. The ‘acre’ is a unit of area.
Calculate the thickness (in ‘nm’) of the layer of oil that is spread over the 0.50 acre area. (Given: 1 km=0.6214 mi ; 640 acres=1 mi2 ; 1 teaspoon=5.0 cm3)
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08/28/19

How many milliliters of gasoline have a mass of 1.0 kg (D=0.74g/mL)?
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08/27/19

The average weight of the 2006 starting four defensive linemen of the Jacksonville Jaguars is 297 pounds. What is this weight in kilograms?

I have the answer key so I know the answer but I don't know how to get there. For one, my teacher came up with his own conversion factor which I am struggling with. For example, he has the... more
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