11/24/19

A coffee cup has a heat capacity of 62.6J∘C. If the coffee cup's temperature increases by 1.20∘C, how much heat has it absorbed?
Round your answer to the nearest tenth.
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11/24/19

An unknown metal absorbs 23.8J of heat, and its temperature increases by 15.4∘C. What is the heat capacity of the metal?
Round your answer to two decimal places.
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11/24/19

Calculate [H + ] and [OH − ] for each solution at 25°C. Identify each solution as neutral, acidic, or basic.
Calculate [H+ ] and [OH− ] for each solution at 25°C. Identify each solution as neutral, acidic, or basic.pH= 15.4[H+]=[OH-]=pOH= 9.34[H+]=[OH-]=pOH=5.4[H+]=[OH-]=
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11/24/19

Calculate the pH of 4.9 ✕ 10−5 M boric acid (Ka = 5.8 ✕ 10−10).
I do not know how to create the equation or use the Ka. Please help me. :(
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11/24/19

Calculate the pH of a 0.103 M solution of CsHSO4.
Please help. I really do not know where to start.
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11/24/19

Consider the following balanced reaction. HCl (aq) + KOH (aq) → H2O (l) + KCl (aq)

In a beaker, 250.0 mL of 0.25 M HCl and 200.0 mL of 0.40 M KOH are mixed. After reaction, is the solution acidic, neutral, or basic? What is the pH of the solution at the end of the... more
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11/24/19

Calculate the pH of a 0.0065 M solution of NaOH. Report answer to two decimal places.
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11/24/19

Can someone check my work

Write the two geometric isomers of the alkene having the molecular formula C3H4Cl2.CH2Cl-C=CHCl trans-1,3-dichloroprop-1-eneCH2Cl-C=CHCl cis-1,3-dichloroprop-1-ene 
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11/24/19

Name the following compounds

can someone help me check my workA. CH3 | CH3-CH-CH=C-CH3 | CH2CH3B. CH3(CH2)5CH-C(triple bond)CH ... more
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11/24/19

I just need to know if I'm in the right route
So I need to name and draw the 18 isomers for C8H18 I just need to know I am doing them right so far I haveCH3CH2CH2CH2CH2CH2CH2CH3 OCTANECH3CH2-CH-CH2CH2CH2CH3 | ... more
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11/23/19

Explain how Beer-Lambert law is used in spectroscopy?
How would i use the principle behind Beer Lambert and the equation to explain this?
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11/23/19

Determine the number of grams of the specified element using the percent composition
Based on the percent composition information obtained in problem number 11, determine the number of grams of the specified element contained in each of the followingA) NaCl***the percent was 39.6%***
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11/23/19

General Chemistry

What amount of energy is required to change a spherical drop of water with a diameter of 2.20 mm to four smaller spherical drops of equal size? The surface tension, γ , of water at room temperature... more
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11/23/19

General Chemistry

The charges and sizes of the ions in an ionic compound affect the strength of the electrostatic attraction holding that compound together.Based on ion charges and relative ion sizes, arrange these... more
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11/22/19

Chemistry Final Temp
A 356.6 g piece of gold (Cp=25.42 J/mol °C) was heated to a temperature of -23.4 °C and then placed in contact with a 1057 g piece of uranium at 78.2 °C (Cp=27.67 J/mol °C). What is the final... more
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11/22/19

How many milliliters of a 0.197 M HCl solution are needed to neutralize 319 mL of a 0.0335 M Ba(OH)2 solution?

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11/22/19

What is the limiting reactant

What reactant is limiting if 4.52 g of ammonium nitrate and 3.87 grams of sodium hydroxide are used?
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11/22/19

What is the Lewis dot structure for PO4 3-?

I'm confused because when I draw all of the Os attached with single bonds to P the formal charges don't make sense. But when I add a double bond to one of the Os the formal charges are -1 to 3 of... more
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11/22/19

Chemistry question, Please help!
a piece of iron is placed in a solution of Cu(NO3)2 and copper plates out on the iron, similarly when the iron is places in a solution of AgNO3, silver plates out on the iron. When a piece of... more
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11/22/19

how large will the bubble get at the final temperature of 300K
A large piece of dry ice at –-23 0C is placed into a glass vessel partially filled with warm water. Bubble solution is suspended over the opening of the vessel. As the dry ice boils, carbon dioxide... more
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11/22/19

Can someone help me I’m stumped
So I’m just missing in naming this four compounds, and I’ve gotten them wrong in all my tries.1- CH3CH2CHCH3 | CH2CH3 CH3 |2-... more
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11/21/19

What is the wavelength of an electron with a mass of 9.11*10^-31 kg moving at a speed of 3*10^6 m/s?
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11/21/19

maddie experimented with a gas sample. she found it contains 39.10% carbon, 7.67% hydrogen, 26.11% oxygen, 16.82% phosphorus, and 10.30% fluorine.

she also determined that the molecular mass is 184.1 g/mol. help maddie determine the molecular formula.plz help
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11/21/19

what is the empirical formula for a compound containing 26.57% potassium, 35.36% chromium, and 38.07% oxygen
i have no clue how this is done. plz help
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11/21/19

If you start with 85g of Nitrogen and isolate 86g of ammonia, what is your percent yield?
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