02/02/21

A graduated cylinder is filled with water to a volume of 44.0 mL. When an irregularly shaped solid piece of metal was added, the volume increased to 47.2 mL. If the piece of metal had a mass of 45.5 g
what is the density of the metal?
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02/02/21

Which of the following relationships is incorrect?
I am really bad at this stuff. a) 10-6 milliliters = 1 literb) 1 microliter = 106 litersc) 1 gram = 10-3 kilogramsd) 100 centimeters = 1 meter
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02/02/21

How many significant figures does the result of the following operation have? 8.5201 + (1.932 x 5.45)
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02/02/21

Does [NO2]- have LDF?
Does [NO2]- have London dispersion forces?
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02/02/21

Please help me with this Chemistry question. How do substances go from one state of matter to another? (Discuss in terms of energy).
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02/02/21

What is the lewis structure for SNH?
What is the lewis structure for SNH?
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02/02/21

What is the lewis structure?
What is the lewis structure for (HO)Si(CH3)3? Is it polar and display any LDF?
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02/02/21

Chemistry math question

What is the density of lead if 72.3 g occupies 6.19 mL
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02/01/21

Super Saturated Fun Sheet
How many milliliters of water are needed to make 0.100 M solution using 10.5 g of silver nitrate?
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02/01/21

Super Saturated Fun Sheet
if you use 275 grams of sodium fluoride (NaF) and dissolve this into 3620 grams of water, what will be the change in the boiling point of your solution? Assume the Kb of water is 0.51 degrees/m
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02/01/21

Super Saturated Fun Sheet
if you use 975 grams of sucrose(C12H22O11) and dissolve this into 2500 grmans of water, what will be the change in the freezing point of your solution? The Kf of water is -1.86 degrees C/m.
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02/01/21

First order reaction
If a reaction is first order with a rate constant of 0.0450 s⁻¹, how much time is required for 55% of the initial quantity of reactant to be consumed?
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02/01/21

Write a balanced chemical equation for the reaction below (remember to include states) and indicate the type of reaction (S, D, C, SD, DD) Be sure to show your work.
a) solid calcium oxide react with water to form aqueous calcium hydroxideb) magnesium is added to aqueous aluminum chloridec) aqueous phosphoric acid is mixed with aqueous calcium hydroxide
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02/01/21

Argon has three common isotopes, with the masses and isotopic abundances shown below:
Argon-36 ---> 35.97 u and 3.353 %Argon-38 ---> 37.96 u and 0.868 %Argon-40 ---> 39.96 u and ____ %Determine the average atomic mass of argon to two decimal places.
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02/01/21

Find the mass of formula unit from # of atoms
Find the mass of Al(NO3)3 from 1.50 x 10^22 Oxygen atoms.I'm wondering if either way is correct?1.50x10^22 O atoms x 1 formula unit Al(NO3)3 / 9 O atoms x 1 mol Al(NO3)3 / 6.02x10^23 fu Al(NO3)3... more
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02/01/21

pH Chemistry Question
If 7 mol of sulfuric acid (H2SO4(aq)) is used to create 8 L of solution, what is the pH of this solution?
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02/01/21

Chemistry Question
When methanol, CH3OH, is burned in the presence of oxygen gas, O2, a large amount of heat energy is released, as shown in the combustion reaction:CH3OH(g) + 3/2 O2(g) ⟶ CO2(g) + 2 H2O(l) ... more
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02/01/21

Titration Chemistry
7 mL of a 0.025 M H2SO4 solution neutralizes 8 mL of an AL9OH)3 solution of an unknown concentration. What is the concentration of the base?
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02/01/21

how many moles c2h2 will be needed to fully react with 7.40 moles of o2
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02/01/21

My question is about chemistry , it says calculate the number of atoms of Cl in 0.0425h of C2H4Cl2
Can you Solve it step by step please ? I have a question about a step ,I want to get the number of moles of Cl , so I need to divide it’s mass(g) by its molar or molecular mass , will the molar... more
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02/01/21

Molarity of Lysol Chemistry
If Lysol Spray (539 grams) has a percent composition of 58% w/w Ethanol, what is the Ethanol's molarity?
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02/01/21

Immunoglobulin G (IgG), formerly called gamma globulin, is a principal antibody in blood serum.
A 0.669 g sample of immunoglobulin G is dissolved in water to make 0.156 L of solution, and the osmotic pressure of the solution at 25 ∘C is found to be 0.708 mbar. Calculate the... more
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02/01/21

When 19.8 g of an organic compound known to be 54.53% C , 9.2% H , and 36.32% O by mass is dissolved in 711.5 g of cyclohexane, the freezing point is 0.02 ∘C

The normal freezing point of cyclohexane is 6.59 ∘C. What is the molecular formula for the organic compound? Assume that the organic compound is a molecular solid and does not ionize in... more
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02/01/21

A metal, M , of atomic mass 56 amu reacts with chlorine to form a salt that can be represented as MClx.

A boiling point elevation experiment is performed to determine the subscript 𝑥, and therefore, the formula of the salt. A 39.0 g sample of the salt is dissolved in 100.0 g of water and the boiling... more
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02/01/21

How many grams of a 21.2 % sugar solution contain 26.5 g of sugar?
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