04/10/18

The Winning speed in the 2011 indianapolis 500 was 170.265 miles per hour. What is thta speed rounded to the nearest tenth of mile per hour?
A. 170.2 miles per hour B. 170 miles per hour C. 170.3 miles per hour D. 170.27 miles per hour
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04/10/18

how does the lattice structure cause impurities?
I need help
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04/10/18

In a chemical reaction known as decomposition, carbonic acid breaks down into water and what other compound?
In a chemical reaction known as decomposition, carbonic acid breaks down into water and what other compound?
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04/10/18

Explain how and why tube 1 and tube 2 would look different after one hour
A student set up an experiment to investigate osmosis. The student used visking tubing which is a partially permeable membrane. The student put 25cm3 of 20% sucrose solution into visking tube 1... more
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04/10/18

Express answer in scientific notation
In a state with a population of 2,000,000 the average citizen spends $6,000 on housing each year. What is the total spent on housing for the state? Express answer in scientific notation.
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04/09/18

if there are 5mg in 10ml then how many mg in 1 ml
 How many milligrams in 1 ml if there are 5 milligrams in 10 milliliters
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04/09/18

Lewis acid base concept
Sicl4 is Lewis acid or not
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04/09/18

Chemistry HELP!
Consider the following diprotic acid.H2A+H2O⇀↽H3O+ +HA− Ka1 =5.0×10−5 HA− +H2O⇀↽H3O+ +A2− Ka1 =4.5×10−5The initial concentration of H2A = 1.0 × 10−5 M.1. Since the Ka1 and Ka2 values are very... more
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04/09/18

Give the formula for the conjugate base of each acid. HNO2? NH4+? H2O2?
HNO2 NH4+ H2O2
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04/09/18

organic chemistry
A sample of krypton gas at a pressure of 0.561 atm and a temperature of 117 °C, occupies a volume of 633 mL. If the gas is heated at constant pressure until its volume is 740 mL, the temperature of... more
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04/09/18

organic chemistry
A sample of argon gas at a pressure of 0.894 atm and a temperature of 199 °C, occupies a volume of 853 mL. If the gas is heated at constant pressure until its volume is 998 mL, the temperature of... more
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04/09/18

what is the molarity in 650.ml of solution containing 63 grams of NaCl?
i dont know how to do it can you guys please help me 
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04/09/18

8.5 grams k2co3 = _______ moles
....................
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04/09/18

77.2 L of So2= moles of SO2
any way 
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04/09/18

0.925 moles of N2= molecules of N2
any way 
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04/09/18

3.33 x 10^24 molecules of H2SO4= moles
any 
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04/09/18

7.55 moles C6H12O6= grams
any 
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04/09/18

8.52 grams K2CO3 = moles
any 
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04/09/18

How can an astronaut weigh different amounts when in different locations?
its about gravity and space 
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04/09/18

boiling point
How much Magnesium chloride would you need to put in 555 g of water to raise the boiling point by 11 o C
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04/09/18

What is the new freezing point
What is the new freezing point if you put in 100.0 g of sodium chloride into 750. mL of water (density 1.00 g/mL)(
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04/09/18

chemistry 111 problem
solution A absorbs light at a wavelength of 525 nm. If solution B requires a larger amount of energy to absorb light, is the wavelength of solution B larger or smaller compared to solution A?
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04/09/18

HW1 LAB CHEMISTRY
The molar absorptivity, epsilon, of a particular compound is 5,674 M^-1*cm^-1.The absorbance of a solution was found to be 0.75 and the pathlength of the cuvette used was 10mm. What is the... more
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04/09/18

What physical properties make underground methane storage efficient
What physical properties make underground methane storage efficient? I'm trying to figure out why exactly we store methane underground and there's nothing on this online
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04/08/18

use standard heast of formation
Using standard heats of formation, calculate the standard enthalpy change for the following reaction. 2H2(g) + O2(g)2H2O(g)ANSWER: kJ
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