11/13/18
calculate the theoretical and percent yields of Ag2CO3
if 400 g of silver are reacted with an excess of magnesium (ii) carbonate, MgCO3, then magnesium and 0.00956 Kg of silver (i) carbonate are obtained. calculate the theoretical and percent yields of...
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11/13/18
if the concentration of a stock solution is 0.152M, what is the concentration of 10.0 mL of the stock solution diluted into a 100 mL volumetric flask
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11/12/18
why are two potassiums needed to bond to one carbonate?
why are two potassiums needed to bond to one carbonate?
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11/12/18
A construction crew has just finished building a road. The road is 9 kilometers long. If the crew worked for 4 2/7 days, how many kilometers of road did they finish each day
How many kilometers did the construction build each day if they worked for 4 2/7 days
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11/12/18
Finding PH of carboxylic acids
HCOOH(l) = HCOO–(aq) + H+(aq) Ka= 10^–4What is the pH of a 10^–2M HCOOH solution?
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11/12/18
Hi!!! I'm having a lot of trouble doing this problem can you help? Thanks a lot!!!!! 💕
Tim is taking the train to Seattle to visit his grandparents. He was given $5.00 to spend on snacks and reading materials. Granola bars cost $0.75 dollars each and a newspaper is $1.25. If Tim buys...
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11/11/18
Please I Need Help With the Chemistry Aqueous Equilibria problem?
1(a) Write a balanced equation and corresponding solubility product expression for solid zinc hydroxide,Zn(OH)2, in equilibrium with its ions in solution. (b) This solution has a pH of 8.87....
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11/11/18
Need Help With the Chemistry Aqueous Equilibria problem?
1. Determine the pH of a solution prepared by adding 17.2mL of 0.157MKOH to 20.0mL of 0.132MHNO3 solution. 2. Consider the titration of 15.0 mL of 0.0738M hydroazoic acid (HN3, Ka= 1.9x10^-5) (a)....
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11/11/18
Calculate how many moles of NO2 form when each quantity of reactant completely reacts. 2N2O5(g)→4NO2(g)+O2(g)
2.6 mol N2O56.8 mol N2O53.73 kg N2O5
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11/11/18
Max works in a shop.
(a)In one week he earned $277.20.(i)he spent 1/8 of this on food. Calculate how much he spent on food (ii) he paid 15% of the 277.20 in taxes. Calculate how much he paid in taxes.
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11/10/18
A hot air balloon went from an elevation of 4,158 feet to an elevation of 3,393 feet in 30 minutes. What was its rate of descent?
A hot air balloon went from an elevation of 4,158 feet to an elevation of 3,393 feet in
30 minutes.
What was its rate of descent?
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11/10/18
Translation Problem
The sum of two numbers is negative seven. The sum of twice the smaller number and seventy is six. Find both numbers? I got -32 for one but can’t seem to find the other number.
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11/09/18
A element emits radiation and he started with .07 grams. After 5 days only .05 of the original element remain. Use the formula A(t)=Aoe^kt
A.Calculate the value of K.B.Find the half lifeWould love some help on this as i can't find the solution anywhere.
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11/09/18
What can a Half Life of 2.7 years determine the age of? Like, what things can it determine the age of?
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Which element does beryllium "like" or "dislike" bonding with and why?
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11/08/18
Of the molecules below, only __________ is polar. CCl4 CH4 CH3Cl SiCl4 I2
Of the molecules below, only __________ is polar.
CCl4
CH4
CH3Cl
SiCl4
I2
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11/08/18
Of the molecules below, only __________ is polar. BF3 NH3 I2 CO2 CCI4
Of the molecules below, only __________ is polar.
BF3
NH3
I2
CO2
CCI4
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11/08/18
The hybridization of two atomic orbitals results in the formation of __________ molecular orbitals. 1 2 3 4 0
The hybridization of two atomic orbitals results in the formation of __________ molecular orbitals.
1
2
3
4
0
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11/08/18
The electron-domain geometry of __________ is tetrahedral. SO2 SO3 SnCl3- XeF4 All of the above
The electron-domain geometry of __________ is tetrahedral.
SO2
SO3
SnCl3-
XeF4
All of the above
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11/08/18
Suppose you conducted the hydrogen emission experiment, and you observed four different colored light beams, but they were extremely dim.
Would you conclude the powersupply was faulty or would you conclude that the tube did not contain enough hydrogenatoms? Explain your reasoning.
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11/08/18
A solution has a pOH of 8.20. What is the concentration of H3O+?
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11/08/18
Suppose you conducted the hydrogen emission experiment and you observed only red light but not green, blue, or violet.
Would you conclude the power supply was faulty orwould you conclude that the tube did not contain enough hydrogen atoms? Please explain thanks!
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11/07/18
If 450.0 g of NaN3 react what is the volume of N2 gas if it is collected at 15.7 psi and 25 degrees Celsius
2NaN3 yields 2Na + 3N2If 450.0 g of NaN3 react what is the volume of N2 gas if it is collected at 15.7 psi and 25 degrees Celsius
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