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Rav
Questions and answers by visitors named
Rav
Questions (25)
Explain why a mixture formed by mixing 100 mL of 0.100M CH3COOH and 50 mL of 0.100M NaOH will act as a buffer? in adittion to
5 answers
4,334 views
Sorbic acid, HC6H702 (pKa=4.77), is widely used in the food industry as a preservative. For example, its potassium salt
2 answers
1,092 views
What must be the molarity of an aqueous solution of NH3 if it is 4.2% ionized?
3 answers
936 views
Calculate [H30+] in a solution that is 0.0525M HCl and 0.768M NaC2H3O2. Ka(HC2H3O2)= 1.8 x10^-5.
the way i did it is that i used
3 answers
890 views
So in this reaction:
Ag(s) + Fe(+3) --> Ag(+) + Fe(+2) we are given 20 grams of Ag(s) to start off with. How do we find how many
1 answer
372 views
A small paint bucket of mas 5.0 kg is attached to a larger bucket of mas 15.0 kg by a light rope of 25 m long. The small bucket
2 answers
523 views
A spherical ball is being filled with air. When the radius r=7cm, the radius is increasing at a rate 2 cm/s. How fast is the
1 answer
436 views
Here are the results of the 3 trials of dissolving equal masses of marble in hydrochloric acid listed from fastest to the
5 answers
481 views
Need examples of food for Chemistry Reactions
1. Synthesis 2. Decomposition 3.Single Replacement 3. Double Replacement So for
3 answers
1,006 views
Factor, if possible.
36xy - 12x^2y
3 answers
514 views
1.5mL of a 0.05M solution of calcium chloride (CaCl2) was diluted with water to a volume of 10L. What was the concentration of
3 answers
748 views
What is the value of 6.9−2⁰ ?(1 point)
Responses
1 answer
21 views
Apply the Property of Negative Integer Exponents to generate an expression equivalent to 3−178−14 with positive exponents
1 answer
38 views
Apply the Property of Negative Integer Exponents to generate an expression equivalent to 3-17/8-14 with positive exponents
1 answer
13 views
Apply the product rule of integer exponents to find the numerical equivalent of 12−⁵• 12⁷ . Show your work and explain
1 answer
54 views
1.15741 x 10^-5
1 answer
19 views
The temperature of the sun at its center is about 2.7×107 degrees Fahrenheit. What is this temperature written in decimal
1 answer
25 views
Place the numbers in descending order.
2.3 × 10−10 ; 3.2 × 10−10 ; 2.3 × 10−12 ; 2.3 × 10−8 (2 points)
1 answer
14 views
The distance from Venus to the sun is about 67,000,000 miles. The distance from Earth to the sun is about 2.6×107 farther. What
1 answer
35 views
Calculate 4.8×10−3−9.4×10−6. Express the answer in scientific notation rounding to 2 decimal places.(1 point)
1 answer
22 views
Calculate 4.8×10−3−9.4×10−6. Express the answer in scientific notation rounding to 2 decimal places.(1 point)
1 answer
28 views
A strand of hair has an average mass of 2.17×10−5 ounces. A grain of rice has an average mass of 0.002 ounces. How much
1 answer
23 views
Light travels at an approximate rate of 1.9×105 mi./sec. There are about 3.2×107 seconds in a year. About how many miles does
1 answer
28 views
The average tectonic plate moves at the rate of 0.006 m per year. How many meters would it move in 2×106 years? Write the
1 answer
22 views
An asteroid is heading toward Mars at the rate of 7.7×104 mi./hr. If the asteroid is 3.311×108 miles away from Mars, how many
1 answer
22 views
Answers (8)
Oh wait my decomposition is wrong I guess so I need it for that as well
Thanks so much I agree:)
The results are there for each trial Trial 1 = Hydrochloric Acid is dilute. Marble is finely ground and the temperature is 20 degrees Celsius Trial 2 = Hydrochloric acid is dilute. Marble is lump and the temperature is 40 degrees Celsius. Trial 3 =
The best girl at sports in the class is my best friend. Last year, she won two medals for swimming. It was when the had a huge swimming gala at the Bath in Town. Everyone and their parents were there in the lower school. The noise was so loud that our
Company 1 = 9.95+0.10x = y Company 2 = 12.95+0.08x = y Not sure of the second question
yes, that is exactly what i get(i got 5.87, but that's probably just a simple rounding error). i used the wrong equation, and didn't include the hydrogen ion from HCl in the equation, and just used the acetic ion as the only source of the hydroxide ion.
this is just simple dimensional analysis and conversion... (.0 X10^23 molecules)(1 mol/6.02 X10^23 molecules)([molar mass ethanol=g/1 mol)(upside down density=mL/g)(1L/1000mL) through this conversion process, u'll get the answer.
thank you....i understand the concept clearly now.
