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Kelsy
Questions (8)
The Martian moon Phobos travels once around the planet Mars every 7 hours and 39 minutes. What is the angular velocity of Phobos
1 answer
507 views
I would like to check my answer to the following question:
The permanganate ion oxidizes bromide in acidic conditions to form
11 answers
2,013 views
I need to calculate the amount of NaH2PO4 (in grams) and 1.00M NaOH solution (in ml) needed to make 250 ml of 0.20M H2PO4- at pH
7 answers
733 views
I need to calculate the amount of NaH2PO4 (in grams) and 1.00M NaOH solution (in ml) needed to make 250 ml of 0.20M H2PO4- at pH
1 answer
594 views
In which sentence are the conjunctions used correctly?
A. The top award was given to neither Steve or Jim. B. Either Fred nor
1 answer
728 views
What force is needed to move a 200.00 neuton chair 1.7 meter?
0 answers
322 views
Hy Dr Bob222 this will be the last time I will bother you about this type of question. Can you please tell what I am doing
2 answers
822 views
If 1.00 mol of iodine and 0.50 mol of chlorine are initially placed into a 2.00 L reaction vessel at 25 degrees celsius, find
1 answer
561 views
Answers (21)
90,000
Tanyas heart beats 68 times per minute how many times does it beat in one hour
Yes. Thank you. I totally forgot to multiply the half reactions after balancing them. Lame. I appreciate the help.
We overlapped. Yes I got it. Thank you.
Ooops I left some out: 16H+ + 2MnO4- + 10 Br- ---> 5 Br2 + 2Mn 2+ + 8H2O :) Is this it???
I think I have it... 10e- + 16H+ + 2MnO4- + 10 Br- ---> 5 Br2 + 8H2O + 10 e- Now remove the 10e- from both sides: 16H+ + 2MnO4- + 10 Br- ---> 5 Br2 + 8H2O
I'm lost. I really don't see what I am missing in this.
No, that won't work.
Should I use H3O+ rather than H+?
Thanks on the arrow. I don't know. In acid solutions I need the H+ ions. Charges have to balance. I balanced using the oxidation states of each species. I did half reactions. Perhaps the water is messing me up.
Could you show me how you got it? I'm not sure what I did wrong.
Can you suggest a different pka or what I might have done wrong? I got a pka of 7.2 by using pKa = -log(Ka) and Ka for H2PO4- is 6.3e10^-8. I know that a pKa of 7 will yield a buffer in the range of 6.2 to 8.2. I calculated I needed 6.1 g of the NaH2PO4
Hmmm, ok. True. Ok I will try again. Thank you.
7.21
It sounds to me like the calming reaction would be due to her parasympathetic nervous system, as she was originally in fight or flight mode and had a sympathetic nervous system reaction.
It seems to me that it is a hyperbole (exaggeration )
x=-7 and x=-4 x+7=0 and x+4=0 (x+7)(x+4) = x^2 + 4x + 7x +28 the equation would be x^2 + 11x + 28
y= 587,000(0.88)^x so.. y= 587,000(0.88)^10 y=587000 x 0.278500976 y=163480.0729
This would be the cell membrane or in a plant cell, the cell wall.
No Sir, thank you :)
I get 4.0 x 10^-3 but im incorrect
