chemistry
An aqueous solution of phosphoric acid, H3PO4, contains 285 g H3PO4 in 400 mL solution, and has a density of 1.35 g/mL. Calculate a. the weight % H3PO4 in this solution. b. the concentration in mol/L of this solution
us history
how did religion shape the development of colonial society in the Chesapeake?
physics
A 680 Hz tuning fork is held over a long vertical tube full of water. If the tube is 1.00 m long, how many resonances will be heard as the tube is allowed to empty from the bottom?
Algebra
I am havine trouble with this problem will someone please help me The perimeter of a rectangle is 68m The length is 10 m more than twice the width. Find the dimensions
8th grade
What were the massachusetts fighting for?
help with math please
a gardner wishes to encloe a rectangular 3000 square feet area with bushes on three sides and a fence on the 4th side .If the bushes cost $25.00per foot and the fence costs $10.00 per foot, find the dimensions that minimize the total cost and find the minimum cost
health
How do culture and health beliefs affect the spread of emerging disease? Can someone help me with specific examples?
science
V=180
MATH
HOW TO SOLVE Y=6X-11 AND -2X-3Y=-7
8th grade
HOW TO SOLVE FOR SUBSTITUTION
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