09/06/16

ordered 37.5 mg of a particular drug over 15 minutes. If the drug was available as 2.5 mg/mL of solution, how many mL would you need to give every 15 seconds?
A physician has ordered 37.5 mg of a particular drug over 15 minutes. If the drug was available as 2.5 mg/mL of solution, how many mL would you need to give every 15 seconds?
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09/04/16

Molar Enthalpy Change
A spirit burner was half filled with liquid heptane C7H16 weighed and put under a beaker containing 200cm3 of water in a tripod. When the temperature has risen exactly 20C the fire was extinguished... more
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09/01/16

A droplet of pure mercury has a density of 13.6 g/cm3 . What is the density of a sample of pure
A droplet of pure mercury has a density of 13.6 g/cm3 . What is the density of a sample of pure mercury that is 10 times as large as the droplet?
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08/31/16

chemistry help please
1. When dealing with the noble gases on the periodic table, they do not bond due to full valence shells. What is the correlation of the gaseous state and the lack of bonding?   2. How many... more
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08/30/16

Intro Biology Question regarding water (chemistry related)? PLEASE HELP!
Which statements about water and 'anti-water' (something that is the opposite of water in terms of molecular properties) should be true? Select one:a. Lubricants such as engine oil must work... more
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08/30/16

What is the consequence that electrons can be relatively easy to remove from an atom but protons and neutrons can not?
What is the consequence that electrons can be relatively easy  to remove from an atom but protons and neutrons can not?
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08/28/16

can you tell me an idea how to clean phenol from the water
i would be pround if you answer to my question
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08/25/16

If the density of silver is 10.5 g/mL, what is the mass of 3.7 mL of silver?
I need to be shown how to work out this peoblem.
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08/24/16

22.5 mL of an H3PO4 solution were titrated with 31.27 mL of a 0.167 M NaOH solution to reach the equivalence point, what is the molarity of the H3PO4 solution?
Please help!
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08/23/16

47.0 mL of a H2CO3 solution were titrated with 37.5 mL of a 0.215 M LiOH solution to reach the equivalence point, what is the molarity of the H2CO3 solution?
I cant seem to get the correct answer, please help!
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08/17/16

Mark received an hourly wage of $9.25. His boss gave him a 4% raise. How much does Mark make per hour now?
(A) $9.29(B) $9.62(C) $9.89(D) $9.99
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08/17/16

Concentration with Uncertainty
Timothy has 1 gallon of 6% bleach, assume 94% is water.Timothy decides to dilute the bleach separately. Timothypours 10mL+0.1, 9mL+0.1, 8mL+0.1, 7mL+0.1, 6mL+0.1, and 1mL+0.1, of the bleach into 6... more
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08/15/16

Chemistry honors measurement word problem
If a temperature scale were based on freezing point5.5 C and boiling point 80.1C of benzene & the temp difference between was divided into 50 units Called degree X what would be the freezing... more
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08/14/16

Chemisty states of matter
The two bulb of volume 5L n 10L contai an ideal gas at 9atm and 6atm respectively r connected. What is d final pressure in d two bulbs if d temperature remains constant...???
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08/12/16

chemistry about base and acid and buffer
hello, I was wondering if you'd be able to help me with chemistry?tomorrow I have an exam and I don't understand some things. 1. when can you say of a buffer is effective or not?2. so the prof gave... more
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08/12/16

9. Which of these process is always exothermic?
1. melting2. condensing3. boiling4. Evaporation
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08/09/16

How many times larger is the new volume of a cylinder if the radius is doubled and the height remains the same?
please help
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08/08/16

The salt content of the Caspian sea is 0.13 kg for every liter of water. How many kg of salt are in 70 liters?
Word Problem
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08/05/16

how many elements are in (NaoH)2
i need help with this asap.
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07/28/16

Which of the following alkenes cannot undergo hydrogenation?
a) cyclohexene  b)benzene c) 1-propene  d) 2-propenal 
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07/26/16

How much CaCl2 needs to be added to change the concentration of Ca from 100mg/L to 200mg/L?
Question: I have 275 gal of water. Ca concentration is 100mg/L. How much CaCl2 is needed to be added for Ca to become 200mg/L?   I understand that you should convert mg to grams, and doing so... more
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07/26/16

For the equilibrium PCl5 with equilibrium PCl3 +CL2 at 298k K=1.8×10^-7.what is ?G° for the equation?
?G° result
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07/25/16

express the area of the rectangle as a function of x
a farmer has 7200 feet of fencing available to enclose a rectangular are and divide it into ten rectangular plots. let x represent the length of the side of the rectangle as defined in the figure... more
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07/25/16

Can the value of E°cell be zero? If it is tell me when
This is a chemistry question from electrochemistry.
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07/25/16

When Ecell = E°cell
This is chemistry question from electrochemistry
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