04/23/18

What grows on an alkaline peptone broth apart from Vibrio?
I have done an experiment where growth on an alkaline peptone was monitored and then we innoculated a TCBS media, however no growth occured on the TCBS media so i was wondering what else could... more
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04/23/18

the carbon in the
The carbon (C) in the compound C3H3CI5 weighed 66g. How much did the hydrogen (H) weigh?
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04/23/18

Find the half-life. (Round your answer to the nearest whole number.)
A breeder reactor converts uranium-238 into an isotope of plutonium-239 at a rate proportional to the amount of uranium-238 present at any time. After 10 years, 0.03% of the radioactivity has... more
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04/23/18

The kidneys are organs that filter wastes out of the blood stream. Which of the following objects could best be used to make a simple model of a kidney?
plastic bag B. block of wood C. water pump D. coffee filter
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04/23/18

What state is iron(iii) phospate in?
Fe2O3(s)+ H3PO4(aq)= Fe2PO4(?)+ H2O(l)what state is iron phosphate in.
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04/23/18

Guys please help. Partial pressure of gasses
200 g of Helium and 200 g of Hydrogen are introduced into a 100 L tank at a temperature of 0° C. If the cylinder is then heated to 25° C, how much will the partial pressures of the two gases... more
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04/23/18

30g N2, 90g 3H2 find ammonia
If 30g of nitrogen   90g of hydrogen taken find ammonia
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04/22/18

A 50ml Sample of gas exerts a pressure of 4500 torr at 35C . What is the final volume at STP.
This is some chemistry homework and I dont understand how to do it. Nobody in my family has any clue to do it or figure it out
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04/22/18

How long will it take for [A] to decrease from 1.63 M to 0.550 M?
The rate constant for the reaction 2A → B is 7.67 × 10−3 s−1 at 110°C. The reaction is first order in A. How long (in seconds) will it take for [A] to decrease from 1.63 M to 0.550 M?
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04/21/18

Given the reaction of diamond converting to graphite
2C (s diamond)==>2C (s graphite)   Determine ΔG at 298L and determine if this reaction is spontaneous or not. What does the ΔG say about the rate of this reaction?   ΔH°f (C (s)... more
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04/21/18

Which of the following changes in states represent the smallest Delta S. Which has the largest Delta A. Explain
A. The freezing of water to ice B. Melting of ice to liquid water C. Sublimation of ice to gas
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04/21/18

The radioactive element​ carbon-14 has a​ half-life of 5750 years. A scientist determined that the bones from a mastodon had lost 86.2​% of their​ carbon-14. Ho
The radioactive element carbon-14 has a half-life of 5750 years. A scientist determined that the bones from a mastodon had lost 61.2% of their carbon-14. How old were the bones at the time they... more
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04/21/18

what type of bond is sodium metabisulfite?
I have a project due on Monday. Please help!! 
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04/21/18

Chemistry Help!
The country of India recently purchased a substantial amount of standard 12.4 kg gold bars to store in their central bank. However, after the bars were delivered and analyzed, it was found that... more
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04/20/18

At 19 °C, a 0.90 mole sample of a gas exerts a pressure of 2.4 atmospheres. What is the volume of the container?
..................................
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04/20/18

At what temperature (in Kelvin) would 3.59 moles of hydrogen gas in a 56.7 L container exert a pressure of 2.00 atmospheres?
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04/20/18

How many grams of sodium bromide must be dissolved in 600 grams of water to produce a 0.080 molal NaBr solution?
Please include an explanation if possible.
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04/20/18

A gas occupies a volume of 2.4L at 17.1 kPa. What volume will the gas occupy at 153.9 kPa?
A. 1097L B. 22L C.3.8L D.0.27 L
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04/20/18

Dihydrogen has occupies 140mL at -117C and3.00 atm. How many g od gas are present?
A. 30.7 mL B. 42.0 mL  C. 27.5mL D.5.01 mL
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04/20/18

Exactly 100 ml of 0.15 M acetic acid (HC2H3O2, Ka=1.8x10^-5) are titrated with a 0.20 M NaOH solution.Calculate the pH for
(a) the initial solution (HC2H3O2 solu) (b) the point at which 37.5 ml of the base has been added. (c) equivalence point  (d) after adding 80.0 ml of 0.20 M NaOH 
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04/20/18

Calculate the molar solubility of PbI2 (Ksp = 1.4x10^-8)in (a) Pure water (b) On 0.50 L of solution that contains 15.0 g of FeI3 .
Please answer in details with all steps. 
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04/20/18

one of the ways of producing Nitrogen Monoxide is to reach ammonia (NH3) gas with Dioxgen.....
this reaction yields Nitrogen Monoxide and water if 65g of NH3 are reached with 145g of dioxygen what volume of nitrogen Monoxide will be generated at 75F and 696 Torr
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04/20/18

a weather ballon on the ground at 30.04 inches of Hg...
has a volume of 99.43L yards at 72F. If it ascends to a height of two miles where the atmospheric pressure is 714 torr and temp. is 2C. How many liters will the gas in the ballon now occupy?
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04/19/18

Jamal has a pair of shoes that have a total mass of 960 grams and four identical books that have a total mass of 2 kilograms. Which has the greater mass: one s
Math, Convert Metric Units of Mass, Word problem 
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04/19/18

If its volume is increased by 20% and its absolute temperature is decreased by 12%, what is the percent change to its pressure?
what is the kinetic theory of the question? I want to know the percent of to its pressure of gas.
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