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Chemistry
Given the equation 3H2 + N2 = 2NH3 find how much H2 should be used to produce 170g of NH3
Chemistry
8.10 kJ of heat energy is added to 15.0 g of ice at −25.0 °C. Describe the final state of the system and its temperature.
What state of matter is it? (solid, liquid, gas)
what is the final temperature (C)
What state of matter is it? (solid, liquid, gas)
what is the final temperature (C)
Chemistry
If the mole fraction of glucose in water is 0.050 for a particular solution, what is the molality of this solution?
A] 5.6 m
B] None of the listed answers are correct
C] 0.50 m
D] 0.34 m
E] 2.9 m
A] 5.6 m
B] None of the listed answers are correct
C] 0.50 m
D] 0.34 m
E] 2.9 m
Chemistry
How will the vapor pressure of a pure liquid change if enough solute is added to result in a mole fraction of 0.50?
A] The vapor pressure of the liquid will decrease a small amount.
B] The vapor pressure of the liquid will decrease by half.
C] The vapor pressure of the liquid will double.
D] None of the listed answers are correct
E] The vapor pressure of the liquid will increase a small amount.
A] The vapor pressure of the liquid will decrease a small amount.
B] The vapor pressure of the liquid will decrease by half.
C] The vapor pressure of the liquid will double.
D] None of the listed answers are correct
E] The vapor pressure of the liquid will increase a small amount.
Chemistry
how you would preparethe 50 ppm slution of Cu using salt of CuSo4
Chemistry
This is a question about analytical chemistry, in which concentration of [Fe(SCN)]2+ is determined by measuring the light absorbance after adding excess Fe 3+ ions into a sodium thiocyanate solution. However, I am so confused since the yellow color of the iron 3+ ions will affect the color intensity of the solution. Will it affect the measurement of the blood red colored [Fe(SCN)]2+ solution concentration?
Chemistry
The element platinum is commonly used as a catalyst to accelerate the rates of chemical reactions. How many atoms of platinum (Pt) are present in 85.50 grams of platinum? Report your answer to 3 significant figures.
Chemistry
A Photon has a wavelength of 698 nm. What is the frequency of the photon?
Chemistry
The rate constant of a first order reaction is 6.9×10^-3 s^-1. How much time will it take to reduce the initial concentration to it 1/8 th value?
Chemistry
The compound KCLO3 decomposes according to the following equation
@KCLO3-- 2KCL + 3O2
a) what is the mole ratio of KCLO3 to O2 in this reaction?
b) How many moles of O2 can be produced by letting 6.0 moles of KCLO3 react based on the above equation?
c) How many molecules of oxygen gas, O2, are produced in question 1b?
2. Magnesium combines with chlorine, Cl2 to form magnesium chloride, MgCl2 during a synthesis reaction.
a) write a balanced chemical equation for the reaction.
b) How many moles of magnesium chloride can be produced with 3 moles of chlorine?
@KCLO3-- 2KCL + 3O2
a) what is the mole ratio of KCLO3 to O2 in this reaction?
b) How many moles of O2 can be produced by letting 6.0 moles of KCLO3 react based on the above equation?
c) How many molecules of oxygen gas, O2, are produced in question 1b?
2. Magnesium combines with chlorine, Cl2 to form magnesium chloride, MgCl2 during a synthesis reaction.
a) write a balanced chemical equation for the reaction.
b) How many moles of magnesium chloride can be produced with 3 moles of chlorine?
