In older airbags, sodium azide, NaN3, was used as a source of nitrogen gas to rapidly inflate the airbag. This practice was mostly discontinued due to the high toxicity of sodium azide. The reaction of interest is 2 NaN3 (s) → 2 Na (s) + 3 N2 (g)
How many grams of N2 are produced if a 35.0 g charge of NaN3 decomposes?
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A 400 mL buffer solution was prepared by reacting sodium acetate, CH3COONa, with 1.00 M acetic acid, CH3COOH, with a pH of 4.56 Calculate the mass of CH3COONa required to prepare the solution. Ka CH3COOH= 1.75 x 10-5
1. For the gaseous reaction: 2NO + 2H2 N2 + 2H2O The following data at 1100K were obtained:
Reactant Concentrations
[ NO]
5.0 x 10 -3
15.0 x 10 -3
15.0 x 10 -3
[H2]
2.0 x 10 -3
2.0 x 10 -3
4.0 x 10 -3
Rate of reaction
(mol / L. s )
2.4 x10 -5
2.2 x10 -4
4.4 x10 -4
a. Write the rate equation for the reaction.
b. What is the order of reaction?
b.1. with respect to NO ______________
b.2. with respect to H2 ______________
b.3. overall order of reaction __________
c. Calculate the rate constant for the reaction at 1100K
d. Calculate the rate in mol/L. s at 1100K at the instant when [NO] = 2.10 x 10 -3 and
[H2] = 2.50 x 10 -3
what is the percent hydrogen in ammonium oxalate (NH4)2C2O4
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Which ion has the most shells that contain electrons ?
Al 3+ , Be 2+ , N 3-
1) Many chemical processes release waste products into the atmosphere. Scientists are developing new solid catalysts to convert more efficiently these emissions into useful products, such as fuels. One example is a catalyst to convert these emissions into methanol. The catalyst is thought to work by breaking a H–H bond.
An equation for this formation of methanol is given below.
CO2(g) + 3H2(g) CH3OH(g) + H2O(g) ∆H = −49 kJ mol−1
(a) Use the enthalpy change for the reaction and data on bond entahlpies to calculate a value for the C=O bond enthalpy.
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