A chemist claims to have discovered a new gaseous element, effuvium (Ef), which reacts with atmospheric nitrogen to form effuvium nitride: 2 Ef(g) + 3 N2(g) 2 EfN3(g) In a container initially containing N2 at 1.00 bar and Ef at 0.75 bar, the total pressure at equilibrium, according to the chemists measurement, is 1.4. Compute Keq for this reaction. Entry field with incorrect answer 0.84 The number of significant digits is set to 2; the tolerance is +/-1 in the 2nd significant digit.

Calculate [H3O+] and [OH−] for each of the following solutions at 25 ∘C given the pH.

Part A.) pH= 8.65

Part B.)  pH= 11.40

Part C.)  pH= 2.94

in a lab experiment to test the change in temperature of NaCl and the change in temperature of water:

Specific heat of NaCl is 0.88
specific heat of DI water is 4.2

in the experiment, the change in temperature for the water was much greater than the change in temperature of the table salt as well as the change in energy.
(when using equation E = g C × change in T)

why did this occur?

1. PF5 has five single bonds to the central atom. SF4 has four single bonds to the central atom and the central atom possesses a lone pair of electrons. How can this observation be used to explain the different bond angles you measured.

Write the summary on the Analysis of Copper using Flame atomic absorption.

Describe sources of experimental error and how it can impact the data collected ?

discuss what is matrix interference that might occur In this experiment ?

Estimate, on the basis of CTST, the pre-exponential factor at 300K for the following types of gas reactions:

a. a bimolecular reaction between an atom and a diatomic molecule with the formation of a linear activated complex.

b. a biomolecular reaction between two diatomic molecules that form a linear activated complex with no free rotation.

Calculate how many mL of 0.100 HCl should be added to how many grams of sodium acetate dihydrate (NaOAc * 2H2O, FM 118.06) to prepare 250.0 mL of 0.100 M buffer, pH 5.00.

Calculate the pH of a 0.10 M solution of barium hydroxide, Ba(OH)2. Express your answer numerically using two decimal places.

Calculate the pH of a 0.10 M solution of NaOHNaOH. Express your answer numerically using two decimal places.

Calculate the pH of a 0.10 M solution of hydrazine, N2H4. Kb for hydrazine is 1.3×10−61.3×10−6. Express your answer numerically using two decimal places.

Calculate the pH of a 0.10 M solution of hypochlorous acid, HOCl. Ka of HOCl is 3.5×10−8. Express your answer numerically using two decimal places.

Calculate the pH of a 0.10 M solution of HCl. Express your answer numerically using two decimal places.

What do tyrosinase inhibitors do?
What is the importance of tyrosinase and tyrosinase inhibitors in the food industry?

In the citric acid cycle, malate is oxidized to oxaloacetate by the enzyme malate dehydrogenase, which uses NAD+ as an electron acceptor. In cells, the ratio of [NAD+]/[NADH] is kept very high. Given the following standard reduction potentials, explain why it is so important for cells to maintain this ratio. Justify your answer with words, equations and diagrams.

oxaloacetate + 2H+ + 2e- -> malate

E°red= -0.166 V

NAD+ + H+ + 2e- > NADH

E°red= -0.320

You are considering options for a deposition process for a-Si that gives acceptable quality films and is able to deposit 5 nm thickness in less than a minute. Compare the HW PECVD, VHF PECVD and RFCVD in terms of the required output.

Nitrogen and hydrogen combine at high temperature, in the presence of a catalyst, to produce ammonia.

N2(g)+3H2(g)-->2NH3(g)

Assume 0.210 mol N2 and 0.664 mol H2 are present initially.

1.)After complete reaction, how many molecules of ammonia are produced?

2.How many molecules of H2 remain?

3.How many molecules of N2 remain?

4.What is the limiting reactant, Hydrogen or Nitrogen?

How many milliliters of 0.100 M NaOH are required to neutralize the following solutions?

(a) 8.00 mL of 0.0500 M HCL

(b) 20.00 mL of 0.126 M HNO3

(c) 45.00 mL of 0.215 M H2SO4

How many milliliters of 0.100 M HNO3 Are needed to neutralizw the following solutions

34.7 mL of 0.775 M Naoh _____mL

58.5 mL of 0.0100 M Al(OH)3 ____mL

* Predict solubility based on hydrogen bonding interactions

Predict electron distribution in a bond from electronegativity

Define the chemical basis of hydrogen bonding.

Identify and construct hydrogen bond donor and acceptor groups

Predict hydrogen bonding potential among various functional groups

Relate hydrogen bonding with solvent water to solubility