Josh G.

This page lists questions and answers that were posted by visitors named Josh G..

Questions

The following questions were asked by visitors named Josh G..

A Princeton prof. (mass = 70.0 kg), surprised by the large stopping force he calculates for jumping flat footed from a height of 0.12 m, decides to try the experiment. Calculate he deceleration (in g's) if he stops in a distance of 0.36 cm. (Do not try th...

use the double angle formula to rewrite. 6cos^2-3 and (cosx +sinx)(cosx-sinx)

Express your answer as a chemical formula. 1.Cr^-3 and Br^- 2. Fe^3+ and O^2- 3.Hg2^2+ and CO3^2- 4.Ca^2+ and CIO^3- 5. NH^+4 and PO4^3-

Consider the reaction CaSO4(s)rightleftharpoons Ca^2+(aq)+ SO_4^2-(aq) At 25 C the equilibrium constant is Kc = 2.4 \times 10^-5 for this reaction. If excess CaSO4(s) is mixed with water at 25C to produce a saturated solution of CaSO4, what are the equili...

I got 4.9*10^-3 M. Thanks and If the resulting solution has a volume of 1.9L , what is the minimum mass of CaSO4 (s) needed to achieve equilibrium?

simplify using imaginary number i. Division: square root of -5/square of -7.

If pH = 6.6, calculate the molar concentration of H^ + (aq) in the solution.

If ions O^2- are added to water, what reaction, if any, occurs?

An unknown salt is either NaF, NaCl or NaOCl when 0.050 moles of the salt is dissolved in water to form 0.500 L of solution, the pH of the solution is 8.08? is the solution NaF, NaCl, or NaOCl, I think its NaF?

The value of Keq for the equilibrium H2 (g) + I2 (g) ↔ 2 HI (g) is 794 at 25 °C. What is the value of Keq for the equilibrium below? 1/2 H2 (g) + 1/2 I2 (g) ↔ HI (g)

Calculate the pH of a solution at 25.0 °C that contains 1.94 × 10-10 M hydronium ions.

Calculate the percent ionization of nitrous acid in a solution that is 0.311 M in nitrous acid (HNO2) and 0.189 M in potassium nitrite (KNO2). The acid dissociation constant of nitrous acid is 4.50 × 10-4.

Given the following reaction at equilibrium, if Kc = 1.90 x 1019 at 25.0 °C, Kp = __________. H2 (g) + Br2 (g) ↔ 2 HBr (g)

What is the pH at the equivalence point when 0.10 M HNO_3 is used to titrate a volume of solution containing 0.30 g of KOH?

You are asked to prepare a pH=4.00 buffer starting from 1.50 L of 0.0200 \; M solution of benzoic acid C_6 H_5COOH and an excess of sodium benzoate C_ H_5 COONa. How many grams of sodium benzoate should be added to prepare the buffer? Neglect the small vo...

what is the trigonometric form of z=1+i?

what is z= -2-2square root of 3i in trigonometric form.

The normal boiling point of bromine (Br2) is 58.8°C, and its molar enthalpy of vaporization is ΔHvap = 29.6 kJ/mol. Calculate the value of ΔS when 1.00 mol of Br2(l) is vaporized at 58.8°C.?

Consider the reaction 3CH_4(g)rightarrow C_3H_8(g)+ 2H_2(g). Calculate delta G at 298 K if the reaction mixture consists of 40atm of CH_4, 0.015atm of C_3H_8, and 2.3×10^−2atm of H_2.

Answers

The following answers were posted by visitors named Josh G..

I got 4.9*10^-3 M. Thanks and If the resulting solution has a volume of 1.9L , what is the minimum mass of CaSO4 (s) needed to achieve equilibrium?

both numbers negative

If ions O^2- are added to water, what reaction, if any, occurs?

what is z= -2-2square root of 3i in trigonometric form.

i got 6605kj but i think its too much.