Chemistry Answers

muito interessante por um longo tempo

_________________

Site da empresa 1xbet - [url=https://kazinow.site/171.html]previsГЈo da liga esportiva[/url], previsГЈo para a 5ВЄ rodada do campeonato russo de futebol 2019 2019

1) As a group, place each cotton ball in each beaker of equal amount of propanol, acetone (propanone), and water. Squeeze to remove excess liquid. 2) Wipe or dab the cotton balls in the appropriate box on the loose paper at the same time. 3) Observe the rate of evaporation for each liquid. 4) Record your observations here.

14.Calculate the energy required to remove the electron from a hydrogen atom in itsground state.

When 0.344 mol of HCl is combined with enough water to make a 450.0 mL solution, the concentration of HCl is ________ M.

Question 8 options:

1) 

7.64 × 10^-4

2) 

0.155

3) 

1.31

4) 

0.764

5) 

0.344

Write a balanced equation for the overall cell reaction and calculate the standard cell potential, E^0cell.

A. Half-reactions: Cd^2+(aq) + 2e^- —> Cd(s) Cr^2+(aq) + 2e^- —> Cr(s)

Cell reaction:

E^0 cell

B. Half-reactions: Fe^2+(aq) + 2e^- —> Fe(s) Br2(g) + 2e^- —> 2Br^-(aq)

Cell reaction:

E^0cell

A lead (Pb) pellet having a mass of 26 point 47 g at 89.98 degrees celsius was placed in a constant pressure colorimeter of negligible heat capacity containing 100.p ml of water the water temperature rose from the 22.50 degrees celsius to 23.17 degrees celsius what is the specific heat of the lead pellet?

Write the correct name for each of the following structures.

CH3CH2CH = CHCH2CH2CH = CH2

CH3CH2C = CCH2CH3

Which of the following cells will produce the highest voltage? SHOW YOUR WORK.

a. Mn I Mn^2+ II Zn^2+ I Zn

b. Zn I Zn^2+ II Ni^2+ I Ni

c. Ni I Ni^2+ II Cu^2+ I Cu

Solve separately then write which one will produce the highest voltage.

How would you prepare 400 ml of a 0.24 M NaCl solution (MW = 58.44 g/mole) 

How many milliliters from a 6.00 M H2SO4 solution would need in order to prepare 50 mL of 2.00 M H2SO4?