Topic
Q:
10. Cuando se intenta nombrar un compuesto se
debe tener en cuenta los estados de oxidación de los
elementos y que estos por regla al sumarlos deben
dar cero. Con base en esto, el estado de oxidación
del Cr en el compuesto \( \mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7} \)
es:
\( \begin{array}{ll}\text { A. }+1 & \text { C. }+7 \\ \text { B. }-6 & \text { D. }+6\end{array} \)
Q:
MULTIPLE CHOICE QUESTION
How many different elements are in this
compound?
Q:
The following reaction reaches equilibrium in an enclosed container:
\( 2 \mathrm{CO}(\mathrm{g})+\mathrm{O}_{2}(\mathrm{~g})=2 \mathrm{CO}_{2}(\mathrm{~g}) \)
Some CO gas is added to the reaction mixture. How will the amount of \( \mathrm{CO}_{2} \) be affected as the reaction returns to equilibrium?
(A) increase
(B) Decrease
(C) Remain the same
Q:
Determine the sign of the free energy for the following reaction. How would its spontaneity be described?
\( \mathrm{CH}_{4}(\mathrm{~g})+2 \mathrm{O} 2(\mathrm{~g}) \rightarrow \mathrm{CO}_{2}(\mathrm{~g})+2 \mathrm{H}_{2} \mathrm{O}(\mathrm{g}) \quad \Delta \mathrm{H}=-890.3 \mathrm{~kJ} / \mathrm{mol} ; \quad \Delta \mathrm{S}=+186.3 \mathrm{~J} / \mathrm{mol}-\mathrm{K} \)
A Spontaneous at all temperatures
B Spontaneous at low temperatures only
(C) Spontaneous at high temperatures only
(D) Not spontaneous at any temperature
Q:
A student places 0.88 mol of NaCl in a beaker and adds enough water to form 1.55 L of solution. What is the molarity of the
solution?
Q:
A student places 0.88 mol of NaCl in a beaker and adds enough water to form 1.55 L of solution. What is the molarity of the
solution?
Add vour answer
Q:
A 2.65 g sample of potassium nitrate is dissolved in 114 g of water. What is the percent mass by mass for the resulting solution?
Add your answer
Q:
A sample of magnesium sulfate is placed in a beaker. Water is added and the mixture is stirred, creating a solution. Which
substance is the solute, and which is the solvent?
A) Magnesium sulfate is the solute; water is the solvent.
B Magnesium sulfate is the solvent; water is the solute.
(C) Both magnesium sulfate and water are solutes.
(D) Both magnesium sulfate and water are solvents.
Q:
4) Las concentraciones de iones de hidrógeno en los quesos van desde \( 4 \times 10^{-7} \mathrm{M} \) hasta
\( 1,6 \times 10^{-5} \mathrm{M} \). Determinar el rango correspondiente en las lecturas del pH.
Q:
A 9 L cylinder of hydrogen contains gas molecules under 9.12 atm and 284 K . How many moles of hydrogen does the cylinder
contain?
Ask Tutors
Ask AI
10x
Fastest way to Get Answers & Solutions
By text
Enter your question here…
By image
Re-Upload
Uploaded Files
xxxx.png0%
Submit
