IdeasCuriosas - Every Question Deserves an Answer Logo

Questions in chemistry

[Answered] Yeast solution, hydrogen peroxide, and dish soap were mixed in different quantities in four cups. The height of the foam produced was measured at 2, 4, and 6 minutes. The results are shown in the table below. | Cup | Yeast solution | Hydrogen Peroxide | Dish Soap | Height of foam produced at 2 minutes (cm) | Height of foam produced at 4 minutes (cm) | Height foam produce at 6 minutes (cm) | |---|---|---|---|---|---|---| | A | 1 tbsp | None | 1 tsp | | | | | B | 1 tbsp | 1 tbsp | 1 tsp | | | | | C | 1 tbsp | 2 tbsp | 1 tsp | | | | | D | 1 tbsp | 3 tbsp | 1 tsp | | | |

[Answered] Which type of reaction has the general formula of [tex]$AB + CD \rightarrow AD + CB$[/tex]? A. synthesis B. decomposition C. oxidation D. replacement

[Answered] The standard reaction free energy [tex]$\Delta G^0=29 . kJ$[/tex] for this reaction: [tex]$Fe_2 O_3(g)+2 H_2(g) \rightarrow 2 Fe(s)+3 H_2 O(l)$[/tex] Use this information to complete the table below. Round each of your answers to the nearest kJ. | reaction | [tex]$\Delta G^0$[/tex] | |---|---| | [tex]$2 Fe _2 O _3(g)+4 H _2(g) \rightarrow 4 Fe ( s )+6 H _2 O ( l )$[/tex] | -12 kJ | | [tex]$\frac{2}{3} Fe ( s )+ H _2 O ( l ) \rightarrow \frac{1}{3} Fe _2 O _3(g)+\frac{2}{3} H _2(g)$[/tex] | 12 kJ | | [tex]$2 Fe ( s )+3 H _2 O ( l ) \rightarrow Fe _2 O _3(g)+2 H _2(g)$[/tex] | 29 kJ |

[Answered] What is the correct formula for the ionic compound that would result from the combination of sodium and phosphorus? A. $Na _3 P$ B. $Na _3 Ph$ C. $NaP _3$ D. $S _3 P$

[Answered] Match column I with column II and select the correct option using the given codes. | Column I | Column II | | :---------------------------------------------- | :------------------------------------------------------------ | | a. A metal that forms amphoteric oxides | (i) Ga | | b. A metal which melts when kept on our palm | (ii) / M | | C. A metal that reacts with nitric acid | (iii) AI | | d. A metal which cannot displace hydrogen from acids | (iv) Mn | A. $a =$ (ii), $b =$ (i), $c =$ (iii), $d =$ (iv) B. $a =$ (iii), $b =$ (i), $c =$ (iv), $d =$ (ii) C. $a=$ (iv), $b=$ (ii), $c=$ (iii), $d=$ (i) D. $a =$ (iii), $b =$ (ii), $c =$ (j), $d =$ (iv)

[Answered] In this reaction, 28.5 g of silver nitrate reacts with 16.7 g of barium sulfate. What will be the mass of the products? [tex]AgNO_3+BaSO_4 \rightarrow \text { Products }[/tex]

[Answered] Consider the following equilibrium: [tex]2 NOCl(g) \rightleftharpoons 2 NO(g)+Cl_2(g) \quad \Delta G^0=41 . kJ[/tex] Now suppose a reaction vessel is filled with 8.06 atm of nitrosyl chloride ([tex]NOCl[/tex]) and 7.44 atm of chlorine ([tex]Cl _2[/tex]) at [tex]1171 .{ }^{\circ} C[/tex]. Answer the following questions about this system: Under these conditions, will the pressure of [tex]Cl _2[/tex] tend to rise or fall? Is it possible to reverse this tendency by adding NO? In other words, if you said the pressure of [tex]Cl _2[/tex] will tend to rise, can that be changed to a tendency to fall by adding NO? Similarly, if you said the pressure of [tex]Cl _2[/tex] will tend to fall, can that be changed to a tendency to rise by adding NO? If you said the tendency can be reversed in the second question, calculate the minimum pressure of NO needed to reverse it. Round your answer to 2 significant digits.

[Answered] What happens when 3 molecules of hydrogen chemically react with 3 molecules of oxygen?

[Answered] Label the following as soluble or insoluble in water: a. AgCl b. NH4NO3 c. Ca(OH)2 d. BaSO4 e. AlPO4

[Answered] What is the formula for the ammonium ion? $NH _3$ $AmO ^{+}$ $Am ^{+}$ $NH _4{ }^{+}$