Butane (c4h10) undergoes combustion in excess oxygen to generate gaseous carbon dioxide and water. given δh°f[c4h10(g)] = –124.7

The result is 324.3 grams. In this problem, we have 6.0 moles of nitrous acid and need to convert it into grams. This conversion requires multiplying the moles by the molar mass of the substance. Molar mass is computed from the formula mass, with atomic masses of each constituent atom multiplied by their subscripts. For instance, A single nitrogen atom and a single oxygen atom yield the molar mass of the formula calculated as: atomic mass of N + 2(atomic mass of O) = 14 + 2(16) = 14 + 32 = 46 gram per mol. This molar mass indicates that 1 mole of the compound weighs 46 grams. Now let’s compute the molar mass of nitrous acid similarly. Its molar mass would be 1 + 14 + 2(16) = 1 + 14 + 32 = 47 grams per mol. Subsequently, the grams equivalent of 6.9 moles of nitrous acid calculates to 324.3 g.

80 g. Explanation: In the metal alloy, the weight percent of antimony can be determined using the formula wt% = (mass of compound/mass of alloy)×100. Since we have 16% = (grams of antimony / grams of alloy)×100, simplifying gives us 0.16 = grams of antimony / grams of alloy, and therefore if the alloy is 500 g, it leads us to the conclusion that the weight of antimony is 80 g.

The isotopic mass of 47Z is calculated to be 46.96 amu. Isotopes of a single element differ in neutron count, and to ascertain the relative atomic mass, we consider each isotope's mass weighted by their natural abundance. This provided a computation to derive the mass of 47Z.

Elemental zinc replaces copper

Explanation:

During this reaction, the zinc added to the copper sulfate solution has replaced the copper present in the compound.

This process is known as a single displacement reaction.

                      Zn + CuSO₄     →   ZnSO₄    +  Cu

This represents the reaction in the recycling process.

The reaction is influenced by the elements' positions within the reactivity series of metals.

• In a single displacement reaction, an element higher in the reactivity series displaces one that is lower.
• Zinc ranks above copper in this series, allowing it to react with sulfate.
• Consequently, copper is pushed out as a solid product in the solution.
• Elements positioned higher in this series exhibit greater reactivity

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Chemical reaction

Density is defined as the mass-to-volume ratio. The formula for density can be expressed as:

   -(1)

The density for carbon tetrachloride is provided as   (given).

The mass of carbon tetrachloride is   (as given).

Since,

Thus,

Utilizing the values in formula (1):

Since,

Hence,

The resulting volume of carbon tetrachloride is .