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TRIGONOMETRIE Vraag 7 7.1 Teken die volgende grafieke vir x ∈ [–180°; 180°]:

Describe the difference between traditional line authority and staff authority. Provide an example of this difference.

Determine the amount of energy required to heat a 56.0 gram sample of ethanol from 28°C to 73°C. The specific heat of ethanol is 2.46 .

Which set of gaseous reactants below can be combined as is to measure the standard heat of formation of NF3?

A titration is run to find the concentration of a 75.0 mL sample of H2SO4. If 43.8 mL of 3.0 M KOH is needed to completely react the H2SO4 according to the reaction below, determine the concentration of the H2SO4 solution. H2SO4 (aq) + 2 KOH (aq) 2 H2O (l) + K2SO4 (aq)

Use the following equations to determine the ∆Hrxn of the reaction, A2 (g) + F (s) -> 3 B (l). A2 (g) + 2 C(s) -> B (l) + D (l)         ∆H= + 58 kJ C (s) + B (g) -> 1/2 D (l) + 1/2 F (s) ∆H= +94 kJ B (g) -> B (l)                                              ∆H= -45 kJ

A titration is run to find the concentration of a 15.0 mL sample of H2SO4. If 43.8 mL of 1.8 M KOH is needed to completely react the H2SO4 according to the reaction below, determine the concentration of the H2SO4 solution. H2SO4 (aq) + 2 KOH (aq) 2 H2O (l) + K2SO4 (aq)

Complete combustion of 1.0 mol of a hydrocarbon containing only carbon and hydrogen results in the following combustion mixture. Determine the empirical formula of the hydrocarbon.

A titration is run to find the concentration of a 25.0 mL sample of H2SO4. If 43.8 mL of 3.5 M KOH is needed to completely react the H2SO4 according to the reaction below, determine the concentration of the H2SO4 solution. H2SO4 (aq) + 2 KOH (aq) 2 H2O (l) + K2SO4 (aq)

Use the following equations to determine the ∆Hrxn of the reaction, A2 (g) + F (s) -> 3 B (g). A2 (g) + 2 C(s) -> B (l) + D (l)         ∆H= + 58 kJ C (s) + B (g) -> 1/2 D (l) + 1/2 F (s) ∆H= +94 kJ B (g) -> B (l)                                              ∆H= -45 kJ