Search & Filtering
lingis
A reaction has a rate constant, k = 1.29 s-1. What is the half-life (seconds) when the initial concentration is 0.784 M?
Describe the assessment requirements for mathematics in intermediate. Use heading included in the CAPS document.
Read the first topic in the annual teaching plan or the syllabus for mathematics in intermediate subject. List the knowledge, skills and values learners should have after completing this topic.
Direction: Solve the following problems. Attach your solutions.
1. Calculate the standard enthalpy ∆H°, for the following reaction:
2CH3OH (l) + 3O2 (g) ---> 2CO2 (g) + 2H2) (g)
Given: CH3OH (l) ∆Hf° = - 238.7 kJ
CO2 (g) ∆Hf° = - 393.5 kJ
H2O (l) ∆Hf° = - 285.8 kJ
Essay.
Water, compared to other substances, has one of the highest specific heat values. What is the advantage of this fact for the human body?
How did the South order and construct their society, and what role did white
superiority play in that construction?
1. Calculate the enthalpy change for the following chemical reaction:
CS2(1) + 3O2(g) ---> CO2(g) + 2SO2(g)
1.C(s) + O2(g) ---> CO2(g) ∆H° = - 393.5 kJ
2.S(s) + O2(g) ---> SO2(g) ∆H° = - 296.8 kJ
4.C(s) + 2S(s) ---> CS2(1) ∆H° = + 87.9 kJ
A certain population has a variance of 2.5, and a sample size of 4 is used to obtain the sampling distribution of the sample mean of this population. What is the variance of the sampling distribution of the sample mean?
Write your answer as a fraction in lowest terms.
Calculate the ΔH of the following problems.
1. How many joules are required to raise the temperature of 450 mL of water from 30°C to 100°C?
2. The specific heat of copper metal is 0.385 J/g-°K. How many kJ of heat are needed to raise the temperature of 1.1 kg block of copper from 27.5°C to 50°C?
State the requirements as listed in electronic communications and transactions ACT 25 of 2002 for an originated transaction to be valid
#339914 on Dec 2023