developing country. A country such as Germany is a developed country because it has a negative rate of natural increase. The rate of natural increase is the crude birth rate minus the crude death rate of a population. The rate of natural increase for Uganda is 3%. The doubling time for Uganda is 23 years. The doubling time for Germany is that ere is no doubling time. This is because Germany’s rate of natural increase is -0.2%. Uganda’s GDP is $1‚390‚ GDP is the average salary for one person‚ in one year
Premium Health care Demography Population
1. Describe the nuclear fusion reaction that occurs in stars. Page 294 Stars are made primarily of the almond hydrogen the most common material universe. As a star forms‚ gravity pulls the hydrogen into a dense ball that heats up. Electrons are torn from the hydrogen and other atoms‚ creating a plasma made up primarily of protons (the nucleus of the hydrogen atom) and electrons. Normally‚ protons would repel each other. As matter accumulates ending the new star however‚ the protons move
Premium Star Energy Hydrogen
One of the effect of imposing minimum wage to the economic is poverty rate increase. Most of the people will think that if a firm pay their low wage employees more‚ so the workers will earn more and will not live in poverty. That is an incorrect statement. When government raise the minimum wage‚ the firms will incur more expenses due to they have to pay more on the wages. Therefore‚ the firms will have 2 options. First‚ they hire less worker and use machine to replace the workers. With this option
Premium Employment Minimum wage Wage
Investigate the effect of concentration on the rate of a reaction Research question: To what extent does the concentration of hydrochloric acid affect the rate of the following reaction: 2 HCl(aq) + CaCO3(s) → CaCl2(aq) + H2O(l) + CO2(g) Data Collection and Processing: Table1: Different volumes of Co2 gas produced by Different concentrations of HCL acid. Volume of CO2gas formed from 5 different concentrations of HCL acid ±0.5ml 5 different concentrations of HCL acid (Mol) ±0.5ml Time (sec) ±0
Premium Chemical reaction Chemistry Chlorine
and neutralise stomach acid. Planning Aim To determine how the surface area of the tablets affects the rate of the reaction. To determine which form of tablets gives the biggest surface area resulting in the fastest reaction rate. Investigation question: What is the relationship between the total surface area of the tablets and the rate of the reaction? Hypothesis: The rate of reaction will be the fastest when the tablets crushed into powder as there is a bigger total surface area resulting
Free Chemical reaction Chemical kinetics Hydrochloric acid
Top of Form 1. What is the pH of a buffer that results when 33 g NaHCO3 is mixed with 100.0 mL of 2.50 M NaOH and diluted with water to 250 mL? (Ka for HCO3- = 4.8 10-11) (Points : 10) 8.20 10.07 10.12 10.32 10.56 2. What is the pH of an aqueous solution of 0.30 M HF and 0.15 M F-? (Ka of HF = 7.2 10-4) (Points : 10) 1.83 2.84 3.14 3.44 10.86 3. Which of the following mathematical expressions
Premium Acid dissociation constant
Aim: To determine the rate law of chemical reactions Introduction: The aqueous solution of potassium peroxydisulphate can oxidize potassium iodide as follow: Equation: K S 0 (aq) + 2KI (aq)->2K S0 (aq)+I (aq) 2 2 8 2 4 2 KI(aq) +I (aq) -> KI (aq) 2 3 _________________________________________________ K S 0 (aq) +3KI(aq) -> 2K S0 (aq)+ KI (aq) 2 2 8 2 4 2 The rate law of this reaction can be represented as follow: Rate=k[S208 2-]^a [I-]^b When the concentration of peroxydisulphate ions
Premium Chemistry Chemical reaction
Does concentration affect the speed of chemical reactions? Problem: We are proving that “concentration” (the amount of reactants) is one of the things that can affect the speed of chemical reactions. We are also finding a way to keep the lid on the film canister for the longest period of time. We are using vinegar and water as reactants and changing the concentration every time to see the difference between the rates of reactions speed. Materials: - 1 graduated cylinder - 1 film canister
Premium Chemical reaction Chemical engineering Reaction rate
The reaction order‚ based on the rate law‚ was first order with respect to crystal violet and second order with respect to OH-. The rate law was as follows: Rate law = k [CV]1[OH-]1 where k equaled 2.61. In order to determine the reaction order with respect to crystal violet‚ the graph that described the relationship between ln[CV] and time (seconds) was Figure 2. Not only did Figure 2 generate a more linear relationship‚ but it had the highest R2 value of 0.992 than ([CV] versus time) and ([1/CV]
Premium Chemical reaction Rate equation Reaction rate
Compare the Rate of Carbon Dioxide Production by Yeast under Anaerobic Conditions using different Carbohydrate Substrates. Hypothesis. The hypothesis that I draw is that "" out the five carbohydrate substrates that I will use‚ Glucose will produce the highest volume of Carbon Dioxide at every five-minute interval. Null Hypothesis. The null hypothesis that I am composing is that "" the five carbohydrate substrates that I am to use will not produce any Carbon Dioxide. Scientific Research. Under
Premium Carbon dioxide Enzyme Glucose