How long does it take for 89% of phosphine to decompose
The half-life for the reaction at 550C is 81.3 seconds. How long does it take for 89% of phosphine sample to decompose?
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The contents of one 40-lb bag of topsoil can cover 10.0 square feet of ground to a depth of 1.0 in. How many bags are needed to cover a plot that measures 200.0 meters by 300.0 meters to a depth of 4.0 cm?
A portable water heater transfers 225 watts of power to 5.5 L of water. How much time will it take the water heater to heat the 5.5 L of water from 22 to 40 degrees Celsius?
Given this Ksp for lead(II) chloride, find the molar solubility of this salt in a 0.05M of CaCl2 solution. Will Ca(OH)2 prrecipitate if a 0.1M solution of CaCl2 is added to a solution with a pH of 10.7?
The 20 mm diameter steel rod BC is attached to the lever AB and to the fixed support C shown in Fig 9. The uniform steel lever is 100 mm thick and 30 mm deep.
90-g sample of a large biomolecule was dissolved in 23.0 g of carbon tetrachloride. The boiling point of this solution was determined to be 77.85°C. Calculate the molar mass of the biomolecule.
A student who carried out this reaction obtained 2.7 g of ferrocene. What was the percent yield for this reaction?
Which of the following substances (with specific heat capacity provided) would show the greatest temperature change upon absorbing 100.0 J of heat?
A strip of electrolytically pure copper weighing 3.178 gram is strongly heated in a stream of oxygen until it is all converted to a black oxide. The resultant black powder weighs 3.978 g. What is the formula of the oxide?
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Please provide a response with APA citations and references to "When discussing topics like abnormal behavior, the questions we ask carry a lot of weight.
Please provide a response with APA citations and references to "Correlational research has one significant disadvantage: it cannot prove cause and effect.
Post a description of your thoughts on the fairness and effectiveness of school drug-testing programs for adolescents.
Explain what depression is. Then, identify and describe at least three signs of depression in adolescents, and two strategies professionals
Theory-to-empirical frameworks emphasize the need to understand how individuals interpret systems and environments
What word have we learned that describes the way Devon says he acts towards women with his claim to want to have sex with them all
Problem: What parts of the brain (neurotransmitters) are positively impacted by these drugs - to explain the paragraph: