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Assignment:
Explain what a mass extinction is and list the major mass extinctions that have occurred over the history of the Earth. Use specific examples from the video: "The Day the Earth Nearly Died" to describe the impact of the Permian extinction event on life on Earth. Provide a detailed explanation for this mass extinction.
An unknown gas is found to effuse at a rate that is 1.864 times faster than Br2 at the same temperature. What is the identity of the gas.
Draw the structures and then List the following alkyl halides in order of their increasing reactivity as substrates in SN2 reactions
Explain why it is necessary to remove the Erlenmyer flask from the hot water bath at the moment the volatil liquid disappears
Problem- The concentration of copper (II) sulfate in one brand of soluble plant fertilizer is 0.070% by weight. If a 21.0g sample of this fertilizer is dissolved in 2.0 L of solution, what is the molar concentration of Cu2+
what is the molarity of a saturated solution of AgOH with a Ksp = 2.0 x 10^ -8
Calculate the mole fraction and partial pressure of each gas, and the total pressure in the tank. Be sure your answers have the correct number of significant
Write the balanced chemical reaction for the reaction between hydrochloric acid (HCl) and calcium hydroxide, Ca(OH)2 when the products of the reaction are calcium chloride, (CaCl2) and water (H2O)
A sample of NAOH weighing 0.38g is dissolved in water and the solution is made to 50.0 cm3 in a vol- what is the molarity?
a cylinder with a moveable piston contains 0.76 of gas and has a volume of 330 .what will its volume be if an
An unknown compound A, has a melting point 123 degreesC-124 degreesC. It is thought that Z is either B(reported 122 degreesC) or C(reported mp 125 degrees C. which compound (B or C) is most likely to be Z and why is that
How much heat in kilojoules is required to warm 10.0 of ice, initially at -10.0, to steam at 125. The heat capacity of ice is 2.09 and that of steam is 1.84 .
A thermometer containing 9.5 of mercury has broken. If mercury has a density of 13.6 , what volume spilled
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