Master Chemistry with Fun Quizzes & Brain Teasers!

Suppose a 20.0 g gold bar at 35.0C absorbs 70.0 calories of heat energy. Given that the specific heat of gold is 0.0310 cal/g C, what is the finaltemperature of the gold bar?
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Sound waves move the slowest through which medium :watericeairwood
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What are the main properties of matter?
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What is the mass number, symbol, and charge of an atom that contains 19 protons, 20 neutrons and 19 electrons?
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How many moles are in 8.8 x 1024 atoms of magnesium?
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Calculate the number of water molecules formed of 0.562 moles of oxygen gas in 2 H2 (g) + 1 O2 (g) 2 H2O (g)
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Dissolution of wax in kerosene
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How many moles of H2O are in 4.00 L of water?
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3. When two atoms bond together to form a molecule, which parts of the atomsbecome part of the bond?
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How is energy related to the change of state representedby the model?Atoms gain energy as a solid changes to a liquid.Atoms gain energy as a solid changes to a gas.O Atoms lose energy as a solid changes to a liquid.O Atoms lose energy as a solid changes to a gas.
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What is described by the VSEPR theory?O A. The arrangement of atoms in a moleculeB. The oxidation numbers of atoms in a moleculeC. The kind of bonds formed in a moleculeO D. The outside forces operating on a molecule
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Determine the number of moles of oxygen gas (O2) that are needed to react with 0.725 moles of aluminum (Al).4Al (s) + 3O2 (g) 2Al2O3 (s)
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5.0 x 104 ml of gasoline is added to a boat that weighs4.5 kg. What will be the mass of the boat with the added gasoline?
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Which type of model would you use to describe the parts of a plant? Why did you choose this model as the best type for describing your item?
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2.1.695 x 104 - 1.395 x 1015 =
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Complete and balance the molecular equation for the reaction between aqueous solutions of strontium hydroxide and lithium phosphate, and use the states of matter to show if precipitate forms.
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Which of the following notations is the correct noble gas configuration forCo?A. [Ar]48237B. [Ar]4524p63dO C. [Kr]4s24p64dD. [Co]48237
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Describe the composition of Earths atmosphere
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Calculate the frequency of red light that has a wavelength of 700 nm.
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How much energy is required to heat the solid iron from 1535 C to 2000 C?
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What is the pH of a 8.4 x 10 6 M H + solution?
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PLEASE HELP ASAP ITS DUE IN THE NIGHT Energy is converted between different forms- watch the video below, then describe how energy is converted when you listen to music through headphones. Your answer should include four different energy forms
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Find the volume of a cereal box that has the dimensions of 35.2 cm x 220 cm x 6.0 cm
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How many different crystalline structures exist?A.4B.6C.8D.12
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