Master Chemistry with Fun Quizzes & Brain Teasers!

A metal sample weighs 56.8 grams. How many ounces does this sampleweigh? (1 lb = 16 oz)
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3. Which phase change requires the removal of energy? *(1 Point)condensationevaporationmeltingsublimationanswer quick pls
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what might happen to variables in a science experiment that would lead to unusable results?
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why does it take more energy to evaporate water than to melt ice?
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10 uses of water good answer
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CCC Energy and Matter Recall that force = mass x acceleration. Explain why theacceleration of a model rocket increases over time, even if the force from theburning of the rocket fuel remains constant.
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Use the Rydberg Equation to calculate the energy in Joules of the transition between n = 7 and n = 3 for the hydrogen atom. Find the frequency in Hz of this transition if the wavelength is 1000nm.
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if you wanted to measure in irregular object's volume, which device would you use?
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How many moles of gold, a U, are in 3.6010^-5 G of gold?
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1. Compare and contrast the characteristics of metals and nonmetals.2. Describe the electrochemical series and why its important in understanding metals.3. Describe the theory of ionization in regard to acids and bases.4. Identify the role of indicators.
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please help if you can. thank you.
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5. What causes a moving object to change direction?A. AccelerationB. VelocityC. InertiaD. Force
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what is the cell cycle? plz help, ASAP
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How many moles of HNO3 are present in 697 grams of HNO3?
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How many atoms are there in 4.13 moles of nickel (Ni)
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How many atoms are there in 4.13 moles of nickel (Ni)
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it is the main factor of contact metamophism.
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How much acceleration does a 10 kg object have if pushed by a 75 N force?
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what is a limitation of using a chemical formula, such as C6H12O6, to represent a compound? A.The chemical formula does not show the types of elements that make up the compound.B.The chemical formula does not show how the atoms are connected to one another.C.The chemical formula does not show the number of atoms of each element in a molecule.D.The chemical formula does not show the chemical symbols of the elements in the compound.
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Peroxyacylnitrate (PAN) is one of the componentsof smog. It is a compound of C, H, N, and O.Determine the percent composition of oxygen andthe empirical formula from the following percentcomposition by mass: 19.8 percent C,2.50 percentH, 11.6 percent N. What is its molecular formulagiven that its molar mass is about 120 g?
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2. Why would a calcium (Ca) atom be larger than a bromine (Br) atom eventhough they both have 4 energy levels? *
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3. Why do elements in group 1-17 react to form bonds?
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What is an extremophile? What domain is known for these organisms?
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Mark all correct answers. Which of the following statements correctly describes plasmas
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