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zhuklara [117]
2 years ago
11

Why does an ice cube melt when you hold it in your hand?

Chemistry
2 answers:
Ede4ka [16]2 years ago
8 0

heat is transferred from your hand to the ice cube

aniked [119]2 years ago
5 0

Answer:

Heat is transferred from your hand to the ice cube.

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1) The names of the molecules

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Since the number of atoms in the reactants is the same that the number of atoms in the products, the chemical equation is balanced.

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1 year ago
How many moles of H2SO4 are needed to completely neutralize 0.0164 mol KOH
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When 1.00 g of boron is burned in o2(g) to form b2o3(s), enough heat is generated to raise the temperature of 733 g of water fro
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<span>Answer: For this problem, you would need to know the specific heat of water, that is, the amount of energy required to raise the temperature of 1 g of water by 1 degree C. The formula is q = c X m X delta T, where q is the specific heat of water, m is the mass and delta T is the change in temperature. If we look up the specific heat of water, we find it is 4.184 J/(g X degree C). The temperature of the water went up 20 degrees. 4.184 x 713 x 20.0 = 59700 J to 3 significant digits, or 59.7 kJ. Now, that is the energy to form B2O3 from 1 gram of boron. If we want kJ/mole, we need to do a little more work. To find the number of moles of Boron contained in 1 gram, we need to know the gram atomic mass of Boron, which is 10.811. Dividing 1 gram of boron by 10.811 gives us .0925 moles of boron. Since it takes 2 moles of boron to make 1 mole B2O3, we would divide the number of moles of boron by two to get the number of moles of B2O3. .0925/2 = .0462 moles...so you would divide the energy in KJ by the number of moles to get KJ/mole. 59.7/.0462 = 1290 KJ/mole.</span>
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3 years ago
All objects emit and absorb electromagnetic radiation.
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All objects DO emit and absorb electromagnetic radiation. therefore, true.
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