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Vladimir79 [104]
3 years ago
5

Nick hypothesizes that wax has a higher melting point than chocolate how can he test his hypothesis

Chemistry
1 answer:
LUCKY_DIMON [66]3 years ago
5 0
Melt chocolate and measure the temperature and then melt wax and measure the temperature and compare his results.
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What is the mass of 3.00 moles of magnesium chloride, MgCl2? Express your answer with the appropriate units.
xenn [34]
<span>To find the mass of 3.00 moles of magnesium chloride (MgCl2), first record the atomic mass of magnesium (Mg) and chloride (Cl), which are both listed on the periodic table as follows: Mg=24 g/mole Cl=38 g/mole Now, double the Cl mass since there are 2 Cl moles in MgCl2 and then add it to the Mg mass like so: (38 g/mole*2 moles)+24 g/mole=100 g/mole Finally, to calculate the mass of 3.00 moles of MgCl2, convert the combined atomic mass to grams as follows: 3.00 moles * 100 g/mole = 300 g</span>
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Given the balanced chemical equation, SiO2(s) + 4 HF(g) → SiF4(g) + 2 H2O(l) ΔH°rxn = −184 kJ Determine the mass (in grams) of H
Ostrovityanka [42]

Answer:

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Molar mass of H:  1.0079 g/mol
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Then, just add it up:
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