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Aleksandr [31]
3 years ago
7

7. What is the potential energy of a rock that has a mass of 100 kg that is sitting on top of a hill 300 m high?

Chemistry
1 answer:
levacccp [35]3 years ago
7 0

Answer:

294000 J or 294 kJ

Explanation:

Potential energy is given by:

U=mgh

Where U is potential energy, m is mass, g is acceleration due to gravity, and h is height. Using this equation:

U=100(9.8)(300)\\U=294000

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How many grams are 0.5 moles of NaCl???
elena-14-01-66 [18.8K]

Answer:Respuesta. El peso molecular de NaCl es 58gr que equivale a 1 mol. g? hay 0,5mol queda 29gr

Explanation:

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3 years ago
How many formula units are there in 212 grams of mgCl2
AleksandrR [38]

Formula units are there in 212 grams of MgCl₂ are 830.56

Formula is the empirical of any ionic or covalent network solid compound used as an independent entity for stoichiometric calculations and it is the lowest whole number ratio of ions represented in an ionic compound

Here given data is

MgCl₂ = 212 grams

1 mole of magnesium chloride has mass = 95.211 gram and contains 6.022×10²³formula units of magnesium chloride

Here 212 grams×6.022×10²³form unit of MgCl₂/95.211 gram = 830.56

Know more about magnesium chloride

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4 0
1 year ago
Determine the molecular formula of a compound that is 49.48% carbon, 5.19% hydrogen, 28.85% nitrogen, and 16.48% oxygen. the mol
Softa [21]
To determine molecular formula, we first need to find out its empirical formula,
Carbon. Hydrogen. Nitrogen. Oxygen
Mass. 49.98g. 5.19g. 28.85g. 16.48g
Mole. 4.165. 5.19. 2.06. 1.03
Divide 4. 5. 2. 1
by
smallest
So by comparing the mole ratio from the table above, i hope u understand the table
The empirical formula is C4H5N2O
given molecular mass = 194.19g
so
(C4H5N2O) n= 194.19
(48+5+28+16)n=194.19
n= 2
molecular formula = C8H10N4O2
7 0
3 years ago
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7 0
3 years ago
Choose all the answers that apply. Which of the following are essential elements are the most abundant on earth and are essentia
Lynna [10]

Answer:

you answers are sodium and chloride oxygen

Explanation:

sodium

chloride oxygen

8 0
3 years ago
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