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Dmitriy789 [7]
3 years ago
9

Lokesh is sawing boards to make a deck. What is the area of the deck?

Chemistry
2 answers:
dezoksy [38]3 years ago
8 0

Answer:

Explanation:

171

Alekssandra [29.7K]3 years ago
4 0

Answer: The answer would be B. 171 square feet

Explanation:

I took the test and got it right / Hope it helps!:)

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Which of the following statements is true? Protons have a mass that contributes significantly to the mass of the atomic nucleus.
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The following statements from the paragraph are true. Protons have a mass that contributes significantly to the mass of the atomic nucleus. Neutrons have a mass that contributes significantly to the mass of the atomic nucleus. Electrons have a very low mass and are not found in the nucleus but instead are found in surrounding orbits.
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What type of bond is present between two atoms of tungsten in a light bulb filament?
stiks02 [169]

Answer:

ionic bonding

Explanation:

hope it helps

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3 years ago
How many molecules units are in 4.5 moles of CF4
kobusy [5.1K]
1.0 mole ---------- 6.02x10²³ molecules
4.5 moles -------- ?

4.5 * 6,02x10²³ / 1.0

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What is the name of the compound CO?
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7 0
3 years ago
Read 2 more answers
A very simple assumption for the specific heat of a crystalline solid is that each vibrational mode of the solid acts independen
MatroZZZ [7]

Answer:

4.7 kJ/kmol-K

Explanation:

Using the Debye model the specific heat capacity in kJ/kmol-K

c = 12π⁴Nk(T/θ)³/5

where N = avogadro's number = 6.02 × 10²³ mol⁻¹, k = 1.38 × 10⁻²³ JK⁻¹, T = room temperature = 298 K and θ = Debye temperature = 2219 K  

Substituting these values into c we have

c = 12π⁴Nk(T/θ)³/5  

= 12π⁴(6.02 × 10²³ mol⁻¹)(1.38 × 10⁻²³ JK⁻¹)(298 K/2219 K)³/5

= 9710.83(298 K/2219 K)³/5

= 1942.17(0.1343)³

= 4.704 J/mol-K

= 4.704 × 10⁻³ kJ/10⁻³ kmol-K

= 4.704 kJ/kmol-K

≅ 4.7 kJ/kmol-K

So, the specific heat of diamond in kJ/kmol-K is 4.7 kJ/kmol-K

7 0
3 years ago
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