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scoundrel [369]
3 years ago
10

If an object has a volume of 5 mL and a mass of 50 g, what is the density of the object?

Chemistry
1 answer:
mr Goodwill [35]3 years ago
6 0
Using the formula density = mass ÷ volume, I got my answer as 10g/cm^3 or 10g/mL
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The combustion of methanol (CH4O) is described by this balanced chemical equation: 2CH4O(g) + 3O2(g) → 4H2O(g) + 2CO2(g) Methano
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Two moles of methanol to three moles of oxygen
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3 years ago
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The different unit cell types have a different packing efficiency. The simple cubic has the least efficient packing and the face
kozerog [31]

Answer:

The answer is "52.8".

Explanation:

Please find the graph file in the attachment.

They have the atoms in 8 corners with one unit cell in an one so mesh (SCC).

Atoms throughout the corner contribute \frac{1}{8}to both the cell unit

Atom number per SCC unit cell, Z = (8 \times \frac{1}{8}) = 1

Let 'r' become the atom's radius.  r = 3.43\times 10^{-8}\ \ cm

We can see from the diagram that edge length AB = a = 2r

Packing\  efficiency = \frac{(1 \ atom \ Volume  \times Z)}{Volume \ of \ unit\ cell \times  100}\\\\

                                 = \frac{\frac{4}{3}\times \pi \times r^3 \times 1}{a^3 \times 100}\\\\=\frac{\frac{4}{3}\times \pi \times r^3 \times 1}{(2r)^3 \times 100}  \\\\=\frac{\frac{4}{3}\times \pi \times( 3.43\times 10^{-8}cm)^3 \times 1}{(2\times 3.43\times 10^{-8}cm)^3 \times 100}\\\\= 52.8 \%

7 0
3 years ago
Which of the following statements about the sun's structure is true?
coldgirl [10]

Here is your answer:


The answer is option C "The sun's interior is similar to the Earth's; it has a core, mantle, and crust." Both Earth and the sun has a similar interior including a core, and the mantle but has a hotter surface.


Hope this helps!


<em>~Nonportrit</em>

4 0
4 years ago
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4. How much energy will it take to raise the temperature of 75.0 g of water from 20.0 °C to 55.0 °C?
mel-nik [20]

Answer:

1.1 x 10⁴ J

Explanation:

To calculate eth energy needed, you need to use the following equation:

Q = mcΔT

In this equation,

-----> Q = energy/heat (J)

-----> m = mass (g)

-----> c = specific heat (4.184 J/g°C)

-----> ΔT = change in temperature (°C)

You can plug the given values into the equation and solve.

Q = mcΔT

Q = (75.0 g)(4.184 J/g°C)(55.0 °C - 20.0 °C)

Q = (75.0 g)(4.184 J/g°C)(35.0)

Q = 11,000 J

Q = 1.1 x 10⁴ J

3 0
2 years ago
Stable carbon isotopes of c3 plant resins and ambers record changes in atmospheric oxygen since the triassic:
kumpel [21]
Estimating the partial pressure of atmospheric oxygen (pO 2) in the geological past has been challenging because of the lack of reliable proxies. Here we develop a technique to estimate paleo-pO 2 using the stable carbon isotope composition (δ 13 C) of plant resins—including amber, copal, and resinite—from a wide range of localities and ages (Triassic to modern). Plant resins are particularly suitable as proxies because their highly cross-linked terpenoid structures allow the preservation of pristine δ 13 C signatures over geological.

Hope this helps.
8 0
4 years ago
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