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Bad White [126]
3 years ago
14

Use the chemical reaction: 2Mg + O2 > 2MgO to answer the question below.

Chemistry
1 answer:
Arturiano [62]3 years ago
5 0
10 mols of MgO will form
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two sides of a triangle have the following measures . Find The range of possible measures for the tird side
crimeas [40]
To find the third side you would use Pythagorean theorem which is a²+b²=c². 

A and B being the 2 legs and C being the hypotenuse.
 
Example: ( sorry for the really odd not really a triangle, triangle...)
  |  \
6|     \  ?                    6²+9²=C²
  |_______              36+81=C²
        9                             117=C²
                               √117=10.8 (rounded) 

if you need to get the leg you just fill in the numbers.



3 0
3 years ago
A sample of sand, 5cm in diameter and 10 cm long, was prepared at a porosity of 50% in a constant head apparatus. The total head
GarryVolchara [31]

Answer:

K = 2.037*10^{-3} m/s

V_s = 0.0122 \ m/s

Explanation:

Given that;

diameter (d) = 10cm/2 = 0.1m/2 = 0.05 m

length (l) = 10 cm = 0.1 m

porosity = 50%

height (h) = 30 cm = 0.3 m

time (t) = 5 s

volume (v) = 60 cm³ = 60 × 10⁻⁶ m³

Q (flow rate) = \frac{v}{t}

Q = \frac{60*10^{-6} m^3}{5}

Q = 12*10^{-6} m^3 /sec

From constant head method, we use the relation K = (\frac{Q*L}{A*h}) to determine the hydraulic conductivity ; we have:

K = \frac{12*10^{-6}*0.1}{\frac{\pi}{4}0.05^2*0.3}

K = 0.002037\\\\K = 2.037*10^{-3} m/s

Seepage velocity V_s = \frac{velocity }{porosity}

where; velocity = K*i

=(2.037*10^{-3}*)(\frac{0.3}{0.1})

= 6.111*10^{-3} m/s

V_s = \frac{6.111*10^{-3}}{0.5}

V_s = 0.0122 \ m/s

8 0
4 years ago
Is sidewalk cement an element or a compound?
hram777 [196]

Answer:

Cement is a compound mixdure, so cannot be an element.

Explanation:

6 0
3 years ago
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What two spheres interact together to create fog?
schepotkina [342]
I think it is air and water
5 0
3 years ago
How many electrons does nitrogen have in its outer energy level?
ch4aika [34]
5 electrons<span>The number of valence electrons is the number of electrons in the outer shell, that the atom uses for bonding. Nitrogen has 5 electrons in its n=2 (outer) shell. </span>
5 0
4 years ago
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