Given parameters:
Density = 2.7g/cm³
Length of the cube = 10cm
Unknown:
Mass of the cube = ?
Solution:
Density is the mass per unit volume of a substance.
Density = 
Mass = density x volume
We need to find the volume of the cube;
Volume of the cube = L³
where L is the length of the cube;
Volume of the cube = 3³ = 27cm³
So, the mass of the granite = 2.7 x 27 = 72.9g
The granite has a mass of 72.9g
Answer:
Mother board, it is essentially the brain
Explanation:
Answer:
Oxygen is in group 16/VIA, which is called the chalcogens, and members of the same group have similar properties. Sulfur and selenium are the next two elements in the group, and they react with hydrogen gas (H2) in a manner similar to oxygen.
Explanation:
Answer:
–1065.25 KJ of energy.
Explanation:
From the question given above, the following data were obtained:
4FeO + O₂ —> 2Fe₂O₃ ΔH = –560.66 kJ
From the balanced equation above,
The formation of 2 moles of Fe₂O₃ released –560.66 kJ of energy.
Finally, we shall determine the amount of heat energy released when 3.8 moles of Fe₂O₃ are produced. This can be obtained as follow:
From the balanced equation above,
The formation of 2 moles of Fe₂O₃ released –560.66 kJ of energy.
Therefore, the formation of 3.8 moles of Fe₂O₃ will release
= (3.8 × –560.66)/2 = –1065.25 KJ of energy.
Thus, –1065.25 KJ of energy is released from the reaction.
The circumference of the world is 24901 miles. This equals 1577727360 inches, which when divided by 0.75 of an inch, equals 6.02 times 10 to the 23rd power. Hope this helps.
