Physical - the pink can be super light pink, or a darker pigmented pink. it is cut into many different shapes, like beads, spheres, etc.
http://geology.com/gemstones/rose-quartz/
Chemical - a chemical property is it is the chemical formula Silicon Dioxide, SiO<span>2</span>
If you double the concentration of A, the rate is doubled. If you doubled the concentration of B, since the rate law has B^2, the rate is multiplied by 4. If you double both A & B's concentrations, then the rate would be multiplied by 2*4 = 8, which is the last option.
12 moles of water H₂O are produced from the combustion of pentane.
Explanation:
We have the following combustion of pentane (C₅H₁₂):
C₅H₁₂ + 8 O₂ → 5 CO₂ + 6 H₂O
Knowing the chemical reaction we devise the following reasoning:
if 1 moles of pentane C₅H₁₂ produces 6 moles of water H₂O
then 2 moles of pentane C₅H₁₂ produces X moles of water H₂O
X = (2 × 6) / 1 = 12 moles of water H₂O
Learn more about:
combustion of organic compounds
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Answer: D: y - 1 = (3/2) (x + 3)
Explanation:
The very first thing that needs to be done is to calculate the slope of the line shown, as we have to points, we can do it following the equation:
m=(y2 - y1)/(x2 - x1)
We know that the x1,y1 couple is (2,2) and the x2,y2 couple is (-2,-4), then we replace the values on the equation and we have:
m=(-4 - 2)/(-2 - 2) = -6/-4, then we simplify the result and we have 3/2.
We already have the slope of the equation, we are just missing the units that the line is moved to the left. We know that the equation must follow the form y = mx + b, and we already know m, we are missing b on both equations, but, as the line drawn is passing by (0,-1), or the origin, we know that b for that equation is -1. So the equation for that line is:
y = (3/2)x - 1
And the only answer that has the same slope is D.
Answer:
D= there is the same number of each type of atoms on the right side and left side of the equation.
Explanation:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
Law of conservation of mass:
According to the law of conservation mass, mass can neither be created nor destroyed in a chemical equation.
Explanation:
This law was given by french chemist Antoine Lavoisier in 1789. According to this law mass of reactant and mass of product must be equal, because masses are not created or destroyed in a chemical reaction.
For example:
In given photosynthesis reaction:
6CO₂ + 6H₂O + energy → C₆H₁₂O₆ + 6O₂
there are six carbon atoms, eighteen oxygen atoms and twelve hydrogen atoms on the both side of equation so this reaction followed the law of conservation of mass.
