Which observation illustrates the law of conservation of mass?a. Burning 10 g of propane produces twice as much carbon dioxide as burning 5 g of propane.
b. The C:O mass ratio of one compound is exactly double that of another compound.
c. When 3 g of carbon reacts with 8 g of oxygen, 11 g of carbon dioxide is produced.
d. The C:O mass ratio of a particular compound is the same, regardless of the size or source of the sample.

Answer:

6 mols HCl

Explanation:

(I'm an AP chemistry student but not perfect at this stuff)

you can use the Molarity=Moles/L equation here:

(6M)=(moles HCl)/(1L)

divide by 1 on both sides to isolate the moles of HCl

this gets you 6 moles HCl.

Again I'm just a student so my answer might be wrong, but this question should just require the M=mols/L equation :).

The most stable because they can contain the most valence electrons in their outer shell. The correct option is B.

Thus, The group of elements on the periodic table known as noble gases, commonly referred to as inert gases, is thought to be the most stable.

They are radon (Rn), krypton (Kr), xenon (Xe), neon (Ne), helium (He), and argon (Ar). Noble gases are extremely stable and less likely to combine chemically with other elements because they contain entire valence electron shells.

Their full electron configurations, which result in low reactivity, are the cause of this stability.

Thus, The most stable because they can contain the most valence electrons in their outer shell. The correct option is B.

Learn more about Valence electrons, refer to the link:

brainly.com/question/31264554

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The three phenomena occur during a double-slit experiment and support the wave model of light is bright areas appear on the screen, light bends around the edges of the slit, dark areas appear on the screen. Therefore, option B, C and D are correct.

What is double slit experiment ?

The double-slit experiment, which was conducted to study the characteristics of light in the eighteenth century, has subsequently been found to illustrate the duality of photons as well as the ideas of superposition and quantum interference.

It implies that things we refer to as "particles," like electrons, in some ways mix the traits of both particles and waves. That is quantum physics' renowned wave-particle duality.

The three phenomena occur during a double-slit experiment and support the wave model of light is bright areas appear on the screen, light bends around the edges of the slit, dark areas appear on the screen.

Thus, option B, C and D are correct.

To learn more about the double slit experiment, follow the link;

brainly.com/question/28188781

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Answer:BC And D

Explanation:just did the quiz