So really you only need to answer the first one because you have more than enough og everything. 2×(what)=14 then that will be your answer
1) The sun is a stat that is located in the middle of the solar system.
2) It gets squeezed together so lightly that four hydrogen nuclei combine to firm form helium atom. This is called nuclear fusion.
3) Solar flares, coronal mass ejection, high-speed solar wind and solar energetic particles.
There are 4 things that are evidence of a chemical change.
1)Change in color
2)Change in shape (gas being let out)
3)Change in temperature
4)Change in smell
Burning wood is a chemical change because it has a change in color, and shape.
The answer is C) 80 grams O2
Answer:
3.018 x 10⁻⁶ M.
Explanation:
- Co(OH)₂ dissociates in solution according to the equation:
<em>Co(OH)₂ →</em> <em>Co²⁺ + 2OH⁻.</em>
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<em>∵ Ksp = [Co²⁺][OH⁻]² = (s)(2s)² = 4s³.</em>
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∴ 4s³ = 1.10 x 10⁻¹⁶.
∴ s³ = 1.10 x 10⁻¹⁶/4 = 2.75 x 10⁻¹⁷.
∴ s = ∛(2.75 x 10⁻¹⁷) = 3.018 x 10⁻⁶ M.
