Answer:
Have you ever noticed that the night sky in winter looks different than the summer? We see constellations at different times of the year - spring, summer, fall, & winter. This occurs because the Earth is orbiting the Sun. ... In summer, we see the opposite (we see Scorpius at night and Orion is in the sky during the day).
Calculation: Molar mass of water = 180 % of water = > 180/286*100 = > 62.93%.
Answer: the percent by mass of water in the hydrate Na2CO3.10H20 is 62.93%.
Answer:
6.0 moles of H₂S are produced.
Explanation:
Let's consider the following balanced equation.
2 CH₄ + S₈ → 2 CS₂ + 4 H₂S
The molar ratio of S₈ to H₂S is 1 mol S₈: 4 mol H₂S. The moles of H₂S produced when 1.5 mol of S₈ react are:
1.5 mol S₈ × (4 mol H₂S/ 1 mol S₈) = 6.0 mol H₂S
6.0 moles of H₂S are produced, when 1.5 mol of S₈ react.
Answer:
The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. If we account for all reactants and products in a chemical reaction, the total mass will be the same at any point in time in any closed system. Lavoisier's finding laid the foundation for modern chemistry and revolutionized science.
Explanation: