Answer: "The moon is a major influence on the Earth’s tides, but the sun also generates considerable tidal forces. Solar tides are about half as large as lunar tides and are expressed as a variation of lunar tidal patterns, not as a separate set of tides. When the sun, moon, and Earth are in alignment (at the time of the new or full moon), the solar tide has an additive effect on the lunar tide, creating extra-high high tides, and very low, low tides—both commonly called spring tides. One week later, when the sun and moon are at right angles to each other, the solar tide partially cancels out the lunar tide and produces moderate tides known as neap tides. During each lunar month, two sets of spring tides and two sets of neap tides occur"
Explanation:
A phase change is an example of a physical change.
Answer:
colorless, odorless gas produced by burning carbon and organic compounds and by respiration
Explanation:
1) Chemical equation:
2Ca + O2 ---> 2CaO
2) molar ratios
2 mol Ca : 1 mol O2 : 2 mol CaO
3) Convert 35.4 g of Ca to moles:
number of moles = mass in grams / atomic mass = 35.4 g / 40.078 g/mol = 0.883 mol
3) use proportion and solve for x:
2 mol Ca / 1 mol O2 = 0.883 mol Ca / x
=> x = 0.883 mol Ca * 1 mol O2 / 2 mol Ca
=> x = 0.4416 mol O2
3) use ideal gases equation to transform moles to liters
pV = nRT => V = nRT / p =
V = [0.4416 mol * 0.0821 atm*liter / atm*K * 285K] / 1.2 atm = 8.6 liter
Answer: 8.6 liters
Answer:
Blank 1 - 2
Blank 2 - 4
Blank 3 - 3
Explanation:
The unbalanced chemical equation given in the question is as follows:
Au2O3 → Au + O2
To balance a chemical equation, the number of atoms of each element on both sides of the equation (reactants and product) must be the same. Based on this explanation, the balanced chemical equation is as follows:
2Au2O3 → 4Au + 3O2
- 4 atoms of gold (Au) on both sides
- 6 atoms of oxygen on both sides
Hence, based on the question, blank 1, 2 and 3 are 2, 4 and 3 respectively.