Answer:
A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Physical properties include color, density, hardness, and melting and boiling points. A chemical property describes the ability of a substance to undergo a specific chemical change.
I hope this helps you understand! <3
1 mol of gas at STP occupy 22,4dm³ (22,4L)
8,482g ------- 2,5L
Xg ------------- 22,4 L
X = 75,999 ≈ 76 g/mol
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Answer:
Only some of the molecules of a weak base dissociate to produce hydroxide ions when mixed with water, but all of the molecules of a strong base dissociate to produce hydroxide ions.
Explanation:
- Generally, acids (weak or strong) dissociate to produce hydrogen ions, while bases (weak or strong) dissociate to produce hydroxide ions.
- Strong bases dissociate completely to produce hydroxide ions.
- But, weak bases do not dissociate completely to produce hydroxide ions, they dissociate by a percent depending on the strength of the base.
Only some of the molecules of a weak base dissociate to produce hydroxide ions when mixed with water, but all of the molecules of a strong base dissociate to produce hydroxide ions.
<span>2 H</span>₂<span> + O</span>₂<span> = 2 H</span>₂<span>O
4 g H</span>₂ ------------ 32 g O₂----------- 36 g H₂O
<span> 8 g H</span>₂ ------------ 64 g O₂------------ ? g H₂O
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Mass of H</span>₂O :
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64 * 36 / 32 =
2304 / 32 = 72 g of H</span>₂O
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hope this helps!
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A straight-chain alkane differs from a cycloalkane in such a way that the straight-chain has more hydrogen than the cycloalkane. In this case, straight-chain has two more Hydrogen atoms than the cyclic alkane. Basically, they differ in the number of hydrogen atoms attached to the carbon. Straight-chain Alkane has a formula CnH2n+2 while cyclic alkane follows CnH2n.