Fixing typo in ch05: menmonic => mnemonic

ch05.asciidoc

@@ -151,7 +151,7 @@ Let's now examine each of the important industry standards that are used by many
 
 [TIP]
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-Mnemonic words are often confused with "brainwallets". They are not the same. The primary difference is that a brainwallet consists of words chosen by the user, whereas menmonic words are created randomly by the wallet and presented to the user. This important difference makes mnemonic words much more secure, because humans are very poor sources of randomness.
+Mnemonic words are often confused with "brainwallets". They are not the same. The primary difference is that a brainwallet consists of words chosen by the user, whereas mnemonic words are created randomly by the wallet and presented to the user. This important difference makes mnemonic words much more secure, because humans are very poor sources of randomness.
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 Mnemonic codes are defined in((("BIP-39"))) Bitcoin Improvement Proposal 39 (see <<bip-39>>). Note that BIP-39 is one implementation of a mnemonic code standard. Specifically, there is a different standard, with a different set of words, used by the((("Electrum wallet")))((("mnemonic code words","Electrum wallet and"))) Electrum wallet and predating BIP-39. BIP-39 was proposed by the((("mnemonic code words","Trezor wallet and")))((("Trezor wallet"))) company behind the Trezor hardware wallet and is incompatible with Electrum's implementation. However, BIP-39 has now achieved broad industry support across dozens of interoperable implementations and should be considered the de-facto industry standard.
@@ -199,7 +199,7 @@ The process described in steps 7 through 9 below continues from the process desc
 [start=7]
 7. The first parameter to the PBKDF2 key-stretching function is the _mnemonic_ produced from step 6 in <<generating_mnemonic_words>>.
 8. The second parameter to the PBKDF2 key-stretching function is a _salt_. The salt is composed of the string constant "+mnemonic+" concatenated with an optional user-supplied passphrase string.
-9. PBKDF2 stretches the menmonic and salt parameters using 2048 rounds of hashing with the HMAC-SHA512 algorithm, producing a 512-bit value as its final output. That 512-bit value is the seed.
+9. PBKDF2 stretches the mnemonic and salt parameters using 2048 rounds of hashing with the HMAC-SHA512 algorithm, producing a 512-bit value as its final output. That 512-bit value is the seed.
 
 .From mnemonic to seed
 image::images/Mnemonic_to_seed.png["From mnemonic to seed"]