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Gwar [14]
2 years ago
9

Definition of property change.chemistry ​

Chemistry
1 answer:
Black_prince [1.1K]2 years ago
7 0

Answer:

This is the change of one type of matter into another type of matter

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What is the percent of hydrogen by mass in HNO3? (Molar<br> mass of HNO3 = 630 g/mol)
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Answer:

63.01284 g/mol

Explanation:

This compound is also known as Nitric Acid.

Convert grams HNO3 to moles or moles HNO3 to grams

Molecular weight calculation:

1.00794 + 14.0067 + 15.9994*3

Percent composition by element

Element Symbol Atomic Mass # of Atoms Mass Percent

Hydrogen H 1.00794 1 1.600%

Nitrogen N 14.0067 1 22.228%

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3 years ago
I don't understand what the answer choices mean
vodomira [7]

CO  HOPE THIS HELPS ;)

8 0
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4. Which class of matter is the least evenly
lys-0071 [83]

Answer:

Pure iron sulfide is homogeneous (uniform in appearance and properties), shows constant composition (a consistent ratio of iron to sulfur throughout any sample of it, large or small), consists of molecules all of one type, is no longer separable into two separate substances without another chemical reaction, and is .

Explanation:

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8 0
3 years ago
Photo attached, please help me if you can :(
mylen [45]

Answer:

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Explanation:

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2 years ago
A protein has the amino acid sequence
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Answer:

Number of peptide fragments resulting from cleaving with cyanogen bromide? A: Three peptide fragments

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Explanation:

Cyanogen bromide cleaves the methionine C-terminus, then we have a first fragment of 8 amino acids: DSRLSKTM, a second fragment of 15 aas YSIEAPAKLDWEQNM, and a last fragment of only 2 aas is produced, AL

Trypsin cuts the C-terminus of Arginine and Lysine, then we'll have a first fragment of 3 aas DSR, a second fragment consisting of also 3 aas LSK, a third fragment of 10 aas TMYSIEAPAK, and a last fragment of 9 aas LDWEQNMAL.  All produced in three cut sites.

6 0
3 years ago
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