4 below are several substances present in cereal. look at the diagram of each and decide if it is an element, compound, or mixture.
| substance | diagram | e, c or m? | what made you classify it this way? |
|--|--|--|--|--|
| water | | | |
| sugar (glucose) | | | |
| salt | | | |
| vitamin d c₂₇h₄₄o₃ | | | |
| copper (trace amounts) | | | |
| milk (added to eat) | | | |
| manganese (trace amounts) | | | |
| tripotassium phosphate k₃po₄ | | | |
| calcium carbonate caco₃ | | | |
| stainless steel spoon | | | |

Question

Accepted Answer

# Explanation:
## Step1: Recall definitions
An element consists of only one - type of atom, a compound consists of two or more different types of atoms chemically combined, and a mixture contains two or more substances that are not chemically combined.
## Step2: Analyze water ($H_2O$)
It has hydrogen and oxygen atoms chemically bonded, so it is a compound (C). Reason: Different atoms ($H$ and $O$) are chemically combined.
## Step3: Analyze sugar (glucose)
It has carbon, hydrogen, and oxygen atoms chemically bonded, so it is a compound (C). Reason: Multiple types of atoms ($C$, $H$, $O$) are chemically combined.
## Step4: Analyze salt ($NaCl$)
It has sodium and chlorine atoms chemically bonded, so it is a compound (C). Reason: Different atoms ($Na$ and $Cl$) are chemically combined.
## Step5: Analyze vitamin D ($C_{27}H_{44}O_3$)
It has carbon, hydrogen, and oxygen atoms chemically bonded, so it is a compound (C). Reason: Multiple types of atoms ($C$, $H$, $O$) are chemically combined.
## Step6: Analyze copper
It consists of only copper atoms, so it is an element (E). Reason: Only one - type of atom ($Cu$).
## Step7: Analyze milk
It contains fat, whey, lactose, etc., which are not chemically combined, so it is a mixture (M). Reason: Multiple substances are physically mixed.
## Step8: Analyze manganese
It consists of only manganese atoms, so it is an element (E). Reason: Only one - type of atom ($Mn$).
## Step9: Analyze tripotassium phosphate ($K_3PO_4$)
It has potassium, phosphorus, and oxygen atoms chemically bonded, so it is a compound (C). Reason: Different atoms ($K$, $P$, $O$) are chemically combined.
## Step10: Analyze calcium carbonate ($CaCO_3$)
It has calcium, carbon, and oxygen atoms chemically bonded, so it is a compound (C). Reason: Different atoms ($Ca$, $C$, $O$) are chemically combined.
## Step11: Analyze stainless - steel spoon
It is a mixture of iron, chromium, nickel, etc., so it is a mixture (M). Reason: Multiple metals are physically mixed.

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Question

Explanation:

Step1: Recall definitions

Step2: Analyze water ($H_2O$)

Step3: Analyze sugar (glucose)

Step4: Analyze salt ($NaCl$)

Step5: Analyze vitamin D ($C_{27}H_{44}O_3$)

Step6: Analyze copper

Step7: Analyze milk

Step8: Analyze manganese

Step9: Analyze tripotassium phosphate ($K_3PO_4$)

Step10: Analyze calcium carbonate ($CaCO_3$)

Step11: Analyze stainless - steel spoon

Answer:

substance	diagram	e, c or m?	what made you classify it this way?
sugar (glucose)
salt
vitamin d c₂₇h₄₄o₃
copper (trace amounts)
milk (added to eat)
manganese (trace amounts)
tripotassium phosphate k₃po₄
calcium carbonate caco₃
stainless steel spoon

Substance	E, C or M?	What made you classify it this way?
Sugar (Glucose)	C	Multiple types of atoms ($C$, $H$, $O$) are chemically combined
Salt	C	Different atoms ($Na$ and $Cl$) are chemically combined
Vitamin D	C	Multiple types of atoms ($C$, $H$, $O$) are chemically combined
Copper	E	Only one - type of atom ($Cu$)
Milk	M	Multiple substances are physically mixed
Manganese	E	Only one - type of atom ($Mn$)
Tripotassium phosphate	C	Different atoms ($K$, $P$, $O$) are chemically combined
Calcium carbonate	C	Different atoms ($Ca$, $C$, $O$) are chemically combined
Stainless - steel spoon	M	Multiple metals are physically mixed