Answer : The molar mass of hemoglobin is, 
Explanation : Given,
Molar mass of iron = 55.85 g/mol
0.349 % Fe by mass that means 0.349 grams of Fe present in 100 grams of hemoglobin.
or,
Now put all the given values in this formula, we get:
Thus, the molar mass of hemoglobin is,
Clean Water Act
Explanation:
The Clean Water Act in 1972 was a set of laws signed by former President Nixon that helps to keep water clean in the United States.
- The act sets a safe limit for the amount and kind of pollutants that can be released into the water that won't contaminate it.
- The acts charged the Environmental Protection Agency(EPA) to set a safe limit for nature and amount of pollutants that can be released into the water.
- This act is one of the several environmental polices in the United States that ensures a safe drinking water is available.
learn more:
Pollution brainly.com/question/10743354
#learnwithBrainly
True....... hope this helps
Answer:
2 double bonds 2 single bonds
Rock is a combination of two or more minerals, and it does not possess any specific chemical composition. It is present naturally in the environment. Some examples of rocks are limestone, granite, etc.,Limestone may contain minerals like calcite and aragonite. Each mineral has a specific chemical composition with a well defined crystalline structure.
Therefore, the correct option would be a. rock as rock is the naturally occurring solid mass made up of different types of minerals.
