Answer:
12
Explanation:
To get to this answer you have to look at the number first. So the given number is 12.47 and you need 2 sig figs.
To help you understand this more start off by underlining the first 2 numbers because 2 sig figs are needed. <u>12</u>.47
Now you want to look at the number after the underlined (I bolded that number). <u>12</u>.47
If the number is above 5 then you would round the previous number up by one but in this case it is 4 so you do not increase the number. Hence, you getting 12 as your final answer.
Hope this helped! Let me know if you have any questions.
Explanation:
Complexometric titration (sometimes chelatometry) is a form of volumetric analysis in which the formation of a colored complex is used to indicate the end point of a titration. Complexometric titrations are particularly useful for the determination of a mixture of different metal ions in solution.
hope it will help u ✌️
Answer:
the earth is tilted towards the sun
Explanation:
In the context, there is a sun and earth system and at a certain point when the earth is moving in its orbit around he sun, some point on the earth experiences the summers season. This is because at this point of the earths revolution, the point on the earth is facing the sun and is also tilted towards the sun. So at this point the sun rays fall directly at the surface. While the place which is tilted away from the sun, experiences winter season.
The average atomic mass of Neon would simply be the sum of the weighted average of each isotope. That is:
average atomic mass = 0.905 * 20 + 0.003 * 21 + 0.092 * 22
average atomic mass = 20.187 amu
Answer:
An iron atom located on the heme portion of hemoglobin
Explanation:
Oxygen is attached to an <em>iron</em> atom located on the<em> heme</em> portion of hemoglobin.
Hemogoblin is a protein present in the red blood cells of several vertebrates. The main function of this protein is to transport oxygen through blood. The heme portion consists of an organic cyclic compound that contains 4 nitrogen atoms, which bond to an iron atom.