Answer:
demRafi is working odd jobs to save enough money to buy a new phone. Last month, he earned $125 raking leaves for his neighbors. This month, there was a big snowstorm. Rafi earned $235 shoveling snow!
How much money did Rafi earn altogether?Rafi is working odd jobs to save enough money to buy a new phone. Last month, he earned $125 raking leaves for his neighbors. This month, there was a big snowstorm. Rafi earned $235 shoveling snow!
How much money did Rafi earn altogether?Rafi is working odd jobs to save enough money to buy a new phone. Last month, he earned $125 raking leaves for his neighbors. This month, there was a big snowstorm. Rafi earned $235 shoveling snow!
How much money did Rafi earn altogether?
Explanation:lm
Biodiversity is the diversity of species in an area, which makes an ecosystem
Answer:
The atomic mass of this element is 121.8 amu.
The average atomic mass calculated is of an element named antimony that is Sb.
Explanation:
Average atomic mass of an element is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.
Formula used to calculate average atomic mass follows:
.....(1)
We are given:
Mass of isotope 1 = 120.9038 amu
Percentage abundance of isotope 1 = 57.4%
Fractional abundance of isotope 1 = 0.574
Mass of isotope 2 = 122.9042 amu
Percentage abundance of isotope 2 = 42.6%.
Fractional abundance of isotope 2 = 0.426
Putting values in equation 1, we get:
![\text{Average atomic mass of Z}=\sum[(120.9038 amu\times 0.574)+( 122.9042 amu\times 0.426)]](https://tex.z-dn.net/?f=%5Ctext%7BAverage%20atomic%20mass%20of%20Z%7D%3D%5Csum%5B%28120.9038%20amu%5Ctimes%200.574%29%2B%28%20122.9042%20amu%5Ctimes%200.426%29%5D)
The atomic mass of this element is 121.8 amu.
The average atomic mass calculated is of an element named antimony that is Sb.
The Standard Temperature and Pressure is 1 atm, 273 K
<u>Explanation:</u>
STP is Standard Temperature and Pressure
- Standard temperature is characterized as zero degrees Celsius (0°C), or 273.15 degrees Kelvin (273.15 K). This is the point of solidification of water at sea level, in the air at standard pressure.
Standard Temperature is
0° C in Celsius or 273 K in Kelvin
- Standard Pressure is 1 Atm, 101.3kPa or 760 mmHg or torr. STP is the "standard" condition regularly utilized for estimating gas density and volume.
Standard Pressure is
1 Atmosphere (atm)
760 Torricelli's (torr)
760 Millimeters of Mercury (mmHg)
101.325 KiloPascals (kPa)
