Answer:
a) heat it from 23.0 to 78.3
q = (50.0 g) (55.3 °C) (2.46 J/g·°C) =
b) boil it at 78.3
(39.3 kJ/mol) (50.0 g / 46.0684 g/mol) =
c) sum up the answers from the two calculations above. Be sure to change the J from the first calc into kJ
Explanation:
2:7 ratio of ethane to O2 = 15:x 9solve for x)
x=52.5 mol O2
Answer:
Dmitri Mendeleev
Explanation:
Dmitri Mendeleev a Russian Chemist arranged elements on the periodic table according to their atomic mass. He used this arrangement to predict some of the properties of the missing element.
- Dmitri Mendeleev around 1869 described the periodic table.
- The table was based on the periodic law which states that "chemical properties of elements are a periodic function of their atomic weights".
- In the Mendeleev table, elements are arranged by atomic weights with recurring properties in a periodic manner.
Answer:
The correct option es interphase
Explanation:
The interface is a stage of the cell division where a lot of energy is demanded, and it is the longest of the entire cycle.
This is because it is here where the duplication of the genetic load is generated, that is, of the chromosomes.
The chromosomes reach the cell poles and this is how a contraction begins to appear in the middle of the cell, it is essential to clarify that the interface not only requires energy but also occupies 95% of the cell division.
Cells have limitations, if the cell is stronger it targets other cells , when a cell is weak it possibly mean it’s disease.
