Answer:
4g of the radioactive element present
Explanation:
Radioactive elements are atoms that are unstable in normal conditions and are converted in another different atoms.
1 half life express the time that is need to decay the half of the initial amount of the radioactive element.
If initially we have 8g of the radioactive element, after 1 life we will have 8g/2 =
4g of the radioactive element present
Answer:
i dont know they made me do it! sorry!!!
Explanation:
Answer:
The balanced chemical reaction is expressed as:
HCl + NaOH ---> NaCl + H2O
We are given the amount and the concentration of the sodium hydroxide reactant. This will be the starting point for the calculations.
0.100 mol NaOH/L solution (0.06 L solution) ( 1 mol HCl / 1 mol NaOH) = 0.006 mol HCl
Molarity = amount in moles / Volume of solution = 0.006 mol HCl/ 0.150 L
Molarity = 0.04 M
Explanation:
Answer:
Answer is given below:
Explanation:
The way it is made (3) Structure.
The basic unit of life (7) Cell.
Perform the different functions of cell (7) Organelles.
No nucleus and unicellular (1) Prokaryote.
Composed of many cells (6) Tissue.
Concluded that all animals are made of cells (10) Theodore schwann .
Contains the genetic information (2) Nucleus.
Concluded that all plants are made up of cells (9) Matthias Schleilden.
Concluded that all cell came from pre existing cells (10)
Rudolf Virchow.
Has a nucleus and some are unicellular, but mostly
multicellular (4)
Eukaryote
Answer:
The law of conservation of mass
Explanation:
A chemical equation is an expression of the net composition change associated with a chemical reaction. It shows how a certain amount of reactants yields a certain amount of products. Both of these amounts are measured in moles. Chemical equations often contain information about the state of the reactants: solid, liquid, gas, or aqueous. In addition, they always adhere to the law of conservation of mass, which holds that matter can change form, but cannot be created or destroyed.
