Answer:
Explanation:
1. Select all the statements about the nucleus of the atom that are correct:
Group of answer choices
B. It contains Protons
D. It has a Positive Charge
E. It contains Neutrons
2. An atom of an element with atomic number 50 and mass number 120 contains:
Group of answer choices
B. 50 protons, 50 electrons, and 70 neutrons
3. Which of these statements is false?
Group of answer choices
D. Electrons have the same mass as a proton but have the opposite charge.
Answer:
The elements or compound that enters into a chemical reaction are reactants or reagents.
Explanation:
A reagent or reactant is, in chemistry, any substance that interacts with another in a chemical reaction that gives rise to other substances of different properties, characteristics and conformation, called reaction products or simply products. Because they are chemical compounds, the reagents can be classified according to many variables: physical-chemical properties, reactivity in chemical reactions, characteristics of the use of the reagent.
Gravity depends on inertia
Answer:
Extensive properties, such as mass and volume, depend on the amount of matter being measured. Intensive properties, such as density and color, do not depend on the amount of the substance present.
According to the chemical equation, the ratio between Ca and HCl for a complete reaction is 1:2. The moles of Ca can be calculated by mass/molar mass, thus 60.0 g/40 g/mole = 1.5 mole. So the moles of HCl in the solution is 1.5mole*2 = 3 mole.
So the volume of HCl solution = Moles of HCl/ concentration of HCl = 3 mole/ 1.25 M = 2.4 L = 2400 mL
