Answer:
protons only
Explanation:
proton is present in the nucleus of atom as sub atomic particle ..
proton has + charge in the it's top as p+..
1. Homogeneous substance
2. Homogeneous mixture cannot be separated into their respective constituents similar to elements that cannot be separated into simpler substance (not sure)
<span>According to the law of conservation of mass, the masses of the products and reactants must be the same. Adding calcium to the product side is considered a mistake if it is not in the reactant side of a particular chemical equation because it is impossible to produce calcium from thin air (unless this is a nuclear reaction).</span>
Answer:
Option A = pure water
Explanation:
The pure water will have the lowest boiling point as compared to the other given solution.
Reason:
The pure water is just the solvent while other given options are solution which means that solute is present in it. The vapor pressure of the solvent goes to decrease when solute is added. Thus boiling point is increases because more heat is needed in order to create the vapor pressure equal to the external pressure.
The boiling points of solvents thus changes above the solution as the concentration of solute varies. In given solutions the 2.0 m NaCl will have highest boiling point because of high concentration of sodium chloride while 0.5 m NaCl will have lowest boiling point after the pure water.
Mathematical expression:
ΔT = Kbm
ΔT = change in the boiling point
Kb = Boiling point elevation constant
m = molal concentration of solute
The change in the boiling point of solvent above solution will directly proportional to the solute concentration.
The answer to this question would be:
<span>2. The exponents need to be the same so the leading numbers can be added or subtracted.
3. The result has the same number of decimal places as the least precise number.
</span>The exponent is the 10^x that used in scientific notation. .When adding 12.3* 10^5 with 34.56 * 10^4, you need to make the exponent same first. In this case, it would become 12.3* 10^5 + 3.456 * 10^5= 15.756* 10^5
The decimal place could be rounded up to the least precise number. I'm not sure with the significant figures but it seems to use the biggest one.
