Answer:
1 Mg 1000 kg megagrams to kilograms table
1 dag 10 g dekagrams to grams table
1 kg 100 dag kilograms to dekagrams table
1 g 100 cg grams to centigrams table
1 hg 10000 cg hectograms to centigrams table
1 mg 0.1 cg milligrams to centigrams table
1 hg 100 g hectograms to grams table
1 hg 0.1 kg hectograms to kilograms table
1 ng 1.0E-9 g nanograms to grams table
1 dag 10000 mg
Explanation:
Answer:
4.02g of Na2CO3⸱2H2O must be added completing the volume of the solution to 100mL
Explanation:
A 3%(w/v) solution contains 3g of solute (In this case, Na2CO3) in 100mL of solution.
Assuming we require 100mL of solution we must add 3g of Na2CO3. The reactant that is available is its dihydrate, with molar mass:
106g/mol + 2*MW H2O
106g/mol + 2*18g/mol = 142g/mol
That means the mass of Na2CO3.2H2O that must be added to prepare the solution is:
3g Na2CO3 * (142g/mol Na2CO3.2H2O / 106g/mol Na2CO3) =
<h3>4.02g of Na2CO3⸱2H2O must be added completing the volume of the solution to 100mL</h3>
Answer:
458ml
Explanation:
According to charles law,
Given values,
Volume occupied
Temperature
Second temperature
Volume
From charles law,
Volume occupied by the oxygen at 0.0°C is 458ml
<span>C is the correct answer. Mechanical weathering is the breakdown of an object into smaller parts, but its chemical composition does not change. In contrast, chemical weathering breaks objects into particles with different compositions to the original.</span>
Answer:
76
Explanation:
Alpha decay is one of the most basic forms of radioactive decay. It has an atomic mass of 4 and a proton number of two.
Undergoing an alpha decay will decrease the atomic mass by four and the atomic number by two.
In this particular question, we are particular about the atomic number. The atom has an atomic number of 78. So taking 2 off this gives 76