The mass percent of a solution is calculated by dividing the mass of the solute by the total mass of the solution and multiplying by 100%. In this case, the solute is Na₂CO₃ and the solvent is H₂O. The calculation yields a mass percent of 6% for Na₂CO₃ in the solution.
To calculate the mass percent of a solution, we need the mass of the solute and the mass of the solution (which is the sum of the masses of the solute and the solvent). In your given solution, you have 15 g of Na₂CO₃ (solute) and 235 g of H₂O (solvent). Therefore, the total mass of the solution is 15 g (Na₂CO₃) + 235 g (H₂O) = 250 g.
Now, to find the mass percent of Na₂CO₃ in the solution, we use the following formula:
Mass percent = (mass of solute / total mass of solution) × 100%
Substitute the known values into the formula, we get:
Mass percent = (15 g / 250 g) × 100% = 6%
So, the mass percentage of Na₂CO₃ in the H₂O solution is 6%.
Learn more about mass percent here:
#SPJ11
Answer:
The formula for molality is m = moles of solute / kilograms of solvent. In problem solving involving molality, we sometimes need to use additional formulas to get to the final answer. One formula we need to be aware of is the formula for density, which is d = m / v, where d is density, m is mass and v is volume
Explanation:
it is a measure of the concentration of a solute in a solution in terms of amount of substance in a specified amount of mass of the solvent. This contrasts with the definition of molarity which is based on a specified volume of solution.
b. conduction
c. cold air rising and warm air sinking
d. radiation
Answer:
cold air rising and warm air sinking
Explanation:
Convection is well known in nature. During convection, warm particles rise above the surface while cooler particles sink below. Hence a convection current is set up.
Air moves by convection. Hot air rises and moves toward and is then replaced with cooler air. A typical application of convection in nature is land and sea breeze.
Answer: B. Metallic (happy to help)
Explanation:
The number of atoms in the 6 grams of carbon is equal to 1.506 × 10²³.
The Avogadro number is the proportionality factor which is the number of particles such as atoms, molecules, or ions in one mole of a substance.
Avogadro's number possesses a numeric value of 6.022 × 10²³ reciprocal moles. Avogadro's constant is named by Stanislao Cannizzaro after the scientist Amedeo Avogadro.
Given, the mass of the carbon in sample = 6 g
The number of atoms of one mole of carbon = 6.022 × 10²³
The atomic mass of one mole of carbon = 12 g
It means 12 g of the carbon has atoms = 6.022 × 10²³ carbon atoms
Then 6 grams of carbon will have atoms = (6/12) × 6.022 × 10²³
= 3.011 × 10²³ carbon atoms
Therefore, the atoms of carbon in 6 g of sample of carbon are 3.011 × 10²³ atoms.
Learn more about Avogadro's number, here:
#SPJ2
Answer:
Yes; new substances formed, as evidenced by the color changes and bubbles. Some signs of a chemical change are a change in color and the formation of bubbles. The five conditions of chemical change: color chage, formation of a precipitate, formation of a gas, odor change, temperature change
Answer:
OBSERVING AND QUESTIONING
Explanation:
when you use the scienfic method the first thing you have to do is question you theory and coming up with a hypothesis which is what you expect to happen
Answer:
make an observation
Explanation: