The weight of a substance is defined as its mass divided by its volume. Please select the best answer from the choices provided T F

Answer:

• 146. g

Explanation:

1) Data:

a) mass of solute = ?

b) volume of solution = 1.25 liter

c) M = 2.92 mol/liter

d) solute NaOH

2) Formulae:

a) Molarity, M = number of moles of solute / volume of solution in liters

b) mass in grams = molar mass × number of moles

3) Solution:

a) Calculate number of moles of solute:

• M = number of moles of solute / volume of solution in liters

        ⇒ number of moles of solute = M × volume of solution in liters

        ⇒ number of moles of solute = 2.92 mol/liter × 1.25 liter = 3.65 mol

b) Molar mass of NaOH = 39.997 g/mol (you can take this number from internet or calculate it using the atomic masses of Na, O, and H).

c) Calculate the mass of solute:

• mass in grams = molar mass × number of moles = 39.997 g/mol × 3.65 mol = 145.98905 g = 146. g

The answer must be reported with 3 significant figures, so it is 146. g.

The correct option is .

Further explanation:

The periodic properties are characteristics that are associated with the different elements found in the periodic table. The origin of different properties is the difference in the atomic structure of the different elements.

For a systematic study of the chemical and physical properties of different elements, they are placed in certain columns called groups and horizontal rows called periods.

The fundamental basis of this arrangement is periodic law that states that chemical elements must be listed in order of their increasing atomic number. When elements are placed in groups in such order it was observed that elements with similar chemical properties repeated after fixed intervals, this was discovered by the Russian scientist Mendeleev. For example, the elements placed in group 1 that included lithium, sodium, potassium, and cesium all reacted vigorously with water. Similarly, the elements in group 17 were termed as halogens as they all readily formed salts with metals of group 1.

The rows of the table called periods and have metals on the left and non-metals on the right. The columns also called groups contains elements with similar chemical properties.

Metals are very good reducing agents that have a high tendency to lose electrons. Their electronegativity is very low. Metals also form cations smaller than an original metal atom. They mostly form an ionic bond.

The properties that identify the metal can be determined by the following:

1. Electronic configuration: A metal generally has 1, 2 or 3valence electrons in its outermost shell.

2. Physical properties: A metal is generally lustrous, hard, malleable, ductile, and solid. It is a good conductor of heat and electricity.

3. Position in the periodic table: Metals are on the bottom left in the periodic table. They are found in group 1 of periodic table.

Therefore, an element is metal is determined by the position of an element in periodic table.

Learn more

1. Which type of bond formed between water brainly.com/question/1059245

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Answer details

Grade: High School

Subject: Chemistry

Chapter: Periodic table

Keywords: electron, metals, nonmetals, group, period, position, electronic configuration, oxygen, hard, lustrous, element.

Final answer:

The distance from Santa Maria to Los Alamos, which is 16.25 miles, would be approximately 2615178.4 centimeters when converted using the conversion factor of 1 mile = 160934.4 cm.

Explanation:

In order to convert the distance from miles to centimeters, you need to use conversion factors. We know that 1 mile is equivalent to approximately 160934.4 centimeters. Therefore, to find the distance from Santa Maria to Los Alamos in centimeters, you would multiply the number of miles by the number of centimeters in a mile.

The calculation would look like this:

16.25 miles * 160934.4 cm/mile = 2615178.4 cm

So, the distance between Santa Maria and Los Alamos is approximately 2615178.4 centimeters.

Learn more about Distance Conversion here:

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Separate Salt and Water Using Distillation

If you want to collect the water, you can use distillation. This works because salt has a much higher boiling point than water. One way to separate salt and water at home is to boil the salt water in a pot with a lid.

hope this helps!!

Final answer:

To separate salt from water, you can use evaporation or filtration.

Explanation:

To separate the salt from the water, you can use the processes of evaporation and filtration.

1. Evaporation: You can heat the saltwater solution to boil off the water and leave behind the salt as solid crystals. The water evaporates and can be collected as a vapor if desired.
2. Filtration: Alternatively, you can use a filter to separate the solid salt particles from the liquid water. The saltwater solution is poured through the filter, which traps the salt while allowing the water to pass through.

Learn more about salt separation here:

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