A car motor oil was measured and described using kelvin. Which characteristic of matter was measured

Answers

Answer 1

Answer: Kelvin is a unit for temperature. The temperature of the car motor oil must have been measured and described. At 0 degree Celsius or freezing point of water, there is 273 Kelvin. At the boiling point of water, it reads 373 Kelvin. This is the standard used by scientists in solving in equations. However, Celsius and Fahrenheit are common to daily basis.

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A solution of ammonia and water contains 1.80×1025 water molecules and 7.00×1024 ammonia molecules. How many total hydrogen atoms are in this solution?

Answers

Answer:

6.40x10²⁵ hydrogen atoms

Explanation:

The solution contains:

1.80x10²⁵ water molecules (H₂O)
7.00x10²⁴ ammonia molecules (NH₄)

We need to calculate the total of hydrogen atoms (H) in the solution.

Each water molecule (H₂O) has 2 hydrogen atoms
Each ammonia molecule (NH₄) has 4 hydrogen atoms

Lets now calculate the number of hydrogen atoms in the solution:

total H atoms = (H atoms in water molecules) + (H atoms in ammonia molecules)

total H atoms = (2 x 1.80x10²⁵) + (4 x 7.00x10²⁴) =

total H atoms = 3.60x10²⁵ + 2.80x10²⁵ = 6.40x10²⁵

1 water molecule contains 2H atoms H atoms in 4.20*10^25 water molecules = 8.4*10^25 H atoms 1 NH3 molecule contains 3 H atoms H atoms in 6.00*10^24 NH3 atoms = 3*6.00*10^24 = 1.8*10^16 H atoms.

Total H atoms = 8.4*10^25 + 1.8*10^25 = 1.02*10^16 H atoms

In which chemical reaction will the heat content of the reactants be more than that of the products?

Answers

When the heat content of the reactants be more than that of the products, this reaction is most likely is an endothermic reaction. This type of reaction is characterized by the absorbing heat into the system or the addition of energy into the system for the reaction to occur.

Exothermic. On Plato it will be answer D.

In clinical brachytherapy, the supervision of radio elements and dose interpretation are performed by the therapeutic ____________________ (two words).

Answers

Answer:

Radiation oncologist.

Explanation:

Cancer is one of the most deadly disease and half of the world population died due to cancer every year. Cancer might occur due to the mutation in the genes that control the cell cycle.

The oncologist may be defined as the individual that has specialized in the cancer and its treatment. The different radiation might use to kill the cancerous cell and the radio elements are administered in the drugs used during the chemotherapy.

Thus, the answer is radiation oncologist.

What is a chemical bond?a. a representation of chemical properties
b. a substance that's composed of atoms
c. the force that holds together the elements in a compound
d. the attraction of two atoms that holds the atoms togethe?

Answers

Answer: -

A chemical bond is

C) the force that holds together the elements in a compound.

Explanation: -

A chemical bond results when there is a transfer of electrons from 1 element to another or there is a sharing of electrons between two element atoms.

Due to this compounds are formed.

Hence A chemical bond is

C) the force that holds together the elements in a compound.

the correct answer should be c.

Which statement best describes gamma radiation?(1) It has a mass of 1 and a charge of 1.
(2) It has a mass of 0 and a charge of –1.
(3) It has a mass of 0 and a charge of 0.
(4) It has a mass of 4 and a charge of +2.

Answers

The correct answer is option 3. The gamma radiation has no mass and no charge. This is produced from the release of pure energy from the nucleus. This is simply a stream of high frequency energy.

The hormone thyroxine is secreted by the thyroid gland and has the formula: C15H17NO4I4. How many milligrams of Iodine can be extracted from 15.0 grams of thryoxine?