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3 years ago

The first radioisotope to be put to use medically was iodine-131.

1 answer:

6 0

The first radioisotope to be put to use medically was iodine-131 is True. It was discovered in 1938 by Glenn Seaborg and John Livingood. It is linked to medical diagnosis and treatments, natural gas production and nuclear energy.
<span>The following statement: "Proponents of nuclear energy believe that it is a safer, cleaner, and more efficient way of making electricity than coal-fired power plants" is True. Nuclear energy is energy that is stored in the nucleus of an atom. It is used in the generation of electricity. </span>

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which Substance can be used to Neutralize nitric acid? A Acetic acid C Hydrogen peroxide b milk of magnesia D Ethanol

sweet-ann [11.9K]

Answer:B

Explanation:

7 0

2 years ago

Geologic time is a way to _______.

mylen [45]

Answer: Geologic time is a way to measure the sequence of events on Earth over time

Explanation:

3 0

3 years ago

When 2.69 g 2.69 g of a nonelectrolyte solute is dissolved in water to make 345 mL 345 mL of solution at 26 °C, 26 °C, the solut

Gre4nikov [31]

Answer:

The molar concentration of this solution is 0.0463 mol/L

Explanation:

Step 1 : Data given

Mass of a nonelectrolyte solute = 2.69 grams

Volume of water = 345 mL = 0.345 L

Temperature = 26.0°CC = 273 + 26 = 299 K

The osmotic pressure = 863 torr

⇒ 863torr /760 = 1.13553 atm

Step 2: Calculate the molar concentration of this solution

Π = i*M*R*T

⇒with Π = the osmotic pressure = 1.13553 atm

⇒with i = the van't Hoff factor of the nonelectrolyte solute = 1

⇒with M = the molar concentration = TO BE DETERMINED

⇒with R = the gas constant = 0.08206 L*atm/mol*K

⇒with T = the temperature = 299 K

1.13553 atm = 1 * M * 0.08206 L*atm/mol*K * 299 K

M = 1.13553 / (0.08206*299)

M = 0.0463 mol/L

The molar concentration of this solution is 0.0463 mol/L

5 0

3 years ago

Determine the molarity of a solution with a volume of 435. mL and 0.550 mol of solute dissolved.

lora16 [44]

Answer:

M = 1.26

Explanation:

Molarity = mole of solution/liters of solution
435mL/1000 = .435L
Plugging in the numbers into the formula, we get:
Molarity = .550 mol/.435L = 1.26 M

8 0

2 years ago

If water was used to rinse the burette used to dispense the hydrochloric acid solution, how would this affect

Rufina [12.5K]

Answer:

The concentration of hydrochloric acid would be estimated to be less.

Explanation:

This is because, the hydroxyl ions from water react with the hydrogen ions from the hydrochloric acid, hence decreasing the moles of hydrogen ions which lowers the acidic strength of Hydrochloric acid.

7 0

3 years ago