Answer:
The Moon has an atmosphere.
Explanation:
The Moon has an atmosphere, but it is very tenuous. Gases in the lunar atmosphere are easily lost to space. Because of the Moon's low gravity, light atoms such as helium receive enough energy from solar heating so that they escape in just a few hours.
N=1.2·10²⁴
Nₐ=6.0221·10²³ mol⁻¹
n₂(H₂O)=4 mol
n₁(H₂O)=N/Nₐ
n=n₁+n₂=N/Nₐ+n₂
n=1.2·10²⁴/6.0221·10²³ + 4 = 5.99 mol
5.99 <span>moles of water are in the glass</span>
The catalyst has been represented with the formula above the arrow in the chemical equation.
The catalyst has been the compound or element in the chemical reaction that helps in the lowering of the activation energy of the system and thereby leads to an increase in the rate of the reaction.
The chemical equation has been represented in the form of the chemical formula of the reactants and the products.
The catalyst has not been consumed in the chemical reaction, thus it has been represented with the formula above the arrow in the chemical equation.
For more information about the catalyst, refer to the link:
brainly.com/question/17052831
Answer:
Radioactive isotopes are widely used in medical field
Explanation:
Radioactive isotopes are widely used in medical field.
Radiations emitted by radioactive isotopes or used to kill the microorganism in food and to increase the shelf life of food.
Cobalt-60 is used to treat the cancer.
Iodine-131 is used to check the activity of thyroid.
Technetium-99 also used for the thyroid.
Phosphorus-32 is used to detect the cancer specially in skin and eyes.
Xenon-133 is used for lungs imaging.
Au-198 is used to diagnose the liver disease.
Co-60 is used as gamma ray irradiation of tumor.
In industry radioactive isotopes are used to measure the thickness of materials.
