Which statement best describes the two substances?
Particles collide in liquids so Substance Y is a liquid.
Particles collide in gas so Substance X is a gas.
Particles move around in liquids so Substance X is a liquid.
Particles move around in gas so Substance Y is a gas.
Answer: Option (b) is the correct answer.
Explanation:
In liquids, the molecules are held by strong intermolecular forces of attraction as compared to gases. Due to which they are able to collide and slide past each other. Hence, they have a medium kinetic energy.
And, in liquid molecules there is moderate intermolecular distance between the particles.
In gases, the molecules are held by weak Vander waal forces. Hence, they have high kinetic energy due to which they move very rapidly from one place to another leading to more number of collisions.
Hence, gases are able to expand more rapidly as compared to liquids. Therefore, between the atoms of a gas there are large intermolecular distances.
Therefore, we can conclude that the statement particles collide in gas so Substance X is a gas, best describes the two substances.
your answer is Particles collide in gas so Substance X is a gas.
Answer:
Transcription
Explanation:
Genetic diversity, as reflected in a diverse gene pool, is crucial for a species' survival and adaptation. It helps create a range of physical and chemical traits, enhancing the ability of a species to survive in changing environments. This also has potential benefits for humans, such as in the development of medications.
Having a diverse gene pool is crucial for the survival and adaptation of a species. Genetic diversity refers to the diversity of alleles and genotypes within a population, with greater diversity offering a higher potential for adaptation. This is because genetic diversity results in a wider range of physical and chemical traits, which increases the chances of some individuals in a species being able to survive in changing environmental conditions.
For example, species undergoing sexual reproduction create offspring with diverse phenotypes, providing an advantage in unstable or changing environments. This diversity is often increased intentionally in species breeding programs in zoos and nature reserves to maintain phenotypic diversity and minimize the risks of inbreeding, which can lead to harmful genetic mutations. Conversely, methods such as self-pollination lead to less genetic diversity as genetic material from the same plant forms the zygote.
Furthermore, greater genetic diversity often translates into chemical diversity, as genes code for proteins and influence metabolic processes. Different species produce various chemicals in their cells, which not only help ensure their survival and reproduction, but also carry potential benefits for humans, such as the development of medications from these cellular products and byproducts.
#SPJ3
what is the reacted volume of oxygen gas at STP and the mass of the produced water vapour in this reaction ?
Answer:
Volume of O₂ = 56 dm³
mass of water vapors (H₂O) = 90 g
Explanation:
Data Given:
mass of Oxygen = 10 g
Volume of Oxygen = ?
mass of the water vapor = ?
Reaction Given:
2H₂+O₂---->2H₂O
Solution:
First we have to look at the reaction for the information required
2H₂ + O₂ -------> 2H₂O
2 mol 1mol 2 mol
now convert moles to grams
molar mass of H₂ = 2(1) = 2 g/mol
molar mass of O₂ = 2(16) = 32 g/mol
molar mass of H₂0 = 2(1) + 16 = 18 g/mol
So the masses will be
2H₂ + O₂ -------> 2H₂O
2 mol (2 g/mol) 1mol (32 g/mol) 2 mol (18 g/mol)
4 g 32 g 36 g
So now we know that
4 g of hydrogen combine with 32 g of Oxygen and give 36 g of water vapors.
By using above information
First we find the volume of Oxygen:
For this first we find mass and then moles of Oxygen
As we know
if 4 g of hydrogen combine with 32 g of Oxygen then how much oxygen will react with 10 g of hydrogen
Apply unity formula
4 g of hydrogen H₂ ≅ 32 g of Oxygen O₂
10 g of hydrogen H₂ ≅ X g of Oxygen O₂
by doing Cross multiplication
g of Oxygen O₂ = 32 g x 10 g / 4 g
g of Oxygen O₂ = 80 g
So,
mass of oxygen = 80 g
now find moles of oxygen
formula used:
no. of moles = mass in grams/ molar mass . . . . . . (1)
Put values in above equation 1
no. of moles = 80 g / 32 g/mol
no. of moles = 2.5
Now to find volume of oxygen
Formula used
Volume of O₂ = no. of moles x molar volume (22.4 dm³/ mol) . . . . . . (2)
Put values in equation 2
Volume of O₂ = 2.5 moles x 22.4 dm³/mol
Volume of O₂ = 56 dm³
______________________
Now to find mass of water vapors
As we now
if 4 g of hydrogen produce 36 g of water vapors then how much water vapor will produce from 10 g of hydrogen
Apply unity formula
4 g of hydrogen H₂ ≅ 36 g of water vapors (H₂O)
10 g of hydrogen H₂ ≅ X g of water vapors (H₂O)
by doing Cross multiplication
g of water vapors (H₂O) = 36 g x 10 g / 4 g
g of water vapors (H₂O) = 90 g
So,
mass of water vapors (H₂O) = 90 g
An atom consists of a nucleus of protons and neutrons, surrounded by electrons. Each of the elements in the periodic table is classified according to its atomic number, which is the number of protons in that element's nucleus. Protons have a charge of +1, electrons have a charge of -1, and neutrons have no charge. Neutral atoms have the same number of electrons and protons, but they can have a varying number of neutrons. Within a given element, atoms with different numbers of neutrons are isotopes of that element. Isotopes typically exhibit similar chemical behavior to each other.