Answer: Option (A) is the correct answer.
Explanation:
An atom consists of three sub atomic particles. These particles are protons, electrons and neutrons.
Protons have a positive charge. Whereas neutrons have no charge. On the other hand, electrons have a negative charge.
Thus, we can conclude that out of the given options, an electron has a negative electrical charge is the correct statement.
Show, or explain, all of your work along with the final answer.
b. larger urban heat islands
c. poor public health
d. a greater support capacity
A lack of sewage structures in overcrowded cities may lead to poor public health. Therefore, the correct option is C.
A sewage system, also known as a wastewater management system, is a system of pipes, pumping stations, and other accessories used to transport sewage from points of origin to points of treatment and disposal.
Combination sewers are systems that transport sewage from both domestic and storm sources. Due of the significant amounts of storm water that must be transported during wet weather conditions, combined sewers usually are made up of big pipes or tunnels. Public health may suffer in densely populated cities with inadequate sewage systems.
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B: H2o
C: HI
D: C3H8
Hydrogen bonds take place between the molecules of H2O.
• Hydrogen bonding takes place only in the molecules where the hydrogen is covalently bonded to nitrogen, oxygen, or fluorine.
• The electronegativity of these three elements is so much that they withdraw most of the electron density in the covalent bond with hydrogen, leaving the atom of hydrogen extremely electron-deficient.
• In the molecule of water, the nucleus of oxygen with +8 charges attracts electrons better than the nucleus of hydrogen with its +1 charge.
• The hydrogen atoms apart from being covalently bonded with the atoms of oxygen are also attracted towards the oxygen atoms nearby. This attraction is the basis of the hydrogen bonds.
Thus, option B, H2O is correct.
To know more about:
Hydrogen bonds can be found between molecules of H2O (water). This is due to the fact that water has a highly electronegative oxygen atom and hydrogen atoms capable of forming a dipole interaction, thereby constituting a hydrogen bond.
Hydrogen bonds can be found between molecules of substance B: H2O, also known as water. Hydrogen bonding occurs when a highly electronegative atom such as Oxygen (O), Nitrogen (N), or Fluorine (F) is involved and there is a hydrogen atom attached to these. In the case of water, there are two hydrogen atoms bonded to a single oxygen atom, which is highly electronegative. These specific features allow for the formation of a relatively strong dipole interaction, called a hydrogen bond, between separate water molecules.
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Answer:
The answer to your question is 2.84 M
Explanation:
Data
mass of MgO = 57.3 g
volume of the solution = 500 ml
Process
1.- Calculate the molar mass of MgO
MgO = 24.3 + 16 = 40.3 g
2.- Calculate the moles of MgO
40.3 g MgO ----------------- 1 mol
57.3 g MgO ----------------- x
x = (57.3 x 1) / 40.3
x = 1.42 moles
3.- Calculate the Molarity
Molarity = moles / volume (l)
Volume = 0.5 liters
-Substitution
Molarity = 1.42 / 0.5
-Result
Molarity = 2.84
The molarity of the solution is 2.84 M.
To find the molarity of the solution, we need to first calculate the number of moles of MgO and the volume of the solution.
First, we convert the mass of MgO to moles using its molar mass. The molar mass of MgO is 40.31 g/mol, so:
moles of MgO = mass of MgO / molar mass of MgO
moles of MgO = 57.3 g / 40.31 g/mol = 1.42 mol
Next, we convert the volume of the solution to liters:
volume of solution = 500.0 mL / 1000 mL/L = 0.500 L
Finally, we divide the number of moles of MgO by the volume of the solution to find the molarity:
molarity = moles of solute / volume of solution
molarity = 1.42 mol / 0.500 L = 2.84 M
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Wine is a homogenous mixture while beef stew is a heterogeneous mixture as it has components which are clearly visible.
Heterogenous mixtures is defined as a type of mixture where in the composition is not uniform throughout the mixture.It consists as two or more phases. The phases are chemically distinct from each other.
As there are two or more phases present in heterogenous mixtures they can be separated by solvent extraction where in one phase is miscible with the solvent and the other phase is immiscible.
Components of a heterogenous mixtures are distinctly visible . There are two types of heterogenous mixtures, the colloids and the suspensions.These two vary with each other with respect to particle size.
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