Select the ion.
1)Cu
2)PO4-3
3)SO2
Answers
Answer:
Explanation: the answer is B. PO4-3
Related Questions
A mixture that appears to contain only one substance is a ?
What is the mass of an unknown whose volume is 0.45L and whose density is 94kg/L
chlorine has 7 outer energy level electrons and argon has 8. what is the difference in the reactivity of these two elements?
Solutions of mercury (I) nitrate and potassium bromide are mixed
Answers
Final answer:
Periodic trends are patterns in the periodic table that help predict certain properties of elements. They include atomic radius, ionization energy, and metallic character, which change based on the element's position in the table.
Explanation:
Periodic trends refer to specific patterns presented in the periodic table that reflect different aspects of a certain element, including its size and electronic properties. They are instrumental to chemists as they provide a tool for quickly predicting an element's properties. These trends occur because of the similar atomic structure of the elements within their respective group families or periods, and due to the periodic nature of the elements.
Majorperiodic trendsconsist of atomic radius, ionization energy, and metallic character. As an example, ionization energy and electronegativity typically intensify from left to right in a row and from the base to the top in a column. In contrast, the atomic size and the metallic character increase from right to left in a row and from the top to the bottom in a column. The periodic table's structure allows us to qualitatively evaluate how these properties of the elements change based on their position on the table.
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Answers
Final answer:
A charged group of covalently bonded atoms is known as a polyatomic ion or molecular ion; this is a group of atoms sharing electrons through covalent bonds and carrying an overall charge.
Explanation:
A charged group of covalently bonded atoms is known as a polyatomic ion or a molecular ion. These ions are formed when a group of atoms such as ammonium (NH4+), nitrate (NO3-), or sulfate (SO42-) share electrons through covalent bonds and also carry an overall charge. This net charge results from an excess or a deficiency of electrons compared to the total number of protons in the ion's atoms.
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56 Explain why the total thermal energy of a sample containing 22.2 grams of NaNO3 dissolved in 200. grams of water at 20.°C is greater than the total thermal energy of a sample containing 11.1 grams of NaNO3 dissolved in 100. grams of water at 20.°C. [1]
57 Compare the boiling point of a NaNO3 solution at standard pressure to the boiling point of water at standard pressure. [1]
Answers
56) Answer==> 22.2g produces more heat than 11.1g when dissolved
57) Answer==> the solution has a higher boiling point
Answers
Answer:
2.7*10^23
Explanation:
first work out the moles
So do 36g / 80 (80 is bromine's relative Atomic Mass number)
You have 0.45 M
Then, do 0.45 * 6.02*10^23
You get 2.7*10^23, which is your answer
Answers
The Lewis and Langmuir theory of electrovalency (and as well as Kossel's) is dealing with Ionic bonds.
Lewis: electron-pair sharing, octet rule, Lewis Symbols or StructureLangmuir: introduced term "covalent" bond, and popularized Lewis's ideas
The Lewis-Langmuir electron-pair or covalent bond is referred as the homopolar bond, where the complete transfer of electrons give rise to ionic, or electrovalent bond (1) through attraction of opposite charges.
Answers
Considering the definition of molar mass and molarity, the volume of each compound is:
- NaCl= 0.1355 L
- C₂H₆O = 0.0622 L
- CH₃COOH = 0.047 L
Definition of molar mass
The molar mass of substance is a property defined as its mass per unit quantity of substance, in other words, molar mass is the amount of mass that a substance contains in one mole.
Definition of molarity
Molar concentration or molarity is a measure of the concentration of a solute in a solution and indicates the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of solute by the volume of the solution:
Molarity is expressed in units.
Volume required
You know that the molar mass of each compound is:
- NaCl = 58.44 g/mol
- C₂H₆O = 46.06 g/mol
- CH₃COOH = 60.0 g/mol
On the other side, you know that the mass of each compound is:
- NaCl = 2.14 g
- C₂H₆O = 4.30 g
- CH₃COOH = 0.85 g
Then, considering the definition of molar mass, the amount of moles of each compound is:
- NaCl =
= 0.0366 moles
- C₂H₆O =
= 0.0933 moles
- CH₃COOH =
= 0.0141 moles
The molarity of each compound is:
- NaCl = 0.27 M
- C₂H₆O = 1.50 M
- CH₃COOH = 0.30 M
Considering the molarity, the volume of each compound is calculated as:
- NaCl =
= 0.1355 L
- C₂H₆O =
= 0.0622 L
- CH₃COOH =
= 0.047 L
Learn more about
molar mass:
molarity:
number of moles : 2.14 / 58.44 = 0.0366 moles
V = n / M => 0.0366 / 0.270 = 0.1355 L
__________________________________________
b) C2H6O = 46.06 g/mol
number of moles : 4.30 / 46.06 = 0.0933 moles
V = n / M => 0.0933 / 1.50 = 0.0622 L
___________________________________________
c) CH3COOH = 60.0 g/mol
number of moles : 0.85 / 60.0= 0.0141 moles
V = n / M => 0.0141 / 0.30 = 0.047 L
___________________________________________
hope this helps!