Answer:
Iron can not form iron(i) selenide however it can form iron(ii) selenide.
Explanation:
The possible oxidation states of iron are +2 and +3.
Iron can form iron (ii) selenide.
The formula of iron (ii) selenide is FeSe.
In iron (ii) selenide the oxidation state of iron is +2.
The ratio of both atoms are 1:1.
Its molecular weight is 134.82 g/mol.
It is toxic compound.
Its melting point is 965°C.
Its density is 4.72 g/cm³.
Iron can also form iron (iii) selenide.
The formula of iron (iii) selenide is Fe₂Se₃.
In iron (iii) selenide the oxidation state of iron is +3.
The ration of both atoms are 2:3.
It also known as ferric selenide.
Its molecular weight is 348.57 g/mol.
B. One carries warm water and another carries cold water.
C. One begins at the equator, and another begins near the South Pole.
D. They travel to different hemispheres.
Answer:
B. one carries warm water and another carries cold water
The correct answer is B. One carries warm water and another carries cold water.
The Brazil Current and the Gulf Stream are both ocean currents that transport water in different parts of the world. The Brazil Current flows along the eastern coast of South America in the South Atlantic Ocean, while the Gulf Stream flows along the eastern coast of North America in the North Atlantic Ocean.
The Brazil Current carries warm water from the tropics towards the higher latitudes, while the Gulf Stream carries warm water from the Gulf of Mexico towards the North Atlantic. In contrast, the Brazil Current carries warm water and the Gulf Stream carries cold water.
Therefore, option B is the correct answer as it accurately describes the difference between the Brazil Current and the Gulf Stream.
Answer:
1. Temperature
2. Surface area
3. Catalyst
Explanation:
Answer:
Heat, molecular size, and surface area
Explanation:
Heat: higher temperatures are directly correlated to higher kinetic energy. With more kinetic energy, the solute molecules move faster and the bonds are more likely to break.
Molecule size: usually at the same temperature and pressure, the solute with smaller molecular size dissolves faster. A large molecule usually has a heavier weight and size, which makes it more difficult for the solvent to surround it and help break its bonds.
Surface area: increasing surface area generally increases the solubility rate. This is because with a higher area, more molecules are exposed to the solvent, so their bonds are more likely to break.
Degrees Celsius
Grams
Number of molecules
Matter are anything that is made up of atoms. The quantity of matter can be observed only on the basis of mass and volume calculation. Option A, C, D are correct option.
Matter is a substance that has some mass and can occupy some volume. The matter is mainly used in science. Matter can be solid, liquid or gas.
Matter is anything that is made up of atoms. Anything around us that can be physically seen and touched are matter. Ice, water and water vapors are example of matter.
So as we saw that matter has some mass so mass can be measured in gram only. Mass can also be represented as number of molecules. We also saw that matter occupy some volume and that volume is measured only in liter. Degree of Celsius is used to measure temperature which has nothing to do with matter.
Thus option A, C, D are correct option.
To learn more about matter, here:
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Answer:
Degrees Celsius
Explanation:
Just took the test lol
Answer:5
Explanation:The pnictogen group, or nitrogen group, is located in column 15 of the periodic table. This family consists of the elements nitrogen, phosphorus, arsenic, antimony, bismuth, and ununpentium (N, P, As, Sb, Bi, and Uup, respectively). Each member of this family contains five valence electrons.
Nitrogen is found to have either 3 or 5 valence electrons and lies at the top of Group 15 on the periodic table. It can have either 3 or 5 valence electrons because it can bond in the outer 2p and 2s orbitals.
See if that helps
Answer:
Explanation:
The atomic radius of a chemical element is a measure of the size of its atoms, usually the mean or typical distance from the center of the nucleus to the boundary of the surrounding shells of electrons. Since the boundary is not a well-defined physical entity, there are various non-equivalent definitions of atomic radius. Three widely used definitions of atomic radius are: Van der Waals radius, ionic radius, and covalent radius.