Elements and Compounds

Use the eq'n

moles = mass(g) / Mr

Hence algebraically rearranging

mass(g) = moles X Mr .

Next refer to the Periodic Table for the Atomic Masses of Potassium(K) and Chlorine(Cl).

Potassium chloride has the formula ' KCl '.

Hence

1 x K = 1 x 39.1 = 39.1

1 x Cl = 1 x 35.5 = 35.5

Adding 39.1 + 35.5 = 74.6 ( The Mr of KCl).

Substituting in the eq'n

mass(g) = 2.6 X 74.6

mass = 193.96 g

Plants obtain nitrogen, phosphorus, and potassium primarily through fertilizers. These essential nutrients are often found in both synthetic fertilizers and organic matter, such as compost and manure. Additionally, nitrogen can be acquired from the atmosphere through nitrogen-fixing bacteria associated with certain plants, while phosphorus and potassium are typically sourced from soil minerals. Overall, a balanced supply of these nutrients is crucial for healthy plant growth and development.

Sodium acetate is used in pharmaceuticals as a buffering agent to maintain pH, in IV fluids to replace sodium, and to help treat metabolic acidosis. for more: nsda.gov.bd/pages/static-pages/6922e0f5933eb65569e29537

The chemical symbol for hydrogen bromide is HBr.

By definition, Avogadro's Number, about 6.022 X 1023, for an element is the number of atoms in one gram atomic mass. The gram atomic mass of silver is 107.868. Therefore, the mass of 5.44 X 1025 atoms of silver is [(5.44 X 1025)/(6.022 X 1023)] X 107.868 or 974 grams, to the justified number of significant digits.

To create a fertilizer mixture with 7.7 nitrogen, The Good Seed Flower Shop can use a weighted average of the two fertilizers. Let ( x ) be the fraction of the 7 nitrogen fertilizer and ( y ) be the fraction of the 8 nitrogen fertilizer, with the condition that ( x + y = 1 ). The equation for nitrogen content can be set up as ( 7x + 8y = 7.7 ). By solving these equations simultaneously, the proportions of each fertilizer can be determined.

MgSO4 is magnesium sulphate.

The magnesium cation and the sulphate anion combine ionically.

However, with in the sulphate anion the four oxygens combine with the sulphur covalently

Name of product is Magnesium bromide

Formula is MgBr2

YES!!!! It is an ionic combination of magnesium with bromine.

1 magnesium atom combines ionically with two 2 atoms of bromine.

Mg(s) + Br2(l) = Mg^(2+) aq + 2Br^(-)aq = MgBr2(s)

When magnesium and bromine combine, they form magnesium bromide, a white crystalline solid. This compound is composed of magnesium cations (Mg^2+) and bromide anions (Br^-). Magnesium bromide is commonly used in various chemical processes and as a medication for certain conditions.

There are two elements in magnesium bromide viz., Magnesium and bromine.

NO!!!

Positive ions are named 'CATIONS. e.g. sodium (Na^(+)).

Negative ions are named 'ANIONS'. e.g. bromide (Br^(-)).

S^(2-)

It electron configuration is

1s2, 2s2, 2p6, 3s2, 3p6.

Note that the '3' energy shell has '2+6 = 8 ' electrons completing its octet, and thereby forming the noble gas configuration of Argon (Ar).

NB The electron configuration of sulphur atom is 1s2 , 2s2 , 2p6, 3s2 , 3p4 .

The sodium ion has 'lost' one electron.

As a neutral atoms it has the electron configuration of 1s2 , 2s2, 2p6, 3s1.

As the sodium cation it is 1s2,2s2, 2p6. (the 3s1 has been ionised off).

Helium is a Noble Gas and a Non-metal.

It has the lowest boiling and melting point of any element.

Chlorine.

If you have very slight smell of chlorine it smells like bleach.

You appear to misunderstand.

A charged atom is named an ION. It is NOT an atom.

An atom of any element has a given number of protons.

That same atom when it becomes an ion still contains the same number of protons.

The difference between an atom and an ion is the number of electrons surrounding the nucleus.

e.g.

Sodium

An atom of Sodium contains 11 protons and 11 electrons ; Symbol (Na)

An ion of Sodium contains 11 protons and 10 electrons ; Symbol (Na^(+)).

Note the same number of protons , but a different number of electrons.

NNB If an atom of an element , gains of loses protons, then it becomes a different element. This involves a nuclear reactor; not a chemistry lab.

e.g.

Hydrogen ; 1 proton

Helium ; 2 protons.

An atom, of any element, has three different particles in its construction. They are protons, Neutrons and electrons.

The protons are positively(+) charged, the neutrons have no charge, and the electrons have negative(-) charge.

The protons and neutrons are found un the nucleus of the atom, and are collectively named as nucleons. The electrons are found in energy shells surrounding and outside the nucleus.

Any one element has its own characteristic number of protons and electrons.

Taking carbon as an example. It has six(6) protons and six(6) electrons.

As another example, oxygen has eight( 8) protons and eight (8) electrons.

et.seq.,

The half-life of magnesium in the human body is not precisely defined like that of many drugs or radioactive substances. However, magnesium is primarily stored in bones and soft tissues, and its turnover can vary based on dietary intake, physiological needs, and individual metabolism. Generally, the body regulates magnesium levels efficiently, and excess is excreted through urine. While specific half-life estimates can be complex, magnesium is considered to have a relatively short turnover rate in the body, often within a few days to weeks.

Acetic Acid is a WEAK Acid. it has a moderately low pH of about 3 or 4.

It is NOT a strong acid, nor a base.

Humans can digest weak carboxylic acids like vinegar, lactic acid or citric acid, but CANNOT digest strong mineral acids.

How many carbons are there? The answer is billions of atoms of carbon.

However,

Carbon is an element.

It is No. 6 in Periodic Table.

It has an atomic mass of '12'

It has two further isotopes each with an atomic mass of '13' & '14'.

It has the ability to catenate, form long chains.

It has three allotropes. ; viz. Graphite, Diamond, & Buckminster Fullerene(Footballene).

It is the primary element of Organic Chemistry.

The Chatelut formula is a mathematical expression used in meteorology to estimate the vertical temperature profile of the atmosphere. It relates the temperature difference between the surface and a reference level to the potential temperature gradient. This formula is particularly useful for understanding stability and convection in the atmosphere, aiding in weather predictions and climate modeling. Its application helps meteorologists assess atmospheric conditions that influence weather patterns.

The electron configuration 4s²4p³ corresponds to the element Arsenic (As). It is located in group 15 of the periodic table and has an atomic number of 33. Arsenic is a metalloid known for its various allotropes and is commonly used in semiconductors and alloys.

The sedimentary rock that forms calcium carbonate and fizzes in acid is likely limestone. Limestone is a common sedimentary rock primarily composed of calcite, a form of calcium carbonate. When exposed to acids such as vinegar or hydrochloric acid, limestone will fizz or effervesce due to the release of carbon dioxide gas.

Yes, both limestone and chalk are forms of calcium carbonate. Limestone is a sedimentary rock composed mainly of calcium carbonate, while chalk is a soft, white, porous form of limestone composed of fossilized marine organisms.