Elements and Compounds

Agreed with anonymous.

Oxygen form 20% of the Earth's atmosphere, together it is coom,bined in many rocks as oxides.

Photosynthesis, is a very fast reaction, with an equilibrium in favour of oxygen production. This is because any CO2 produced is immediately absorbed by green plants. Undergoes photosynthesis in presence of UV(Sun) light, and immediately liberates oxygen. The Carbon component remains in the plant as biomass.

One common element found in social problems is inequality, which can manifest in various forms such as economic disparity, racial discrimination, or gender bias. This inequality often leads to marginalized groups facing systemic barriers that limit their access to resources and opportunities. Additionally, social problems frequently arise from a lack of social cohesion and trust within communities, exacerbating tensions and conflicts. Addressing these issues requires a multifaceted approach that promotes equity and inclusivity.

Electrons in a C-O bond are closer to the oxygen atom because oxygen is more electronegative than carbon. This means oxygen has a stronger ability to attract and hold onto the shared electrons in the bond. As a result, the electron density shifts towards oxygen, creating a polar bond where the oxygen atom acquires a partial negative charge, while the carbon atom becomes partially positive. This difference in electronegativity leads to the unequal sharing of electrons in the bond.

The element with a mass number of 47 is silver (Ag). Silver has an atomic number of 47, which means it has 47 protons in its nucleus. The mass number indicates the total number of protons and neutrons, so an isotope of silver with a mass number of 47 has 47 nucleons in total. The most stable isotope of silver, silver-47, is used in various applications, including medical imaging and treatments.

To find the mass of 3.011 × 10²³ atoms of fluorine (F), first note that the molar mass of fluorine is approximately 19.00 g/mol. Since 1 mole contains Avogadro's number (approximately 6.022 × 10²³) of atoms, the number of moles in 3.011 × 10²³ atoms is 3.011 × 10²³ / 6.022 × 10²³ ≈ 0.5 moles. Therefore, the mass is 0.5 moles × 19.00 g/mol = 9.50 grams.

Period '6' . It is in the Lanthanide Period.

It has the chemical symbol 'Eu', its atomic no. (Z) is 63 and its atomic mass is 152.0

Peroxide is an compound that can be a part of another chemical to form a molecule. Hydrogen peroxide is two hydrogen atoms attached to a peroxide molecule, forming hydrogen peroxide.

Peroxide itself (O2) only exists as molecular oxygen when it is not attached to another chemical.

As the name suggests, hydrogen peroxide has in it ,hydrogen and oxygen.

Its formula is H2O2.

Structurally, it is ' H-O-O-H '.

The 'per---' in the formul/structure means that the two oxygens are singly bonded together. This type of bond is rather unstable and makes 'peroxides' in general a reactive species.

As H2O2 it is uncharged , but rather unstable., and will slowly decompose to water and oxygen.

Hydrogen phosphate or Phosphoric Acid has the formula H3PO4 ; No charge.

The Anion, digydrogen phosphate ' H2PO4^(-) has a charge of '-1'

The anion, monohydrogenphosphate ' HPO4^(2-) has a charge of '-2'.

The chemical formula for dihydrogen phosphate ion is H2PO4-

The formula is ' NaH2PO4 '.

The 'dihydrogen' means two(2) hydrogens.

There is NO symbol for sodium phosphate. It is a chemical formula.

The chemical formula is ' Na3PO4 '.

Use the equation.

moles = mass(g) / Mr

The 'Mr' is the Relative Molecular Mass of any substance. You take the Atomic masses from the Periodic Table.

So taking water as an example

The formula for water is H2O

From this formula we know that there are two(2) hydrogen(H) atoms and one(1) oxygen atom(O).

From the Periodic Table the atomic mass of 'H' is '1' and the atomic mass of 'O' is '16'.

So using the formula and the masses

we have

2 x H = 2 x 1 = 2

1 x O = 1 x 16 = 16

We then add these two numbers. 2 + 16 = 18 .

'18' is the 'Mr' of water (H2O).

So calculating the number of moles of water in say 72 grams.

Substitute in

moles(H2) = 72 g / 18

moles(water). = 4

NB Since pure water at STP(Room temperature and air pressure) the scientific standard is 1 gram = 1 cm^(3)

So if you have a measuring cylinder, and put into it 72 cm^(3) of water , you have 72 grames of water, and by the above calculation , you also have 4 moles of water.

NNB moles = mass(g) / Mr

This is a mathemtical equation and can be algebraically rearranged to

Mass(g) = moles X Mr

or

Mr = mass(g) / moles.

Hope that helps!!!!!

ONE(1) mole.

6.022 x 10^(23) is the Avogadro Number. Which is a constant for the number of atoms of any element in one mole.

So for Neon(Ne) the number represents one mole of neon atoms.

not sure

The position of an element in the periodic table influences its electronegativity, atomic size, and ionization energy, which in turn affect the type of bonds it forms in minerals. Elements on the left side, such as metals, tend to lose electrons and form ionic bonds, while nonmetals on the right side typically gain electrons, leading to covalent bonds. Additionally, elements in the same group exhibit similar bonding characteristics due to their comparable valence electron configurations. Thus, an element's position directly correlates with its bonding behavior in mineral formation.

The dissolution reaction for lead(II) nitrate, Pb(NO₃)₂, in water can be represented as follows:

[ \text{Pb(NO}_3\text{)}_2 (s) \rightarrow \text{Pb}^{2+} (aq) + 2 \text{NO}_3^{-} (aq) ]

In this reaction, solid lead(II) nitrate dissociates into lead ions (Pb²⁺) and two nitrate ions (NO₃⁻) when it dissolves in water.

You can purchase 50 lb bags of ammonium nitrate at agricultural supply stores, farm co-ops, or garden centers in Mississippi. Retailers such as Tractor Supply Company or local feed and seed stores often carry this product. Additionally, you may want to check online marketplaces or agricultural chemical suppliers that deliver to your area. Always ensure to follow local regulations regarding the purchase and use of ammonium nitrate.

Betelgeuse, a red supergiant star in the constellation Orion, primarily consists of hydrogen (around 74%) and helium (about 24%). It also contains heavier elements, including carbon, oxygen, and nitrogen, which are produced through nuclear fusion in its core. These elements contribute to its distinctive spectral characteristics and play a role in the star's lifecycle as it evolves towards supernova.

In general, as the number of carbon atoms in a hydrocarbon increases, the boiling point tends to rise. This is due to the greater surface area and increased van der Waals forces between larger molecules. Additionally, linear hydrocarbons typically have higher boiling points compared to their branched counterparts, as branching decreases surface area and intermolecular interactions. Overall, the phase of hydrocarbons at room temperature can be predicted based on their molecular size, with smaller hydrocarbons being gaseous and larger ones being liquid or solid.

It is definitely a compound.

It is a combination of two elements, viz. hydrogen(H) and bromins(Br) to give the chemical formula ' HBr '.

The chemical formula of hydrobromic acis is HBr.

Hydrobromic acid (HBr) can be derived from hydrogen bromide (H2O) through dissolution in water. When hydrogen bromide is dissolved in water, it forms hydrobromic acid due to the reaction: H2O + HBr → H3O+ + Br-.

The indicators of a chemical reaction are :-

1. Change in colour

2. Change in temperature

3. Evolution of a gas

4. Formation of a precipitate