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In Reply to: WWWBoard Version 2.0! posted by Sadie on February 15, 2024 at 23:06:39:

Calcium does not fully react with sulfuric acid because it forms an insoluble
salt, calcium sulfate (CaSO4), during the reaction. While calcium can react with s
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Elements and Compounds

Which organisims help convert gaseous nitrogen into ammonia in the nitrogen cycle?

Asked by Anonymous

In the nitrogen cycle, nitrogen-fixing bacteria play a crucial role in converting gaseous nitrogen (N₂) into ammonia (NH₃).

These bacteria, such as Rhizobium, l
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Chemistry

+1

What is Chemical Symbol of Chlorine Molecule?


Asked by Anonymous

The chemical symbol for a chlorine molecule is Cl₂, indicating that it consists
of two chlorine atoms bonded together. Chlorine is a diatomic molecule, meaning
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Chemistry

+1

What is this formula called N2H8SO4?


Asked by Anonymous

The formula N2H8SO4 represents a compound known as hydrazine sulfate.
It consists of two nitrogen (N) atoms, eight hydrogen (H)
atoms, one sulfur (S) atom, and
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Elements and Compounds

What does it mean when you miss a family member and she
died alredy?


Asked by Anonymous

Missing a family member who has passed away often reflects the deep emotional bond
you shared and the impact they had on your life.
It can signify feelings of g
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Elements and Compounds

What was the first member of the canine family?


Asked by Anonymous

The first member of the canine family, known as Canidae, is believed to
be the extinct genus Eucyon, which existed around 10 million years ago during the Miocen
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Chemistry

+1

What is the name of the compound that has 1 sulphur and 2 oxygens in it?

Asked by Anonymous

The compound that contains one sulfur atom and two oxygen atoms is called sulfur dioxide (SO₂).
It is a colorless gas with a pungent odor and is commonly produc
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Elements and Compounds

+1

Why is Hydrogen an electropositive element?


Asked by Anonymous

Hydrogen is considered an electropositive element because it has a
single electron in its outer shell, allowing it to easily lose that electron and form
a posit
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Alternative Medicine

+1

What are the physical properties of sodium citrate?


Asked by Anonymous

Sodium citrate is a white, crystalline powder that is hygroscopic, meaning
it can absorb moisture from the air. It is soluble in water, forming a clear solution
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Elements and Compounds

+1

How many mg of potassium in 1 cup of raspberries?


Asked by Anonymous

One cup of raspberries contains approximately 186 mg
of potassium. This fruit is not only a good source of potassium but also
provides dietary fiber, vitamins,
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Elements and Compounds

Why both oxygen and carbon dioxide enter and leave the plant?

Asked by Anonymous

Oxygen and carbon dioxide both enter and leave the plant through small openings called stomata, which are primarily
located on the underside of leaves. During p
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Salt (Sodium Chloride)

+1

What is a extensive property of sodium chloride?


Asked by Anonymous

An extensive property of sodium chloride (NaCl) is its mass.

Extensive properties depend on the amount of substance present,
meaning that the mass of sodium chl
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Science

+2

Why would we need to know the conductivity of
a unknown substance?


Asked by DanielConbuttertonfb3668

Knowing the conductivity of an unknown substance helps
identify its ionic or molecular nature, which is crucial in various
fields such as chemistry, materials s
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Elements and Compounds

+1

What is carbon and fluorine molecular formular?


Asked by Anonymous

The molecular formula for a compound consisting of carbon and fluorine can vary depending on the specific compound.
For example, the simplest binary compound is
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Elements and Compounds

+1

What row is calcium in?


Asked by Anonymous

Calcium is located in the 4th row (or period) of the periodic table.
It is a member of the alkaline earth metals,
found in Group 2. This means it has four elect
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Chemistry

+1

How many moles of potassium oxide (K2O) will be formed when 1.52 moles of potassium
reacts with oxygen according to the following reaction 4 K O2 2 K2O?


Asked by Anonymous

According to the reaction (4 \textK + \textO_2 \rightarrow 2
\textK_2\textO), 4 moles of potassium produce 2 moles of potassium oxide (K2O).

Thus, the m
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Science

+2

How many copper atoms are present in a 94.5 g sample of copper?


Asked by Anonymous

To find the number of copper atoms in a 94.5 g sample, first determine the molar
mass of copper, which is approximately 63.55 g/mol.
Using the formula ( \text{m
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Chemistry

+1

What is the theoretical yield of aluminum oxide if 1.60 Mol of aluminum metal is exposed to 1.50 Mol
of oxygen?


Asked by Anonymous

To determine the theoretical yield of aluminum oxide (Al₂O₃), we start with the balanced chemical
reaction: 4 Al + 3 O₂ → 2 Al₂O₃. From the stoichiometry,
4 mol
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Elements and Compounds

+1

How many atoms are in the compond (NH4)3PO4?


Asked by Anonymous

The compound (NH4)3PO4, known as ammonium phosphate, contains
a total of 20 atoms. It consists of 3 ammonium ions (NH4), which contribute 12 hydrogen atoms and
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Elements and Compounds

+1

When did lord kelvin disagree that radium was an element?

Asked by Anonymous

Lord Kelvin, also known as William Thomson, expressed skepticism about
radium being an element in the early 1900s, particularly around 1903.
He questioned the i
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Elements and Compounds

Does King Mackerel contain iodine?


Asked by Anonymous

Yes, King Mackerel does contain iodine, as it
is a common trace mineral found in many types of fish and seafood.
The iodine content can vary depending on the fi
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Elements and Compounds

+1

Which elements are most likey to from a positive ions when they bony?

Asked by Anonymous

Elements that are most likely to form positive ions,
or cations, are typically metals found on the left side of the
periodic table, particularly alkali metals (
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Elements and Compounds

+1

Is barium hydroxide aqueous or solid?


Asked by Anonymous

Barium hydroxide is typically encountered as a solid
at room temperature. However, it can dissolve in water to form a barium hydroxide solution, which is referr
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Elements and Compounds

+1

How many electrons must antimony gain or lose to have a noble gas electron configuration?


Asked by Anonymous

Antimony (Sb) has an atomic number of 51 and is located in group 15 of the periodic table.
To achieve a noble gas electron configuration, antimony
typically gai
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Elements and Compounds

+2

Can nitrogen form a double bond with carbon?


Asked by Anonymous

Yes, nitrogen can form a double bond with carbon. This occurs
in compounds such as imines and nitriles, where
nitrogen shares two pairs of electrons with carbon
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