What is the molarity of a solution of 14.0 g NH4Br in enough H20 to make 150 mL of solution?

Answers

Answer 1

Answer: Mass of solute = 14,0 g

Molar mass ( NH4Br ) = 14 + 1 . 4 + 80 = 98 g/mol-1

volume of the solution = 150 mL = 0,15 L

Molarity of the solution = mol/L-1

$M = (m)/(mm.V)$

$M = (14,0)/(98.0,15)$

$M = (14,0)/(14,7)$

$M = 0,952 mol/L ^(-1)$

Hope this helps!

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A molecule of an organic compound contains at least one atom of(1) carbon (3) nitrogen(2) chlorine (4) oxygen
Which element is capable of forming long chains by forming single, double, or triple bonds with itself?
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Suppose that a certain fortunate person has a net worth of $79.0 billion ($7.90×1010). If her stock has a good year and gains $3.20 billion (3.20×109) in value, what is her new net worth?

Answers

A net worth: $79.0 billion.
Value of stock : $3.20 billion.
New net worth:
$79.0 + $3.20 = $82.20 billion = $82.20 * 10^9 = $8.20 * 10^10

Answer:

$8.20 * 10^10

Explanation:

What is the chemical name for Fe(HCO3)2

Answers

The answer is Iron(II) Hydrogen Carbonate. It can also be known or referred as Ferrous Hydrogen Carbonate or even Iron(II) Bicarbonate. The known formula for this chemical is Fe(HCO3)2. The Molar Mass of this chemical is known as 177.8787. Here are some chemical reactions that may be equivalent to this chemical: FeCO3 + H2CO3 = Fe(HCO3)2; or Fe(HCO3)2 = FeCO3↓ + CO2 + H2O; or Fe(HCO3)2 + 2HNO3 = Fe(NO3)2 + 2H2O + 2CO2

The chemical name for Fe(HCO₃)₂ is iron(II) bicarbonate.

Iron (II) compounds typically form coordination complexes with ligands that have a higher affinity for binding to the iron ion. Bicarbonate is a relatively weak ligand and is more commonly found as a component of soluble salts, such as sodium bicarbonate (NaHCO3) or potassium bicarbonate (KHCO3).

In this compound, the iron ion has a +2 charge, and the bicarbonate ion (HCO3-) has a -1 charge. When these ions combine, the resulting compound is named accordingly with the Romannumeral (II) to indicate the iron ion's charge.

To learn more about the chemical name, follow the link:

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How can there be more than 1000 different atoms when there are only about 100 different elements?

Answers

Actually, there are only about 100 atoms that have been yet discovered. But each element has many different kinds of atom. For instance, carbon. Do you know carbon has more than 30 or 50 different types of atoms? Well, how? There are isotopes. Don't think that there is only one carbon atom which has 6 electrons and 6 protons and 6 neutrons. There are more. C-13 has 6 electrons and 6 protons and 7 neutrons. While, C-14 has 6 electrons and 6 protons and 8 neutrons. I just showed you three stable isotopes of carbon(element). But, what is really an isotope?? Did you notice that all of these atoms had the same number of protons and electron but different numbers of neutrons? This is really an isotope. Well, if an atom takes a few more electrons or gives off a few electrons, it still stays the same element/ atom type. Just like that an element can have atoms of different neutron number. It may be less or more. It doesn't affect the atom much: just makes an isotope. But it does affect the atomic mass number or radioactivity of an atom. So, an element can have many different forms of isotopes of its atoms. In this way, being only 100 atoms, there can 1000 atoms or (more than that!).

To make it more clear-

Definition of ISOTOPE: any of two or more forms of a chemical element, having the same number of protons and electrons in the nucleus, or the same atomic number, but having different numbers of neutrons

HOPE YOU UNDERSTOOD THE MATTER:-))

There can be more atoms because atoms make about everything and those atoms make up the elements and since,atoms are in everything there can be different kinds of atoms to make up certain things.

It's Peggy Sue's birthday and she's about to blow out the candles on her cake. Brother Roger stops the party when he shouts: "Look at that! Chemical and physical changes taking places on your birthday cake!"How would you respond to Roger?
A) Roger is incorrect. The melting wax is a physical change but there is no chemical change taking place.
B) Roger is correct. Lighting the match is a chemical change and burning the candles is a physical change.
C) Roger is correct. The melting wax is a physical change and the burning candle wick is a chemical change.
D) Roger is incorrect. Only a chemical change is taking place as evidenced by the light and heat of the burning candles.

Answers

Melting of wax is a physical change and chemical change is the burning of candle.

What is chemical and physical changes?

Chemical changes are those changes by which composition of the original matter changes and physical changes are those changes by which only appearance of the matter changes.

In the given activity:

Melting of wax is a physical change because during this composition of wax not changes but only outer structure changes.
Burning of candle and lighting the match are chemical change as it produces energy in the form of heat and light.

Hence, Roger is correct ie. The melting wax is a physical change and the burning candle wick is a chemical change.

To know more about physical and chemical changes, visit the below link:
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This example is an controversial matter because melting an candle is considered as both physical change and chemical change because no new substances were made by melting an candle. The final answer is C.

The valence of aluminum is +3, and the valence of chlorine is –1. The formula for aluminum chloride iscorrectly written as
A. ClAl3.
B. Cl3Al.
C. AlCl3.
D. Al3Cl.

Answers

The correct option is C.i.e. AlCl3Given:The valence of aluminum is +3, and the valence of chlorine is –1. Thus, 3 chlorine atoms each of (-1 charge )combine to make the charge balance because of Al (3+). Thus, 1 atom of Aluminum (Al) binds with three atoms of Chlorine (Cl).Thus, the net foromula becomes AlCl3

AICI3

which is choice c.

Aluminium chloride

Chemical compound

DescriptionAluminium chloride is the main compound of aluminium and chlorine. It is white, but samples are often contaminated with iron(III) chloride, giving it a yellow color. The solid has a low melting and boiling point. Wikipedia

IUPAC ID: aluminium chloride

Molar mass: 133.34 g/mol

Soluble in: Water

Related Lewis acids: Iron(III) chloride; Boron trifluoride

Heat capacity (C): 91.1 J/mol·K

Other names: aluminium(III) chloride; aluminum trichloride

Which compound has the strongest hydrogen bonding between its molecules? 1. HBr 2. HF 3. HCl 4. HI

Answers

You can compare the strength of the hydrogen bonding by comparing the electronegativities of the other elements. All the four elements, Br, F, Cl and I belong to the same group in the periodic table: group 17 named halogens. Then the kind of bonding they form is similar: polar covalent. You must know the trend of the electronegativities in the periodic table. Electronegativity decrease when you down across a group. Then the electronegativity of F is the higher of the group (indeed, it is the highest of all the 118 elements) . The higher the electronegativity the stronger the attraction that the halogen attracts the electrons and the stronger the hydorgen bonding. Then, the conclusion is that HF has the strongest hydrogen bonding.

The correct answer is HF

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