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jok3333 [9.3K]
2 years ago
13

If kerosene has a specific gravity of 0.820, what force will be exerted on the circular bottom of a cylindrical kerosene tank th

at has a diameter of 12-ft and a height of 30 ft?
Chemistry
1 answer:
Svet_ta [14]2 years ago
4 0

Answer:

F = 774146.534\,N

Explanation:

The pressure at the bottom of the tank is:

P_{bottom} = (0.820)\cdot (1000\,\frac{kg}{m^{3}})\cdot (9.807\,\frac{m}{s^{2}})\cdot (30\,ft)\cdot (\frac{0.305\,m}{1\,ft} )

P_{bottom} = 73581.921\,Pa

The force exerted on the circular bottom is:

F=(73581.921\,Pa)\cdot (\frac{\pi}{4} )\cdot [(12\,ft)\cdot (\frac{0.305\,m}{1\,ft} )]^{2}

F = 774146.534\,N

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You go fishing and obtain some less weights for your trip. Lead’s density is 11.34 g/mL. If there are 50 weights in a 250 mL box
jekas [21]

Answer:

Mass of each weight = 56.7 gram per piece

Explanation:

Given:

Lead’s density = 11.34 g/mL

Number of weights = 50

Volume of box = 250 mL

Find:

Mass of each weight

Computation:

Mass = volume x density

Mass = 250 x 11.34

Mass = 2,835 gram

Mass of each weight = Total Mass / Number of weights

Mass of each weight = 2,835 / 50

Mass of each weight = 56.7 gram per piece

6 0
3 years ago
How do I find the protons ,neutrons and electrons in an element
nlexa [21]
The atomic number of an element is the same as the number of protons. As long as the atom is neutral, your electrons and protons will be the same number. To find neutrons, you subtract the atomic number from the mass number.

mass number - atomic number = number of neutrons
7 0
3 years ago
the bond formed between the carboxylic acid group of one amino acid and the amino group of the next amino acid is a(n) bond.
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Peptide bonds are amide connections between two amino acids' -carboxyl and -amino groups.

The covalent link created by the dehydration reaction (loss of a water molecule) between the carboxyl group of one amino acid and the amino group on the next is known as a peptide bond. Peptide bonds are created in polypeptides through a condensation reaction between the carboxyl groups of one amino acid and the amino groups of the following amino acid, all while removing water. When the carboxyl group of one molecule combines with the amino group of the other molecule, releasing a molecule of H2O as a result, a peptide bond is created between the two molecules.

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4 0
1 year ago
Which of the following is an oxidation-reduction reaction? Group of answer choices H2CO3 (aq) + Ca(NO3)2 (aq) → 2HNO3 (aq) + CaC
sukhopar [10]

Answer:

Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu(NO3)2 (aq) is an oxidation -reduction reaction

Explanation:

An oxidation-reduction reaction is a chemical reaction that involves a transfer of electrons between two atoms, molecles,.. It is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.

⇒The oxidation state of an individual atom is 0.

⇒The total oxidation state of all atoms in: a neutral species is 0 and in an ion is equal to the ion charge.

⇒Group 1 metals have an oxidation state of +1 and Group 2 an oxidation state of +2

⇒Hydrogen generally has an oxidation state of +1 in compounds

⇒Oxygen generally has an oxidation state of -2 in compounds

H2CO3 (aq) + Ca(NO3)2 (aq) → 2HNO3 (aq) + CaCO3 (s)

Carbon on the left has an oxidation state of -4, on the right it has also oxidation state -4

Nitrogen has on the left an oxidation state of +5, on the right it has also an oxidation state of +5

Calcium has on the left an oxidation state of +2, on the right also an oxidation state of +2

⇒ There is no change of oxidation number so this is NOT a redox reaction

AgNO3 (aq) + HCl (aq) → AgCl (s) + HNO3

Silver (Ag) on the left has an oxidation state of +1, on the right it has also oxidation state +1

Nitrogen has on the left an oxidation state of +5, on the right it has also an oxidation state of +5

Cl has on the left an oxidation state of -1, on the right it has also an oxidation state of -1

⇒ There is no change of oxidation number so this is NOT a redox reaction

Ba(C2H3O2)2 (aq) + Na2SO4 (aq) → BaSO4 (s) + 2NaC2H3O2(aq)

Na has on the left an oxidation state of +1, on the right it has also an oxidation state of +1

Ba has on the left an oxidation state of +2, on the right it has also an oxidation state of +2

S has on the left an oxidation state of +6, on the right it has also an oxidation state of +6

⇒ There is no change of oxidation number so this is NOT a redox reaction

Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu(NO3)2 (aq)

Cu has on the left an oxidation state of 0, on the right it has an oxidation state of +2

Ag has on the left an oxidation state of +1, on the right it has also an oxidation state of 0

⇒ There is a change of oxidation number so this is a redox reaction

Oxidizing agent: Ag in AgNO3 ; Reducing agent: Cu

HCl (aq) + NaOH (aq) → H2O (l) + NaCl (aq)

Na has on the left an oxidation state of +1, on the right it has also an oxidation state of +1

Cl has on the left an oxidation state of -1, on the right it has also an oxidation state of -1

Cu (s) + 2AgNO3 (aq) → 2Ag (s) + Cu(NO3)2 (aq) is an oxidation -reduction reaction

8 0
3 years ago
What is the chemical formula for the compound formed from mg2 and cl-?
maks197457 [2]
The balance chemical reaction describing the reaction between Mg2+ and Cl- is shown below,
 
                                 Mg2+ + 2Cl- ----> MgCl2

This is a reaction where there is a transfer of electrons. Since the valence electron of Mg2+ is 2 and that of Cl- is only 1. There is a need for 2 Cl- to react with 1 Mg2+ in order to balance the equation.

Thus, the anwer is MgCl2.

8 0
2 years ago
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