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Nataliya [291]
3 years ago
5

4) What is the difference between an atom and an ion?

Chemistry
2 answers:
seropon [69]3 years ago
3 0

Answer:  Explanation:

Atom means the smallest possible amount of matter which still retains its identity as a chemical element, now known to consist of a nucleus surrounded by electrons.

<u>Iron</u> means a common, inexpensive metal, often black in color, that rusts, is attracted by magnets, and is used in making steel.

DaniilM [7]3 years ago
3 0

Answer: Atoms are neutrally charged; they contain the same number of protons as electrons. By definition, an ion is an electrically charged particle produced by either removing electrons from a neutral atom to give a positive ion or adding electrons to a neutral atom to give a negative ion.

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If have a volume of 18 L of a gas at a temperature of 272 K and a pressure of 90 atm, what will be the pressure of the gas if ra
Solnce55 [7]

Answer:

P₂ ≅ 100 atm (1 sig. fig. based on the given value of P₁ = 90 atm)

Explanation:

Given:

P₁ = 90 atm                    P₂ = ?

V₁ = 18 Liters(L)              L₂ = 12 Liters(L)      

=> decrease volume => increase pressure

=> volume ratio that will increase 90 atm is (18L/12L)                                                                  

T₁ = 272 Kelvin(K)          T₂ = 274 Kelvin(K)

=>  increase temperature => increase pressure

=> temperature ratio that will increase 90 atm is (274K/272K)

n₁ = moles = constant    n₂ = n₁ = constant

P₂ = 90 atm x (18L/12L) x (274K/272K) = 135.9926471 atm (calculator)

By rule of sig. figs., the final answer should be rounded to an accuracy equal to the 'measured' data value having the least number of sig. figs. This means P₂ ≅ 100 atm based on the given value of P₁ = 90 atm.

3 0
3 years ago
Every ribosome has three tRNA binding sites: the A site, the P site, and the E site. For the given sentences, select the correct
alex41 [277]

Answer:

A. All sites B. A site C. E site D. P site

Explanation:

A. Because all sites consequently take place while peptide is synthesized.

B. A site (aminoacyl site) is called so because it binds to charged aminoacyl peptide.

C. Because it is the exit site and it takes the final stage on the uncharged molecule.

D. The P site (peptidil site which takes main role in peptide synthesis.

8 0
3 years ago
Read 2 more answers
2. What happens to the heat in an exothermic reaction?
Mashutka [201]

Answer:

An exothermic reaction occurs when the temperature of a system increases due to the evolution of heat. This heat is released into the surroundings, resulting in an overall negative quantity for the heat of reaction

Explanation:

1 million percent sure! GIMME BRAINLIEST PLS need 3 more to level up to new rank

5 0
3 years ago
What is the poH of a 3.67 x 10-5 M OH solution and is it acidic, basic, or neutral?
Anni [7]

Answer:

The pOH is  4, 44 and the solution is basic.

Explanation:

The pOH is a measure of the concentration of OH (hydroxyl) ions in the solution.

The pOH is calculated as :

pOH = -log (OH-)= -log (3.67 x 10-5 )= 4, 44. In this case, the solution is basic.

The p0H scale ranges from values of 0 to 14 (less than 7.0 is basic and greater than 7.0 is acidic, a pH = 7.0 is neutral)

3 0
3 years ago
Which is NOT a sign that a double displacement reaction has occurred?
kramer

the coefficients are equal is NOT a sign that a double displacement reaction has occurred

<u>Explanation:</u>

Usually during solutions of two ionic compounds are combined a precipitate (solid) is created. The mix may become cloudy, or may also separate, with the solids falling at the seat of the receptacle. Infrequently, the mix may bubble as a gas or water is produced.

A precipitation reaction is at two aqueous ionic compounds that make a unique ionic compound that is not soluble in water. The insoluble product compound is called the precipitate. The reaction, in this case, is not balanced, which are evaluated  by summing coefficients.

3 0
3 years ago
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