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natima [27]
3 years ago
8

What is an ion?a) an atom that has either gained or lost electron(s)b) an atom that is sharing electrons with another atomc) an

atom that loses all of its protonsd) an atom that has lost one or more neutrons
Chemistry
1 answer:
Ivan3 years ago
8 0

Answer:

a) an atom that has either gained or lost electron(s)

Explanation:

A neutral atom is an atom that has equal numbers of protons and electrons, its charge is neutral. These atoms are not stable (exceptions are the noble gases), so they need to gain, lose or share electrons to be stable.

When an atom gains or loses electrons, it became an ion, and its charge will not be more neutral. If it gains electrons (which are negative particles) it will have a negative charge and will be called anion; if it loses electrons, it will have a positive charge and will be called cation.

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If a student mixes 75 mL of 1.30 M HNO3 and 150 mL of 6.5 M NaOH. is the final solution acidic, basic, or neutral
raketka [301]

Answer:

The solution is basic.

Explanation:

We can determine the nature of the solution via determining which has the large no. of millimoles (acid or base):

  • If no. of millimoles of acid > that of base; the solution is acidic.
  • If no. of millimoles of acid = that of base; the solution is neutral.
  • If no. of millimoles of acid < that of base; the solution is basic.

  • We need to calculate the no. of millimoles of acid and base:

no. of millimoles of acid (HNO₃) = MV = (1.3 M)(75.0 mL) = 97.5 mmol.

no. of millimoles of base (NaOH) = MV = (6.5 M)(150.0 mL) = 975.0 mmol.

<em>∴ The no. of millimoles of base (NaOH) is larger by 10 times than the acid (HNO₃).</em>

<em>So, the solution is: basic.</em>

4 0
3 years ago
4. A student is doing experiments with CO2(q) . Originally a sample of the gas is in a rigid container at 299 Kand 0.70 atm. The
marta [7]

Answer:

b. 0,99atm

c. Answer is in the explanation

d. Answer is in the explanation

Explanation:

b. Using Gay-Lussac's law:

P₁T₂ = P₂T₁

P₁: 0,70 atm; T₂: 425K; P₂: ??; T₁: 299K

0,70atm×425K / 299K = <em>0,99 atm</em>

c. Using kinetic molecular theory, the increasing of temperature increases the kinetic energy of gas particles and if kinetic energy increases, the pressure increases. That means the increasing of temperature increases the pressure in the system.

d. Now, the increases in kinetic energy of gases increase the collisions betwen particles. As these intermolecular forces that are not taken into account in ideal gas law, the observed pressure will be different to the pressure predicted by ideal gas law.

I hope it helps!

8 0
3 years ago
Within a group, does the radii of atoms increase or decrease as the atomic
EleoNora [17]

Answer:increase

Explanation: the more electrons there are the bigger the electron field is and the bigger the atomic radii is

8 0
3 years ago
A gas is allowed to expand from a volume of 400 ml to 2000 ml at a constant temperature. If the the initial pressure is 3 atm, c
Lostsunrise [7]

Answer:

P_{2}) = 0.6 \; atm

Explanation:

<u>Given the following data;</u>

Initial volume = 400 mL

Final volume = 2000 mL

Initial pressure = 3 atm

To find the final pressure P2, we would use Boyles' law.

Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.

Mathematically, Boyles law is given by;

PV = K

P_{1}V_{1} = P_{2}V_{2}

Substituting into the equation, we have;

3 * 400 = P_{2}* 2000

1200 = 2000P_{2}

P_{2}) = \frac {1200}{2000}

P_{2}) = 0.6 \; atm

8 0
3 years ago
When would you need the fight or flight response?
Naya [18.7K]

Answer:

When you have the feeling of danger and you either don't want to face it or you want to face it.

Explanation:

4 0
3 years ago
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