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Simora [160]
3 years ago
6

What is the volume of a cubic salt crystal measuring 2.44 × 10-2 m by 1.4 × 10-3 m by 8.4 × 10-3 m?

Chemistry
2 answers:
Artemon [7]3 years ago
7 0

V = ( 2.44 x 10⁻² ) x ( 1.4 x 10⁻³ ) x ( 8.4 x 10⁻³ )

V = 2.9 x 10⁻⁷ m³

hope this helps!
Alik [6]3 years ago
3 0

Question 7: What is the volume of a cubic salt crystal measuring 2.44 × 10-2 m by 1.4 × 10-3 m by 8.4 × 10-3 m?

Answer: V = <em> V = 2.9 x 10⁻⁷ m³</em>

<em />

Question 8: Which temperature scale has no negative temperatures?

Answer: <em>Kelvin</em>

<em />

Question 9: Which of the following mass units is the largest?

Answer: <em>1 dg</em>

.

.

. Follow this link to my quizlet to find more answers to connexus tests!

.                            https://quizlet.com/_6z54hw

.

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why was the mass lost when the reaction was done in the normal setup but stayed the same when it was done in the gas collection
german
<h2>Answer : Law of conservation of mass</h2><h3>Explanation :</h3>

The law of conservation of mass states that in any reaction mass is neither created nor lost it has to remain constant in a system.

In this case, when the reaction setup was done in normal way the mass was  lost in surrounding was not considered nor being calculated; whereas when the reaction was studied in a closed system where the gas was collected after the reaction the mass changes was noted down which helped to prove the point of law of conservation of mass and energy.

One can consider an example of soda can where the carbonated drink contains pressurized carbon dioxide gas. when opened the gas bubbles gets lost into the surroundings and we don't measure the mass changes. Instead if the soda can was opened in such a way where the gas evolved was measured then the mass changed would remain the same.

6 0
3 years ago
Which of the following elements would form the smallest ionic radius and why?
AnnyKZ [126]

Answer:

Sodium

Explanation:

5 0
3 years ago
At what temperatures is a reaction that has a positive change in entropy
Setler [38]

Answer:

the answer is A

I made a chart for AP chem if you want to refer to it.

3 0
3 years ago
What is the significance sodium hydroxide and hydrochloric acid
hammer [34]

Answer:

They are a base and an acid,  so they neutralize each other.

Explanation:

Sodium hydroxide is a strong base. Hydrochloric acid is a strong acid.

They react with (neutralize) each other to form a salt (sodium chloride) and water.

NaOH + HCl ⟶ NaCl + H₂O

5 0
3 years ago
If an element has 2+ valence electrons, does it transfer only one or more than one valence electrons​
just olya [345]

Answer:

element having 2+ valence electrons can transfer its more than one electron that is 2 electron completely.

Explanation:

  • Group IIA have 2+ valency and two electrons in its valance shell.
  • Its Electropositivity is  high and have the tendency to donate it two electrons.
  • Element  of IIA form ionic with most electronegative element.

Examples:

Cu²⁺, Mg²⁺, Sr²⁺ are examples having  2+ valance electron

one of the following is examples of element that have 2+ valence electrons

MgCl₂

Atomic number of Magnesium (Mg) is 12

Electronic Configuration of Mg:

1s², 2s², 2p⁶, 3s²

or

K =2

L = 8

M = 2

So, it have to give its 2 electrons to form a stable compound.

Similarly

Chlorine atomic number is 17

Electronic Configuration of Chlorine:

1s², 2s², 2p⁶, 3s², 3p⁵

or

K =2

L = 8

M = 7

So, it have to gain one electrons to form a stable compound and complete its octet.

So,

Two chlorine atom as a molecule gain 2 electrons from Mg²⁺ atom

So one Mg²⁺ and 2 Cl⁻ atoms form an ionic bond

where in this ionic bond Mg²⁺ transfer its 2 valence electron completely and chlorine molecule accept 2 electrons.

                 Cl-----Mg------Cl

So the Answer is

element having 2+ valence electrons can transfer its more than one electron that is 2 electron completely.

8 0
3 years ago
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