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3 years ago

When determining an element’s chemical properties, the most important subatomic particle to look at is

Chemistry

1 answer:

Crank3 years ago

8 0

Answer:

Electrons

Explanation:

When determining the chemical properties of elements, the most important subatomic particle to consider is the electrons.

Electrons are negatively charged particles that orbits an atom. They occupy the extranuclear space of an atom.

These electrons determines the chemical properties of each atom. Most especially, the valence ones. All elements wants to resemble the noble gases, so they alter their number of electrons in order to attain this stable state.

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A neutral atom posses an atomic number of 13 and an atomic mass of 27 three electrons are lost. From which regio of an atom arr

AleksAgata [21]

Theyre lost from the atomic number

8 0

3 years ago

I need numbers 8 and 9. Thank you.

Sophie [7]

313.110 for number 8

9) is 270.3003

hope this help!

5 0

2 years ago

An airplane has a mass of 12,000kg. If it is accelerating at 16m/sec2, what is its force?(round to the nearest whole number) NEE

icang [17]

Answer:

$F=1.92x10^5N$

Explanation:

Hello!

In this case, since the force exerted by an object with a certain mass an acceleration is:

$F=m*a$

We can plug in the given mass of 12,000 kg and acceleration of 16 m/s^2 to obtain:

$F=12,000kg*16m/s^2\\\\F=192,000kg*m/s^2\\\\F=1.92x10^5N$

Best regards!

8 0

2 years ago

What is the percent by mass of water in Na S04.10H20?

dalvyx [7]

Answer:

Percent by mass of water is 56%

Explanation:

First of all calculate the mass of hydrated compound as,

Mass of Sodium = Na × 2 = 22.99 × 1 = 45.98 g

Mass of Sulfur = S × 1 = 32.06 × 1 = 32.06 g

Mass of Oxygen = O × 14 = 16 × 14 = 224 g

Mass of Hydrogen = H × 20 = 1.01 × 20 = 20.2 g

Mass of Na₂S0₄.10H₂O = 322.24 g

Secondly, calculate mass of water present in hydrated compound. For this one should look for the coefficient present before H₂O in molecular formula of hydrated compound. In this case the coefficient is 10, so the mass of water is...

Mass of water = 10 × 18.02

Mass of water = 180.2 g

Now, we will apply following formula to find percent of water in hydrated compound,

%H₂O = Mass of H₂O / Mass of Hydrated Compound × 100

Putting values,

%H₂O = 180.2 g / 322.24 g × 100

%H₂O = 55.92 % ≈ 56%

3 0

3 years ago

When preparing a buret for use in lab, the buret must always be cleaned thoroughly. prior to being filled with solution, the bur

erastova [34]

It is rinsed one last time with the solution to be measured because if there is water in the burret, then it could alter the results. Slightly, but it is still altering it.

6 0

3 years ago