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3 years ago

N the ionic compound aluminum selenide, each atom of aluminum (gains or loses)

Chemistry

1 answer:

Volgvan3 years ago

6 0

Answer:

loses, gains

Explanation:

In the ionic compound aluminum selenide, each atom of aluminum will lose electrons while each atom of selenium will gain the electrons.

An ionic compound is an interatomic bond formed between a metal and non-metal. The metal is less electronegative compared to the non-metal. In this case, the metal will lose electrons to become positively charged whereas the non-metal, selenium will gain the electron to become negatively charged.

The electrostatic attraction between these oppositely charged ions leads to the formation of the ionic bond.

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From the mass of Al reacted, how many moles are present? What is the mole ratio between Al and H2 in the balanced chemical react

tigry1 [53]

Answer:

From the mass of Al reacted, how many moles are present? We don't have the mass of Al reacted

What is the mole ratio between Al and H2 in the balanced chemical reaction?

By stoichiometry, ratio between Al and H₂ is 3:2

What units are required on the temperature when doing calculations with gases? °K degrees

The value of R is 0.082 L.atm/mol.K

Explanation:

A chemical reaction for this can be this one:

2Al (s) + 6HCl (aq) → 2AlCl₃(aq) + 3H₂ (g)

Balanced

To get the moles which are present in the mass of Al reacted you must calculate:

Al Mass / Al molar mass = Al moles

The Ideal Gas equation is this one:

Pressure . Volume = n° moles . R (gases constant) . T°K

The temperature must be in K, because the units of R

We usually use R = 0.082 L.atm/mol.K

5 0

3 years ago

How many Hydrogen atoms are there in 5 g of NH3? (molar mass of NH3 = 17<br>g/mol)

goldfiish [28.3K]

Answer:5.309 × 10²⁴ atoms.

Explanation:

Given that

molar mass of NH3 = 17 g/mol

Mass of NH3 = 5g

Therefore, No of moles of NH3 = Mass/ molar mass

= 5g/ 17g/mol

= 0.294 moles.

I mole = 6.02 × 10²³ atoms

Therefore the number of hydrogen atoms in a 0.294 moles of ammonia gives us

0.294× 6.02 × 10²³ × 3 ( since there are 3 hydrogens in Ammonia )

= 5.309 × 10²⁴ atoms.

5 0

3 years ago

You have exactly 1.722 x 10^3 eggs. Calculate the dozens of eggs that you have.

Marina CMI [18]

$1.722 \times {10}^{3} = 1722\: eggs$

6 0

3 years ago

What fundamental unit of the metric system always has a prefix in front of it?

nexus9112 [7]

Answer:

Kilogram

Explanation:

The metric system is the Kilogram, meter, second system. These are fundamental quantities of the metric system.

Kilogram, the unit of mass always carries the prefix 'kilo' in its SI unit. Kilogram is the SI unit of mass. Hence, the fundamental unit on the metric system that always has a prefix in front of it is kilogram.

7 0

3 years ago

Gj j<br> Jhj j by hhgrgvddhj

Marizza181 [45]

Answer:

Gj j

Jhj j by hhgrgvddhj=Gj j+jhi j by hhgrgvddhj

hope it helps:)

4 0

3 years ago