All categories

3 years ago

I have my last 3 electrons on the third energy level.

Chemistry

1 answer:

weqwewe [10]3 years ago

5 0

Answer:

an energy level represents the three dimensional space surrounding nucleus where electrons are most likely to be.

Explanation:

You might be interested in

The following properties are either physical or chemical. Which one is different from the rest based on those two categories?

Nadusha1986 [10]

Answer:

Boiling point: physical

Density: physical

Ductility: physical

Heat of combustion: chemical

Explanation:

Chemical properties can only be analyzed by putting the substance through a chemical reaction, such as combustion.

Physical properties can be analyzed without altering the substance chemically. With that in mind:

4 0

4 years ago

Read 2 more answers

Rank the following aqueous solutions in order of increasing (c) freezing point;

saveliy_v [14]

0.01 m $AgNO_{3}$ < 0.03 m $CuSO_{4}$ < 0.04 m urea

As molal concentration rises, so does freezing point depression. It can be expressed mathematically as ΔTf = Kfm.

<h3>What is Colligative Properties ?</h3>

The concentration of solute particles in a solution, not the composition of the solute, determines a colligative properties .

Osmotic pressure, boiling point elevation, freezing point depression, and vapor pressure reduction are examples of ligand-like properties.

<h3>What is freezing point depression?</h3>

When less of another non-volatile material is added, the temperature at which a substance freezes decreases, a process known as Freezing-point depression.

Examples include combining two solids together, such as contaminants in a finely powdered medicine, salt in water, alcohol in water.

An significant factor in workplace safety is freezing points.
If a substance is kept below its freezing point, it may become more or less dangerous.
The freezing point additionally offers a crucial safety standard for evaluating the impacts of worker exposure to cold conditions.

Learn moree about Colligative Properties here:

brainly.com/question/10323760

#SPJ4

5 0

2 years ago

Write the complete balanced equation for the reaction between hydrochloric acid and magnesium hydroxide

Mashutka [201]

Mg(s)+2HCl(aq)→MgCl2(aq)+H2(g) Explanation:

The reaction between magnesium and hydrochloric acid combine to form a salt of magnesium chloride and release hydrogen gas. This single replacement reaction is a classic example of a metal reacting in an acid to release hydrogen gas.

6 0

4 years ago

What is the mass of 22.4 L of H2O at STP?

Andrew [12]

Answer is: A. 18.02 g/mol.

At standard temperature and pressure 1 mol of gas occupied 22.4 liters:
V(H₂O) = 22.4 L; volume of water.
Vm = 22.4 L/mol; molar volume at STP.
n(H₂O) = V ÷ Vm.
n(H₂O) = 22.4 L ÷ 22.4 L/mol.
n(H₂O) = 1 mol; amount of substance (water).
M(H₂O) = Ar(O) + 2Ar(H) · g/mol.
M(H₂O) = 16 + 2 ·1.01 · g/mol.
M(H₂O) = 18.02 g/mol; molar mass of water.

3 0

3 years ago

How many grams of SnO2 are required to produce 1.20x10^21 molecules of water?

Drupady [299]

Answer:

0.150 grams

Explanation:

The balanced chemical reaction to obtain water from SnO₂ is:

SnO₂ + 2H₂ → Sn + 2H₂O

The mole ratio is:

$\dfrac{1molSnO_2}{2molH_2O}$

Find the number of moles equivalent to 1.20× 10²¹ molecules of water, using Avogadro's number:

$1.20\times 10^{21}molecules\times \dfrac{1mol}{6.022\times 10^{23}molecules}=1.9927\times 10^{-3}moles$

From the mole ratio, the number of moles of SnO₂ are half the number of moles of water. That is:

0.0019927 moles / 2 = 0.00099635 moles of SnO₂

Use the molar mass of SnO₂ to convert the number of moles to grams:

molar mass of SnO₂ = 150.71g/mol

mass of SnO₂ = 0.00099635mol × 150.71 g/mol = 0.150 grams.

The answer must be reported with 3 significant figures.

8 0

3 years ago