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3 years ago

What are the steps for writing the formula for a molecular compound? Naming a molecular

Chemistry

1 answer:

Vlad [161]3 years ago

6 0

Answer:

Your question was explained in my chemistry book so I just shared the picture

Hope that helps

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Modern periodic table is based upon atomic number. Explain what does the modern periodic table states about the atomic numbers ?

pickupchik [31]

Answer:

Explanation:Elements of the periodic table are arranged in order of increasing atomic number. The periodic law states “When elements are arranged in order of increasing atomic number, there is a periodic repetition of their chemical and physical properties.”

7 0

3 years ago

Identify the gas law that applies to the following scenario: A 36.5 liter balloon holding 2.9 moles of carbon dioxide leaks. If

Ksenya-84 [330]

Answer:

Avogadro's Law

Explanation:

The amount of moles is directly proportional to the volume of the gas under constant temperature and pressure. That is the statement of Avogadro's law. The equation is:

V1n2 = V2n1

<em>Where V is volume and n are moles of 1, initial state and 2, final state of the gas</em>

<em />

That means, right option is:

<h3>Avogadro's Law </h3>

6 0

2 years ago

How many grams of K2CO3 are needed to prepare a 400.0 mL of a 4.25M solution?

Basile [38]

Answer:

235 g

Explanation:

From the question;

Volume is 400.0 mL
Molarity of a solution is 4.25 M

We need to determine the mass of the solute K₂CO₃,

we know that;

Molarity = Number of moles ÷ Volume

Therefore;

First we determine the number of moles of the solute;

Moles = Molarity × volume

Moles of K₂CO₃ = 4.25 M × 0.4 L

= 1.7 moles

Secondly, we determine the mass of K₂CO₃,

We know that;

Mass = Moles × Molar mass

Molar mass of K₂CO₃, is 138.205 g/mol

Therefore;

Mass = 1.7 moles × 138.205 g/mol

= 234.9485 g

= 235 g

Thus, the mass of K₂CO₃ needed is 235 g

7 0

3 years ago

A cube with edge = 1.00” of an unknown pure substance has a mas off 10.0 oz. what is the density of this substance in g/mL? In k

shepuryov [24]

Answer 1) The density of the cube is found to be 17.30 g/mL

Given the edge that is 1 inch, so to convert it into cc which will be;

1" = 16.38 cc and cc = mL

Convert mass given in oz into g;

10 oz = 283.495 g;

The formula is Mass = Density / Volume

Substituting;

Density = (283.495 / 16.38) = 17.30 g/mL

Hence, the density will be 17.30 g/mL

Answer 2) The density of cube should be 1.738 Kg/L

The same process of conversion can be followed,

To convert Mass in Kg will be 0.02834 Kg and Volume in L it will be 0.0163 L

On solving with the equation of Mass = Density / Volume;

Density = (0.02834 / 0.0163) = 1.738 Kg/L

Here, the density will be 1.738 Kg/L

8 0

3 years ago

A voltaic cell differs from an electrolytic cell in that in a voltaic cell

Fofino [41]

The answer is A. Voltaic cells couple oxidation and reduction half reactions to produce electromotive force from chemical potential energy. Electrolytic cells do the opposite in that they require electromotive force to store chemical energy.

6 0

3 years ago