How to convert Gdm-3 to moldm-3

Answers

Answer 1

Answer: Since it is still in dm^-3 (which is basically a Litre)

You just need to convert the g into moles using the formula:

moles = mass/molar mass

= 5.6/(39.1+16+1)

= 5.6/56.1

= 0.1 moles

So this makes it 0.1 moles dm^-3

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An atom that has 14 protons and 17 neutrons is an isotope of which element?

Answers

This is an isotope of silicon since it has 14 protons. for an element, you can have different numbers of neutrons, however, if you change the number of protons the identity of the element changes.

for example, carbon 14 and carbon 12 both have 6 protons. The only thing that changed was the number of neutrons which went from 6 to 8.

You compare the gas generated from a reaction using two antacid tablets with the gas generated from a reaction using four antacid tablets (consider the antacid to be the limiting reagent). At constant pressure and temperature, how do the volumes of the gases compare?Question 4 options:

The gas generated by four antacid tablets has a greater volume

The gas generated by two antacid tablets has a greater volume

The two reactions produce the same amount of gas

I don't know

Answers

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

At constant pressure and temperature, The gas generated by four antacid tablets has a greater volume. The answer should be the first option.

Answer: The correct answer is the gas generated by four antacid tablets has a greater volume

Explanation:

In the question, it is given that pressure and temperature of the gas remain constant and we need to compare the volume of the gas produced by 4 antacid tablets and 2 antacid tablets.

As, antacid is the limiting reagent. Hence, more the tablets, more gas will be produced.

Hence, more gas will be produced by four antacid tablets than the gas produced by 2 antacid tablets.

To compare the volume, we use Avogadro's Law which states that volume is directly proportional to the number of the gas at constant pressure and temperature.

$V\propto n$ (At constant Temperature and Pressure)

Hence, volume will be greater for the gas produced by four antacid tablets.

Therefore, the correct answer is the gas generated by four antacid tablets has a greater volume

In the compound MgCl2, the subscript 2 indicates thata. there are two magnesium ions for each ion of chlorine
b. the chloride ion is twice the size of the magnesium ion.
c. magnesium and chlorine form a double covalent bond.
d. there are two chloride ions for each magnesium ion.

Answers

The correct answer is answer choice D, there are two chloride ions for each magnesium ions. Subscripts always indicate the number of atoms, or ions, present in the molecule. The 2 refers to the element directly to its left, so answer choice A is reversed; there are 2 chloride ions for each magnesium ion, not the other way around. Answer choice B and C are incorrect because the subscript refers to the number of atoms, not the size of the atoms or the type of bond.

Answer:

The chloride ion accepted two electrons from the magnesium ion.

Explanation:

The process of ionic bonding is not the same as the process of metallic bonding. Which of the following statements is trueabout these processes?

1. In ionic bonding, only ions of the same element combine to form a compound.
2. In metallic bonding, valence electrons can move freely between atoms.
3. Substances formed through ionic bonding are not considered compounds.
4. In metallic bonding, electrons are transferred between elements in fixed ratios.

Answers

Answer: In metallic bonding, valence electrons can move freely between atoms

Explanation:

when metals bond to one another, their outermost energy levels overlap. this allows valence electrons to move freely between atoms in what is sometimes called a “sea of electrons

Which of the following is NOT soluble in water? A) NaCl
B) KBr
C) CH3CH2OH
D) HCl
E) C6H6

How is this determined?

Answers

The correct answer is E. C6H6 is not soluble in water. This is determined by the polarities of these substances. Benzene is a non-polar substance because it has equal number of electrons sharing a bond thus it does not dissolve in water which is a polar substance.

all hydroxides are insoluble with the exception of those formed with alkali metal ions and barium.
Hence, CH3CH2OH is insoluble

If the reaction is at dynamic equilibrium at 500 K, which statement applies to the given chemical system?The forward and reverse reactions no longer occur.
The rates of the forward and reverse reactions are unequal.
The concentrations of the products and reactants do not change.
The forward reaction stops at 500 K.

Answers

The correct option is this: THE CONCENTRATION OF THE PRODUCTS AND THE REACTANTS DO NOT CHANGE.

A reversible chemical reaction is said to be in equilibrium if the rate of forward reaction is equal to the rate of backward reaction. At this stage, the concentrations of the products and the reactants remain constant, that is, there is no net change in the concentration even though the reacting species are moving between the forward and the backward reaction.

If the reaction is at dynamic equilibrium at 500 K, the statement that applies to the given chemical system is The concentrations of the products and reactants do not change.

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