Group 1A element sodium combines with Group 7A element chlorine to form sodium chloride or table salt. Based on this information, which expression is true about the electronegativity values of these two elements? Na > Cl Na < Cl Na = Cl We cannot make a prediction with the data provided. NextReset

Answers

Answer 1

Answer: The answer is Na < Cl

Chlorine is more electronegative than sodium because this follows the trend of the periodic table. The trend states that an element's electronegativity increases from left to right of a period and bottom to up of a group. Since sodium and chlorine are from the same period, and chlorine is at the right of sodium, chlorine is more electronegative.

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At STP, which of these substances is most soluble in H2O?(1) CCl4 (3) HCl
(2) CO2 (4) N2

Answers

The correct answer is option 3. Hydrochloric acid is the most soluble in water at standard temperature and pressure because it is has a polar covalent bond which makes it a polar molecule. Water is also a polar substance therefore hydrochloric acid will really be soluble in water.

Answer: Option (3) is the correct answer.

Explanation:

It is known that like dissolves like that is, a polar solvent will dissolve only polar compounds. Whereas a non-polar solvent will dissolve only non-polar compound.

Substances whose atoms have large difference in electronegativities are polar in nature. Water is a polar solvent and it is able to dissolve polar molecules.

For example, HCl is a polar or ionic compound so it is soluble in water.

On the other hand, $CCl_(4)$ , $CO_(2)$ , and $N_(2)$ are all non-polar as bond between them is formed due to sharing of electrons.

Hence, we can conclude that at STP, HCl is the substance that is most soluble in $H_(2)O$ .

Which type of perspective makes objects look similar to how they look in real life (select the best answer)linear perspective

fractional perspective

isometric perspective

Answers

I believe it's fractional perspective

Answer:

The answer is linear Perspective

Identify which statement is true:A. Isotopes of the same element have the same atomic number and mass number, but a different number of neutrons.
B. Isotopes of the same element have the same mass number and different atomic numbers.
C. Isotopes of the same element have the same number of neutrons and a different number of protons.
D. Isotopes of the same element have the same atomic number and different mass numbers.

Answers

D. Isotopes of the same element have the same atomic number and different mass numbers.

Answer: C. Isotopes of the same element have the same number of neutrons and a different number of protons.

Explanation: Founders Educere answer.

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Give one example each of an aqueous solution of a strong base and an aqueous solution of a weak base

Answers

An example of an aqueous solution of a strong base is NaOH (sodium hydroxide) in water. The NaOH dissociates completely in water into Na+ and OH- ions. An example of an aqueous solution of a weak base is NH3 (ammonia) in water. Here, the NH3 does not completely dissociate because it is a weak base.

Suggest one reason why hydrogen is called a "clean fuel"

Answers

Because there is no carbon, CO2 is not a product of its combustion, only water.

Except for oxygen what is another name for a burning reaction?

Answers

Complete combustion occurs when the break is made carbonic chain and the oxidation of all the carbon atoms of the carbonic chain.

and another name :
In this case, no amount of oxidant, i.e. oxygen enough to burn all the fuel.

hope this helps!

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