CHEMISTRY HIGH SCHOOL

Which among the following will make lime water look milky?Immersive Reader(1 Point)
O₂
CaCO₃
Ca(OH)₂

Answers

Answer 1
Answer:

Which among the following will make lime water look milky

option C) Ca(OH)₂

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How many moles of sulfate ions (SO42−) are present in 1.5 mol of Al2(SO4)3?

Answers

Answer:4.5 moles of sulfate ions are present in 1.5 moles of Al_2(SO_4)_3.

Explanation:

Al_2(SO_4)_3\rightarrow 2Al^(3+)+3SO_(4)^(2-)

1 mol of Al_2(SO_4)_3 gives 3 moles of sulfate ions.

Moles of sulfate ion in 1.5 moles : 1.5* 3=4.5 moles

4.5 moles of sulfate ions are present in 1.5 moles of Al_2(SO_4)_3.

Moles are the fraction of the chemical unit of the atoms, molecules, etc. The moles of sulfate ion present in 1.5 moles of aluminum sulfate is 4.5 moles.

What are moles?

Moles are the ratio of the mass of the substance to that of the molar mass of the substance. Moles are given in mol.

The reaction can be shown as:

\rm Al_(2)(SO_(4))_(3) \rightarrow 2Al^(3+) + 3SO_(4)^(2-)

From the reaction, it can be concluded that 1 mole of aluminum sulfate will give 3 moles of sulfate ions.

The moles of sulfate ions in 1.5 moles of aluminum sulfate will be, 1.5 * 3 = 4.5 \;\rm moles.

Therefore, 4.5 moles of sulfate ions are present in aluminum sulfate.

Learn more about moles here:

brainly.com/question/10782582

The smallest unit into which a compound can be divided and still be that same compound is a(n) ___.

Answers

The molecule of that compound! Hope this helps!

Answer:

The molecule of that compound.

Explanation:

If a sodium atom lost one of its electrons and a chlorine atom gained it, what kind of bond would be formed between sodium and chlorine?a. ionic
b. valence
c. metallic
d. covalent

Answers

This would be an ionic bond.  Ionic bonds form between metals and nonmetals due to the relatively large different in electronegativities where nonmetals are more electronegative than metals.  This difference in electronegativities makes it so that the metal gives up the electron to make an octet and the nonmetal gains the electron to make an octet (there is no sharing of the electron).  The metal becomes a cation while the nonmetal becomes a anion and their opposite electric charges keep them together.

I hope this helps let me know in the comments if anything is unclear.
With no doubt, this type of bond would be ionic.

An ionic bond is when we transfer electrons. This means that the atoms would gain a charge.

Na+Cl- would be the resulting compound because:-

Na (sodium) loses : which means it would GAIN a positive charge.

Cl (chlorine) gains: which means it GAINS a negative charge.

Which of the following leads to a lower rate of diffusion? A. Heated gas
B. Lower molar mass of particles
C. Higher velocity of particles
D. Reduced temperature

Answers

Reduced temperature leads to a lower rate of diffusion. Hence, Option (D) is the correct answer.

What is Diffusiion ?

Diffusion is the net movement of anything generally from a region of higher concentration to a region of lower concentration.

Diffusion is driven by a gradient in Gibbs free energy or chemical potential.

Therefore, Reduced temperature leads to a lower rate of diffusion. Hence, Option (D) is the correct answer.

Learn more about Diffusion here ;

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#SPJ2

Answer:

d

Explanation:

test...

In a chemical equation the arrow (indicating a reaction) points in which direction

Answers

As previously stated, depending on if the reaction is reversible it will point in both left and right directions. If it is irreversible it points to the right.
Depending if the reaction is a reversible or an irreversible one, the direction of the arrow will point in one direction or 2 directions from reactants to products.

How many molecules (not moles) of nh3 are produced from 6.62×10−4 g of h2?

Answers

N₂(g) + 3 H₂(g) = 2 NH₃(g)       molar mass N₂ = 28.0 g/mol
                                                                     NH₃ = 17.0 g/mol

14 g N₂ ---------------> 2 x 17 g NH₃
6.62 x 10⁻⁴ g --------> ?

Mass NH₃ = ( 6.62 x 10⁻⁴ ) x 2 x 17 / 14

Mass NH₃ = 0.022508 / 14

Mass NH₃ = 0.00160 g

number of moles = 0.00160 / 17 =  9.41 x 10⁻⁵ moles

1 mole ----------------------- 6.02 x 10²³ molecules
9.41 x 10⁻⁵ moles ----------  ?

molecules NH₃ =  ( 9.41 x 10⁻⁵ ) x ( 6.02 x 10²³ ) / 1

= 5.66 x 10¹⁹  molecules of NH₃

hope this helps!
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