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2 years ago

7

Which chemical equation below is balanced correctly? Al4C3 + 12H2O yields 3CH4 + 4Al(OH)3 NaCl + CaO yields Na2O + CaCl2 3LiOH +

Fe(NO3)3 yields 2LiNO3 + Fe(OH)3 Zn + 2HCl yields ZnCl2 + 2H2

1 answer:

Lisa [10]2 years ago

7 0

<span>Al4C3 + 12H2O yields 3CH4 + 4Al(OH)3 is the balanced equation.

Hope this helps!</span>

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According to the periodic table, which of these elements will form an ion with a –2 charge? calcium

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The atom with 69 neutrons and 50 protons has a mass number of

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3 years ago

What is a property in chemistry

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DescriptionA chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity.

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2 years ago

After precipitation falls, the water moves into the lithosphere through

Pie

After precipitation falls, the water moves into the lithosphere through openings in the rock or soil. This process is called percolation.

Therefore, Option C is the correct option.

<h3>What is Evaporation? </h3>

Evaporation is defined as the process of conversion of liquid into vapours.

For example: Conversation of water into water vapours.

But int he question, there is no conversion. So this option is incorrect option.

<h3>What is Sublimation?</h3>

Sublimation is the process of conversion of solid directly into the vapour phase

Since, there is no conversion of of solid into vapours. So, this option also incorrect option.

<h3>What is Mineralization? </h3>

Mineralization is defined as the process through which chemicals which is present in organic matter are decomposed or oxidized easily in the available forms to plants.

As there is no decomposition of minerals. So, this is also incorrect option.

<h3>What is Percolation? </h3>

Percolation is defined as the process in which liquid slowly allow to pass through a filter.

So, this is correct option.

Thus, we concluded that the water moves into the lithosphere through openings in the rock or soil. This process is called percolation.

learn more about Sublimation:

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7 0

1 year ago

PLEASE HELP ME ANSWER THESE QUESTIONS!

madam [21]

Answer:

1. 0.35 moles NaOH

2. $5.10x10^{-4}$ moles $H_2SO_4$

3. 505.4 g Pb

4. 1.46 g HCl (if that is wrong it's 1.5 g HCl due to sig figs)

5. $3.01x10^{23}$ atoms of Ag

6. $2x10^{-10}$ atoms of Cu

Explanation:

1. The mass of NaOH is 40g. 22.99(Na)+16(O)+1.01(H)=40 g

14 g NaOH * $\frac{1 mol NaOH}{40 g NaOH}$ = 0.35 moles of NaOH

2. Mass of $H_{2} SO_{4} = 2(1.01)+32.06+4(16) = 98.08$

0.05 g $H_2SO_4$ × $\frac{1 mol H_2SO_4}{98.08g H_2SO_4} = 5.10 x10^{-4}$

3. mass of Pb = 106.4 g

4.75 moles Pb× $\frac{106.4 g Pb}{1 mol Pb} =505.4 g Pb$

4. mass of HCl = 1.01 +35.45 = 36.36 g

0.04 mol HCl x $\frac{36.46 g HCl}{1 mol HCl} = 1.456 = 1.5$

5. 5.00 mol Ag x $\frac{6.022x10^{23} atoms }{1mol Ag} = 3.01x10^{24} atoms$

6. $3x10^{-10} moles$ Cu x $\frac{6.022x10^{23} atoms}{1 mol Cu} = 1.8668x10^{14}= 2x10^{14}$ atoms of Cu

8 0

1 year ago