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2 years ago

The chemical reactions between limestone and acid in the groundwater form. A) geysers B) wetlands C) volcanoes D) sinkholes

Chemistry

2 answers:

Andrej [43]2 years ago

6 0

Answer:

D) sinkholes

Explanation:

Have an awsome possum daaaayyyyyy!

dmitriy555 [2]2 years ago

5 0

Answer:

Sinkholes

Sinkholes often form when acidic groundwater or acid rain dissolves limestone, a porous rock present in the soil, creating voids and cavities.

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If you have a 150-gram sample of CrO3: • How many moles of CrO3 do you have? • How many oxygen atoms do you have? • How many gra

docker41 [41]

Answer :

(a) The moles of $CrO_3$ is, 1.5 moles.

(b) The number of oxygen atoms are, $27.099\times 10^{23}$

(c) The mass of oxygen is, 72 grams.

Explanation : Given,

Mass of $CrO_3$ = 150 g

Molar mass of $CrO_3$ = 100 g/mole

Molar mass of oxygen = 16 g/mole

(a) First we have to calculate the moles of $CrO_3$ .

$\text{Moles of }CrO_3=\frac{\text{Mass of }CrO_3}{\text{Molar mass of }CrO_3}=\frac{150g}{100g/mole}=1.5moles$

The moles of $CrO_3$ is, 1.5 moles.

(b) Now we have to calculate the number of oxygen atoms.

In $CrO_3$ , there are 1 atom of chromium and 3 atoms of oxygen.

According to the mole concept,

1 mole of $CrO_3$ contains $3\times 6.022\times 10^{23}$ number of oxygen atoms.

So, 1.5 mole of $CrO_3$ contains $1.5\times 3\times 6.022\times 10^{23}=27.099\times 10^{23}$ number of oxygen atoms.

The number of oxygen atoms are, $27.099\times 10^{23}$

(c) Now we have to calculate the mass of oxygen.

As, 1 mole of $CrO_3$ contains 3 moles of oxygen

So, 1.5 mole of $CrO_3$ contains $1.5\times 3=4.5$ moles of oxygen

$\text{Mass of oxygen}=\text{Moles of oxygen}\times \text{Molar mass of oxygen}$

$\text{Mass of oxygen}=(4.5mole)\times (16g/mole)=72g$

The mass of oxygen is, 72 grams.

3 0

3 years ago

What is the molar mass of (NH4)2 CO3

pentagon [3]

96.09 g/mol good luck and give thanks:)

7 0

2 years ago

Read 2 more answers

What is the outermost (highest-energy) shell of an element that contains electrons?

DENIUS [597]

Valence shell it contains the valence electrons e.g. the outermost electro

6 0

3 years ago

What is the change in enthalpy when 4.00 mol of sulfur trioxide decomposes to sulfur dioxide and oxygen gas? 250 2(g) + O2(g) ®

lidiya [134]

Answer: A. -396 kJ

Explanation:

The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.

$2SO_2(g)+O_2 (g)\rightarrow 2SO_3(g)$ $\Delta H^0=198kJ$

Reversing the reaction, changes the sign of $\Delta H$

$2SO_3(g)\rightarrow 2SO_2(g)+O_2 (g)$ $\Delta H^0=-198kJ$

On multiplying the reaction by 2, enthalpy gets multiplied by 2:

$4SO_3(g)\rightarrow 4SO_2(g)+2O_2 (g)$ $\Delta H=2\times -198kJ=-396kJ$

Thus the enthalpy change for the reaction $4SO_3(g)\rightarrow 4SO_2(g)+2O_2 (g)$ is -396 kJ.

8 0

3 years ago

A Chemist measured 184 mL using a graduated cylinder. Based on her experience, the volume did not seem to be correct. This volum

salantis [7]

Answer:

Percent error = 20%

Explanation:

The percent error is calculated using the following equation:

Percent error = |(approximate value - exact value)| / (exact value) x 100%

In this problem, the approximate value was 184 mL and the exact value was 230.0 mL

Percent error = |(184 mL - 230.0 mL)| / (230.0 mL) x 100% = 20%

8 0

3 years ago

The chemical reactions between limestone and acid in the groundwater form. A) geysers B) wetlands C) volcanoes D) sinkholes ​

The chemical reactions between limestone and acid in the groundwater form. A) geysers B) wetlands C) volcanoes D) sinkholes