What is the [co2 ] in the solution if the absorbance of a sample of the solution is 0. 74? calculate the number of moles of co2 (aq) in the 50. 00 ml solution. Calculate the mass percent of co in the 0. 630 g sample of the ore

Answers

Answer 1

4.48% is the [co₂ ] in the solution if the absorbance of a sample of the solution is 0.74 in compound.

What is compound?

A compound is a substance composed of two or more elements that are chemically combined in fixed proportions. Compounds can be classified as either organic or inorganic, and are typically formed through a chemical reaction between two or more elements.

The absorbance of a sample is a measure of how much light is absorbed by a solution. Since absorbance is a logarithmic scale, a 0.74 absorbance corresponds to a concentration of 0.137M CO₂ (aq).

Moles of CO₂ (aq) in the 50.00 ml solution = 0.137M x 50ml = 6.85 x 10⁻³ mol

Mass percent of CO in the 0.630g sample of the ore = (Number of moles of CO x Atomic Mass of CO) / Mass of the sample x 100

= (6.85 x 10⁻³mol x 28.01g/mol) / 0.630g x 100

= 4.48%

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Related Questions

How many atoms are in 1.22 moles of magnesium?

Answers

Answer:

7.34684 × 10^23 atoms

Explanation:

Well, one mole is basically

6.022 × 10^23 atoms. So 1.22 moles would be

6.022 × 10^23 ⋅ 1.22 atoms.

6.022 × 10^23 ⋅ 1.22 = 7.34684 × 10^23 atoms

The total number of atoms in 1.22 moles of magnesium is 7.34 × 10²³.

One mole of a substance is equal to 6.022 × 10²³ units of that substance (such as atoms, molecules, or ions).The number 6.022 × 10²³ is known as Avogadro's number or Avogadro's constant.

Given:

1.22 moles of magnesium

[tex]1 \text{ mole}= 6.022*10^{23}\text{ atoms}\\\\1.22 \text{ moles}= 1.22*6.022*10^{23}\text{ atoms}\\\\1.22 \text{ moles}=7.34*10^{23}\text{ atoms}[/tex]

So, the total number of atoms in 1.22 moles of magnesium is 7.34 × 10²³.

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Baking soda has a pH of 8. Its a(n) _________ substance
Acid
Neutral
Alkaline
Powdery
(god bless!! have a wonderful and blessed day!!! i love you!! and dont forget no matter what god loves you too!!!

Answers

Answer:

it's an acid

Explanation:

because itis soda

Calculate the number of molecules in 64.5 grams of Nitrogen monoxide, NO

Answers

N=9.933

Explanation:

no of mole = m÷mr

then ,no of molecules=n×la

is there a better way to figure out the ratio of molecule types? What might that be?

Answers

no i don’t think so

describe the three states of matter that are present when snow melts

Answers

Answer:

solid liquid and gas

Explanation:

ice is a solid then it melts to liquid and evaporates into gas

Answer:

Snow is basically water;

ice/snow is solid state

water is liquid state

vapour is gaseous state

Explanation:

Two atoms of Nh3 reacts with one N2 how many moles of Nh3 reacts with one 2.00 mole of N2​

Answers

Explanation:

there are four (4)mole of Nh3 that react with N2

Determine the number of moles in a 100.0g sample of water.

Answers

Answer:

5.55 moles is the answer ....

Explanation:

if 18g H2O is equal to 1 mole then 100 g H2O is how much?

100/18 which is 5.55

Answer:

5.551

Explanation:

100.0g x 1mol H20/18.015g H20 = 5.551 moles of H20

The 18.015g is from the periodic table. H = 1.008x2 = 2.016g H2

0= 15.999

15.999 + 2.016= 18.015

HELP I HAVE 14 MINUTES!!

Which of the following combinations go together to create true statement about subatomic particles?


a - proton

b - neutron

c - electron

d - no charge

e - positive charge

f - negative charge

g - has mass

h - has no mass



Group of answer choices


1) b, d, and h


2) a, e, and h


3) b, d, and g


4) c, d, and h

Answers

3- b, d, and g. a neutron has no charge and has mass.

How do you think the artist creates sculptures that vary in color and intensity?

Answers

Answer:

Light reflected off objects. Color has three main characteristics: hue (red, green, blue, etc.), value (how light or dark it is), and intensity (how bright or dull it is). Colors can be described as warm (red, yellow) or cool (blue, gray), depending on which end of the color spectrum they fall.

Christ Crowned / Honthorst

 

Christ Crowned with Thorns, Gerrit van Honthorst, about 1620

Value describes the brightness of color. Artists use color value to create different moods. Dark colors in a composition suggest a lack of light, as in a night or interior scene. Dark colors can often convey a sense of mystery or foreboding.

Light colors often describe a light source or light reflected within the composition. In this painting, the dark colors suggest a night or interior scene. The artist used light colors to describe the light created by the candle flame.

Annunciation / Bouts

 

The Annunciation, Dieric Bouts, 1450–1455

Intensity describes the purity or strength of a color. Bright colors are undiluted and are often associated with positive energy and heightened emotions. Dull colors have been diluted by mixing with other colors and create a sedate or serious mood. In this image the artist captured both the seriousness and the joy of the scene with the dull gray stone interior and the bright red drapery.

Explanation:

Identify the problem that the cold pack must address

Just need 1-3 sentences

Answers

Answer:

A person's hand holding a cold pack on an ankle ... To determine if a reaction is exothermic or endothermic, you have to compare the ... Well, that also applies to energy of solution problems.

Explanation:

Answer:

To determine if a reaction is exothermic or endothermic, you have to compare

Explanation:

Q1.

How many peaks are there in the 13C NMR spectrum of 1,4-dimethylbenzene?


A: 8

B: 4

C: 3

D: 2

Answers

Answer:

there are four peaks in the 13c NMR (B)

To solve this we must be knowing each and every concept related to NMR. Therefore, the correct option is option B among all the given options.

What is NMR?

NMR spectroscopy is a form of spectroscopy that may be used to evaluate the quality or purity of such a sample as well as the molecular weight of a substance.

It really is based on the observation that now the nuclei among most atoms have spin and that all nucleus are electrically charged. NMR spectroscopy relies on the electromagnetic radiation absorption in the radiofrequency range 3kHz-300 GHz. There are four peaks in the 13C NMR  spectrum of 1,4-dimethylbenzene.

It occurs at such a wavelength that corresponds to radio frequencies, and when an electron recovers from such an excited state back ground state, it produces the same frequency radio wave.

Therefore, the correct option is option B.

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In eukaryotic cells, RNA is transcribed from DNA in the _____

ribosomes

nuclear membrane

cytosol

nucleus

Answers

Answer:

The answer is Nucleolus

30)
Cosmologists believe that the universe is expanding and that it has been expanding since the Big Bang. Astronomers
viewing distant stars see evidence of this expansion in which phenomenon?
A)
Red shift
B)
Blue shift
Gamma pulse
D)
Background radiation

Answers

Answer:

i did this so the next person can have brainliest

Explanation:

What are the 3 Newton laws

Answers

Answer:

The laws are: (1) Every object moves in a straight line unless acted upon by a force.

(2) The acceleration of an object is directly proportional to the net force exerted and inversely proportional to the object's mass.

(3) For every action, there is an equal and opposite reaction.

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this image best explains the 3 laws ..

Thank u ..

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Describe 1 physical property and 1 chemical properties of a metal bicycle

Answers

Answer:

A physical property would be The metal, while a possible chemical property would be a chance of gallium. (Gallium is liquid on hot days)

Explanation:

A 15.0 g piece of graphite is heated to 100.0°C and placed in a calorimeter. The
graphite releases 815.1 J of heat to reach a final temperature of 23.9°C. What is
the specific heat of graphite?

Answers

Answer:

0.714Jg^-10C^-1.

Explanation:

According to specific heat capacity, the specific heat of graphite is -0.714 J/g°C.

What is specific heat capacity?

Specific heat capacity is defined as the amount of energy required to raise the temperature of one gram of substance by one degree Celsius. It has units of calories or joules per gram per degree Celsius.

It varies with temperature and is different for each state of matter. Water in the liquid form has the highest specific heat capacity among all common substances .Specific heat capacity of a substance is infinite as it undergoes phase transition ,it is highest for gases and can rise if the gas is allowed to expand.

It is given by the formula ,

Q=mcΔT

In the given example, it is calculated as, c=Q/mΔT

Substituting values in above equation, c= 815.1/15×(-76.1)

c=-0.714 J/g°C

Thus, the specific heat of graphite is -0.714 J/g°C.

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Which of the following has a negative charge?

neutrons
electrons
nucleus
protons

Answers

Answer:

electrons have a negative charge

Explanation:

Answer:

Electrons

Explanation:

2NaCl → 2Na +Cl2
What reaction is this

Answers

Answer:

Decomposition reaction

Explanation:

A single reactant breaking down to form 2 or more products is decomposition

How are the atomic number and the number of protons related to each other?

Answers

Answer:

Neutral atoms of each element contain an equal number of protons and electrons. The number of protons determines an element's atomic number and is used to distinguish one element from another. ... Together, the number of protons and the number of neutrons determine an element's mass number.

Explanation:

An iron nail that has rusted is an example of a chemical reaction.
True
False

Answers

Answer:

True

Explanation:

Table sugar and salt are examples of? A. mixtures B. elements C. atoms D. compounds

Answers

Answer:

The answer is compound because they consist of multiple things.

D, because the substance contains more than one element

What are the components of the land-based carbon cycle?

Answers

Answer:

Human exhale

Explanation:

When humans exhale-carbon is that which all humans produce=18% of all carbon output

Choose the aqueous solution below with the highest boiling point. These are all solutions of nonvolatile solutes and you should assume ideal van't Hoff factors where applicable.
A) 0.075 m NaI
B) 0.075 m (NH4)3PO4
C) 0.075 m NaBrO4
D) 0.075 m LiCN
E) 0.075 m KNO2

Answers

Answer:

B. (NH₄)₃PO₄

Explanation:

Elevation of boiling point is one of the colligative properties.

Formula is: ΔT = Kb . m . i

ΔT = Boiling T° of solution - Boiling T° of pure solvent.

i = Van't Hoff factor (numbers of ions dissolved)

Kb = Ebulloscopic constant

In this case, all the m are the same so let's dissociate the salts:

NaI → Na⁺  +  I⁻     i = 2

(NH₄)₃PO₄ → 3NH₄⁺  +  PO₄⁻³     i = 4

NaBrO₄  →  Na⁺  +  BrO₄⁻    i = 2

LiCN  →  Li⁺  +  CN⁻         i = 2

KNO2  →  K⁺  +  NO₂⁻        i = 2

The biggest i would have the biggest boiling point, then B is the right answer, ammonium phosphate.

You count the i, with the moles of ions, you dissociate from the salt.

How many orbitals are in the subshell with the following quantum numbers: n=4,l=2,ml=−2,−1,0,1,2?
Select the correct answer below:

A. 1

B. 3

C. 5

D. 7

Answers

The answer is the C.5

In the equation for the orbital radii in hydrogen-like atoms, a0 is called the:
Select the correct answer below:

A. energy level

B. Bohr radius

C. nuclear charge

D. orbital constant

Answers

It’s B - Bohr radius
:)

Do you think a chemical reaction occurs every time two substances are placed together in a reaction vessel?

Answers

Answer:

Not necessarily.

Explanation:

DIS NUTSS NA JK, nooooooo o o o

Most of the mass of an atom is found in

Answers

Answer:

Most of the mass of an atom is found in the nucleus.

Explanation:

Determine whether each change represents oxidation or reduction. 1) CH3CHO to CH3CH2OH 2) CH3OH to CH4 3) N2H4to N2 4) gain of electrons 5) NO-2 to NH3 6) NAD+ to NADH 7) CH4 to Co2 8) Ag+ to Ag

Answers

Answer:

1) oxidation

2) Reduction

3) Oxidation

4) Reduction

5) Reduction

6) Reduction

7) Oxidation

8) Reduction

Explanation:

Oxidation is said to have taken place when there is a positive change in the oxidation number while reduction is said to have taken place when there is a decrease in the oxidation number.

The change from CH3CHO to CH3CH2OH represents on oxidation reaction.

The change from CH3OH to CH4 is a reduction because the oxidation number of carbon changes from +2 to -4.

The change from N2H4to N2 is an oxidation because the oxidation number of nitrogen increases from -2 to 0.

The gain in electrons is a reduction because the gain of electron leads to a decrease in oxidation number.

The change from NO- 2 to NH3 is a reduction because the oxidation number of nitrogen changes from +4 to -3.

The change from NAD+ to NADH is a reduction since NAD+ is the oxidized form of the enzyme while NADH is the reduced form of the enzyme.

The change from CH4 to Co2 is an oxidation because the oxidation number of carbon changes from -4 to + 4.

The change from Ag+ to Ag is a reduction because it involves the gain of one electron and a consequent decrease in oxidation number.

what is a method to isolate insoluble salts after a neutralisation reaction

Answers

Answer:

multiply

Explanation:

multiplacation

84.9 g of solid iron reacts with oxygen gas forming iron(III) oxide. How many moles of oxygen will react

Answers

Answer:

1.14 moles of oxygen will react

Explanation:

The balanced equation of reaction between iron and oxygen is  

4 Fe + 3 O₂  → 2 Fe₂O₃

By stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:

Fe: 4 molesO₂: 3 molesFe₂O₃: 2 moles

The molar mass of iron being Fe 55.85 g/mole, then the following amount of mass reacts by stoichiometry: 4 moles* 55.85 g/mole=223.4 g

You can apply the following rule of three: if by stoichiometry 223.4 grams of Fe react with 3 moles of O₂, 84.9 grams of Fe react with how many moles of O₂?

[tex]moles of O_{2} =\frac{84.9 grams of Fe*3 moles ofO_{2} }{223.4 grams of Fe}[/tex]

moles of O₂= 1.14 moles

1.14 moles of oxygen will react

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