Analysis of a sample of a compound composed of carbon, hydrogen, and oxygen shows that the sample contains 18.80 g of C, 2.367 g of H, and 25.04 g of O. The properties of the compound suggest that the molar mass should be 59.04 g/mol. How many carbon atoms are there in one molecule of the compound

Answer:

a. 1.0 × 10⁻⁶ M (≈ 10⁻⁶ M)

Explanation:

Step 1: Given data

pOH of the solution: 6.0

Step 2: Calculate the concentration of hydroxide ions ([OH⁻]) in the solution

We will use the definition of pOH.

pOH = -log [OH⁻]

[OH⁻] = antilog -pOH

[OH⁻] = antilog -6.0

[OH⁻] = 1.0 × 10⁻⁶ M

Since [OH⁻] > 10⁻⁷ M, we can conclude that the solution is basic.

Answer:

The correct answer is - increase Florida's average income per person.

Explanation:

Kennedy Space Center established by NASA helped the boosting economy of Florida. Spaceport operations in Kennedy Space Center benefit Florida by a total economic impact of nearly $4 billion on Florida's economy.

This space center helped in the 7,639 jobs in 2018 and 2019 and 37 new space operation companies. These jobs increased Florida's average income per person above $91,000.

Answer:

D

Explanation:

because alkanes don't dissolve in water. They are insoluble.

Explanation:

you have to use the formula

number of moles=mass/molar mass

=153/145.5

=1.05g/mol

I hope this helps

Answer:

CARBON 14 INCLUDES:

-six protons

-eight neutrons in the nucleus

CARBON 12 INCLUDES:

-six protons

-Six neutrons

Answer:

It would be conduction.

Answer:

97.8 C

Explanation:

Recall the equation for specific heat:

q = mcΔT

There are several things to know in order to answer this question:

1. Whatever heat energy one object gains is the same as the heat energy the other has lost (conservation of energy).

2. Since one substance loses heat and the other gains heat, you need to multiply one side by -1 to account for the opposite direction of heat transfer.

3. The final temperature of both substance will be the same (zeroth law of thermodynamics)

Below, the left side of the equation represents water and the right side represents zinc.

-1 x 200 x 4.184 x (T - 100) = 60 x 0.389 x (T - 20)

Solve this equation and you get T = 97.8.

Answer:

Draw a structural formula for the organic anion (i.e., do not include NH4 ) formed when propanal is reacted with Tollens reagent. Don't forget the charge on the ion.

Explanation:

Aldehydes on reaction with Tollen's reagent(ammonical silver nitrate solution) form carboxylic acids.

The anion formed is a carboxylate ion.

The entire chemical reaction is shown below:

Answer:

C and D- Ionic bonding

B- Metallic bond

Explanation:

They show ionic bonding through which metals bond.

B shows metallic bonding

Answer:

Most of the scientists worldwide do not accept this theory.

Explanation:

Lamarck's theory states that acquired traits can be passed on from parents to offspring. This theory can not be sufficiently substantiated by indisputable scientific evidences hence it is not accepted by majority of scientists worldwide.

Since science is empirical and the theory is mostly based on vague speculations rather than concrete evidence, it was long rejected by many biologists.

This theory suggests that all life forms will gradually evolve from simple to complex organisms while the simple organisms gradually disappear. This is not the case.

Answer: The molarity of phosphoric acid is 0.05 M

Explanation:

A neutralization reaction is defined as the reaction in which an acid reacts with a base to form a salt and water molecule.

At equivalence, moles of acid becomes equal to the moles of base. The equation for the neutralization follows:

[tex]n_1M_1V_1=n_2M_2V_2[/tex]              ........(1)

where,

[tex]n_1, M_1\text{ and }V_1[/tex] are the n-factor, molarity and volume of acid that is [tex]H_3PO_4[/tex]

[tex]n_2, M_2\text{ and }V_2[/tex] are the n-factor, molarity and volume of the base that is NaOH

Given values:

[tex]n_1=3\\M_1=?M\\V_1=10.00mL\\n_2=1\\M_2=0.1000M\\V_2=15.00mL[/tex]

Plugging values in equation 1:

[tex]3\times M_1\times 10.00=1\times 0.1000\times 15.00\\\\M_1=\frac{1\times 0.1000\times 15.00}{3\times 10.00}\\\\M_1=0.05M[/tex]

Hence, the molarity of phosphoric acid is 0.05 M

Explanation:

Sydney has been the work that is a great place 56 to be able and a day and day for a week or two types and we will have a very nice time of course but 6yy6667 has 7575665yy44y

Answer: The mass of water produced is 180.02 g

Explanation:

The number of moles is defined as the ratio of the mass of a substance to its molar mass.

The equation used is:

[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] ......(1)

Given mass of HF = 600.0 g

Molar mass of HF = 20.01 g/mol

Plugging values in equation 1:

[tex]\text{Moles of HF}=\frac{600.0g}{20.01g/mol}=29.98 mol[/tex]

The given chemical equation follows:

[tex]SiO_2+6HF\rightarrow H_2SiF_6+2H_2O[/tex]

By the stoichiometry of the reaction:

If 6 moles of HF produces 2 moles of water

So, 29.98 moles of HF will produce = [tex]\frac{2}{6}\times 29.98=9.99mol[/tex] of water

Molar mass of water = 18.02 g/mol

Plugging values in equation 1:

[tex]\text{Mass of water}=(9.99mol\times 18.02g/mol)=180.02g[/tex]

Hence, the mass of water produced is 180.02 g

Answer:

The appropriate answer is "342 g/mol".

Explanation:

Given:

Freezing point,

= 0.93°C

Kf,

= 1.86°C/m

Mass,

= 171

As we know,

⇒ [tex]Freezing \ point = Kf\times molality[/tex]

                     [tex]0.93=1.86\times molality[/tex]

             [tex]Molality=\frac{0.93}{1.86}[/tex]

                            [tex]=0.5 \ m[/tex]

Now,

⇒ [tex]Molality=\frac{moles \ of \ sugar}{mass \ of \ water}[/tex]

             [tex]0.5=\frac{moles \ of \ sugar}{0.01}[/tex]

    [tex]moles \ of \ sugar=0.0005 \ mol[/tex]

hence,

The molar mass of the sugar will be:

= [tex]\frac{mass}{moles}[/tex]

= [tex]\frac{171\times 10^{-3}}{0.0005}[/tex]

= [tex]342 \ g/mol[/tex]

Answer:

pCl⁻ = 0.54

Explanation:

First we calculate how many Cl⁻ moles are coming from each substance, using the given volumes and concentrations:

The final volume of the mixture is = 0.10 L + 0.23 L = 0.33 L

Now we calculate [Cl⁻], using the total number of Cl⁻ moles and the final volume:

Finally we calculate the pCl⁻ of the resulting solution:

Answer:

Organ as a group of tissues working together is an organ.

Answer:

10.70grams

Explanation:

Density of a substance = mass/volume

At STP of a gas (standard temperature and pressure), the density of oxygen gas is 1.429 g/L

Hence, according to this question, in 7.49 L of oxygen gas, there would be:

Using D = m/V

1.429 = m/7.49

m = 1.429g/L × 7.49L

m = 10.70g

Answer;

4.29%

Explanation:

molecular weight of Al(NO3)3 is

27+(14+16*3)3=213 amu

total mass of oxygen is 3*3=9 amu

percentage is 9/213*100=4.25%

ig i i i i i i i i i ii i i i i i ii i i i i i

1. Na is metal

Ge is Metalloid

Si is  Metalloid

Br is Nonmetal

Ag is Metal

2. Each element is composed of indestructible particles called atoms.

3. Positive and negative charges attract.

Chemistry is the scientific study of the properties and behavior of matter. It is a natural science that covers the elements that makeup matter to the compounds composed of atoms, molecules, and ions: their composition, structure, properties, behavior, and the changes they undergo during a reaction with other substances.

In the scope of its subject, chemistry occupies an intermediate position between physics and biology.  It is sometimes called the central science because it provides a foundation for understanding both basic and applied scientific disciplines at a fundamental level. For example, chemistry explains aspects of plant growth (botany), the formation of igneous rocks (geology), how atmospheric ozone is formed and how environmental pollutants are degraded (ecology), the properties of the soil on the moon (cosmochemistry), how medications work (pharmacology), and how to collect DNA evidence at a crime scene (forensics).

Chemistry addresses topics such as how atoms and molecules interact via chemical bonds to form new chemical compounds. There are two types of chemical bonds: 1. primary chemical bonds—e.g., covalent bonds, in which atoms share one or more electron(s); ionic bonds, in which an atom donates one or more electrons to another atom to produce ions (cations and anions); metallic bonds—and 2. secondary chemical bonds—e.g., hydrogen bonds; Van der Waals force bonds; ion-ion interaction; ion-dipole interaction.

Learn more about Chemistry

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Answer:

pH = 4.25

Explanation:

A solution composed of a weak acid and its conjugate base is a buffer solution. To calculate the pH of a buffer solution we use the Henderson-Hasselbach equation:

pH = pKa + log ([conjugate base]/[weak acid]

In this case, we have the following data:

[conjugate base] = [sodium benzoate] = 0.230 M

[weak acid] = [benzoic acid] = 0.205 M

The pKa of benzoic acid is 4.2. So, we introduce the data in the equation:

pH = 4.2 + log (0.230 M/0.205 M) = 4.2 + 0.050 = 4.25

The chemical equilibrium is the state at which the rate of reaction is constant. The increase in pressure shifts the reaction towards the product side, as fewer moles of the product are there.

The chemical equilibrium is shifters with the change in the concentration, temperature, pressure, and volume of the reaction.

The increase in the pressure results in more contact between the reactant molecules, as they are more in number and moles in the reaction.

The increased collision of the reactant molecules tried to reach the equilibrium condition, and the increased formation of the product is observed.

Thus, the increase in the pressure shifts the chemical equilibrium towards the product, as there were few moles of the product in the reaction.

Learn more about chemical equilibrium, here:

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Answer:

its C

Explanation:

just took the test

Answer: How much heat it takes to raise the temperature

Explanation:

a pex

Answer:

The correct answer is - C.  Increasing the concentration increases the reaction rate.

Explanation:

In the given question the data with change in different factors affect the rate of reaction differently as it alters the time it takes to complete reaction:

Conditions                            Reaction Time

Original                                  10 seconds

Higher concentration            5 seconds

Higher temperature              5 seconds  

Metal added                           5 seconds

As it is given above, time is decreased in each condition including in the case of increasing the concentration of the reactants which means the rate of reaction increases as well.

Answer:

=  0.238 L

Explanation:

From the given information:

To convert cm³ to L(liter), we utilize the advent of a unit fraction that comprises a liter in the upper part of the fraction(numerator) and a cubic centimeter in the lower part of the fraction(denominator)

Recall that:

1000 cm³ = 1 liter

∴

238.0 cm³ = [tex]\dfrac{238.0 \ cm^3}{1} \times \dfrac{1 \ L}{1000 \ cm^3}[/tex]

=  0.238 L

Answer:

Anions. Some atoms have nearly eight electrons in their valence shell and can gain additional valence electrons until they have an octet. When these atoms gain electrons, they acquire a negative charge because they now possess more electrons than protons. Negatively charged ions are called anions.