The only thing that is not matter is energy.

TRUE

FALSE

Answer:

A substance that cannot be broken down into chemically simpler components is an element.

Aluminum, which is used in soda cans, is an element.

When any chemical equation is not balanced then that is known as skeletal chemical equation. We need to balance it because as we know that mass can neither be created nor be distroyed and also the number of atoms on the reactant side should always be equal to the compounds on the product side .

Answer:

ionic

Explanation:

Since Ca is a metal and O is a non-metal, the bond is ionic.

water is a pure substance

Scatterplot: To visualize the relationship between these two variables, create a scatterplot of the number of beers versus blood alcohol content (BAC).

The next step would be to find the equation of the least-squares regression line, which would give the best prediction of BAC based on the number of beers. A regression analysis software or a statistical formula can be used to calculate the equation.

R-squared is the coefficient of determination, and it measures the strength of the linear relationship between two variables. A strong linear relationship is indicated by a high R-squared value, whereas a weak relationship is indicated by a low R-squared value.

The data analysis demonstrates the relationship between the number of beers and the BAC, as well as the accuracy of the prediction made using the least-squares regression line. The R-squared value provides information on the strength of this relationship, which helps determine the usefulness of using the number of beers to predict BAC.

It's important to note that this analysis should be interpreted with caution, as factors such as body weight, gender, and other individual characteristics can also affect BAC levels.

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In general, melting points decrease down a group and increase across a period.

Melting points are the amount of energies needed to break the bonds so that a solid substance turns into liquid phase. In general melting point decrease down the group because the valence shell keep increasing and the outer electrons do not have a strong bond with the nucleus. And the melting point increases across the period because as the valency increases the bonds become stronger.

The periodic table is classified into groups and periods. The vertical columns are called the groups, while the horizontal rows are the periods.

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Answer:

125g × 1 mol/16 grams = 7.81 × avogadros #

Answer:

39%

Explanation:

The Dry Bulb Temperature (also known as air temperature) is the ambient air temperature.

The Wet Bulb temperature is the temperature of adiabatic saturation.

The relative humidity is the amount of water vapor in the air. The relative humidity can be gotten from the dry bulb and wet bulb temperature. The difference between the wet bulb and dry bulb temperature as well as the dry bulb temperature is used to determine the relative humidity with the help of a Psychrometric Chart

Given that the dry-bulb temperature is 8˚C and the difference between the wet and dry-bulb temperatures is 6˚C. From the chart:

Relative humidity = 39%

Answer:

39% I believe is correct.

Ethanol is produced when ethane and ethene react with water and a catalyst like sulfuric acid. Adding concentrated sulfuric acid to hot ethanol (acts as a catalyst).

To eliminate carbon dioxide and sulphur dioxide that are created as byproducts, the gases are passed through a sodium hydroxide solution. The main product that is gathered over water is ethene. As a result, dehydration of ethanol produces ethene rather than ethane. The names Mattling acid and Oil of Vitriol are other names for sulfuric acid. It is highly caustic and acidic in nature. It dehydrates and oxidises when  present in higher amounts. It is a clear, syrup-like liquid with no colour or smell. A substance having the chemical formula C 2H 6, ethane is an organic chemical.

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Answer:

I think it's a combustion reaction

Explanation:

Answer:

C

Explanation:

Temperature is the amount of energy an object has in it's thermal energy stores

Answer:

protons(positively charged) and the neutrons (no charge)

Explanation:

Answer:

The nucleus of an atom contains protons and neutrons.

The substance will become less energetic at the molecular level and transition from a gas to a liquid.

* The correct decision is for the system's molecular energy to decrease and for the substance to transform from a gas to a liquid.

* Molecular energy decreases when thermal energy is withdrawn from a system.

* Kinetic energy includes thermal energy.

* The energy results in an increase in the molecule's typical speed in a substance.

* The molecular speed slows down when the energy is eliminated, causing a gas to condense into liquids.

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Answer:

The energy contained in its molecules movement and vibration

Explanation:

See above

The question is incomplete, the complete question is:

If a 6.00 g sample of an optically pure compound was dissolved in 40.0 mL of \(CCl_4\) and the observed rotation was +3.30°, measured in a 10.0 cm (1.00 dm) polarimeter tube, how would one determine the specific rotation of the pure compound?

Answer: The specific rotation of the pure compound is \(+22^o\)

Explanation:

To calculate the specific rotation of a pure compound, we use the equation:

\([\alpha]=\frac{\alpha_{\text{observed}}}{C\times l\text{( in dm)}}\)

where,

\([\alpha]\) = specific rotation of a pure compound

\(\alpha_{\text{observed}}\) = observed rotation of the compound = [ex]+3.30^o\)

C = concentration in g/mL = 6.00 g/40 mL = 0.15 g/mL

l = path length = 1.00 dm

Putting values in above equation, we get:

\([\alpha]=\frac{+3.30^o}{0.15\times 1.0}\)

\([\alpha]=+22^o\)

Hence, the specific rotation of the pure compound is \(+22^o\)

Answer:

True.

Explanation:

You didn't provide an answer, but I'm assuming this is a T/F question.

[Mg(HSO4)2] is the formula for magnesium hydrogen sulfate.

Hexamethyldisilazane (HMDS) has been used to mildly produce trimethylsilyl (TMS) ethers from a variety of primary, secondary, and tertiary aliphatic alcohols, aromatic alcohols, and oximes in the presence of magnesium hydrogensulfate [Mg(HSO4)2], a heterogeneous solid acid catalyst.

Additionally, under solvent-free conditions, 14-aryl-14H-dibenzo[a,j]xanthenes and 1,8-dioxo-octahydroxanthene derivatives were produced quickly in the presence of Mg(HSO4)2 in high to exceptional yields.

Some linear and cyclic aromatic acetals have been created using a reusable catalyst made of magnesium hydrogen sulphate in an environment devoid of solvents.

The features of this ecologically friendly method—such as its high product yield, straightforward work-up process, and avoidance of organic solvents—will help it immensely in its role as a green process.

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Answer:

20 atoms

Explanation:

There are 4 in H2O2 because of 2 hydrogens and 2 oxygens.

Then, multiply by 5 because the coefficient is 5, therefore there are 5 H2O2 molecules.

5 x 4 = 20

The total number of atoms in the chemical formula 5H₂O₂ is 20.

The term chemical formula is defined as a way of presenting information about the chemical proportions of atoms that represent a particular chemical compound or molecule, applying chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas.

There are three types of chemical formula that are structural, molecular and empirical chemical formula.

There are four atoms in H₂O₂ because of two atoms of hydrogen and two atoms of oxygen. Then, multiply by five because the coefficient is five, therefore there are 5 H₂O₂ molecules.We get,

= 5 x 4

= 20

Thus, The total number of atoms in the chemical formula 5H₂O₂ is 20.

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Answer:

it's because the liquid in the bottle is supercooled

Answer:

Based on the information that NH3 is a gas and assuming the trend in the graph holds for other gases, we can infer that the solubility of gases in water generally decreases as temperature increases. This is because the graph likely shows the relationship between the solubility of NH3 gas in water and temperature. As the temperature increases, the solubility of NH3 gas in water decreases, indicating that NH3 molecules are less likely to dissolve in water as the temperature rises. This trend is generally observed for most gases, as an increase in temperature usually leads to a decrease in the solubility of gases in water. However, it's important to note that the solubility of gases in water also depends on other factors, such as pressure and the nature of the gas and solvent, so the trend observed in the graph may not apply universally to all gases.

Explanation:

Answer:

2 L is the new volume

Explanation:

We can apply the Ideal Gases Law to solve the problem.

At STP, we kwow that 1 mol of gas occupy a volume of 22.4 L

Then, how many moles do we have in 1 L?

Let's do it by a rule of three:

(1L . 1 mol) / 22.4L = 0.0446 moles

These moles are at 1 atm and 273 K of temperature, so let's change our conditions.

P . V = n . R .T

1 atm . V = 0.0446 mol . 0.082 L.atm/mol K . 546 K

V = 2 L

If we pay attention, we can notice that, if we double temperature, we double the volume.

A gas occupies 1.0 L at STP. If the temperature is raised to 546 K, the volume increases to 2.0 L.

The volume of a sample of a gas is 1.0 L (V₁) at standard temperature (T₁ = 273.15 K) and standard pressure (1 atm).

If the pressure remains constant and the temperature is raised to 546 K (T₂), we can calculate the new volume (V₂) using Charles' law.

\(\frac{V_1}{T_1} = \frac{V_2}{T_2} \\\\V_2 = \frac{V_1 \times T_2 }{T_1} = \frac{1.0 L \times 546K }{273.15K} = 2.0 L\)

A gas occupies 1.0 L at STP. If the temperature is raised to 546 K, the volume increases to 2.0 L.

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Answer:

coefficients: 4, 3, 2

Explanation:

The molarity of a solution formed when you add 200 mL of water to 50 mL of 5. 0 M HCl is 1.25M.

The molarity of a solution can be calculated using the following formula:

M1V1 = M2V2

Where;

M1 × 200 = 50 × 5

200M1 = 250

M1 = 250/200

M1 = 1.25M

Therefore, the molarity of a solution formed when you add 200 mL of water to 50 mL of 5. 0 M HCl is 1.25M.

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The limiting reactant in this reaction is hydrogen gas.2 g of hydrogen  gas will produce about 254 of HI. Then, 13.4 g will produce 1702 g of HI.

A limiting reactant in a reaction is the reactant which is fewer in amount or consume early without complete reaction with other reactants. Hence, as soon as this reactant is consume, the reaction stops.

The given reaction of the formation of HI can be written as follows:

H₂ + I₂ → 2HI

Atomic mass of H= 1 g/mol

molecular mass of H₂ = 2g/mol

As per the balanced chemical equation of the reaction, one mole or 2 g of hydrogen gas produce 2 moles of hydrogen iodide.

molar mass of HI = 127 g/mol

mass of 2 moles = 127 × 2 = 254 g.

2 of hydrogen produces 254 g HI. Then , 13.4 g of H₂ produces :

(254 × 13.4) /2 = 1702 g of HI

Therefore, 13.4 g of H₂ produce 1702 g of HI.

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Given, the amount of dextromethorphan HBr present in the cough syrup is 0.09 g per fluidounce.

To find the amount of mL of this agent presents in each teaspoonful dose, we will convert fluidounce to mL.

Let's begin with the conversion,1 fluidounce = 29.5735 mLTo find the amount of mL of dextromethorphan HBr present in each teaspoonful dose,

we will use the formula, Amount of mL of this agent = (Amount of dextromethorphan HBr * Volume of fluidounce) / Total volume= (0.09 * 29.5735) / 1 = 2.6626 mL.

Hence, the amount of mL of dextromethorphan HBr present in each teaspoonful dose is 2.6626 mL.

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The Aldol condensation between benzaldehyde and cyclopentanone proceeds more slowly compared to the reactions between benzaldehyde and acetone, and benzaldehyde and cyclohexanone.

The Aldol condensation reaction between benzaldehyde and cyclopentanone proceeds more slowly than the reactions between benzaldehyde and acetone and between benzaldehyde and cyclohexanone because of steric hindrance.

Cyclopentanone has a smaller ring size compared to cyclohexanone, which makes it more crowded around the carbonyl group. This steric hindrance makes it more difficult for the nucleophilic enolate ion to attack the electrophilic carbonyl carbon in benzaldehyde. Therefore, the reaction proceeds more slowly.

Additionally, acetone does not have the steric hindrance present in cyclopentanone, which makes it more reactive towards benzaldehyde.

This slower rate can be attributed to the increased steric hindrance in cyclopentanone due to its smaller ring size compared to acetone and cyclohexanone. The greater steric hindrance makes it more difficult for the reactants to approach each other, resulting in a slower reaction rate.

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