ok so i need a reasoning on What evidence have you discovered to explain how the curve of Earth’s surface affects temperatures on Earth?

Answer:

the electron will be drawn more toward the atom with the higher e lectronegativity resulting in a polar covalent bond.

Explanation:

When atoms of different elements share electrons through covalent bonding, the electron will be drawn more toward the atom with the higher e lectronegativity resulting in a polar covalent bond. When compared to ionic compounds, covalent compounds usually have a lower melting and boiling point, and have less of a tendency to dissolve in water.

Answer:

3 significant figures

Explanation:

Thus 2° C, converts to 275 K, which has 3 significant figures. Rounding Error When you do a long series of calculations, try to do them all in one set of operations.

Answer:c

Explanation:c

Answer:

1.5232 × 10^-6 grams

Explanation:

Answer:

x/2

Explanation:

X = 2 molecules of H2

For 2 molecules of H2, there's only 1 molecule of O2. Meaning, there's twice the amount of H2, so O2 = x/2 molecules.

I hope I'm understanding this question right.

The mass of glucose produced from 100.0 g H2O is 166.8 g C6H12O6.

Given:100.0 g CO2 reacts with 100.0 g H2O according to the equation below.

6CO2 + 6H2O → 6O2 + C6H12O6

How many grams of glucose, C6H12O6 form from the 100.0 g H2O

According to the reaction, 6 moles of water react with 6 moles of carbon dioxide to produce one mole of glucose and 6 moles of oxygen.

Balanced Chemical Equation:

6CO2 + 6H2O → 6O2 + C6H12O6

We have given the mass of H2O, so first, we will calculate the number of moles of H2O.

Number of moles of H2O:

Mass of H2O = 100.0 g

Molar mass of H2O = 18 g/mol

Number of moles of H2O = Mass/Molar mass

= 100.0 g/18 g/mol

= 5.56 moles

Now, we know that 6 moles of water react with 1 mole of glucose.

So, the number of moles of glucose produced:Number of moles of glucose:

6 moles H2O → 1 mole glucose5.56 moles H2O → (1/6) x 5.56 = 0.9267 moles glucose

Now we will calculate the mass of glucose from the number of moles of glucose.

Mass of glucose:Number of moles of glucose = 0.9267 moles

Molar mass of glucose = 180.2 g/mol (C6H12O6)

Mass of glucose = number of moles x Molar mass

= 0.9267 moles x 180.2 g/mol

= 166.8 g

Therefore, the mass of glucose produced from 100.0 g H2O is 166.8 g C6H12O6.

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The change to the reactants that would accomplish increase in reaction rate is increase in concentration of reactant.

Reaction rate is the speed at which a chemical reaction proceeds.

It is expressed in terms of either the concentration of a product that is formed in a unit of time or the concentration of a reactant that is consumed in a unit of time.

Here, a student wants to increase the rate of a reaction that involves gases.

The increase in reaction rate will be result of increase in concentration of reactant.

In case of gases, it can be done via:

Increasing the pressure and decreasing the volume.

Hence, the change to the reactants that would accomplish increase in reaction rate is increase in concentration of reactant. Increasing the pressure and decreasing the volume are ways to accomplish this.

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The sublimation of solid carbon(IV) oxide is best classified as a physical change because only dispersion forces between CO₂ molecules are disrupted. That is option A.

Sublimation is defined as the conversion of a substance from the solid to the gaseous state without its becoming liquid.

A Physical change can be defined as the change in form of matter without change in its chemical identity.

The solid carbon dioxide is the same carbon dioxide is still present, it just undergoes a phase change to become a colorless gas.

Therefore, the best statement that can be used to classify the sublimation of carbon dioxide is that it's a physical change.

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Answer:

d=m/

Explanation:

d is density, m is mass, v is volume

Given: m =10.4g, v=12.2mL

substituting in equation,

d=10.4/ 12.2

d=0.8524g/mL

To learn more about density:

The density of the liquid is 0.852 g/mL.

To calculate the density of the liquid, we need to use the formula:

Density = Mass / Volume

Given that the mass of the liquid is 10.4 g and the volume is 12.2 mL, we can substitute these values into the formula:

Density = 10.4 g / 12.2 mL

Simplifying this expression, we find:

Density = 0.852 g/mL

Density is a physical property of a substance and is defined as the amount of mass per unit volume. In this case, the density tells us that for every milliliter of the liquid, there is 0.852 grams of mass. The units of grams per milliliter (g/mL) indicate that the density is a ratio of mass to volume.It is important to note that the density of a substance can vary with temperature, so this value is only valid under the conditions at which the measurement was made. Additionally, the density can provide valuable information about the identity of a substance, as different substances have different densities.

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The word "symptom" refers to a specific manifestation or indication of a condition, disease, or disorder that is experienced or observed by an individual.

Symptoms are subjective or objective changes in the body's normal functioning that may be recognized as abnormal, uncomfortable, or problematic. Symptoms can manifest in various ways depending on the nature of the underlying condition. They can be physical, such as pain, rash, cough, fever, or fatigue, indicating an illness or injury affecting the body. Symptoms can also be psychological, such as anxiety, depression, or confusion, reflecting disturbances in mental health.

Symptoms serve as important clues for medical professionals to identify and diagnose diseases or disorders. They provide valuable information about the nature, severity, and progression of an illness, helping healthcare providers formulate appropriate treatment plans. Additionally, symptoms may also be important for individuals to self-assess their own health status and seek appropriate medical attention.

It is essential to note that symptoms alone may not provide a definitive diagnosis, as they can overlap across different conditions. Further evaluation, including medical tests and examinations, is often necessary to confirm a diagnosis and determine the appropriate course of action.

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Answer:

1.) 0.619 M

2.) 6.34 L

3.) 12.7 moles

Explanation:

Part 1: To find the molarity, you first need to convert grams to moles using the molar mass.

Molar Mass (NaCl): 22.990 g/mol + 35.453 g/mol

Molar Mass (NaCl): 58.443 g/mol

143 grams NaCl               1 mole
-------------------------  x  ------------------------  =  2.45 moles NaCl
                                    58.443 grams

Molarity = moles / volume (L)

Molarity = 2.45 moles / 3.95 L

Molarity = 0.619

Part 2: To find the volume, you need to use the given moles and the previously calculated molarity.

Molarity = moles / volume (L)

0.619 M = 3.93 moles / volume

(0.619 M) x volume = 3.93 moles

volume = 6.34

Part 3: To find the moles, you need to use the given volume and the previously calculated molarity.

Molarity = moles / volume (L)

0.619 M = moles / 20.55 L

12.7 = moles

Answer:

\([CH_3CHO]=0.550M\)

Explanation:

Hello.

In this case, since the rate law for this chemical reaction would be:

\(r=\frac{d[CH_3CHO]}{dt} =-k[CH_3CHO]^2\)

The integrated rate law after its demonstration is:

\(\frac{1}{[CH_3CHO]} =kt+\frac{1}{[CH_3CHO]_0}\)

Thus, for the given rate constant, initial concentration of CH3CHO and elapsed time, the resulting concentration is:

\(\frac{1}{[CH_3CHO]} =6.73x10^{-5}\frac{L}{mol*s}*45.0s +\frac{1}{0.551mol/L}\\\\\frac{1}{[CH_3CHO]}=3.03x10^{-3}L/mol+1.81L/mol\)

\(\frac{1}{[CH_3CHO]} =1.82L/mol\)

\([CH_3CHO]=0.550M\)

Best regards!

Answer:

1.2x1023 molecules

hope this helped!

Explanation:

1227.6

Answer:

c or b

Explanation:

brainiest

Answer:

A) Trypsin has an optimal pH of 8.

B) Pepsin works best at a pH of 3.

D) Pepsin works best in more acidic conditions.

The statements that accurately describe the action of trypsin and pepsin are as follows:

Thus, the correct options for this question are A, B, and D.

Enzymes may be defined as the types of biocatalysts that significantly increase the rate of chemical reactions without being consumed in the overall process. It is thought that all cellular processes and reactions are mediated by enzymes.

Both trypsin and pepsin are the classes of enzymes that effectively catalyze the breakdown of proteins in food into smaller peptide chains or into individual amino acids.

But the mode of action for both enzymes may differ a lot. For example, trypsin work best at a slightly basic condition of pH 8 while pepsin works best in an acidic environment.

Therefore, the correct options for this question are A, B, and D.

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Answer:

1cf gallon=7.481 us liquid gallon

The number of moles of a solute that 3 liters of a 2-molar solution would contain is 6 moles. Details about number of moles can be found below.

The number of moles of a substance can be calculated using the following formula:

Molarity = no of moles ÷ volume

According to this question, there are 3 liters of a 2-molar solution. The number of moles can be calculated as follows:

no of moles = 3L × 2M

no of moles = 6 moles

Therefore, the number of moles of a solute that 3 liters of a 2-molar solution would contain is 6 moles.

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Answer:

ideal gas law. PV=nRT

Explanation:

pressure x volume = #moles x R (constant of 8.31) x temp

Answer:

$195

Explanation:

Step 1: Given data

Step 2: Calculate the total estimated cost for remodelling the interior of an apartment

We will use the following expression.

C = cC × nC + cB × nB + cH × nH

C = $13.69 × 3 + $9.53 × 2 + $135 × 1

C = $195

Answer and Explanation

we are given the combustion reaction between oxygen and butane

the balanced reaction equation is:

2C₄H₁₀ + 13O₂ => 8CO₂ + 10H₂O

from the balance chemical equation, we see that 2 moles of butane react with 13 moles of oxygen.

if we have 5.5 moles of oxygen the we need:

2/13 x 5.5 = 0.85 moles of butane

the grams of carbon dioxide that will be produced if we react 3.5 moles of oxygen can be determined by first looking at the mole ratio from the balanced equation. we see that 13 moles of oxygen produce 8 moles of carbon dioxide

therefor the number of moles of carbon dioxide that will form from 3.5 moles of oxygen will be

8/13 x 3.5 = 2.15 moles

if we have 2.15 moles of carbon dioxide, we can determine the mass using the following reaction equation:

mass = n x m

where n is moles

M is molar mass of carbon dioxide

mass = 2.15moles x 44.01g/mole

= 94.62 grams

94.62 grams of carbon dioxide will be formed

IUPAC name for the compound is 5,6 Dimethyl Heptene.

This refers to a naming based on the highest length of the carbon molecule- chains that are joined by either a single bond, continuous chain, or ring.

In IUPAC naming / Nomenclature, multiple bonds or atoms other than carbon and hydrogen are indicated by suffixes and prefixes with respect to a particular set of priorities.

Alkane= CnH2n+2

Alkene= CnH2n

Alkyne= CnH2n-2

C - Chain =7

H- Chain =14

CH₃ - bond= 2

Therefore,

n= 7

2n=14

It is an alkene hydrocarbon. The methyl group is present at the 5th and 6 chain.

Hence, the IUPAC name of the compound is 5,6 Dimethyl Heptene.

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Answer:

False

Explanation:

Groundwater and surface water have a relationship.

Groundwater is the water that is contained in a subsurface layer of an underlying soil/rock whereas surface water is that found in a lake, river or some other surface cavities.

However, when groundwater is discharged to surface water bodies, it is said to be surface water. Thus the statement asked is false.

Answer:   D

Explanation:

oxygen is in different group with fluorine hence is not the most similar they might have similalities but is not the most similar

The molar mass of the diprotic acid, H₂X is 84.9 g/mol

We'll begin by calculating the number of mole in 13.96 mL of 0.1051 M NaOH. This can be obtained as follow:

Volume = 13.96 mL = 13.96 / 1000 = 0.01396 L

Molarity of NaOH = 0.1051 M

Mole of NaOH =?

Mole = Molarity x Volume

Mole of NaOH = 0.1051 × 0.01396

H₂X + 2NaOH —> Na₂X + 2H₂O

From the balanced equation above,

2 moles of NaOH reacted with 1 mole of H₂X.

Therefore,

0.00147 mole of NaOH will react with = 0.00147 / 2 = 0.000735 mole of H₂X.

Mole of H₂X = 0.000735 mole

Mass of H₂X = 0.0624 g

Molar mass = mass / mole

Molar mass of H₂X = 0.0624 / 0.000735

Thus, the molar mass of the diprotic acid, H₂X is 84.9 g/mol

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Taking into account the definition of Avogadro's number, 0.116 moles of acetic acid are in the sample.

Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.

Then you can apply the following rule of three: if 6.023×10²³ atoms are contained in 1 mole of carbon, then 1.40×10²³ atoms are contained in how many moles of carbon?

amount of moles of carbon= (1.40×10²³ atoms × 1 mole)÷ 6.023×10²³ atoms

amount of moles of carbon= 0.232 moles

So, the amount of moles of carbon in acetic acid that contains 1.40×10²³ carbon atoms is 0.232 moles.

On the other side, the small subscripts placed to the right of some symbol indicate the number of moles of the element that are found in the compound.

So, in pure acetic acid, CH₃COOH, are present 2 moles of carbon in 1 mole of acetic acid.

Then you can apply the following rule of three: if 2 moles of carbon are present in 1 mole of acetic acid, then 0.232 moles of carbon are contained in how many moles of acetic acid?

\(amount of moles of acetic acid=\frac{0.232 moles of carbonx1 mole of acetic acid}{2 moles of carbon}\)

amount of moles of acetic acid= 0.116 moles

In summary, 0.116 moles of acetic acid are in the sample.

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Answer:

that element is likely to be a non metaland a gas

Meniscus. The graduated cylinder is calibrated so that, when viewed at eye level, reading the bottom of the meniscus will produce precise readings.

A popular piece of scientific equipment used to measure the volume of a liquid is a graduated cylinder, sometimes referred to as a measuring cylinder or mixing cylinder. Its form is slender and cylindrical. The measured amount of liquid is shown by each marked line on the graduated cylinder.

An item of laboratory equipment known as a measuring cylinder, graduated cylinder, cylinder measurement, or mixing cylinder is used to measure the number of liquids, chemicals, or solutions during routine lab work. Compared to standard laboratory flasks and beakers, graduated cylinders are more exact and accurate.

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Answer:

The best existing methods of control—artemisinin-based drug treatment and insect control with chemical sprays and treated bednets—can reduce the burden of disease substantially, and can even eliminate the disease in some regions,

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These are reactions that transfer energy to the surroundings (ie the energy exits from the reaction, hence the name exothermic). The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become hotter. A thermometer is used to detect the temperature increase.

Examples:

Combustion

Neutralisation between acids and alkali

These are reactions that take in energy from the surroundings (ie energy enters the reaction, which will help you to remember the name endothermic). The energy is usually transferred as heat energy, causing the reaction mixture and its surroundings to become colder. A thermometer is used to detect the temperature decrease.

Example:

Electrolysis

Explanation:

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