An atom is the simplest substance known and provides the building block from which all matter is composed.
True or false

Answer:

the process of carrying light

Answer:

Uhm if you're failing the class why are you still using brainly to get answers... Where's your momma boy?

Explanation:

It izzz what it izzz

Explanation:

can damage the tissues and organs and further impair oxygenation of blood

The heat of combustion, per mole, of glucose is -2,840 kJ/mol.

The proper equation for the combustion of glucose is shown as follows;

C6H12O6(s) + 6O2(g) → 6CO2(g) + 6H2O(g)

The heat of combustion is the heat released when the substance is burnt under standard conditions.

From the question, the enthalpy of combustion of glucose is -2,840 kJ. Let us recall that the equation shows the heat required to burn 1 mole of glucose. Hence, the heat of combustion, per mole, of glucose is -2,840 kJ/mol.

Learn more about heat of combustion: https://brainly.com/question/6817761

Answer:

A  

Explanation:

EDGE 2022

The product of molar concentration of ion present in chemical reactants raised to the power of number of ions produced per chemical compound in a saturated solution is called: solubility product.

Solubility product can be defined as a product of the molar concentration of ion present in two or more chemical reactants raised to the power of number of ions produced per chemical compound in a saturated solution.

Mathematically, the solubility product is given by this formula:

\(K_{sp} = [A^+]^x[B^{-}]^y\)

Where:

In Chemistry, the solubility product is typically used as an equilibrium constant for the dissolution of a chemical compound in a saturated solution.

Read more on solubility product here: https://brainly.com/question/9905859

The molarity of the solution comes out to be 0.200 M, which is calculated in the below section.

The number of moles of calcium iodide can be calculated as follows-

n = m / M ......(1)

Molar mass (M) of Calcium iodide = 293.887 g/mol

Mass (m) = 58.8 grams

Substitute the known values in equation (1) as follows-

n = 58.8 grams / 293.887 g/mol

   = 0.200 moles

Now, the molarity can be calculated using the below formula-

Molarity = no. of moles / Volume

              = 0.200 moles / 1 L

               = 0.200 M

To learn more about molarity check the link below-

https://brainly.com/question/30404105

#SPJ4

Complete question-

Find the molarity of a solution that contains 58.8 grams of calcium iodide (CaI2), per liter.

Answer:

To calculate the volume we must first find the number of moles

Number of moles (n ) = mass / Molar mass (M)

Since oxygen is diatomic

M of oxygen = 16 × 2 = 32g/mol

n = 16 / 32 = 0.5mol

Next we use the formula

V = n × V(dm³)

where V is the volume

V(dm³) is the volume of 1 mole of a substance at s.t.p which is

22.4dm³

Volume of oxygen gas at s.t.p is

0.5 × 22.4dm³

= 11.20dm³

Hope this helps you

To calculate the concentration of a solution made by diluting 83.0 mL of 5.4 M HBr to a final volume of 750.0 mL, we will use the formula: C1V1 = C2V2. Here, C1 = 5.4 M, V1 = 83.0 mL, V2 = 750.0 mL, and we need to find C2.

When a concentrated solution is diluted, the number of moles of the solute remains constant, as per the law of conservation of mass. This means that the number of moles of the solute present in the concentrated solution is equal to the number of moles of the solute present in the diluted solution. Hence, we can equate the initial and final number of moles of the solute. The initial number of moles of HBr present in the concentrated solution can be calculated using the formula:Initial moles of HBr = Molarity × Initial volume (in liters) = 5.4 M × 0.0830 L = 0.4482 molThe final number of moles of HBr present in the diluted solution can be calculated using the formula:Final moles of HBr = Molarity × Final volume (in liters) = C2 × 0.750 LWe know that the initial and final number of moles of HBr are equal. Hence: Initial moles of HBr = Final moles of HBr⇒ 0.4482 mol = C2 × 0.750 L⇒ C2 = 0.4482 mol / 0.750 L⇒ C2 = 0.60 M

Therefore, the concentration of the solution made by diluting 83.0 mL of 5.4 M HBr to a final volume of 750.0 mL is 0.60 M.

To know more about concentration visit :

https://brainly.com/question/13872928

#SPJ11

Different rock and mineral ,soil profile

The correct positions of the different molecular sizes within the column chromatography are as follows: Small molecules: Start,    Intermediate molecules: Middle, and    Large molecules: End

Chromatography is based on the principle where molecules in mixture applied onto the surface or into the solid, and fluid stationary phase (stable phase) is separating from each other while moving with the aid of a mobile phase.

During the process of column chromatography, the different molecular sizes will settle at different positions. The small molecules are going to travel through the column at a much slower pace than the larger molecules. The three molecular sizes involved in the process of column chromatography are the following:

i) Small molecules

ii) Intermediate molecules

iii) Large molecules

Now, we have to place these molecules in their respective positions. The following is a drag and drop table which shows the positions of each molecule within the chromatography process:

Molecule size                      Position

Small molecule                         Start

Intermediate molecule           Middle

Large molecule                         End

Therefore, the correct positions of the different molecular sizes within the column chromatography are as follows:

Small molecules: Start      Intermediate molecules: Middle      Large molecules: End

To know more about chromatography, visit:

https://brainly.com/question/11960023

#SPJ11

Increasing the surface area of iron and raising the temperature are effective ways to enhance the reaction rate and speed up the conversion of iron into iron(II) bromide.

There are two ways the chemist could speed up the reaction between iron and HBr:

1. Increasing the surface area of iron: Breaking the iron into smaller pieces or using iron filings instead of large chunks increases the exposed surface area of iron. This allows more iron atoms to come into contact with HBr, enhancing the rate of reaction.

2. Increasing the temperature: Raising the temperature increases the kinetic energy of the particles, leading to more frequent and energetic collisions. This can accelerate the reaction rate. By heating the reaction mixture, the chemist can provide the necessary energy for the reaction to occur more quickly.

To know more about the iron(II) bromide refer here :

https://brainly.com/question/30245191#

#SPJ11

The condensed structural formula for the product of the hydrogenation of 2-butene using a platinum catalyst  CH3 – CH2 – CH2 – CH3

What is hydrogenation of alkene ?

Molecular hydrogen (H2) and another substance or element undergo a chemical reaction known as hydrogenation, typically in the presence of a catalyst such as nickel, palladium, or platinum. The method is frequently used to saturate or decrease organic molecules.

In order to give shortenings a hard firmness and plasticity, hydrogenation is the process of saturating certain double bonds and converting others to trans configuration. This enables the formation of solid and semi-solid fats.

To know about hydrogenation of alkene from the link

https://brainly.com/question/13910028

#SPJ4

21.97 mL (volume) of a 0.156 M Ba(OH)2 solution is needed to completely react with 40.3 mL of a 0.170 M HCl solution.

To find the volume of a 0.156 M Ba(OH)2 solution needed to completely react with 40.3 mL of a 0.170 M HCl solution, we need to use the stoichiometry of the reaction and the concept of molarity.

The balanced chemical equation for the reaction between Ba(OH)2 and HCl is:
Ba(OH)2 + 2HCl → BaCl2 + 2H2O

From the balanced equation, we can see that 1 mole of Ba(OH)2 reacts with 2 moles of HCl.

Now, let's use the given information to find the volume of the Ba(OH)2 solution required:

1. Calculate the moles of HCl:
moles of HCl = (volume of HCl) × (molarity of HCl) = (40.3 mL) × (0.170 M) = 6.851 moles HCl

2. Determine the moles of Ba(OH)2 needed:
moles of Ba(OH)2 = (moles of HCl) / 2 = 6.851 moles / 2 = 3.4255 moles Ba(OH)2

3. Calculate the volume of the Ba(OH)2 solution:
volume of Ba(OH)2 = (moles of Ba(OH)2) / (molarity of Ba(OH)2) = (3.4255 moles) / (0.156 M) = 21.97 mL

So, 21.97 mL of a 0.156 M Ba(OH)2 solution is needed to completely react with 40.3 mL of a 0.170 M HCl solution.

To view more reactions involving Ba(OH)2 and HCl visit: https://brainly.com/question/19813342

#SPJ11

we need 22.01 mL of a 0.156 M Ba(OH)₂ solution to completely react with 40.3 mL of a 0.170 M HCl solution.

To solve this problem, we can use the balanced chemical equation for the reaction between Ba(OH₂) and HCl:

Ba(OH)₂ + 2 HCl → 2 H₂O + BaCl₂

From the equation, we can see that one mole of Ba(OH)₂ reacts with two moles of HCl. Therefore, we need to calculate the number of moles of HCl in 40.3 mL of a 0.170 M solution:

moles of HCl = (0.170 mol/L) x (40.3 mL / 1000 mL/mL) = 0.006861 mol

Since two moles of HCl react with one mole of Ba(OH)₂, we need half as many moles of Ba(OH)₂:

moles of Ba(OH)₂= 0.006861 mol / 2 = 0.003431 mol

Finally, we can use the molarity and the number of moles to calculate the volume of Ba(OH)₂ solution needed:

0.156 mol/L = 0.003431 mol / V mL

V mL = 0.003431 mol / 0.156 mol/L = 22.01 mL

Learn more about solution  here:

https://brainly.com/question/30665317

#SPJ11

A line-angle structure of terephthalic acid does not show a ring with six vertices and alternating single and double bonds. The given statement is false

Terephthalic acid, with the chemical formula C₈H₆O₄, is a compound that consists of a benzene ring with two carboxylic acid groups (-COOH) attached to it. It does not have alternating single and double bonds in the ring structure. The correct representation of terephthalic acid would show a benzene ring with two -COOH groups attached to it.

Hence, the given statement a line-angle structure of terephthalic acid shows a ring with six vertices and alternating single and double bonds is false.

Learn more about terephthalic acid  here:

https://brainly.com/question/13487428

#SPJ 4

1. Double-Replacement reactions

2. Decomposition  

3. Combustion

4. Syntesis

5. Single replacement

Given

Chemical equations

Required

Type of reaction

Solution

1. 2AgNO₃ + MgCl₂ ⇒ 2AgCl + Mg(NO₃)₂

Double-Replacement reactions. Happens if there is an ion exchange between two ion compounds in the reactant

2. 2KBr⇒2K +Br₂

Decomposition  

Single compound breaks down in to 2 or more products

3. C₃H₈ + 5O₂ ⇒ 4H₂O + 3CO₂

Combustion

Hydrocarbon and Oxygen reaction and form water and carbon dioxide

4. NaO + H₂O ⇒ NaOH

Syntesis

2 or more reactants combine to form a single product

5. Zn + CuCl₂ ⇒ZnCl₂ + Cu

Single replacement

One element replaces another element from a compound

Answer:

Its C) 2,8,8,4

Explanation:

Answer:

Explanation:

Here, we want to check if the equation of the reaction is balanced or not

Now, for a balanced equation of reaction, the number of atoms of the individual elements on both sides of the equation is equal

Now, let us check the atoms:

We have 1 Sr on both sides

We have 1 SO4 on both sides

We have 1 Mg on both sides

We have 2 OH on both sides

From what we can see, the equation of the reaction is balanced

Thus, the correct answer choice is B

One mole of each element contains Avogadro's number of atoms, which is 6.022 x 10^23 atoms. Therefore, all three substances have the same number of atoms, which is 6.022 x 10^23 atoms.

Answer:

coefficient green : 2.4865

exponent (yellow) : 16

Explanation:

Answer:

200grams

Explanation:

The balanced chemical equation for this reaction is given as follows:

H2(g)+F2(g) → 2HF(g)

This equation shows that it takes 1 mol of both hydrogen gas (H2) and fluorine gas (F2) to produce 2 moles of hydrogen fluoride (HF)

Hence, 5 moles of fluorine gas (F2) will produce 5 × 2 = 10 moles of HF.

In order to convert the mole value of HF to gram value, we use the following formula;

Mole = mass/molar mass

Molar mass of HF = 1 + 19 = 20g/mol

mass = mole × molar mass

mass = 10 × 20

mass = 200grams of HF.

Answer:

Matter is never created or destroyed

1/4  temperature must give Mass of nitrogen at 0°c heated so that both it volume and pressure will be double.​

To double both the volume and pressure of a given mass of nitrogen at 0°C, we can utilize the combined gas law, which relates the initial and final states of a gas. The combined gas law is expressed as:

(P1 * V1) / T1 = (P2 * V2) / T2

Where P1 and P2 are the initial and final pressures, V1 and V2 are the initial and final volumes, and T1 and T2 are the initial and final temperatures.

Since we want to double both the volume and pressure, we can set P2 = 2P1 and V2 = 2V1. Plugging these values into the combined gas law equation, we get:

(2P1 * 2V1) / T1 = P1 * V1 / T2

Simplifying the equation, we find:

4P1V1 = P1V1 / T2

Cancelling out the common terms, we have:

4 = 1 / T2

Rearranging the equation, we find:

T2 = 1 / 4

Therefore, to double both the volume and pressure of the given mass of nitrogen at 0°C, it must be heated to a temperature of 1/4 or 0.25 times its initial temperature.

Know more about combined gas law here:

https://brainly.com/question/13154969

#SPJ8

Answer:

Explanation:

Scientific theory is an in-depth explanation of the observed phenomenon. A law is a statement about an observed phenomenon or a unifying concept.

The molecular formula of the compound is N2H4

A molecular formula is a concise way of expressing the composition of a molecule, representing the number and type of atoms present in it. It shows the type of elements present in a molecule and the ratio of atoms of each element. The molecular formula is represented as symbols of the constituent elements with subscripts to indicate the number of each type of atom.

No we know that;

[14 + 2(1)]n = 32

n = 32/16

n = 2

The molecular formula of the compound is N2H4

Learn more about molecular formula:https://brainly.com/question/28647690

#SPJ1

Taking into account the reaction stoichiometry, 9 moles of CO₂ and 13.5 grams of H₂O are formed if 4.50 mol of ethane undergo combustion.

In first place, the balanced reaction is:

2 C₂H₆ + 7 O₂  → 4 CO₂ + 6 H₂O

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

The following rule of three can be applied:

moles of CO₂= (4.50 moles of C₂H₆×4 moles of CO₂)÷ 2 moles of C₂H₆

moles of CO₂= 9 moles

moles of H₂O= (4.50 moles of C₂H₆×6 moles of H₂O)÷ 2 moles of C₂H₆

moles of H₂O= 13.5 moles

Finally, 9 moles of CO₂ and 13.5 grams of H₂O are formed.

Learn more about the reaction stoichiometry:

brainly.com/question/24741074

brainly.com/question/24653699

#SPJ1

Answer:

Apparent magnitude

Explanation:

By definition, Apparent magnitude which is usually denoted by "m" is the measure of the brightness of a star or even other astronomical objects that are observed from Earth. Meanwhile the absolute magnitude is defined as the intrinsic luminosity emitted by a star or other astronomical objects.

Thus, apparent magnitude is correct.

Answer:

Make an observation.

Ask a question.

Form a hypothesis, or testable explanation.

Make a prediction based on the hypothesis.

Test the prediction.

Iterate: use the results to make new hypotheses or predictions.

Explanation: the order of the steps and self explanatory from there

The more stable conformation of cis-1,3-dimethyl cyclohexane is acquired when in which two methyl groups are at equatorial positions.

The cis conformation is obtained when two locations have axial existing within it. This axial can be up or down substitution or maybe equatorial substitution. The Trans conformation contrasts with the cis type.

Basically, the stable chair conformation exists usually when the bulky groups are present at equatorial positions within the molecule. It should be noted that there must be minimum electron cloud distortion.

Learn about methyl group at:

brainly.com/question/28723437

#SPJ4