Which gas can turn blue litmus paper to red?

A. Inert gases
B. Oxygen
C. Nitrogen
D. Carbon Dioxide

And why??? ​

Using smaller pieces of coal and increasing the concentration of oxygen can both increase the rate of the exothermic combustion reaction of coal. The correct answer is d. both (a) and (b) are correct.

When coal is broken down into smaller pieces, it increases the surface area available for the reaction. This allows for more contact between the coal and oxygen, promoting faster and more efficient combustion. The increased surface area facilitates the exposure of more coal particles to the surrounding oxygen, leading to a higher frequency of successful collisions between reactant molecules and an overall increase in the reaction rate. Similarly, increasing the concentration of oxygen provides a higher number of oxygen molecules available for the combustion reaction. This higher concentration promotes more frequent collisions between oxygen and coal particles, resulting in an accelerated reaction rate. Lowering the temperature, as mentioned in option (c), would not increase the rate of the reaction. Generally, increasing the temperature enhances reaction rates for exothermic reactions. Therefore, the correct answer is option d, as both using smaller pieces of coal (increased surface area) and increasing the concentration of oxygen can effectively increase the rate of the exothermic combustion of coal.

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Answer:

The reactants have more heat energy than the products.

Explanation:

The reactants in an exothermic reaction have higher potential heat energy than the products, this is because they release the energy as heat.

Answer:

just took test is the reactants have more heat

Explanation:

Answer:

0.303kg/m

Explanation:

Density=m/v where m is mass

and v is volume

we then convert m in grams to kg

= 34.16/1000

=0.0342kg

converting ml to m

=11.3/100

=0.113m

then density=0.0342/0.113

=0.303kg/m

Answer:

True

Explanation:

Because the sun is a star, all stars eventually explode after a certain amount of time

Answer:

True

Explanation:

The sun will become a red giant and increase in size. During that time, the earth will increase in 1 degree each day making it inhabitable to live

The strongest interparticle force in each particle is as follows:


a. CH3OH: Hydrogen bonding. Hydrogen bonding is a type of intermolecular force that occurs between a hydrogen atom bonded to a highly electronegative atom (such as oxygen) and another electronegative atom.


b. CCl4: London dispersion forces. London dispersion forces are the weakest type of intermolecular force and occur between nonpolar molecules, such as CCl4.


c. Cl2: London dispersion forces. Like CCl4, Cl2 is a nonpolar molecule and therefore experiences London dispersion forces as the strongest interparticle force.


In summary, the strongest interparticle force in CH3OH is hydrogen bonding, while the strongest interparticle force in CCl4 and Cl2 is London dispersion forces.

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With respect to bonding and electrical conductivity, respectively, sulfur hexafluoride, sf6(g), would be described as "covalent and a nonconductor" because sulfur hexafluoride would be a covalent compound since neither fluorine nor sulfur are metallic elements and aqueous solutions containing covalent bonding do not conduct electricity.

The ability of an electrical charges or heat to move through a material is measured by its conductivity. A material is considered a conductor if it offers relatively minimal resistance to the transfer of thermal or electric energy.

The electricity is conducted by-

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To calculate the heat required to melt 37.4 g of ice at 0°C, we can use the equation Q = m * ΔH, where Q represents the heat, m is the mass, and ΔH is the heat of fusion for ice.

The equation Q = m * ΔH relates the heat (Q) required to melt a substance, the mass (m) of the substance, and the heat of fusion (ΔH), which is the amount of energy needed to convert a substance from solid to liquid at its melting point. For ice, the heat of fusion is typically 334 J/g.

To calculate the heat required, we need to convert the mass of ice to grams. Next, we multiply the mass (37.4 g) by the heat of fusion (334 J/g) to find the heat required in joules. To convert this value to kilojoules, we divide by 1000, since there are 1000 joules in a kilojoule. Therefore, the heat required to melt 37.4 g of ice at 0°C is calculated as (37.4 g) * (334 J/g) / 1000 = 12.5 kJ.

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Answer:

Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site.

Explanation:

Answer:

Budding is a type of asexual reproduction in which a new organism develops from an outgrowth or bud due to cell division at one particular site.

Explanation:

The term symbol for the ground state of helium is \(^1s (0)\).

The term symbol for the ground state of the helium (He) atom is \(^1s (0)\). The term symbol represents the electronic configuration of an atom's ground state, providing information about the total angular momentum quantum number (s, p, d, etc.) and the spin quantum number (1/2 or -1/2).

In the case of helium, the ground state electronic configuration is \(1s^2\), meaning it has two electrons in the 1s orbital. Since the orbital angular momentum quantum number (L) for the 1s orbital is 0, the total angular momentum quantum number (J) is also 0.

The superscript 1 represents the multiplicity, indicating that the term is a singlet state with a total spin quantum number (S) of 0. The subscript S (0) signifies that the term has no orbital angular momentum.

Therefore, the term symbol for the ground state of helium is \(^1s (0).\)

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In order to determine the element being oxidized in the redox reaction, we need the complete balanced equation for the reaction.

The given information "C3H8O2 + KMnO4" is not a balanced equation and lacks the products and reaction conditions.

To identify the element being oxidized, we need to compare the oxidation states of the elements before and after the reaction. In a redox reaction, oxidation involves an increase in oxidation state, while reduction involves a decrease in oxidation state.

Please provide the complete balanced equation for the reaction, including the products and any other relevant information, so I can assist you in determining the element being oxidized.

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The electrical potential of K+ is -98.88 mV if K (outside) / K (inside) = 4.65 / 155mM and the resting potential inside the cell is -90mV; and the K+ ion will flow out of the cell.

The electrical potential is the amount of work required to move a unit of charge from one location to another, separated by a distance, and affected by the electrical field. Electrical potential can be defined as the potential energy per unit charge; the more charge that moves through the potential, the greater the potential difference. The unit for electrical potential is volts (V).

Potential Difference (V) is calculated using the following equation:ΔV = (Vm)in – (Vm) outwhere ΔV is the potential difference across the membrane; (Vm)in is the potential inside the membrane; and (Vm) out is the potential outside the membrane. Electrical potential of K+Electrical potential of K+ is calculated using the Nernst equation:

EK = (RT/zF) × ln ([K]out/[K]in)EK = electrical potential of K+;

R = universal gas constant = 8.314 J/(mol.K);T = temperature = 37 °C = 310.15 K; z = charge of ion; F = Faraday's constant = 96500 C/mol; [K]out = concentration of K+ outside the cell;[K]in = concentration of K+ inside the cell. Substituting all the values in the above formula, we get;EK = (8.314 × 310.15) / (1 × 96500) × ln(4.65/155)EK = -98.88 mV Thus, the electrical potential of K+ is -98.88 mV.

Determine the direction of K+ flow in / out / equilibrium K+ will flow out of the cell. The reason is that the concentration gradient favors the outward flow of K+ ions. K+ is at a higher concentration inside the cell and a lower concentration outside the cell; hence, the ion will flow out of the cell.

The concentration of K+ inside the cell is 155 mM, and the concentration of K+ outside the cell is 4.65 mM; thus, the concentration gradient is favorable for the outward movement of K+ ions.

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The odd one among the options listed is golf because it is not an element (option D).

Chemical elements in chemistry are one of the simplest chemical substances that cannot be decomposed in a chemical reaction.

Chemical elements consist of atoms which have the same number of protons. The chemical elements are arranged on the periodic table in accordance with their atomic numbers.

There are a total number of 118 chemical elements in nature. The periodic table uses abbreviated chemical symbols in place of full element names, for example, Copper is symbolized using Cu while pottasium is symbolized using K.

Golf is a ball game played by individuals competing against one another in which the object is to hit a ball into each of a series of (usually 18 or nine) holes in the minimum number of strokes.

Golf is a sport, hence, is the odd one among the other options which are chemical elements.

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\(CH_3CH_2OH\) is a polar compound and has hydrogen bonding. It has a higher boiling point. It will have the lowest vapor pressure among the three compounds.

Vapor pressure is the pressure produced by the vapors of a liquid in a sealed container when the liquid is heated. It is a property of a liquid that describes the tendency of a liquid to evaporate. It is measured in units of pressure, typically in mmHg or torr. The higher the vapor pressure, the more volatile a compound is. So, the decreasing order of vapor pressure for the given compounds is: \(CH_3CH_3 > CH_3CH_2F > CH_3CH_2OH\)

Here, \(CH_3CH_3\) is a non-polar compound while \(CH_3CH_2F\) and \(CH_3CH_2OH\) are polar compounds. The polar compound has hydrogen bonding, which increases the intermolecular forces between molecules. As a result, the polar compound will have a lower vapor pressure than the non-polar compound.

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Answer: 8

Explanation:

Answer:

I think the answer is 4 or 3, it could be 2 as well, I'm not sure.

Explanation:

1. State Newton's Third Law of Motion:

When two bodies interact, they apply forces to one another that are equal in magnitude and opposite in direction. The third law is also known as the law of action and reaction.

2. List three examples:

a. When we jump our legs apply a force to the ground, and the ground applies an equal and opposite reaction and we leave the ground.

b. When we hit the ball with a bat is another example. When the bat hits the ball, the ball goes off the bat with the same force that the bat goes back,

c. When we bounce a ball. A ball is able to bounce because the reaction from the ground. If there was no reaction from the ground, the ball would not bounce. It would stick to the ground.

3. 3. When you hit a ball, the ball hits back with an equal and opposite force.

a. Since the forces are equal and opposite, why does the ball move?

b. Why is it that you do not move as far as the ball?

a. Because the two forces are not applied to the same object. They are two different systems. The ball hits us and makes a force over us. And we hit the ball and produce a force over the ball. But both forces are not applied to the ball, that's why it moves.

b. Because of our weight we are fixed to the ground. We are much heavier than the ball, so our weight is greater than the reaction of the ball.

Answer:

A

Explanation:

Determine the mass number for each of the isotopes, which is obtained by adding the number of protons and the number of neutrons. Hence, isotope A has a mass number of 1, isotope B has a mass number of 2, and isotope C has a mass number of 3. To determine the average atomic mass, we multiply the atomic mass of each isotope by its abundance. Hence, we obtain (0.99985 × 1 amu) + (0.00015 × 2 amu) + (0.00 × 3 amu) = 1.00 amu

Answer:

Explanation:

CH₃COOH(aq) + NaHCO₃(s) -> CO₂(g) + H₂O(l) + Na+(aq) + CH₃COO-(aq)

The equation is already balanced .

In the reaction acetic acid reacts with sodium bicarbonate to produce carbon dioxide gas , water and sodium acetate . Sodium acetate will be in ionic form ie in the form of Na⁺ ( sodium ion ) and CH₃COO ⁻ ion ( acetate ion ) .

This is an acid base neutralisation reaction . one mole of acetic acid reacts with one mole of sodium bicarbonate to produce one mole of carbon dioxide gas , one mole of water and one mole of sodium acetate in ionic form .

545mm Hg in Kilopascals is 72.6607

I hope this helps you. Good luck stay safe, healthy and, happy!<3

Mild steels, commonly referred to as plain carbon steels, have a carbon percentage ranging from 0.05% to 0.3%. The minimum requirement for hardenability for thick sections is that they contain at least 0.10% carbon.

Less than 0.35 percent carbon is present in the majority of steel. Consider that to be 35/100 of 1 percent to put this in perspective. A heat-quench-temper cycle can now be used to harden any steel with a carbon content between 0.35 and 1.86 percent. It has a very small amount of carbon, between 0.05 and 0.15%. It has a hardness of roughly 115 BHN and a tensile strength of 390 N/mm2. Up to 0.30% of carbon can be found in low-carbon steels.Most of this type of steel is flat-rolled, usually in the cold-rolled and annealed condition, items like sheet or strip. These steels may be formed easily because they have very little carbon—typically less than 0.10% C and up to 0.4% Mn.

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Answer:

Molarity (M) = number of moles of solute (n) / volume of solution in liters (V)

Given,

number of moles of solute (n) = 0.50 mol

volume of solution = 875 mL = 875/1000 L = 0.875 L

Molarity (M) = 0.50 mol / 0.875 L = 0.57 M

The chemical formulas cross method worksheet are listed below in the answer.

A chemical formula lists the constituent components of a compound together with how many atoms of each are present in the complex's smallest unit, whether it be a molecule or a formula unit. We can name simple compounds based on their chemical formulas by using the names of the elements and a few simple criteria.

Cations are positive-charged ion particles. Atoms or molecules that are ionic are charged. If an electron or more are lost from a balanced atom, it will change into a positively charged cation. When a balanced atom gains one or more electrons, an anion, a negatively charged atom, forms.

1. Na₂so₄

4.  Kcl,  , , K₃PO₄, KNO₃, K₂SO4

5.  Mg₂Cl₂, Mg₃ (Po₄)₂, Mg₃ (No₂)₂, Mgso₄

6. AlCl₃, AlPo₄, Al (No₃)₃, Al₂(so₄)₃

7. HCl, H₃PO₄, HNO₃, H₂SO₄

8. FeCl₂, Fe(PO₄)₂, Fe(NO₃)₂, FeSo₄

The chemical formulas cross cross method worksheet are listed above.

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Answer: "Dried mineral water" is a bit of a confusing term, because water is a liquid and cannot really be dried in the traditional sense. However, minerals that are dissolved in water can be left behind when the water evaporates or is removed in some way.

If we assume that you are referring to mineral-rich water that has been evaporated or otherwise had the water removed, then the minerals that were dissolved in the water could form a solid residue or deposit. The exact composition of this residue would depend on the specific minerals present in the water.

For example, if the mineral water contained a high concentration of calcium and magnesium, then the residue could potentially be calcium and magnesium carbonate, which is the same mineral that makes up limestone. If the water contained a high concentration of sodium and chloride, then the residue could be salt.

In general, when water containing minerals evaporates or is removed, the minerals can precipitate out of solution and form a solid deposit. The exact composition of this deposit will depend on the specific minerals present in the water.

Answer:

na atom

Explanation:

which is sodium because it has 11protons -10 electrons =+1.Hence the valency of sodium is 1

Answer:

there are about 26.67 milligrams in 10 mL.

Explanation:

To find the number of milligrams in 10 mL, you can use the proportion:

(8 mg) / (3 mL) = (x mg) / (10 mL)

Where x is the number of milligrams in 10 mL. To solve for x, you can cross-multiply and divide:

(8 mg) * (10 mL) = (3 mL) * (x mg)

x = (8 mg) * (10 mL) / (3 mL)

x = 26.666.. mg

Answer:

influence of a business invironment

NH₄CN is a salt formed from weak base NH₄OH and weak acid HCN so that it undergoes complete hydrolysis

The hydrolysis process is a term used for the reaction of substances with water

There are 3 types of hydrolysis salts

1.Salt from strong acids and strong bases does not undergo hydrolysis so that the pH of the neutral solution = 7

2.Salt from strong acids and weak bases (pH <7) or from strong bases and weak acids (pH> 7) will be partially / partially hydrolyzed

3.Salt from weak acids and weak bases (pH depends on the value of Ka and Kb) will be completely hydrolyzed

NH₄CN is a salt formed from weak base NH₄OH and weak acid HCN so that it undergoes complete hydrolysis

NH₄OH + HCN⇒NH₄CN+H₂O

Can be formulated :

\(\tt [H^+]=\sqrt{\dfrac{Kw\times Ka}{Kb} }\)

Ka> Kb then [H +]> 7 and pH <7 ⇒ acidic

Ka <Kb then [H +] <7 or pH> 7 ⇒alkaline

Ka = Kb then pH = 7 ⇒neutral