Explain why is sodium less reactive than potassium

The amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.

To find the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C, we can use the equation Q = mcAT.
First, we need to find the value of m, which is the mass of the water in grams. In this case, it is given as 200 grams.
Next, we need to find the value of AT, which is the change in temperature in degrees Celsius.

This can be calculated by subtracting the initial temperature from the final temperature, which gives us 60 C - 20 C = 40 C.
The specific heat capacity of water, C, is given as 4.18 Joules per gram per degree Celsius.
Now we can plug in the values into the equation:
Q = mcAT
Q = (200 g) x (4.18 J/g°C) x (40°C)
Q = 33,440 J
Therefore, the amount of heat energy absorbed when 200 grams of water are heated from 20 C to 60 C is 33,440 Joules.

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The volume of 0.100M NaCl that would be required to make a 0.0350M solution of NaCl when diluted to 150.0mL with water is 52.5mL.

The volume of a diluted solution can be calculated using the following formula;

CaVa = CbVb

Where;

According to this question, 0.100M NaCl would be required to make a 0.0350M solution of NaCl when diluted to 150.0mL with water. The volume can be calculated as follows:

0.1 × Va = 0.0350 × 150

0.1Va = 5.25

Va = 52.5mL

Therefore, 52.5mL is the volume required to dilute the sodium chloride solution.

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As combustion always result into the formation of water, the other type of reactions that may result into formation of water are Acid-Base Neutralization Reactions and Hydrogen and Oxygen Reaction.

Acid-Base Neutralization Reactions:

A neutralisation reaction is a chemical process in which an acid and a base combine to produce salt and water as the end products.

H⁺ ions and OH⁻ ions combine to generate water during a neutralisation reaction. Acid-base neutralisation is the most common type of neutralisation reaction.

Example: Formation of Sodium Chloride (Common Salt):

HCl + NaOH → NaCl + H₂O

Hydrogen and Oxygen Reaction:

Water vapour is created when hydrogen gas (H₂) and oxygen gas (O₂) are combined directly. This reaction produces a lot of heat and releases a lot of energy.

Example: 2 H₂ + O₂ → 2 H₂O

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If an equation includes 7(CrO₄)₂, the numbers of Cr's and O's atoms that are there are 14 and 56 respectively.

The number of atoms present in a chemical compound can be calculated by multiplying the subscript of the particular element by any coefficient.

According to this question, 7 moles of chromate with the chemical formula; (CrO₄)₂ is given. The number of oxygen and chromium atoms in this compound can be calculated as follows:

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We see the order with respect to crystal violet (m),but no longer the order with respect to hydroxide (n).

Generally the equation for the chemical reaction is mathematically given as

(CV)+(aq) + (OH)-(aq) ------------>. CVOH​​​(aq)

The rate law for the chemical reaction is given as

Rate = k[CV+]m[OH​​​​​-]n,

Because the hydroxide ion conc is an extra of thousand times as massive as the conc of crystal violet, [OH–] will now not exchange drastically all through this experiment.

Therefore, you will find the order with respect to crystal violet (m),but no longer the order with admire to hydroxide (n).

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Answer:

number 3

Explanation:

In isotopes the number of protons and electrons is always the same since they are isotopes of the same element. If the number of protons in atom "a" is different than in atom "b" then these are 2 different elements.

Isotopes have the same number of electrons and protons but a different number if neutrons.

The reaction order and specific reaction rate constant can be determined by performing the kinetics experiment on irreversible polymerization A. Kinetic experiments can be used to investigate the rate and mechanism of chemical reactions. Chemical kinetics is the study of chemical reactions' speed and pathway.

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Answer:

B. Conductor

Explanation:

In chemistry, the actual yield refers to the quantity of a product that is obtained during an experiment or a chemical reaction. The theoretical yield, on the other hand, refers to the maximum amount of product that can be obtained from a given amount of reactant, assuming the reaction proceeds to completion and there are no losses due to factors such as side reactions or incomplete conversion of reactants.

The percentage yield is the ratio of the actual yield to the theoretical yield, expressed as a percentage.

For example, consider the combustion of 10.0 grams of methane gas (\(CH_4\)) in excess oxygen to produce carbon dioxide \((CO_2\)) and water (\(H_2O\)):

\(CH_4\) + 2O2 → \(CO_2\) + \(2H_2O\)

The balanced chemical equation shows that one mole of CH4 reacts with two moles of O2 to produce one mole of CO2 and two moles of \(H_2O\). Therefore, the theoretical yield of CO2 is calculated as follows:

10.0 g \(CH_4\) × (1 mol \(CH_4\)/16.0 g \(CH_4\)) × (1 mol \(CO_2\)/1 mol CH4) × (44.0 g \(CO_2\)/1 mol\(CO_2\)) = 27.5 g \(CO_2\)

If the actual yield of \(CO_2\) obtained from the reaction is 23.5 g, the percentage yield can be calculated as follows:

Percentage yield = (23.5 g CO2/27.5 g CO2) × 100% = 85.5%

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Answer:

0.43 M

Explanation:

The equation that should be used in this case would be:
pOH = pKb + log([A+]/[Base])
pKb = -log (4.6*10^-4) = 3.34
pOH = 14-10.2 = 3.8
[Base] = 0.15
3.8 = 3.34 + log x/0.15
0.46=log x/0.15
10^(0.46) = x/.15
x = 10^(0.46)  * 0.15 = 0.43 M

Answer:

plants can be used as fuel because plants can be burned so they compose the plants to make a liquid

The net ionic equation for the reaction between potassium sulfide and magnesium iodide is S2- + Mg2+ -> MgS, as the potassium and iodide ions are spectator ions and do not participate in the reaction.

To determine the net ionic equation for the reaction between potassium sulfide (K2S) and magnesium iodide (MgI2), we first need to identify the ions present in each compound and then determine the products formed when they react.

Potassium sulfide (K2S) dissociates into two potassium ions (K+) and one sulfide ion (S2-):

K2S -> 2K+ + S2-

Magnesium iodide (MgI2) dissociates into one magnesium ion (Mg2+) and two iodide ions (I-):

MgI2 -> Mg2+ + 2I-

Now, we need to determine the possible products when these ions combine. Since potassium (K+) has a +1 charge and iodide (I-) has a -1 charge, they can combine to form potassium iodide (KI):

K+ + I- -> KI

Similarly, magnesium (Mg2+) and sulfide (S2-) can combine to form magnesium sulfide (MgS):

Mg2+ + S2- -> MgS

Now, we can write the complete ionic equation by representing all the ions present before and after the reaction:

2K+ + S2- + Mg2+ + 2I- -> 2KI + MgS

To obtain the net ionic equation, we remove the spectator ions, which are the ions that appear on both sides of the equation and do not participate in the actual reaction. In this case, the spectator ions are the potassium ions (K+) and the iodide ions (I-).

Thus, the net ionic equation for the reaction between potassium sulfide and magnesium iodide is:

S2- + Mg2+ -> MgS

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Answer:

C

Explanation:

add them together and multiply by 2

Answer:

A. Energy can be made in factories

Explanation:

Took the quiz

Hope this helps

Answer:

In addition to aluminium, the main materials in duralumin are copper, manganese and magnesium.

Answer:

The original composition has been varied for particular applications; it may contain about 4 percent copper, 0.5–1 percent manganese, 0.5–1.5 percent magnesium, and, in some formulations, some silicon.

At pOH value  of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

In this question we will apply the formula

      pH +pOH = 14 . . . . . . . . . . . . .(1)

where pH = concentration of [\(H^{+}\) ] ion

pOH = concentration of [\(OH^{-}\) ] ion

As per the question

pOH =6.0

Putting the value of pOH in equation (1) we get the value of pH

              pH + 6.0 =14

             pH = 14 -6.0

             pH  = 8.0

 The value of pH if the pOH value is 6.0 is 8.0

To find the concentration of \(H^{+}\) ion we will use the following formula

This is calculated by the formula

                                 [\(H^{+}\)} = \(10^{-pH}\)

where we will write the values of pH

Hence the concentration of [\(H^{+}\)} ion is \(10^{-8}\)

Therefore at  pOH of 6.0 the pH value of the following solution is 8.0 and the concentration of [\(H^{+}\) ] ion is \(10^{-8}\)

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The complete question is -

What is the pH value and concentration of [\(H^{+}\) ] ion of the following if the pOH value of the solution is 6.0 ?

The mass of Aluminum Sulfate is 5.373 grams if you have \(2.837*10^{26\) atoms of Sulfur .

The molecular formula of Aluminum Sulfate is \(Al_2(SO_4)_3.\) In one molecule of aluminum sulfate, there are 3 sulfur atoms. To calculate the mass of aluminum sulfate, follow the steps below:

Step 1: Calculate the molar mass of aluminum sulfate using the periodic table.Al = 27.0 g/molS = 32.1 g/molO = 16.0 g/mol

(2 × Al) + (3 × S) + (12 × O) = molar mass of \(Al_2(SO_4)_3.\) = 342.2 g/mol

Step 2: Find the number of moles of sulfur in the given number of atoms of sulfur.2\(2.837*10^{26\) atoms of sulfur × 1 mol S/\(6.022 * 10^{23\)atoms S = 0.0470 mol S

Step 3: Use the molar ratio of sulfur to aluminum sulfate to calculate the number of moles of aluminum sulfate.1 mol \(Al_2(SO_4)_3.\) / 3 mol S = 0.333 mol\(Al_2(SO_4)_3.\) per mol S0.0470 mol S × 0.333 mol \(Al_2(SO_4)_3.\)/mol S = 0.0157 mol \(Al_2(SO_4)_3.\)

Step 4: Calculate the mass of aluminum sulfate.0.0157 mol \(Al_2(SO_4)_3.\) × 342.2 g/mol\(Al_2(SO_4)_3.\)= 5.373 g\(Al_2(SO_4)_3.\)

Therefore, the mass of Aluminum Sulfate is 5.373 grams if you have \(2.837*10^{26\) atoms of Sulfur.

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Answer:0.104

Explanation:

Answer:

0.104

Explanation:

convert grams to moles “10.0 x 1/40”

divide moles by the liters 0.25/2.4

answer: 0.104

Answer:

It should be A the gravitational force on the moon is weaker than on Earth

Answer:

Bromohydrin and chlorohydrin are examples of halohydrins (where X = Br or Cl).

To determine which bond between atoms has the greatest polarity we must look at the difference in electronegativities of the elements involved in the bond. The greatest difference in electronegativity will correspond to the most polar bond.

The electronegativities of each element can be found in the periodic table. The difference in electronegativities will be:

We see that the element pair that has the greatest difference in electronegativity is carbon (C) and fluorine (F).

So the bond between atoms that has the greatest polarity is C-F. The answer is the third option. C-F

Answer:

Two of them are solids, one is liquid. Two of them are edible, one is not. One is a mixture, and two are not.

Explanation:

+1

Its chemical formula is S2Cl2. It contains sulfur in its +1 oxidation state.

The solution with correct concentration is -- 4 m: One kilogram of water contains 4 moles of H₂SO₄ (molality )

In chemistry, the abundance of a component divided by the total volume of a mixture is what is meant by the term "concentration." Quantitative descriptions can be broken down into four categories: concentrations of mass, molarity, number, and volume are all measured in these units.

The term "concentration" can be used to describe any combination of chemicals, but solutes and solvents in solutions are the most common examples. There are two types of molar concentration, also known as quantity: osmotic concentration and the standard concentration.

The "total moles of a solute contained in a kilogram of a solvent" is how molality is measured. Molal concentration is another name for molality. It is a measurement of how much solute is in a solution.

Incomplete question :

Match the solution with the correct concentration.

4 m:

4 M:

4 Molal:

4 Molar

1. 4 moles of H₂SO₄ are placed into 1 Liter of water

2. 4 moles of H₂SO₄ are placed into 1 kg of water

3.  a solution concentration where 4 moles of solute are dissolved in 1 kg of solvent

4. a solution concentration where 4 moles of solute are dissolved in 1 Liter of solvent

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Answer:

a. Larger molecular size

b. Ability to react with water

c. Polarity

d. Shorter bond length

Explanation:

Ethene is a larger molecule than oxygen and nitrogen hence it is more soluble than the both other gases .

SO2 dissolves readily in water to yield an acid solution. It is an acid anhydride.

Nitric oxide is a polar compound. It remains very much polar while nitrogen and oxygen are non polar.

Nitrogen is sp hybrized, this leads to a very short bond and does not easily interact with oxygen and nitrogen

Answer:

1H2 + O2 -> 2Н2O.

combination reaction.

Answer:

you need to state the options

The probability that two heterozygous individuals will have a child together with the short earlobes phenotype is 15%.

The likelihood of the genotype and phenotype of the progeny can be calculated using a Punnett square. Let's refer to the long earlobe gene as "L" and the short earlobe allele as "l."

The probability of each genotype is:

LL = 1/4

Ll = 1/2

ll = 1/4

Now we need to take into account the 60% penetrance of the short earlobes genotype. This means that even if an individual has the genotype for short earlobes (ll), they may not actually exhibit the phenotype.

So the probability of having the short earlobes phenotype is:

P(short earlobes phenotype) = P(ll) x 0.6

P(ll) = 1/4

Substituting in:

P(short earlobes phenotype) = (1/4) x 0.6

P(short earlobes phenotype) = 0.15 or 15%

The probability that two heterozygous individuals will have a child together with the short earlobes phenotype is 15%.

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