What happens to the half-life of Carbon-14 if the number of C particles in the bucket is increased? what does this teach you about half-life?

A - Half-life is a totally random number
B - Half-life of a Half-life is 12.5%
C - Half-Life is a consistent number
D - Half-life is confusing

Answer:

C

Explanation:

Answer:

The correct option is A

Explanation:

The forces of attraction among the molecules or atoms of a substance are called inter molecular forces.

When two atoms gain temporary dipole and become polar for an instant the inter molecular forces of attraction between then are known as London dispersion forces.

London Dispersion Forces:

It is a type of inter molecular force that occurs when the electrons in two adjacent atoms are displaced in such a way that the atoms get some temporary dipoles, they attract each other through London dispersion forces. These inter molecular forces usually occur between non polar substances.

Answer: B intramolecular force

Explanation:

a) Saloni needs to add water and shake the test tube afterwards test it with litmus paper and the litmus will turn red that will confirm that the gas is acidic.

b) \(\mathrm{C}+\mathrm{O}_{2} \rightarrow \mathrm{CO}_{2}\)

   \($\mathrm{CO}_{2}+\mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{H}_{2} \mathrm{CO}_{3}$\)

A litmus test is a test which is conducted to check the presence of acid and base in a chemical solution . A litmus paper is used which is made from a particular species of lichens. A litmus will turn to blue color when exposed to a base and to red color when exposed to an acid.

In the Given question, Charcoal contains carbon, when it is burned it reacts with oxygen present in the atmosphere to form Carbon dioxide and later when this carbon dioxide reacts with water, it is converted into  carbonic acid gas. The acidic nature of the compound is proved later with the litmus test.

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Explanation:

Number of moles(n)=Number of atoms(N)/Avogadro's constant.

Avogadro's constant=6.02×10²³

so we have

n=9.05×10²³/6.02×10²³

n=1.0503moles.

n=mass/molar mass

1.0503=mass/28

mass=1.0503×28

mass=29.4084g

Answer:

d.

Explanation:

more heat energy

Answer: You can do this by using ph strips. It should determine which is a salt base and an acid!

Answer:

Cr, Chromium

Explanation:

the number of protons tell you what the atomic number is

Answer:

Cannot be measured by pyrometer.

Explanation:

This is because a pyrometer measures temperatures for very hot bodies such as the sun.

Answer:

Clinical

Explanation:

Temperature of boiling water cannot be measured by a Clinical thermometer The reason behind this is that the range of clinical thermometer varies between only 35° C to 42° C.

To calculate the actual yield of magnesium nitrate, you need to know the theoretical yield and then compare it to the actual yield. The theoretical yield is calculated based on the balanced chemical equation for the reaction between magnesium and copper(ii) nitrate. The actual yield is the amount of magnesium nitrate that was actually produced during the reaction.

Magnesium nitrate refers to the inorganic compound with the formula Mg(NO₃)₂ₓ, where x = 6, 2, and 0. These are all white solids. The anhydrous material is hygroscopic, quickly forming hexahydrate when in air. All salts are highly soluble in water and ethanol.

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Answer: Harold car has better mileage

Explanation: US gallon is 3.785 litres and one mile is 1.6 km.

35 · 1.6 km/ 3.785 l = 14.8 km/l

The Harold's car has a fuel efficiency of 35 miles per gallon and has better gas mileage.

The efficiency is defined as the peak level of performance that uses the least amount inputs to achieve the highest amount of output.

Effectiveness is the ability to produce a better result, one that delivers more value or achieves a better outcome.

Efficiency is expressed as

Efficiency = output / input

The mileage of Harold's can be calculated as:

US gallon has 3.785 liters and 1 mile is 1.6 km

Thus  mileage = 35 x 1.6 km / 3.785 l

                       = 14.8 km/l

Mileage of Frank's car = 12 x 1.6 km / 3.785 l

                                     = 5.07 km/l

Thus, the Harold's car has a fuel efficiency of 35 miles per gallon and has better gas mileage.

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The empirical formula of a compound that is 68.42% Cr and 31.58% O will be CrO₂.

To determine the empirical formula, we first need to convert the percentage composition to mass.

For 68.42 g Cr per 100 g of compound, we have:

68.42 g Cr / 51.996 g/mol = 1.307 mol Cr

For 31.58 g O per 100 g of compound, we have:

31.58 g O / 16.00 g/mol = 1.974 mol O

To simplify the mole ratio, we divide both mole numbers by the smaller one:

1.307 mol Cr / 1.307 mol Cr = 1.000 mol Cr

1.974 mol O / 1.307 mol O = 1.509 mol O

So the empirical formula is CrO₂, where the subscripts are the rounded mole ratio.

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--The given question is incorrect, the correct question is

"Determine the empirical formula of a compound that is 68.42% Cr and 31.58% O by mass."--

Answer:

This question is incomplete

Explanation:

This question is incomplete. However, Jet fuels are produced/designed in such a way that they can absorb cold and become as cold as -47 °C; this is because of the cold temperature in which the jet flies. When the fuel absorbs this coldness, the movement of the molecules in the fuel begins to reduce (just like in every other substance undergoing coolness) and keeps reducing as the temperature keeps dropping. Ordinarily, if this temperature reduces to a particular point (freezing point), the movement of the molecules will stop totally leading to the fuel solidifying/freezing (which has happened sometime before the production of more improved fuel with lower temperature that is been used now).

NOTE: There are some perceived spelling errors in the question. For example, it appears the "moluses" is actually "molecules", "befire tge" is "before the" and "tenoerature" is "temperature".

Answer:

B. Took the test lol

Explanation:

hope this helps

Answer:

It has a fixed volume it can also be compressed

Explanation:

1: A gases molecules don't move slow because they are not solid and are not compacted.

Answer:

It can be compressed

Explanation:

The Properties of Gases. Gases have three characteristic properties: (1) they are easy to compress, (2) they expand to fill their containers, and (3) they occupy far more space than the liquids or solids from which they form.

The transcription product of the DNA sequence 5ʹ-TGCCA-3ʹ is mRNA with the sequence 5ʹ-ACGGU-3ʹ.

Transcription is the process by which the genetic information present in DNA is copied into RNA. The transcription process takes place in the nucleus of the cell, and DNA acts as a template for mRNA synthesis. mRNA is synthesized using RNA polymerase enzyme, which catalyzes the formation of mRNA strands with complementary base pairs to the template DNA strand.

The DNA sequence 5ʹ-TGCCA-3ʹ has the following complementary sequence 3ʹ-ACGGT-5ʹ, which is used as a template for mRNA synthesis. The mRNA is synthesized with the following complementary sequence to the template DNA strand: 5ʹ-ACGGU-3ʹ. The base Uracil (U) replaces the Thymine (T) base in RNA, and that's why the mRNA sequence is 5ʹ-ACGGU-3ʹ instead of 5ʹ-ACGGT-3ʹ.

The synthesized mRNA strand is processed further before it moves to the cytoplasm for translation. In processing, a cap structure is added at the 5ʹ end, and a poly(A) tail is added at the 3ʹ end. These modifications protect the mRNA from degradation and help in mRNA stability.

Hence, the transcription product is 5ʹ-ACGGU-3ʹ.

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Answer:

If you change the number of neutrons somehow, nothing will happen because it carry's no charge at all.

Explanation:

The K value of 5.62 x 10-102A may be used to determine the hydroxide concentration of an equilibrium ammonia solution at a concentration of 0.10 molar. The equilibrium constant for the reaction of ammonia with water to produce ammonium and hydroxide ions is known as the K value.

The reaction's equation is as follows: NH3 + H2O -> NH4+ + OH- This equation is used to determine the K value: K = [NH3][NH4+][OH-] The K value may be modified to get the hydroxide concentration .

Since the ammonia concentration is 0.10 molar: [OH-] = K x [NH3] = 5.62 x 10-102A x 0.10 = 3.17 x 10-12 molar As a result, the hydroxide concentration of an equilibrium ammonia solution at 0.10 molar is 3.17 x 10-12 molar.

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Easier and pollutuion are correct answer of this question . Click oil basics and use the information to complete this passage that discusses how plastic production affects society.

What is Pollution?

Pollution, also known as environmental pollution, is the addition of any material (solid, liquid, or gas) or energy (such as heat, sound, or radioactivity) to the environment at a rate greater than it can be dispersed, diluted, decomposed, recycled, or stored in an innocuous form. The three basic sources of pollution—air, water, and land—are frequently categorised according to their effects on the ecosystem. Modern society is also concerned about certain types of pollution, such as plastic, light, and noise pollution. The environment, wildlife, and human health are all routinely negatively impacted by pollution of many forms.

Therefore, pollution can be defined simply as something that contaminates the environment. Pollution is the presence of dangerous compounds in the air, land, and water that can harm both living things and the environment. referring to dangerous substances that are released or brought into the environment, such as hazardous gases, liquids, or other poisonous materials. Pollutants, contaminants, or dangerous chemicals are other factors that contribute to the environment's unsuitability or safety, as are poisonous materials that contaminate the soil and the air. Pollution is another unavoidable side consequence of actions that disturb the ecosystem's biodiversity. Additionally, it jeopardises the environment's ability to endure.

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Answer:

Explanation:

The question requires us to determine a proper equation to calculate the enthalpy change for the following reaction:

Considering the generic reactions and their associated enthalpy change given:

According to Hess' Law, enthalpy is a function of state, which means it does not depend on the path by which reactants are converted to products. Using this definition, we can rearrange the reactions 1 and 2 given (and apply all the changes required to their associated enthalpy change) in order to obtain the required reaction, and then calculate the enthalpy change of the final reaction considering the rearranged enthalpies of reactions 1 and 2.

Our final objective is to obtain a chemical equation that presents 1 mol of reactants A and B on the left side, and 1 mol of product C on the right side.

First, let's guarantee that we will have product C by multiplying reaction 2 by -1:

Next, we need to make sure that

Answer:

3x10^21molecules

Explanation:

convert 0.89g to a mole by finding the molar mass of C7H8N4O2. Divide 0.89 by 180g(molar mass) then multiply it by 6.02x10^23 and it equals 2.9766x10^21 on the calculator and you round to the nearest sig fig.

Given data: A beaker containing 0.5 gm of HCl (mat-1) of a solution having 800 ml of water, mat-1, and 200 ml of sol-1.To explain the given data, first, we need to understand the meaning of the terms used in the question:Beaker: A container used for holding, mixing, and heating liquids.Containing:'

It means that a substance is present inside the beaker.Water: A colorless, odorless, tasteless liquid that is essential for most forms of life.On the basis of given data, we can conclude that:Volume of water = 800 mlVolume of solution = 200 mlMass of HCl = 0.5 gmConcentration of HCl = mat-1From the given data, it is clear that we have two beakers. One of them contains 800 ml of water and the other one contains 200 ml of the solution. The solution contains 0.5 gm of HCl (mat-1).This solution is added to water to make a solution having a mat-1 concentration of HCl.

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The pH at the equivalence point of the titration between \(NH_{4}OH\) (aqueous ammonia) and HCl cannot be determined solely from the given information. Additional information, such as the concentrations of the solutions being titrated and the volume of the titrant, is necessary to calculate the pH at the equivalence point.

The equivalence point of a titration occurs when the stoichiometrically equivalent amounts of the titrant (HCl) and the analyte (NH_{4}OH) have reacted. At the equivalence point, all of the NH_{4}OH has been neutralized by HCl, resulting in the formation of the salt \(NH_{4}Cl\) To determine the pH at the equivalence point, one would need to know the concentrations of the NH_{4}OHand HCl solutions being titrated, as well as the volume of the titrant added. From this information, the moles of\(NH_{4}OH\) and HCl can be calculated, allowing for the determination of the concentration of the resulting NH_{4}Clsolution.

Since NH_{4}Cl is a salt formed from a weak base (NH_{4}OH) and a strong acid (HCl), the resulting solution will be acidic. However, the exact pH at the equivalence point will depend on the specific concentrations and volumes involved in the titration. Therefore, without this additional information, the pH at the equivalence point cannot be determined.

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The volume of the balloon at stp after all the dry ice sublimes is as follows:

We must first determine the moles of dry ice. Dry ice's molecular weight is 44 g/mol.

Mole of dry ice= mass of dry ice/molar mass of dry ice=4/44=0.0909mol

We now need to determine the dry ice's volume. As is common knowledge, 22.4 L of gas are contained in 1 mole of a substance.

As 22.4 L of gas are contained in 1 mole of dry ice. As a result, 0.0909 mole of dry ice holds 2.04 L (or 0.0909 mole x 22.4 L) of gas.

Consequently, the balloon's volume at STP is 2.04L

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The rate of formation of hydrogen gas is:

2Al (s) + 6HCl (aq) → 2AlCl3 (aq) + 3H2 (g).

According to the reaction,

2mol Al can produce 3mol \(H_2\)

0.08mol Al = \(\frac{3*0.08}{2}mol H_2\)

\(= 0.12mol H_2\)

so we can say,

in 20s, 0.12mol H_2 will be produced

The rate of formation of \(H_2\) = \(\frac{mol of H_2 formed}{time taken to form}\)

\(= \frac{0.12}{20}\\\\= 0.006mol/s\)

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Answer:

For reactants : Water , Carbon Dioxide ,  Sunlight

But for products :  Oxygen , Glucose

Explanation:

Answer: 2N2O3 -> 2N2 + 3O2

Explanation:

Answer:

2 2 3

Explanation:

2N2O3=2N2+3O2.. ....

Answer:

3H2 + N2 → 2NH3

Explanation:

3H2 + 1N2 → 2NH3

Or

3H2 + N2 → 2NH3

Explanation:

✰ \( \underline{ \large{ \text{Given \: chemical \: equation : }}}\)

Here , Multiply H₂ by 3 on left hand side and H₃ by 2 on right hand side to equalize hydrogen atoms.

\( \large{ \tt{ \underline{3}H_{2} + \underline{ 1}N_{2} \longrightarrow \: \underline2NH_{3}}}\)

Here , We have 6 hydrogen atoms in both sides. How about Nitrogen atoms? We have 2 Nitrogen atoms in both sides. And yippie !! We got the balanced equation where both the hydrogen and nitrogen atoms are equal.

Hope I helped ! ♡

Have a wonderful day / night ! ツ

# \( \underbrace{ \tt{Carry \: On \: Learning}}\) !!

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The cost to feed 7 dogs per day is $5.83 in given decimal place of a question.

Given that:The cost of 30 lbs of dog food = $33.41

Each dog has two servings per dayOne serving cup contains 167.6 g of dog food1 kg = 2.2 lbs

A point in a numerical value known as a decimal place denotes a portion of a whole number. The decimal point, which separates the whole number component from the fractional portion, is used to indicate it. The digits immediately following the decimal point denote decreasing orders of magnitude, with the first denoting tenths, the second denoting hundredths, and so on.

To find: How much it costs to feed 7 dogs per day.

Solution:1 lb = 1/2.2 kg = 0.45 kg

Therefore, 30 lbs = 30 * 0.45 kg= 13.5 kg

The amount of dog food required per day by one dog is (2 * 167.6 g) = 335.2 g or 0.3352 kgThe amount of dog food required per day by 7 dogs is= 7 * 0.3352 kg= 2.3464 kg

The amount of dog food in 13.5 kg = (13.5/0.3352) * kg= 40.27Therefore, the amount of dog food required to feed 7 dogs per day is less than 30 lbs of dog food.So, the cost to feed 7 dogs per day is:$33.41 * (2.3464/13.5)= $5.83 (2 decimal places) in case of decimal place.

Therefore, the cost to feed 7 dogs per day is $5.83.

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A) F2 and C2H5OH (Heterogeneous mixture)B) H2O and CH3OH (Homogeneous mixture)C) LiCl and C10H20 (Heterogeneous mixture)D) CH4 and C2H5OH (Heterogeneous mixture).

The pair of substances that are most likely to form a homogeneous solution is B. H2O and CH3OH. A homogeneous mixture is one in which the components are evenly distributed throughout the mixture. These types of solutions have uniform properties and the same composition throughout.A heterogeneous mixture is one in which the components are not evenly distributed. This means that the mixture has distinct regions or phases that are visibly different from one another. The following are the most likely pairs of substances to form a homogeneous solution:A) F2 and C2H5OH (Heterogeneous mixture)B) H2O and CH3OH (Homogeneous mixture)C) LiCl and C10H20 (Heterogeneous mixture)D) CH4 and C2H5OH (Heterogeneous mixture).

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