a) What is the purpose of the calibration of the calorimeter in a calorimetry investigation?b) If we did not calibrate the calorimeter, what type of error would this introduce?c) A negative value for the heat capacity should be set to zero. Why? What would a negative value mean, if it was possible?

Answer: Possibility of a single replacement reaction

Explanation:

The activity of the series of element is determined by the single replacement reactions. The activity series of element can be used to predict the possibility of a single replacement reaction.

A single replacement reaction is one in which one substance is replacing the other. The replacement of a metallic ion in solution by a metal atom higher in the activity series than the metal in solution falls into this category of reactions.

The reaction is depending on the reactivity of the elements. If the reactivity of the elements is very low, then the reaction very slow, some time reaction can not take place. To get reaction there is some driving force is needed.

The relative position of the two elements in the activity series provides the driving force for this kind of reaction. More active elements undergo readily reaction then less reactive like noble gas elements. It very necessary to elements very active to get react.

To find more about displacement reaction, refer the link below:

brainly.com/question/3172917

#SPJ2

Answer:

Explanation:

The volume of a substance when given the density and mass can be found by using the formula

\(volume = \frac{mass}{density} \\ \)

From the question

mass of gold = 200 g

density = 20.5 g/mL

It's volume is

\(volume = \frac{200}{20.5} \\ = 9.7560975609...\)

We have the final answer as

Hope this helps you

if you drink the water your not 1year old you can drink just little.

Explanation:

done

Answer:

the whole thing hfddddddddfffffg

The mass of HNO3 obtained is 12.46 g from the given reaction.

The chemical reaction is :

Potassium Nitrate + Sulphuric acid ------> Potassium Bisulphate + Nitric acid.

The above reaction is basically used for the making of nitric acid.

Less than 200 degree celcius the Nitric acid if more than 200 degree celcius then it will form Potassium Sulphate.

Now,

1 mol of KNO3 reacts with1 mol of concentrated H2SO4 to give 1 mol HNO3

Molar Mass of KNO3 = 101.1 g

Molar mass of H2SO4 = 98.07 g

Mass of H2SO4 that can react with 20 g of KNO3 = (20 g* 98.07 g )/ 101.1 g

= 19.4 g

Molar mass of nitric acid= 63.01 g

Hence mass of nitric acid  produced by 20 g of KNO3 = (20 g * 63.01 g ) / 101.1 g = 12.46 g

To know more about Nitric acid here :

https://brainly.com/question/20934865?referrer=searchResults

#SPJ1

Answer:

See explanation

Explanation:

Natural gas is mined along with crude oil in many oil wells. It has the advantage of being a cheap fossil fuels which is easily obtainable.

Generally, natural gas is the cleanest of all the fossil fuels. This means that it is the fossil fuel that least contributes to environmental pollution.

On the other hand; natural gas produces some amount of sulphur as it is burnt and mercury as particulate matter. These substances are quite dangerous to health.

Secondly, the combustion of natural gas leads to the production of the oxides of nitrogen which play a key role in the occurrence of photochemical smog.

Answer:

Mass of A=320g

Volume of A=64cm3

Density of B =3g/cm3

Volume of B = 27 cm3

(Not drawn to scale)

and the density of cube A =5.0g/cm3

Please mark me a brainlist

The density of the object that has been labelled as A from the calculation is  5.0 g/ \(cm^3\). Option B

Density is a physical property of matter that measures how much mass is contained within a given volume.

Density is a fundamental property of matter that describes how mass is distributed within a given volume. It is a useful parameter in various scientific, engineering, and everyday applications.

We know that;

Density = Mass/Volume

= 320 g/64 \(cm^3\)

= 5.0 g/ \(cm^3\) as seen here

Learn more about density:https://brainly.com/question/29775886

#SPJ3

Answer:

The substance will be in liquid state at a temperature of 97.3 °C

Note: The question is incomplete. The complete question is given below :

Suppose a substance has a heat of fusion equal to 45 cal/g and a specific heat of 0.75 cal/g°C in the liquid state. If 5.0 kcal of heat are applied to a 50 g sample of the substance at a temperature of 24°C, what will its new temperate be? What state will the sample be in? (melting point of the substance = 27°C; specific heat of the solid =0.48 cal/g°C; boiling point of the substance = 700°C)

Explanation:

1.a) Heat energy required to raise the temperature of the substance to its melting point, H = mcΔT

Mass of solid sample = 50 g; specific heat of solid = 0.75 cal/g; ΔT = 27 - 24 = 3 °C

H = 50 × 0.75 × 3 = 112.5 calories

b) Heat energy required to convert the solid to liquid at its melting point at 27°C, H = m×l, where l = 45 cal/g

H = 50 × 45 = 2250 cal

c) Total energy used so far = 112.5 cal + 2250 cal = 2362.5 calories.

Amount of energy left = 5000 - 2362.5 = 2637.5 cal

The remaining energy is used to heat the liquid

H = mcΔT

Where specific heat of the liquid, c = 0.75 cal/g/°C, H = 2637.5 cal, ΔT = temperature change

2637.5 = 50 × 0.75 x ΔT

ΔT = 2637.5 / ( 50*0.75)

ΔT = 70.3 °C

Final temperature of sample = (70.3 + 27) °C = 97.3 °C

The substance will be in liquid state at a temperature of 97.3 °C

Unit rate in gallons per week is \(1\frac{5}{9}\) gal/week,if a pump release water at a rate of 10 gallons every 45 days.

Unit rate is the proportion of two distinct units, with denominator as 1. For instance, kilometer/hour, meter/sec, miles/hour, pay/month, and so on. Number-crunching is presumably the most fundamental and old part of math and is regularly utilized in our everyday life. This subject is about the issues in light of numerals and tasks upon numerals. We in all actuality do tackle issues of math deliberately or accidentally during our day to day everyday practice. For instance - While buying vegetables or natural products, in different dealings or in assessing pace of something and so on.

To find the rate, we can first find out how much gallons is released in 1 day, and then find out how much gallons it releases in 7 days/1 week.

For one day rate, the pump releases 10/45 gal/day.

Then we multiply the rate by 7.

So,10/45/gal/day =(10/45)×7 = 70/45gal/day = 14/9gal/day =1\(\frac{5}{9}\)  gal/day

To know more about unit rate,visit here:

https://brainly.com/question/13795269

#SPJ4

The cycle that accounts for most of the cell cycle is the interphase cycle.

The cell is the simplest unit of the organism that can be able to sustain itself. There are several cycles that do go on in the cell.

The interphase cell cycle is the period of a cell's life during which it is actively growing and replicating its DNA. It is divided into three main stages: G1, S, and G2.

In G1, the cell grows and carries out normal functions. In S phase, DNA replication occurs. In G2, the cell checks for errors in replication and prepares for cell division.

Learn more about cell cycle:https://brainly.com/question/13622952

#SPJ1

Solutions that contain water as the solvent are known as aqueous solutions.

A liquid that dissolves another chemical to produce a homogenous mixed solution is known as a solvent. Based on its physiochemical, the solvent, which comprises the majority of something like the liquid, determines why a substance will assume the shape of a solid, liquids, or gas.

Solvents are a group of heterogeneous compounds that can be used to weaken, disintegrate, or distribute other molecules. The ability of a solvent to dissolve another molecular depends on the chemical composition and physical traits of both the solvent and the solute.

To know more about solvent visit :

https://brainly.com/question/14797683

#SPJ4

Kinetic energy isn't made it is converted.

Answer:

Kinetic energy is not made; it is a result of energy transformation.

Explanation:

Answer:

Chlorophyll.

Explanation:

Chlorophyll is also why plants are green.

Pls mark brainliest with the crown

Chloroplasts are the food producers of the cell. The organelles are only found in plant cells and some protists such as algae. Animal cells do not have chloroplasts. Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells.

:)

The heat energy needed to heat the water in the pot to boiling is approximately 753,600 J.

To determine the heat energy needed to heat the water in the pot to boiling, we can use the formula:

Q = m * c * ΔT

Where:

Q is the heat energy (in joules),

m is the mass of the water (in grams),

c is the specific heat of water (in J/(g˚C)),

ΔT is the change in temperature (in ˚C).

Given:

Mass of water (m) = 2400g

Specific heat of water (c) = 4.18 J/(g˚C)

Change in temperature (ΔT) = 100˚C - 25˚C = 75˚C

Plugging these values into the formula, we have:

Q = 2400g * 4.18 J/(g˚C) * 75˚C

= 753,600 J

Therefore, the heat energy needed to heat the water in the pot to boiling is approximately 753,600 J.

learn more about heat energy here

https://brainly.com/question/29210982

#SPJ11

This problem is providing us with the recommended maintenance dose of penicillin for children as 1.0 mg/kg/hr by injection. Thus, the delivery rate for a 40-pound child is required, if 10 mL of a 25 mg/mL solution of penicillin is added to a 100-mL bottle of saline. At the end, the result is 8.0 mL/hr:

In chemistry, dimensional analysis allows us to obtain a specific result given relevant information about it. Although a formula is not always provided, one can use the units as a reference for the calculations.

For example, this problem asks for the rate, in mL/hr, at which a child gets this dose, so the first step will be to get the mass of the child in kilograms:

\(40 lb*\frac{0.4536kg}{1lb}= 18.144kg\)

Next, we calculate the rate at which the penicillin is delivered to this child:

\(1.0\frac{mg}{kg*hr} *18.144kg=18.144\frac{mg}{hr} \)

After that, we calculate the total mass of penicillin that is delivered:

\(10mL*25\frac{mg}{mL} =250 mg\)

And get the new concentration once it is diluted to 100 mL:

\(\frac{250mg}{10mL+100mL}=2.27\frac{mg}{mL} \)

And finally, we combine the mg/hr with the mg/mL to get the result in mL/hr as required:

\(18.144\frac{mg}{hr} *\frac{1mL}{2.27mg}\\ \\=8.0\frac{mL}{hr} \)

Learn more about dimensional analysis: https://brainly.com/question/10874167

The two liquids being measured when obtaining an absorbance spectrum are called the absorbance (A) and the transmittance (T) solutions.

Absorbance is measured using a spectrophotometer or microplate reader, that's an device that shines light of a special wavelength via a sample and measures the quantity of mild that the pattern absorbs.

Absorption spectra (additionally called UV-Vis spectra, absorbance spectra and electronic spectra) display the change in absorbance of a sample as a characteristic of the wavelength of incident light, and are measured the usage of a spectrophotometer.

Definition of absorption spectrum: an electromagnetic spectrum wherein a decrease in depth of radiation at precise wavelengths or ranges of wavelengths characteristic of an soaking up substance is manifested specially as a sample of darkish lines or bands.

Learn more about absorbance spectrum here: https://brainly.com/question/10252035

#SPJ4

The equation derived from the combined gas law is option D: P₁V₁T₁ = P₂V₂T₂. Option D

The combined gas law combines Boyle's law, Charles's law, and Gay-Lussac's law into a single equation that relates the pressure, volume, and temperature of a gas sample. It allows us to analyze changes in these variables while keeping the amount of gas constant.

Boyle's law states that at a constant temperature, the pressure and volume of a gas are inversely proportional. In other words, if the volume of a gas decreases, its pressure increases, and vice versa. This is expressed as P₁V₁ = P₂V₂.

Charles's law states that at a constant pressure, the volume and temperature of a gas are directly proportional. If the temperature of a gas increases, its volume increases, and vice versa. This is expressed as V₁/T₁ = V₂/T₂.

Gay-Lussac's law states that at a constant volume, the pressure and temperature of a gas are directly proportional. If the temperature of a gas increases, its pressure increases, and vice versa. This is expressed as P₁/T₁ = P₂/T₂.

By combining these three laws, we obtain the combined gas law equation: (P₁V₁)/T₁ = (P₂V₂)/T₂. To eliminate the division, we can cross-multiply to get P₁V₁T₂ = P₂V₂T₁, which can be rearranged as P₁V₁T₁ = P₂V₂T₂.

This equation allows us to calculate the final values of pressure, volume, or temperature when any two of these variables change while the amount of gas remains constant. It is particularly useful in analyzing the behavior of gases under different conditions or when studying gas systems.

Option D

For more such question on  gas law visit:

https://brainly.com/question/27870704

#SPJ8

Answer:

it was A for me.. don't know if this will help

Explanation:

To test the effect of an acidic fluid on enzymatic activity, we could design an experiment using the enzyme lactase and its ability to break down lactose.

First, we would prepare a solution of lactase and lactose in a test tube. We would also prepare two solutions of different pH levels, one acidic and one neutral.

Next, we would add a small amount of the acidic solution to one test tube and the neutral solution to another test tube. A control test tube with just lactase and lactose in a neutral solution would also be prepared.

We would then monitor the reaction of lactase on lactose in each test tube by measuring the amount of glucose produced over time using a glucose meter.

If the acidic solution inhibits the enzymatic activity of lactase, we would expect to see a lower amount of glucose produced compared to the neutral and control test tubes.

By comparing the results of the different test tubes, we can determine the effect of an acidic fluid on enzymatic activity.

To know more about enzymatic activity refer here:

https://brainly.com/question/30244328#

#SPJ11

The ideal gas law is the state equation of a hypothetical ideal gas. The volume of the nitrogen gas is 51 I.

The general gas equation, commonly known as the ideal gas law, is the state equation of a hypothetical ideal gas. The ideal gas equation is formulated as:

PV = nRT

In this equation, P refers to the pressure of the ideal gas, V is the volume of the ideal gas, n is the total amount of ideal gas that is measured in terms of moles, R is the universal gas constant, and T is the temperature.

As it is given that the pressure on the nitrogen is 720 torr, the temperature of the gas is 20°C(293 k), and the moles of nitrogen are 2.0 moles. Therefore, using the ideal gas equation the volume of the nitrogen can be written as,

\(pv=nRT\\\\v = \dfrac{nRT}{p}\\\\v = \dfrac{2 \times 62.396 \times 293}{720}\\\\v = 50.7834 \approx 51\)

Thus, the volume of the nitrogen gas is 51 I.

Learn more about Ideal Gas Law:

https://brainly.com/question/4147359

Answer:

answer in picture

Explanation:

The statement give in question is false as 4 hydrogen nuclei are converted into one helim nucleus some gamma rays, only two atom come together for fusion reaction.

The core is the power generator in the Sun. The core radius is close to one-fourth of that of the star. Inside the core, pressures and temperatures are high enough to make fusion. In a nuclear fusion reaction, the nuclei of two atoms come together to make a new atom. In the core of a sun, two hydrogen atoms combine to form a helium atom. The proton-proton cycle is an essential reaction that occurs within the core of the Sun.

H + H → He + ENERGY
In the proton-proton chain reaction, hydrogen nuclei are converted to helium nuclei through many intermediates. This reaction generates high-energy photons (gamma rays). This energy can be calculated by the famous Einstein equation, E = mc2.

Learn more about fusion ; https://brainly.com/question/12701636?referrer=searchResults
#SPJ4

If you want to change the mass of your atom by 1 or more mass units, you can either? Add a proton and Add a neutron.

Explanation:

Option A and Option B is your answers.

To change the mass of your atom by more mass units ; you can add a proton or add a neutron ( A and B )

The nucleus of an atom is composed of a neutron and a proton while the outer shell of an atom comprises of the electrons.

The mass of an atom is dependent on the mass of the nucleus of the atom therefore to increase the mass of the atom by any number of mass units you can either add a proton or a neutron to the nucleus of the cell.

Hence we can conclude that to change the mass of your atom you can add a proton or add a neutron to the nucleus of the atom

Learn more : https://brainly.com/question/14110259

Answer:

2.38 g of oxygen (O2).

Explanation:

What is given?

Mass of potassium chlorate (KClO3) = 6.06 g.

Molar mass of KClO3 = 122.4 g/mol.

Molar mass of oxygen (O2) = 32 g/mol.

Step-by-step solution:

First, let's state the balanced chemical equation. Remember that the decomposition of a compound produces two or more products:

Now, let's convert 6.06 g of KClO3 to moles using its molar mass:

You can see in the chemical equation that 2 moles of KClO3 produce 3 moles of O2. By doing a rule of three with this data, we obtain that:

The final step is to convert from 0.0743 moles of O2 to grams using its molar mass, like this:

The answer is that we will produce 2.38 g of oxygen (O2) from the decomposition of 6.06 g of potassium chlorate (KClO3).

Atmosphere pressure outside is higher as colder air moves in during winter. Therefore, the correct option is option A.

The definition of pressure is force/area. For instance, the weight of something like the snowfall divided by the size of the roof would represent the pressure produced snow on a roof.

Gases are often where pressure in chemistry originates from. Gas is added to a balloon before it is inflated. Gas molecules collide with one another and the balloon's walls. Car tires may appear more deflated in winter than in summer because atmosphere pressure outside is higher as colder air moves in during winter.

Therefore, the correct option is option A.

To know more about pressure, here:

https://brainly.com/question/29341536

#SPJ1

Answer:

so since the model atom was changed as new evidence, and the plum pudding model was a ball of positive charge, the alpha particle scattering which broke up the atom

The correct order of steps in Gram staining is as follows:  crystal violet stain, Gram's iodine mordant, ethanol decolorization, safranin counterstain. The correct option is (B).

1. Crystal violet stain: The bacterial cells are stained with crystal violet, a purple dye. This step helps to stain both Gram-positive and Gram-negative cells.

2. Gram's iodine mordant: Iodine solution is added, which forms a complex with crystal violet, enhancing its binding to the cell walls of bacteria.

3. Ethanol decolorization: Ethanol or ethanol-acetone mixture is used to wash away the crystal violet-iodine complex from the Gram-negative bacteria, making their cell walls more permeable.

4. Safranin counterstain: Safranin, a red dye, is applied to the cells. In this step, Gram-negative bacteria take up the safranin stain, while Gram-positive bacteria retain the crystal violet stain. This differentiation is based on the differences in the cell wall structure.

Among the options provided, option B correctly presents the order of steps in Gram staining.

To know more about "Gram staining" refer here:

https://brainly.com/question/30972880#

#SPJ11

Answer:

11.958129200057586 molecules

Explanation:

When the gas is compressed to a volume of 10.7 L, its pressure is approximately 1.538 atm.

To determine the final pressure of the gas when it is compressed to a volume of 10.7 L, we can use Boyle's Law. Boyle's Law states that at a constant temperature, the pressure and volume of a gas are inversely proportional.

The formula for Boyle's Law is:

P1 * V1 = P2 * V2

Where P1 and V1 represent the initial pressure and volume, and P2 and V2 represent the final pressure and volume.

Given:

Initial volume (V1) = 12.6 L

Initial pressure (P1) = 1.31 atm

Final volume (V2) = 10.7 L (compressed volume)

We need to find the final pressure (P2).

Using Boyle's Law, we can rearrange the formula to solve for P2:

P2 = (P1 * V1) / V2

Substituting the given values:

P2 = (1.31 atm * 12.6 L) / 10.7 L

Calculating this expression:

P2 ≈ 1.538 atm

Therefore, when the gas is compressed to a volume of 10.7 L, its pressure is approximately 1.538 atm.

To learn more about Boyle's Law visit;

https://brainly.com/question/21184611

#SPJ11

Answer:

Fish is the best time to go

Explanation:

Chicken nuggets and a salad and some onion rings and a new charger

The pairs of elements that have their valence electrons in the same shell are; Ne and Ar, and N, As, and Bi. Option A, and E is correct.

Ne and Ar; Both Ne (Neon) and Ar (Argon) are noble gases and belong to Group 18 of the periodic table. They have their valence electrons in the third shell (n=3).

Cl and Cu; Cl (Chlorine) belongs to Group 17 and has its valence electrons in the third shell (n=3). Cu (Copper) belongs to Group 11 and has its valence electrons in the fourth shell (n=4). So, they do not have their valence electrons in the same shell.

Ag and Au; Ag (Silver) and Au (Gold) both belong to Group 11. They have their valence electrons in the fifth shell (n=5), so they do not have their valence electrons in the same shell.

In, Pb, and Bi; In (Indium), Pb (Lead), and Bi (Bismuth) belong to Group 13, 14, and 15, respectively. They have their valence electrons in the fifth shell (n=5), so they do not have their valence electrons in the same shell.

N, As, and Bi; N (Nitrogen), As (Arsenic), and Bi (Bismuth) belong to Group 15. They have their valence electrons in the second shell (n=2), so they have their valence electrons in the same shell.

K, As, and Br; K (Potassium) belongs to Group 1 and has its valence electrons in the fourth shell (n=4). As (Arsenic) belongs to Group 15 and has its valence electrons in the second shell (n=2). Br (Bromine) belongs to Group 17 and has its valence electrons in the fourth shell (n=4). Therefore, they don't have their valence electrons in the same shell.

Hence, A. E. is the correct option.

To know more about valence electrons here

https://brainly.com/question/22649122

#SPJ4

--The given question is incomplete, the complete question is

"Which of the following have their valence electrons in the same shell? A) Ne and Ar, B) Cl and Cu, C) Ag, and Au D) Pb, and Bi E) N, As, and Bi F) k, As, and Br."--