Can magnetism be used to identify a substance

Answer:

219.125 kg.

Explanation:

Density: This can be defined as the ratio of mass of a body to the nolume of the body.

The Formula of density is given as,

D = m/v ................... Equation 1

Where D = Density of benzene, m = mass of benzene, v = volume of benzene.

Make m the subject of the equation

m = Dv ................. Equation 2

Given: D = 0.8765 g/mL, v = 250 mL.

Substitute into equation 2

m = 0.8765×250

m = 219.125 kg.

Hence the mass of benzene = 219.125 kg.

The mass of 250.0 mL of benzene is 219.125 grams if the density of benzene is 0.8765 g/mL.

​

Density is a physical property of a substance that describes how much mass is contained in a given volume. It is calculated by dividing the mass of an object or substance by its volume. The formula for density is:

Density = Mass / Volume

The units of density depend on the units of mass and volume used in the calculation. Common units of density include grams per milliliter (g/mL) for liquids and solids, and grams per cubic centimeter (g/cm³) for solids.

Density is often used to characterize and compare the properties of different materials and substances.

Given:

Volume of benzene = 250.0 mL

Density of benzene = 0.8765 g/mL

Mass = 250.0 mL × 0.8765 g/mL

Mass = 219.125 g

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Answer:

extensive properties depend on the amount of matter being used. intensive properties do not depend on the present substantive.

Explanation:

The quantity of materials in a sample determines whether a property is referred to as an extensive property. The type of matter in a sample, not the quantity, determines an intense attribute of matter.

Physical properties are defined as the properties of matter that may be seen and measured without affecting the sample's chemical composition. Physical characteristics of substances and systems are frequently referred to as extensive and intensive characteristics.

Mass, weight, and volume are examples of extensive qualities that change depending on the amount of the substance. Contrarily, intensive qualities, such as color, melting point, boiling point, electrical conductivity, and physical state at a specific temperature, are independent of the amount of the substance present.

Thus, the quantity of materials in a sample determines whether a property is referred to as an extensive property. The type of matter in a sample, not the quantity, determines an intense attribute of matter.

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Answer:

False

Explanation:

''A mixture is the chemical bonding of two or more substances in any proportion'' is false statement because a mixture don't include bonding of chemical substances.  

Mixtures in chemistry are including blending of substances and we have two tipes of mixture:

Some of the chemical mixtures are: mixture of water and sand, mixture of sand and iron filings and more...

If we are talking about bonding in chemistry there are Covalent bonds and Ionic bonds.

Answer:

The statement is False.

Explanation:

A mixture contains two or more elements present in it.

The elements are not in chemical combination with each other.

A compound too contains two or more elements but they are in chemical combination.

For example NaCl  is a compound which contains 1 part of Sodium and 1 part of Chlorine.

[tex]H_2 O[/tex] is a compound 2g of hydrogen is chemically combined with 16g of Oxygen.

Chemical bonding is the attractive forces  which holds the atoms together in a molecule.

NaCl - the attractive force is called as Ionic bond.

[tex]H_2 O[/tex] - the bond present is a covalent bond

A mixture has two or more elements but there is no chemical bonding present in it. The components of a mixture can be easily separated from it.

If the data from an investigation do not support the original hypothesis, the correct next step is to revise the hypothesis and perform another experiment. Data is not manipulated to fit the hypothesis; instead, the hypothesis is adapted based on the objective data collected. The goal is to advance knowledge through a reliable scientific process.

When the data from an investigation do not support the original hypothesis, the appropriate next step is to revise the hypothesis and conduct a new experiment. It is essential to understand that manipulating data to fit a hypothesis is not a valid scientific practice. Instead, the hypothesis must be adjusted to reflect the reality of the data collected. This iterative process of hypothesis testing is at the core of the scientific method, which values objectivity and systematic investigation whether in a laboratory setting or through natural observation.

Experiments are tools for gathering objective data to determine whether a hypothesis is supported or refuted. If the data do not support the hypothesis, this does not imply that the data are incorrect. Rather, it may indicate that the hypothesis needs to be revised. The new hypothesis should then be tested with a fresh experiment, furthering our understanding of the phenomenon under study.

Ultimately, the goal is not to force the data to fit preconceived notions but to let the data guide the development of credible scientific theories. This process contributes to the advancement of knowledge in the field and ensures that scientific findings are reliable and can be built upon.

Answer: Eukaryotic cells are very diverse in shape, form and function. Some internal and external features, however, are common to all. These include a plasma (cell) membrane, a nucleus, mitochondria, internal membrane bound organelles and a cytoskeleton.

Explanation:  Both prokaryotic and eukaryotic cells have structures in common. All cells have a plasma membrane, ribosomes, cytoplasm, and DNA. The plasma membrane, or cell membrane, is the phospholipid layer that surrounds the cell and protects it from the outside environment.

All eukaryotic cells have various common characteristics and structures such as -nucleus and other membrane-bound compartments or organelles that help in giving all of them a specialized function.

A eukaryotic cell is a type of cell that contains the nucleus and other membrane-bound compartments or organelles that help in giving all of them a specialized function.

Thus, All eukaryotic cells have various common characteristics and structures such as - nucleus and other membrane-bound compartments or organelles that help in giving all of them a specialized function.

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Answer:

We need a picture of the problem to solve!

Explanation:

Potential energy is greatest at the top of a loop (like a rollercoaster or pendulum), due to height and gravity. Kinetic energy, or the energy of motion, is greatest at the bottom of the loop, due to speed and the downward pull of gravity.

The distinction between where kinetic energy and potential energy are greatest in the loop of, say, a roller coaster or pendulum swing depends on gravity and motion.

At the top of the loop, the potential energy is at its greatest. This energy is stored due to the object's position relative to other objects, height, and gravity. Potential energy is highest when the rollercoaster is at its highest point because gravitational pull is maximized and movement is momentarily paused.

On the other hand, kinetic energy, which is energy in motion, is greatest at the bottom of the loop. This is because all the potential energy has been converted into kinetic energy as the rollercoaster or pendulum descends, speed increases, and pulls downwards by gravity.

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Answer:4.536 kilograms

Explanation:

for an approximate result, divide the mass value by 2.205

Answer:

Salt Water

Explanation:

A substance is homogeneous if its composition is identical wherever you sample it - it has uniform composition and properties throughout. Homogeneous is Latin for the same kind. If a substance is not homogeneous, it is said to be heterogeneous.

Answer:

Cobalt sulfide

Explanation:

Cobalt sulfide

The name of the compound CoS is Cobalt Sulfide. It consists of one atom of Cobalt (Co) and one atom of Sulfur (S). The name follows standard chemical naming conventions.

The compound CoS refers to a molecule composed of one atom of cobalt (Co) and one atom of sulfur (S). In the naming conventions of chemical compounds, the first element usually retains its standard name, while the second element has its ending changed to '-ide'. Thus, the name of the compound CoS would be 'cobalt sulfide.' It's important to note here that the prefix 'mono-' that is used to denote single atoms is usually omitted, hence we don't say 'monocobalt monosulfide'. To ensure the correctness of the names, strict rules are followed in Chemistry to avoid ambiguity.

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Answer:

If you walk 2km from your kouse to a store then back nome your displacement is 0km.

Explanation:

Displacement is defined as the distance from your original location. The displacement of the question is 0 because even though you left your house, you came back you your original position. Therefore you are 0km from your original position and have a displacement of 0km.

Your displacement in this case is Zero

Your displacement is the shortest straight-line distance from your initial position to your final position, regardless of the path you took. In this case, you walked 2 km from your house to the store and then walked 2 km back home.

Since you ended up back at your starting point, your final position is the same as your initial position.

Therefore, your displacement is 0 km. Displacement takes into account only the change in position, not the path taken, and since you ended up where you started, there is no net change in position, resulting in a displacement of 0 km.

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Answer:

Qualitative: Physical observations (the sky is blue, the water is boiling, etc.)

Quantitative: Numberical observations (density= 1 g/ml, volume= 14 ft^3, etc.)

Explanation:

The way to remember it is quaLitative is qualities of the object. QuaNtitative is quantities of the object.

Qualitative physical properties describe the quality of matter without numbers, such as color, while quantitative properties involve numbers and units, like a substance's melting point.

Qualitative and quantitative physical properties differ in the way they describe matter. Qualitative physical properties describe the quality of a substance without using numbers. For example, sulfur being yellow is a qualitative description. On the other hand, quantitative physical properties specify the quantity and include numerical values with units, such as a book having 650 pages.

To illustrate these differences, consider the physical property of color. Color is a qualitative property because it describes what we see without measurement. In contrast, melting point is a quantitative property because it provides a specific temperature at which a substance changes from a solid to a liquid, such as ice melting at 0°C.

The answer is option A "second." The SI unit of time is a second other units of measure consist of mass, metre, temperature, and kilogram. A second is how you measure time because how 60 seconds equal a minute, 60 minutes equal a hour, 24 hours equal a day then so on.

Hope this helps.

Freshness of french fries is dependent variable , time is independent variable,jar is controlled variable.

Variables are defined as any characteristics, number or quantity which can be measured . It can also be called as a data item . It is called as variable because they can vary and can have variety of values.

There are three types of variables 1) manipulated variable where in a condition is specified, 2) responding variable which is dependent on manipulated variable 3)controlled variable which do not change

Example of manipulated variables are number of hours spent by a student studying , that of responding variable is result of a student and temperature is an example of controlled variable.Variables are useful in analysis of variables.

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Answer: hi

Explanation:

Answer:

Oxygen's atomic weight is 16.00 amu. 1 mole of oxygen is 6.02 x 1023 atoms of oxygen 1 amu = 1.661 x 10-24g What is the molar mass (g/mole) of oxygen? Molar mass (in grams) is always equal to the atomic weight of the atom!

Explanation:

i looked it up ok

Answer:

Mass of sodium + nitrogen +oxygen+ oxygen+ oxygen = =85 g/mol

Explanation:

Molar mass is the mass of 1 mole of the substance and its unit is g/mol

We find the molar mass by just adding atomic mass of the elements present in the chemical formula of the compound

For example  

[tex]H_2 SO_4[/tex]

Atomic mass of H is 1.008 (approximately 1)

Atomic mass of S is 32

Atomic mass of O is 16

There are 2, H atoms 1, S atom and 4, O atoms

So, the molar mass of the compound [tex]H_2 SO_4[/tex] will be

[tex]\\$=[(2 \times 1)+(1 \times 32)+(4 \times 16)]$\\\\$=(2+32+64)=98 \frac{g}{m o l}$[/tex]

The question says 1, Na  

1, N and  

3, O

So the chemical formula we get is [tex]NaNO_3[/tex]

The molar mass of the compound [tex]NaNO_3[/tex] is

[tex]\\$=[(1 \times 23)+(1 \times 14)+(3 \times 16)]$\\\\$=(23+14+48)$[/tex]

=85 g/mol (Answer)

Answer:

P'(-30, -20), Q'(10, -50), R'(40, 0)

Explanation:

Multiply each coordinate by 5 to get your above answer.

I am joyous to assist you anytime.

The vertices of triangle PQR are dilated by a factor of 5 resulting in new vertices P′(-30,-20), Q′(10,-50), and R′(40,0).

The given task is about a geometric transformation called dilation. In the game of dilation, each point moves closer to or further from the origin (0, 0) based on the scale factor. Here, the given triangle is dilated by a scale factor of 5. So, each coordinate of the triangle would be multiplied by that factor.

Let's calculate:

Therefore, the coordinates of the vertices of triangle P′Q′R′ after dilation will be P′(-30,-20), Q′(10,-50), and R′(40,0).

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Answer:

The answer is: If mass remains the same while the volume of a substance decreases, the density of the substance will increase.

Explanation:

Let's make an example:

If we have a wood block that's 1 kg, and the volume of the block is 1 cubic meter, that means that we have a wood block with a density of 1 kg/m3. If we now decrease the volume down to 0.2 cubic meters, while the mass stays at 1 kg, we suddenly have a change of density. Why?

If we now try to increase the volume of the wood block, with the mass increased as well, equal to the amount of increased volume, to get to 1 m3, we need to increase the size of the wood block 5 times, meaning the mass increases 5 times. So, we have now a wood block with a volume of 1 cubic meter and 5 kg, which leaves us with a density of 5 kg/m3, which is, again, 5 times higher than we started with.

Answer:

C. An explanation

Answer:

B. 33 mm²

Explanation:

The language "product" means that we must multiply the numbers given to get our answer.

5.4 mm × 6.02 mm = 33 mm²

The significant figures rule for multiplication is that we must us the amount of significant figures in the number with the least significant figures, in this question this is 2 significant digits from 5.4 mm.

Among the given options, balance is an object which is not utilized in order to hold liquids. Thus, the correct option for this question is C.

The characteristic properties of liquids are as follows:

Objects like flasks, graduated cylinders, and test tubes hold liquid on the basis of their intensity. While balance is an instrument that is used to measure the weight or mass of compounds or substances which is present in solid forms.

Therefore, balance is an object which is not utilized in order to hold liquids. Thus, the correct option for this question is C.

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Answer:

3.9602 x 10^2

Explanation:

You would first multiply the two together, making sure to put it in correctly on your calculator. Then that would lead you to " 396.04".

Since scientific notation must be between 1-10 you would move the decimal two spots to the left to make it smaller, then keeping in mind that to get it back where it was you must multiply the 10 by a positive two to bring it back a positive two spots.

After converting to the same units, the sum of 1.26 x 10⁴ kg and 2.5 x 10⁶ g (converted to 2.5 x 10³ kg) is 1.51 x 10⁴ kg, when added using proper scientific notation.

To solve the given problem in scientific notation, we first need to convert all units to kilograms. We are given 1.26 x 10⁴ kg and 2.5 x 10⁶ g. Remember that there are 1000 grams in 1 kilogram, so we must divide the grams by 1000 to convert to kilograms. This means that 2.5 x 10⁶ g is equivalent to 2.5 x 10⁶ g x 10⁻³ kg/g = 2.5 x 10³ kg.

Now, both quantities are in kilograms, so we can add them together:

1.26 x 10⁴ kg + 2.5 x 10³ kg = (1.26 + 0.25) x 10⁴ kg = 1.51 x 10⁴ kg.

Thus, the sum in kilograms, using proper scientific notation, is 1.51 x 10⁴ kg.

Answer:

The correct answer will be options-

1. Both artists and scientists use their imagination to create things.

2. Both artists and scientists rely on others in their field for inspiration.

3. Both artists and scientists use technological innovations to explore new possibilities.

Explanation:

The artist and scientist share many common features related to their philosophy and exploration.

Both artist and scientist acquire new ideas and talent by the previous work done by experts in their fields. They take inspiration from them to do new work.

An artist creates a new piece of work by imagination like a painter which is also used by the scientist to think new ideas in a scientific investigation like the theory of relativity was based on the logical imagination.

An artist and a scientist use the new technologies to advance their work in their respective fields and thus, the selected options are the correct answer.

Answer:

1.) Both artists and scientists use their imagination to create things.

2.)Both artists and scientists rely on others in their field for inspiration.

4.)Both artists and scientists use technological innovations to explore new possibilities.

Explanation:

Correct on edge 2021

Answer:

A. Do some background research

There are 5 steps for the scientific method while doing an experiment

Step 1: make a question

Step 2: research that question

Step 3: Hypothesis

Step 4: Test and collect data

Step 5: Conclusion

Answer:

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Explanation:

Answer:

Explanation:

Plutonium is a radioactive element belonging to the actinide series on the peroidic table. It is located on the f-block.

The isotope of plutonium with a neutron number of 144 can be expressed below:

                                      ²³⁸₉₄Pt

238 is the mass number of the isotope

94 is the atomic number

Pt is the symbol of this isotope.

The mass number is the sum of the protons and neutrons in the nucleus of the atom of an element. Here, the number of protons is 94 and it is the same as the number of electrons. Since the given number of neutrons is 144, combining them gives 238 as the value of the mass number.

The atomic number is the number of protons in the atom which is 94.

They are located on the right side of the periodic table. Metals are located on the left side of the periodic table.

Hope that helps!!

Answer:

1.115 Kg of HF needed to react with UO₂.

Explanation:

Given data:

Mass of UO₂ = 3.76 Kg   (3.76× 1000 = 3760 g)

Mass of HF = ?

Solution:

First of all we will write the balance chemical equation.

UO₂(g) + 4HF(g) → UF₄ (g) + 2H₂O(l)

Now we will calculate the number of moles of UO₂.

Number of moles = mass / molar mass

Molar mass of UO₂ = 270.03 g/mol

Number of moles = 3760 g / 270.03 g/mol = 13.9244 mol

Now we will compare the moles of HF and UO₂ from balance chemical equation.

                   UO₂    :    HF

                    1         :     4

              13.9244    :    4×13.9244 = 55.7 mol

Mass of HF = number of moles × molar mass

Mass of HF = 55.7 mol × 20.01 g/mol

Mass of HF = 1114.56 g

In kilogram:

1114.56 / 1000 = 1.115 Kg

Answer:

An experiment is a research method performed within a completely controlled environment that uses groups of individuals ( subjects), one of which the factors being tested are not spplied on, an independent factor of the hypothesys ( to be tested ), for example the resilience of a group of teenagers) and a dependant factor that is applied to check how it varyes depending on the tested factor ( for example, the most challanging experience of their generation)

Answer:

385 miles

Explanation:

To solve this question using dimensional analysis we first must seperate the speed into a fraction. Then we multiply this by the amount of hours, this will cancel out the hours giving us the speed.

[tex]\frac{55 mi}{1h}[/tex] × 7 h = 385 miles

Answer:

63 mL

Explanation:

To find the amount of mililiters in an amount of liters, we must multiply by the amount of liters by 1000.

0.063 L × 1000 = 63 mL

Answer:

fating on acid and bases will give u the property of paper blue litmus and they tase sour and they typically contain an =oh group with slippery stuff and a propety of acids

Explanation:

Acids are substances that release hydrogen ions in solution, participate in chemical reactions, and are classified by how many protons per molecule they can give up in a reaction. Acid strength varies, with strong acids ionizing completely in solution and weak acids partially ionizing.

An acid is a type of substance with specific properties. First, an acid is a substance that releases hydrogen ions (H*) in solution. This release of ions means that a positively charged hydrogen ion is just a proton and this proton is likely to engage in chemical reactions. Acids are also classified by the number of protons per molecule they can give up in a reaction, with monoprotic acids like HCl containing one ionizable hydrogen atom.

Another property of acids is that their strength varies. Strong acids, like hydrochloric acid, ionize completely and release all their hydrogen ions in the solution, while weaker acids like vinegar or acetic acid do not ionize completely, leaving some of their hydrogen ions still bonded within the compound in the solution. Therefore, the stronger the acid, the more readily it donates its H*.

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