Which two atoms are isotopes of each other?

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:

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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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.

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:

yes, ex: iron cobalt and nickel and elements like this are attracted to magnetism

Explanation:

Answer:

4 sig figs

Explanation:

There are 4 because they are all # 1 or above.

0 has special rules on whether or not it is significant.

0 being between two other sig figs no matter how far apart makes it a sig fig.

example: 101 is 3 sig figs

0 that is at the end of a non decimal number are not significant.

example: 110 is 2 sig figs

0 that are after a decimal are significant as long as they after another sig fig.

example: 1.000 and .1000 are both 4 sig figs

extra examples:

110.01 is 5 sig figs

110.1 is 4 sig figs

.0001 is 1 sig figs

Answer:

1 and 5 I'm pretty sure sorry if i'm wrong the rest look like it wouldn't make sense to me

Explanation:

Answer:

Hey! It's 1 and 5!

Explanation:

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:

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:

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:

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:

A. iodine

C. fluorine

F. bromine

Explanation:

Ionic bonds occur mostly between metals and non-metals. Usually, a wide electronegativity difference is preferred between the two atoms. This makes one atom more desirous to gain electron and other more willing to donate electrons.

To have Zn forming  a compound in the ratio of 1 to 2, the combining power must be similar to this.

The dominant oxidation state of Zn is the is the +2 state.

The other combining atoms must have the ability to recieve the two electrons.

The halogens fit perfectly into this picture. They need just an electron to attain nobility. They are also highly electronegative. If two halogens combines with the Zn, then the ionic bond will result.

The halogens are fluorine,chlorine, bromine, iodine and astatine.

They will form these compounds:

                       ZnF₂, ZnBr₂ and ZnI₂

Final answer:

Iodine, fluorine, selenium, and bromine can form ionic compounds in a 1:2 ratio with zinc since zinc typically exhibits a 2+ charge and these non-metals form -1 anions.

Explanation:

The question asks which elements from a provided list will always form ionic compounds in a 1:2 ratio with zinc. Zinc, being a transition metal, commonly exhibits a 2+ charge in its compounds. For an ionic compound to form with zinc in a 1:2 ratio, the other element must form an anion with a 1- charge to balance the overall charge of the compound, as zinc donates two electrons (one for each anion). From the given options, the elements that will form anions with a 1- charge and hence can form ionic compounds in a 1:2 ratio with zinc (Zn) are: A. iodine (I), C. fluorine (F), E. selenium (Se), and F. bromine (Br). These non-metals typically form -1 anions, which matches the requirement for forming a 1:2 ratio compound with Zn2+. Therefore, the correct options are A. iodine, C. fluorine, E. selenium, and F. bromine.

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:

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.

Answer:

No

Explanation:

Two letters on the top, and two letters on the left. (one letter per square)

Answer:

No, it is not.

Explanation:

To draw a Punnett Square, it can only have 4 letters on 2 sides.

I added an image which is an example.

Answer:4.536 kilograms

Explanation:

for an approximate result, divide the mass value by 2.205

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:

26,167.47m

Explanation:

Problem:

We are to solve this problem using dimensional analysis:

  from the given conversion factors-

      0.621mi = 1.00km

       1km = 1000m

From the problem, we are groing from miles to metres:

      16.25mi x [tex]\frac{1km}{0.621mi}[/tex] x [tex]\frac{1000m}{1km}[/tex]

The mi will cancel out and also the km. This leaves us with the desired unit we want which is meters, m.

       =  26,167.47m

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.

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:

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.

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:

C-Its product is heavier than each of its reactants.

Explanation:

Correct equation:

               ¹⁴₇N + ¹₁H → ¹⁵₈O

In the reaction above, we can conclude within the given conditions of the reaction that the product formed is heavier than the reactants.

The product is oxygen with a mass number of 15 as shown by the superscript preceeding the symbol of the atom.

The reactants are:

       Nitrogen, N with a mass number of 14

      Hydrogen, H with a mass number of 1

The mass number is a true reflection of the mass of an atom. It clearly shows the mass of the nucleons which are the most massive particles that makes up an atom. The nucleons are protons and neutrons that makes up the tiny nucleus of the atom.

Oxygen here has more nucleons that each of Nitrogen and Hydrogen.

Answer:

c

Explanation:

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: 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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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.

Answer:

8.34e23 electrons

Explanation:

One atom o 13C has 6 electrons, 6 protons, and 7 neutrons

so 1.39e23 13C atoms will have 1.39e23 x 6 = 8.34e23

Each Carbon-13 atom has exactly 6 electrons. So, 1.39e23 atoms of Carbon-13 would contain a total of 8.34e23 electrons.

To figure out the number of electrons in 1.39e23 atoms of Carbon-13, you need to understand that each atom of carbon-13 contains exactly 6 electrons (as its atomic number is 6). The total number of electrons is simply the number of atoms multiplied by the number of electrons per atom. Hence, the total number of electrons is 1.39e23 * 6 = 8.34e23 electrons.

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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:

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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