Please help it really important, I will mark brainliest please

Smallest to largest lengths are:7.49×105 mm ,0.45 miles ,885 yards ,34500 inches.

Among the length quantities comprising of millimeters,inches,miles and yards the smallest quantity is of inches.As inches is the smallest quantity and the conversion of other quantities in to inches is easier .

All the other quantities are converted in inches,

7.49×105 mm=786.45 mm

As 1 inch =25.4 mm therefore 786.45 inches /25.4 mm=30.96 inches.

As 1 mile=63360 inches

0.45 miles is equal to  63360×0.45=28512 inches.

As 1 yard=36 inches

thus,885 yard =885×36=31860 inches

As all quantities are now in inches arranging them from smallest to largest lengths

7.49×105 mm

0.45 miles

885 yards

34500 inches

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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 we have

\(volume = \frac{25}{740} = 0.033788... \\ \)

We have the final answer as

Hope this helps you

Observation, theory, and law all play significant roles in the philosophy of science. The statement the reactivity of elements depends on the arrangement of their electrons is a theory.

Chlorine reacts violently with sodium at room temperature and pressure and Neon does not react with sodium at room temperature and pressure are observations.

The statement, If elements are listed in order of the increasing mass of their atoms, their chemical reactivity follows a repeating pattern = law.

In most contexts, the act of sensing the exterior real objects that surround us is known as observation. Observation relies heavily on the use of many sensory organs.

A scientific explanation of a witnessed action or occurrence is an example of what we mean when we talk about theory. It provides an explanation for the observations or events that are based upon any hypothesis that has been demonstrated to be correct. A phenomenon or behavior that has been observed can be described using the term "law." It is widely accepted in most circles as a statement of fact.

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Answer:

sugar is hygroscopic

Explanation:

sugar is hygroscopic

Answer:

You can divide the mass by the volume to calculate the density of the metal

Explanation:

1. Eukaryotes and Prokaryotes: I have a cell membrane (plasma membrane)

2. Eukaryotes: I have nucleus

3. Prokaryotes: Bacteria are an example of me

4. Eukaryotes: Fungi are an example of me.

5. Eukaryotes: Animals are an example of me.

6. Eukaryotes: I contain ribosomes.

7. Eukaryotes: I contain membrane-bound organelles.

8. Eukaryotes and Prokaryotes: I contain cytoplasm.

9. Eukaryotic cell: Your body cells are made of this type of cell.

10. Eukaryotes: Protists are an example of me.

11. Eukaryotes: Plants are an example of me.

12. Eukaryotes and Prokaryotes: I contain genetic material such as DNA.

Prokaryotes are organisms that are composed of cells that do not have a cell nucleus or any membrane-encased organelles.

Eukaryotes are organisms that are composed of cells that have a cell nucleus or any membrane-encased organelles.

An example of a prokaryote is bacteria. Fungi are an example of a eukaryote.

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Answer:

t5gbt 4 tbg3rvb tjj5tb4b4bv

Explanation:fhtb v4bvtvhbvv bh

One-point perspective is a type of linear perspective where all lines converge to a single vanishing point on the horizon line. This technique is particularly suitable when depicting interior spaces or scenes viewed from a single vantage point.

For Jean to accurately depict the height of objects in the room, she should utilize a one-point perspective drawing. One-point perspective is a type of linear perspective where all lines converge to a single vanishing point on the horizon line. This technique is particularly suitable when depicting interior spaces or scenes viewed from a single vantage point.

By placing the vanishing point on the horizon line, Jean can establish a point of convergence for all vertical lines in the room. The height of objects, such as furniture, walls, or doors, can be represented accurately by drawing vertical lines from their base to the vanishing point. This approach creates a sense of depth and proportion, allowing viewers to perceive the relative heights of objects within the room.

Using one-point perspective will help Jean create a clear and realistic representation of the room's spatial arrangement, enabling her to accurately communicate the height relationships between different objects present in the crime scene.

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ANSWER: note the amounts of atoms of all the component in HNO3, which are 1 atom of hydrogen, 1 atom of nitrogen and 3 atom of oxygen.

Answer: answer what..

Answer:

evan..

Explanation:

Answer:

3.34 × 1025 molecules

Water molecules

Explanation:

Water (H2O) has a molecular weight of 18 grams (g), and 1 liter (L) of water weighs 1,000 g. A molecular weight often is simply referred to as a mole. Thus, 1 L of water contains 55.6 moles of water. Multiplying by Avogadro's number we find that 55.6 moles of water contains 3.34 × 1025 molecules.

First of all finding the pressure, again we will be assuming an ideal pressure of 1 atm, this will be our total pressure, now we have to find the partial pressure for H2. The partial pressure for H2O is related to its temperature, when it's 40°C we will have a pressure of 55.37 torr, which is 0.0728 atm

Ptotal = Ph2 + Ph2o

1 atm = Ph2 + 0.0728 atm

Ph2 = 0.927 atm

Now we will add this information to our Ideal Gas law formula:

PV = nRT

0.927 * 0.081 = n * 0.082 * 313

0.075 = 25.66n

n = 0.003 moles

H2 = 2.0158g/mol

0.003 moles of H2 = 6.0*10^-3

Answer:

Following are the answer to this question:

Explanation:

The value of pH solution is =5.17 So, the p^{OH}:

\(p^{OH}\)=14-56.17

      =8.823

The volume of the \(NH_{3}\) = 40.00 ml  

convert into the liter= 0.040L

The value of the concentrated \(NH_{3}\) =0.10 M

The volume of the \(NH_{4}Cl\)= 50.00 ml

convert into the liter= 0.050L

 The value of concentrated \(NH_{4}Cl\)= 0.10 M

The volume of the \(H_{2}So_{4}\)= 30 ml

convert into the liter= 0.030L  

The value of concentrated \(H_2So_4\)=0.05 M

Calculating total volume=(0.40+0.050+0.030)

                                       =0.120 L

calculating the new concentrated value of \(NH_3\) = \(\frac{0.10\times 0.040}{0.120}= 0.33 \ M\)

calculating the new concentrated value of \(NH_4Cl\)= \(\frac{0.050\times 0.10}{0.120}= 0.04166 \ M\)calculating the new concentrated value of \(H_2So_4= \frac{0.030\times 0.05}{0.120}= 0.0125 \ M\) when 1 mol \(H_2So_4\) produced 2 mols \(H^{+}\) so, 0.0125 in \(H_2So_4\)produced:

\(=4 \times (2 \times 0.0125) \ mol H^{+}\\\\= 0.025 mol H^{+}\)

create the ICE table:    

\(NH_3 \ \ \ \ \ \ \ \ + H^{+} \ \ \ \ \ \ \longrightarrow NH_4^{+}\)                    

I (m)       0.033(m)            0.025                       0.04166

C            -0.025                 -0.025                       + 0.025  

E            8.3\times 10^{-3}     0                    0.0667

now calculating pH:

when ph= 8.83:

\(P^{H}= p^{kb}|+ \log\frac{[NH_4^{+}]}{[NH_3]}\\\\8.83=p^{kb}+\log\frac{0.0667}{8.3 \times 10^{-3}}\\\\p^{kb}=8.83-0.9069\\\\ \ \ \ =7.7231 \\\\\ The P^{kb} \ for \ NH_3 \ is =7.7231\\\\\ The P^{kb} \ for N^{+}H_4=14-7.7231\\\\\ \ \ \ \ \ =6.2769\)

Answer:

3.7 x 10^23

is the right answer

Answer:

Changes in environment, food source changes and disease?

Explanation:

I dont know what the answer choices are

Answer:

changes in the environment

Explanation:

like digging big holes.

Hope this helps!

Classrooms have grown less artificial by deliberately arranging social activities and games that promote healthy interactions. Students can discuss critical subjects with you in a private setting during class time.

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The induced-fit hypothesis of enzyme-substrate interaction illustrates that there is a conformational change in the active site of the enzyme when a substrate binds to it.

According to the induced-fit model, a substrate attaches to an active site, and the two of them slightly alter their shapes to form the perfect fit for catalysis. By bringing substrates together in the best possible orientation, enzymes encourage chemical reactions by establishing the perfect chemistry for the reaction to take place. According to the induced fit hypothesis, an enzyme's active site is not architecturally ideal for substrate binding while it is in the unbound state, or when it is not binding to a substrate. Refer to the image attached for the cartoon illustration.

This induced fit theory extends the lock-and-key idea proposed 100 years ago. In addition to explaining regulatory and cooperative effects, the new theory put out by D. E. Koshland, Jr. in 1958 also provides some new specificity notions. This theory states that an enzyme's unbound active region is not structurally suitable for substrate binding (i.e., not bound to the substrate).

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Answer:

Explanation:

Aniline is an organic compound with the formula C6H5NH2. Consisting of a phenyl group attached to an amino group, aniline is the simplest aromatic amine.

Answer: Al₂O₃

Explanation:

Atoms of Cr are in 24.95g of chromium is calculated as 2.89 *10^23. The molar mass is the mass in grams of one mole of material.

In chemistry, molar mass of chemical compound is defined as mass of a sample of that compound divided by the amount of substance which is number of moles in that sample, measured in moles. The molar mass is a bulk and not a molecular property of a substance.

As we know, molar mass of chromium is 52.00 g mol^-1

Avogadro's number is 6.022 *10^23

Number of atoms= (24.95/52) * 6.022 *10^23

So, number of atoms = 2.89 *10^23.

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Answer:

1.E25 it is the answer the answer to mass of 1×10^25 molecules of water​

Explanation:

this is just EXPLINATION find your answer using this

first divide the number of molecules by Avogadro's number 6.022*10^25

you will

l get no. of Moles of water

multiply the no. of Moles with mass of 1 Mole of water 18g per mole

if get answer you comment

you should try on your own you will understand better

Concepts used:

1 mole of an element or a compound has 6.022 * 10²³ formula units

So, we can say that: Number of formula units = number of moles * 6.022*10²³

number of moles of an element or a compound = given mass/molar mass

__________________________________________________________

003 - Number of CaH₂ formula units in 6.065 grams

Number of Moles:

We know that the molar mass of CaH₂ is 42 grams/mol

Number of Moles of CaH₂ = given mass/molar mass

Number of moles = 6.065 / 42

Number of moles = 0.143 moles

Number of Formula units:

Number of formula units = number of moles * 6.022*10²³

= 0.143 * 6.022 * 10²³

= 0.86 * 10²³ formula units

__________________________________________________________

004 - Mass of 6.34 * 10²⁴ formula units of NaBF₄

Number of Moles:

We mentioned this formula before:

Number of formula units = number of moles * 6.022*10²³

Solving it for number of moles, we get:

Number of moles = Number of Formula units / 6.022* 10²³

replacing the variable

Number of moles = 6.34 * 10²⁴ / 6.022*10²³

Number of moles=  10.5 moles

Mass of 10.5 moles of NaBF₄:

Molar mass of NaBF₄ = 38 grams/mol

Mass of 10.5 moles = 10.5 * molar mass

Mass of 10.5 moles = 10.5 * 38

Mass = 399 grams

__________________________________________________________

005 - Number of moles in 9.78 * 10²¹ formula units of CeI₃

Number of Moles:

We have the formula:

Number of moles = Number of Formula units / 6.022* 10²³

replacing the variables

Number of Moles = 9.78 * 10²¹ / 6.022*10²³

Number of Moles = 1.6 / 10²

Number of Moles = 1.6 * 10⁻² moles   OR   0.016 moles

The atomic weight of Aluminum (AL) is 26.98. It has 14 neutrons. Aluminum has  an atomic number 13. Therefore, option B is correct.

The atomic number of an element represents the number of protons in the nucleus of its atoms. Since the atomic number of an element is unique and determines its position in the periodic table, aluminum has an atomic number of 13.

The number of electrons in a neutral atom is equal to the number of protons, which in this case is 13. Therefore, aluminum has 13 electrons.

The atomic weight of aluminum (Al) is 26.98, which represents the weighted average mass of all the naturally occurring isotopes of aluminum, taking into account their relative abundances. The number of neutrons in an atom of aluminum is given as 14.

Thus, the correct option is B.

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Answer:

11

Explanation:

Atomic number is the number of PROTONS an element has .

There are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

To determine the number of moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3, we need to consider the stoichiometry of the compound.

The formula of aluminum sulfate (Al2(SO4)3) indicates that for every 1 mole of the compound, there are 2 moles of aluminum ions (Al3+). This means that the mole ratio of Al3+ to Al2(SO4)3 is 2:1.

Given that we have 0.42 mol of Al2(SO4)3, we can calculate the moles of Al3+ as follows:

Moles of Al3+ = 0.42 mol Al2(SO4)3 x (2 mol Al3+ / 1 mol Al2(SO4)3)

Moles of Al3+ = 0.42 mol Al2(SO4)3 x 2

Moles of Al3+ = 0.84 mol Al3+

Therefore, there are 0.84 moles of aluminum ions (Al3+) present in 0.42 mol of Al2(SO4)3.

It's important to note that the stoichiometry of the compound determines the mole ratio between the different species involved in the chemical formula. In this case, the 2:1 ratio of Al3+ to Al2(SO4)3 allows us to determine the number of moles of Al3+ based on the given amount of Al2(SO4)3.

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The balanced chemical equation is AlI₃(s) + 3 K(s) → 3 KI(s) + Al(s). The number of moles of aluminium will be 2.437moles.

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