Balance chemical equation hbr(aq)+o2(g) h20+br2

Answer:

Dissolving a solid in liquid, such as table salt in water, is a physical change because only the state of the matter has changed. Physical changes can often be reversed. Allowing the water to evaporate will return the salt to a solid state.

The average atomic mass of titanium on the given planet is approximately 46.68164 atomic mass units (u). The average atomic mass may vary depending on the specific isotopic composition of titanium found on different celestial bodies or regions.

To calculate the average atomic mass of titanium on the given planet, we need to consider the natural abundances and masses of each isotope of titanium.

The average atomic mass is calculated by multiplying the natural abundance of each isotope by its respective mass and summing them up.

Let's perform the calculation step by step:

Step 1: Multiply the abundance of each isotope by its mass:

(73.700% * 45.95263 u) + (15.000% * 47.94795 u) + (11.300% * 49.94479 u)

Step 2: Calculate the individual contributions from each isotope:

= (0.737 * 45.95263) + (0.150 * 47.94795) + (0.113 * 49.94479)

Step 3: Add up the individual contributions:

= 33.84765431 + 7.1921925 + 5.64179347

Step 4: Sum up the contributions:

= 46.68164 u

Therefore, the average atomic mass of titanium on the given planet is approximately 46.68164 atomic mass units (u).

It's important to note that the calculation assumes the provided natural abundances are accurate and representative of the titanium isotopes on that planet.

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Answer: Lithium - 8

Answer:

Lithium-8

Explanation:

The atom with three protons and five neutrons that has a mass number of eight is known as lithium-8.

Answer:

A ) New rocks floating to the surface of the crust.

TRUST

The phrase which best describes nuclear fusion is: A. the process by which small nuclei combine into a larger nucleus.

A nuclear reaction can be defined as a type of chemical reaction in which the nucleus of an atom of a radioactive chemical element is transformed by either being joined (fusion) or split (fission) with the nucleus of another atom of a radioactive chemical element and accompanied by a release of energy.

Generally, there are two (2) main types of nuclear reaction and these include:

In conclusion, nuclear fusion is best described as the process by which small nuclei combine into a larger nucleus, accompanied by a release of energy.

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The internal energy △E of the gas increased by 7,012.5 J.

The internal energy change of a system is given by the equation: ΔE = q + w where ΔE is the change in internal energy, q is the heat added to the system, and w is the work done by the system.

Since the volume remains constant, no work is done, so w = 0. Therefore, ΔE = q.

The heat added to the system is given by the equation:

q = nC(v)ΔT

where n is the number of moles of gas, C(v) is the molar specific heat capacity at constant volume, and ΔT is the change in temperature.

Substituting the given values, we get:

q = (1.00 mol) x (25.00 J/mol.K) x (280.5 K - 140.0 K)

q = 7,012.5 J

Therefore, the internal energy change for this process is:

ΔE = q = 7,012.5 J

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Answer:

Car B has more inertia than Car A

Explanation:

Given that,

Mass of car A = 1500 kg

Mass of car B = 2000 kg

Inertia is directly proportional to the mass of an object. Inertia is the measure of the mass of an object.

In this case, the mass of car B is more than that of car A, it means the inertia of car B is more than that of car A.

Hence, the correct option is (c) "Car B has more inertia than Car A".

The gas that has a volume of 752 mL at 1.98 atm and 62°C is most likely NO₂ (option D).

The volume of a sample of gas can be calculated using the following formula:

PV = nRT

Where;

According to this question, the volume of a sample of gas (2.49 g) was 752 mL at 1.98 atm and 62°C. The number of moles is as follows:

1.98 × 0.752 = n × 0.0821 × 335

1.489 = 27.5n

n = 0.054mol

molar mass of the gas = 2.49g ÷ 0.054mol = 45.99g/mol

The gaseous substance with the molar mass of 45.99g/mol is NO₂.

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Answer:

\(m_{PbI_2}=23.6gPbI_2\)

Explanation:

Hello!

In this case, since the undergoing chemical reaction is:

\(2KI+Pb(NO_3)_2\rightarrow 2KNO_3+PbI_2\)

Thus, given the masses of potassium iodide (166.0028  g/mol) and lead (II) nitrate (331.2 g/mol), we compute the yielded moles of lead (II) iodide in order to identify the limiting reactant:

\(n_{PbI_2}^{by\ KI}=17.0gKI*\frac{1molKI}{166.0gKI}*\frac{1molPbI_2}{2molKI} =0.0512molPbI_2\\\\n_{PbI_2}^{by\ Pb(NO_3)_2}=25gPb(NO_3)_2*\frac{1molPb(NO_3)_2}{331.2gPb(NO_3)_2}*\frac{1molPbI_2}{1molPb(NO_3)_2} =0.0755molPbI_2\)

Thus, since potassium iodide yields the fewest moles of product, we infer that 0.0512 moles of lead (II) iodide are theoretically yielded, so the associated mass is:

\(m_{PbI_2}=0.0512molPbI_2*\frac{461.01gPbI_2}{1molPbI_2} \\\\m_{PbI_2}=23.6gPbI_2\)

Best regards!

Answer:

No, it is not sufficient

Please find the workings below

Explanation:

Using E = hf

Where;

E = energy of a photon (J)

h = Planck's constant (6.626 × 10^-34 J/s)

f = frequency

However, λ = v/f

f = v/λ

Where; λ = wavelength of light = 325nm = 325 × 10^-9m

v = speed of light (3 × 10^8 m/s)

Hence, E = hv/λ

E = 6.626 × 10^-34 × 3 × 10^8 ÷ 325 × 10^-9

E = 19.878 × 10^-26 ÷ 325 × 10^-9

E = 19.878/325 × 10^ (-26+9)

E = 0.061 × 10^-17

E = 6.1 × 10^-19J

Next, we work out the energy required to dissociate 1 mole of N=N. Since the bond energy is 418 kJ/mol.

E = 418 × 10³ ÷ 6.022 × 10^23

E = 69.412 × 10^(3-23)

E = 69.412 × 10^-20

E = 6.9412 × 10^-19J

6.9412 × 10^-19J is required to break one mole of N=N bond.

Based on the workings above, the photon, which has an energy of 6.1 × 10^-19J is not sufficient to break a N=N bond that has an energy of 6.9412 × 10^-19J

Answer:

(D) petroleum

Explanation:

because as we know that petroleum is obtain from the sea bed,within the remains of animals and plants which lived millions of year ago......

Answer:

1.38 M

Explanation:

Need to use the Molarity equation M=n/L

23.5g/ 17.031g/mol NH3 = 1.38 moles

1.38 moles/ 1.0 L = 1.38 M

Once alcohol is in the bloodstream it will reach the brain in a few seconds to minutes, depending on various factors such as the amount and concentration of alcohol consumed, body weight, metabolism, and other individual factors.

Alcohol can swiftly cross the blood-brain barrier after it is ingested, having an impact on the brain and neurological system. Depending on the quantity and frequency of drinking, alcohol's effects on the brain can range from minor disturbances in judgment and coordination to more serious consequences including loss of consciousness and, in the worst circumstances, death.

Long-term changes in brain structure and function, such as cognitive impairment and a higher chance of developing specific neurological and mental illnesses, can also result from chronic alcohol consumption.

Once alcohol is in the bloodstream it will reach the brain in a few seconds to minutes, depending on various factors such as the amount and concentration of alcohol consumed, body weight, metabolism, and other individual factors.

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Explanation:

hdhehdbrhdns dhdjdjdhrjs dhfirjr rudjdbe dbdud d

Answer:

Matter can change from one state to another if heated or cooled. If ice (a solid) is heated it changes to water (a liquid). This change is called MELTING. If water is heated, it changes to steam (a gas).

Explanation:

Answer:

75.9 KPa

Explanation:

From the question given above, the following data were obtained:

Initial volume (V1) 20000 L

Initial pressure (P1) = 748 kPa

Initial temperature (T1) = 525 K

New temperature (T2) = 293 K

New volume (V2) = 110000 L

New pressure (P2) =?

The new pressure pressure of the gas can be obtained by using the general gas formula as illustrated below:

P1V1 / T1 = P2V2 / T2

748 × 20000 / 525 = P2 × 110000 / 293

14960000 / 525 = P2 × 110000 / 293

Cross multiply

P2 × 110000 × 525 = 14960000 × 293

P2 × 57750000 = 4383280000

Divide both side by 57750000

P2 = 4383280000 / 57750000

P2 = 75.9 KPa

Thus, the new pressure of the gas is 75.9 KPa

Krypton, Chromium, and Oxygen with the following symbols Kr-13, Cr-2, and O-15 respectively have 23 electrons.

The atomic number of an atom determines the number of electrons it has. When the number of protons is equivalent to the number of electrons, the atom is electrically neutral. An anion, on the other hand, is an atom with a negative charge. It has gained an electron or two, or even more. Below are the chemical symbols for three different atoms or atomic anions with 23 electrons.Krypton:Kr has an atomic number of 36, indicating that it has 36 electrons. However, if we add 13 electrons to it, the total number of electrons becomes 49. Krypton with 13 additional electrons becomes Kr-13, with a total of 49 electrons.Chromium:Cr has an atomic number of 24, indicating that it has 24 electrons. Adding two more electrons to it, the total number of electrons becomes 26. The atomic anion with 26 electrons is Cr-2.Oxygen:Oxygen has an atomic number of 8, indicating that it has 8 electrons. However, if we add 15 electrons to it, the total number of electrons becomes 23. Oxygen with 15 additional electrons becomes O-15, with a total of 23 electrons.

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Answer:

the answer is 64 moths are dark

I think it was arctic region?

Considering the reaction stoichiometry, the total number of moles of NO produced from 0.25 moles of O₂ is 0.2 moles.

The balanced reaction is:

4 NH₃ + 5 O₂ → 4 NO + 6 H₂O

By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:

Then you can apply the following rule of three: if by stoichiometry 5 moles of O₂ produce 4 moles of NO, 0.25 moles of O₂ will produce how many moles of NO?

\(amount of moles of NO= \frac{0.25 moles of O_{2} x4 moles of NO}{5 moles of O_{2} }\)

amount of moles of NO= 0.2 moles

Finally, the total number of moles of NO produced from 0.25 moles of O₂ is 0.2 moles.

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Answer:

The density of tin is 7.31 g/cm³.

Explanation:

Given that the formula of density is D = m/v where m represents mass and v is volume :

D = 16.52/2.26

D = 7.31 g/cm³ (3sf)

Two electrons are shared between each hydrogen atom and the carbon atom bonded to it, and four electrons are shared between the carbon atoms.

Its 2

Answer:

2 would be the amount to form a covalent bond

Answer:

Using electrons.

Explanation:

The properties of matter depend on the types of atoms that matter is made of. Matter can exist in two forms. It can be a pure substance. (ck12.org)

Atoms combine, or bond, using their electrons. When atoms from two or more different elements bond, they form a compound. (resources.finalsite.net) Atoms form chemical bonds with other atoms when there's an electrostatic attraction between them. This attraction results from the properties and characteristics of the atoms' outermost electrons, which are known as valence electrons. (wonderpolis.org)

Something like this??

Answer:

Water sweated by water from the leaf cells evaporating into the air, which pulls water and nutrients from the leaf into the air.

Answer:

E. glycogenolysis

Explanation:

Glycogenolysis is the process whereby excess glucose stored by the body in the form of glycogen is then converted back/broken down into glucose molecules to serve as a source of energy

Glucagon secretion is stimulated when blood glucose concentration decreases and is secreted by the pancreas. The liver then converts the glycogen into glucose for use by the body

A full response is that the molecule with 32.1 g of S and 32 g of O has the empirical formula SO2.

Every compound's empirical formula is the simplest whole-number ratio of all of its atom types. It could occasionally be the same as the compound's molecular formula.

By first calculating the masses of each element contained in a compound, it is possible to experimentally ascertain the complex's empirical formula. Afterward, turning each element's mass into a corresponding mole.

To determine the empirical formula of the compound, we need to find the simplest whole-number ratio of the elements in the compound.

Moles of S = mass of S / molar mass of S

Moles of S = 32.1 g / 32.06 g/mol (molar mass of S)

Moles of S = 1.001 mol

Moles of O = mass of O / molar mass of O

Moles of O = 32 g / 15.99 g/mol (molar mass of O)

Moles of O = 2.001 mol

Moles of S in simplest ratio = 1.001 mol / 1.001 mol = 1

Moles of O in simplest ratio = 2.001 mol / 1.001 mol = 2

The empirical formula of the compound is SO2.

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Answer: 32 mol HCI

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.

\(Molarity=\frac{n}{V_s}\)

where,

n = moles of solute

\(V_s\) = volume of solution in Liters

Now put all the given values in the formula of molarity, we get

\(4.0M=\frac{moles}{8.0L}\)

\(moles={4.0M\times 8.0L}=32mol\)

Therefore, the moles of HCI needed to prepare 8.0 liters of a 4.0 M solution of HCI are 32.

Title: The First Amendment: Safeguarding Fundamental Freedoms

While all amendments are crucial, the First Amendment holds unparalleled significance in upholding the principles of liberty, equality, and democracy.

The First Amendment to the U.S. Constitution is undoubtedly the most important amendment as it safeguards fundamental freedoms that form the bedrock of a democratic society.

This amendment, which encompasses the rights of freedom of speech, religion, press, assembly, and petition, plays a vital role in protecting individual liberties and ensuring a just and inclusive society. There are three key reasons why the First Amendment stands out as the cornerstone of our democracy.

Firstly, freedom of speech allows citizens to express their ideas, opinions, and criticisms, fostering a robust marketplace of ideas essential for progress and social change. This right empowers individuals to challenge authority, hold public officials accountable, and engage in meaningful dialogue that drives societal progress.

Secondly, freedom of religion guarantees individuals the right to practice their faith without interference from the state. This principle promotes religious tolerance, diversity, and pluralism, creating a society where individuals can freely worship and live in accordance with their beliefs.

Lastly, freedom of the press ensures an informed citizenry by safeguarding independent journalism. A free press acts as a check on governmental power, exposes corruption, and provides essential information necessary for a functioning democracy.

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