A 41.81 g sample of a substance is initially at 20.2 °C. After absorbing 1375 J of heat, the temperature of the substance is
184.6 °C. What is the specific heat (c) of the substance?

Record the value. Also, determine whether the pH stayed the same, became more acidic, or became more alkaline compared to the first test.

Alkaline water has a higher pH level than that of plain tap water. So proponents say that it can neutralize acid in your bloodstream. Some say that alkaline water can help prevent disease, such as cancer and heart disease.

Most fruits and vegetables, soybeans and tofu, and some nuts, seeds, and legumes are alkaline-promoting foods, so they're fair game. Dairy, eggs, meat, most grains, and processed foods, like canned and packaged snacks and convenience foods, fall on the acid side and are not allowed.

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Answer:

a table of the chemical elements arranged in order of atomic number, usually in rows, so that elements with similar atomic structure (and hence similar chemical properties) appear in vertical columns.

Answer:

4 millllllermeeters jb

Answer:

\(\boxed {\boxed {\sf 1.5935 \ mol \ FeCl_}}\)

Explanation:

To convert from grams to moles, we must use the molar mass. This can be found on the Periodic Table. First, find the molar mass of iron and chlorine.

Check the formula. There is a subscript of 3 after Cl, so there are 3 atoms of chlorine in 1 molecule. Multiply iron's molar mass by 3, then add iron's molar mass.

Use this number as a ratio.

\(\frac {162.19 \ g\ FeCl_3}{1 \ mol \ FeCl_3}\)

Multiply by the given number of grams.

\(258.45 \ g \ FeCl_3 *\frac {162.19 \ g\ FeCl_3}{1 \ mol \ FeCl_3}\)

Flip the ratio so the grams of iron (III) chloride cancel.

\(258.45 \ g \ FeCl_3 *\frac {1 \ mol \ FeCl_3}{162.19 \ g\ FeCl_3}\)

\(258.45 *\frac {1 \ mol \ FeCl_3}{162.19}\)

\(\frac {258.45 \ mol \ FeCl_3}{162.19}\)

\(1.59350144892 \ mol \ FeCl_3\)

The original measurement of grams has 5 significant figures, so our answer must have the same. For the number we calculated, that is the ten thousandth place.

\(1.5935 \ mol \ FeCl_3\)

258.45 grams is approximately 1.5935 moles of iron (III) chloride.

Answer:

it's 4-methyl pentane

B. 2-methylpentane is the correct answer

Hence Option B is correct and rest are incorrect

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The correct option is both 1and 2, oxidation takes place at the anode of the galvanic cells and it also the source of electrons in current flow.

Oxidation process happens at the anode, and reduction process happens at the cathode. The anode is the negative terminal for the galvanic cell because the reaction at the anode is the source of the electrons for current.

The movement of electrons from one substance to another is what propels the process. Thermodynamics is in favor of this. The completion of the circuit in a galvanic cell or battery creates a pathway for the substance at the anode (oxidation) to transfer electrons to the substance at the cathode through the circuit (reduction).

A galvanic cell is a type of electrochemical device that generates an electric current by transferring electrons during the redox processes.

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Answer:

C₂₁H₁₅N₉O₁₈

Explanation:

Molecular formula is the ratio of atoms that are present in 1 molecule of the compound. We need to find moles of all atoms to find this ratio.

In a basis of 100, moles of C and O are:

Moles C:

37.0 * (1mol / 12g) = 3.083 moles C

Moles O:

42.5g * (1mol / 16) = 2.656 moles O

Now, to find moles of H, we need determine moles of H2O produced:

0.0310g H2O * (1mol / 18g) = 1.72x10⁻³ moles H2O * 2 = 3.44x10⁻³ moles H

These moles were produced when 0.157g of the compound react. In a basis of 100g:

3.44x10⁻³ moles H * (100g / 0.157g) = 2.194 moles H

In the same way, moles of N are:

0.0230g NH3 * (1mol / 17g) = 1.35x10⁻³ moles H2O

These moles were produced when 0.103g of the compound react. In a basis of 100g:

1.35x10⁻³ moles H * (100g / 0.103g) = 1.313 moles N

Empirical formula is (The simplest whole number ratio of atoms presents in a molecule). Dividing in the low number of moles (Moles N):

C: 3.083 moles C / 1.313 moles N = 2.3

O: 2.656 moles O / 1.313 moles N = 2.0

N: 1.313 moles N / 1.313 moles N = 1

H: 2.194 moles H / 1.313 moles N = 1.67

This ratio times 3 (To have the whole number ratio):

C: 7

O: 6

N: 3

H: 5

The empirical formula is:

C₇H₅N₃O₆

And weighs:

C: 7*(12g/mol)= 84

H: 5 * (1g/mol) = 5

N: 3 * (14g/mol) = 42

O: 6* (16g/mol) = 96

227g/mol

As the molecular mass of the compound is 681g/mol:

681 / 227 = 3

The empirical formula times 3 is the molecular formula, that is:

C₇H₅N₃O₆ × 3

The mass of water that can be obtained is 2.2 g of water.

We know that in the case that we have here, we are going to depend on the stoichiometry of the reaction and this is very important in the determination of the amount of the water that can be formed.

Now we can see that the reaction equation can be written from the fact that; \(2H_{2} (g) + O_{2} (g) ---- > 2H_{2} O(g)\). Then we can see that in this kind of chemical reaction we have to apply the stoichiometry.

Number of moles of the hydrogen = 14.8g/2 g/mol = 7.4 moles

Number of moles of oxygen = 34.8 g/32 g/mol = 1.1 moles

Given that 2 moles of hydrogen reacts with 1 mole of oxygen

7.4 moles of hydrogen reacts with 7.4 * 1/2

= 3.7 moles

Hence oxygen is the limiting reactant.

1 mole of oxygen produces 2 moles of water

1.1 moles of oxygen would produce 1.1 * 2/1

= 2.2 moles of water

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Ionic bonds are bonds that occur due to the handover of electrons to form positive ions and negative ions whose electron configuration is the same as that of the noble gasses.

Chemical bonds are the forces that hold atoms in elements and compounds together. Chemical bonds can occur with several types of bonds.

Based on the electron configuration that occurs in bond formation, chemical bonds are divided into 4 types:

1. Ionic or electrovalent bonds

This bond occurs because of the electrostatic attraction between positive ions and negative ions in a chemical compound

2. Covalent bonds

Covalent bonds occur when the sharing of electron pairs from each of the bonding atoms.

3. Coordinate covalent bond

Coordinate covalent bond is a bond that uses a shared pair of electrons, but the electrons only come from one of the atoms.

4. Metallic bond

This bond is formed due to the attractive force of the metal atomic nucleus with a sea of electrons.

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Answer:

B. the number of protons added to the number of neutrons in the nucleus.

Explanation:

Sana makatulong

Answer:

omg that song l0wkey but high.key slaps

can you not please? this is an education website

I would perfer to prefer to live my dream forever because I wouldn't let someone be stuck with my dream forever because I would rather tourture my self other than to toutour everybody else.

I would rather let everyone else live their dream, because living a dream forever after a certain point would get boring, no matter how fun it seems. Additionally, just because I sacrifice me having my dream doesn't mean I wouldn't be able to enjoy life. It just means that I wouldn't be able to live out my best scenario.

Considering the ideal gas law, an amount of moles of 0.037 moles of SO₂ were produced using the given conditions.

An ideal gas is defined as one in which all collisions between atoms or molecules are perfectly elastic and in which there are no intermolecular attractive forces, so they do not interact with each other, and do not occupy volume.

The pressure, P, the temperature, T, and the volume, V, of an ideal gas, are related by a simple formula called the ideal gas law:

P×V = n×R×T

where:

In this case, you know:

Replacing  in the ideal gas law:

1.05263 atm× 0.87 L = n× 0.082 (atmL)÷(molK)× 298 K

Solving:

n= [1.05263 atm× 0.87 L]÷ [0.082 (atmL)÷(molK)× 298 K]

n= 0.037 moles

Finally, there are 0.037 moles of SO₂.

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The observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.

From the observation that the hole in the window is smaller on the outside than on the inside, Becca, as a forensic technician, might deduce the following:

The hole was caused by an impact from the outside: The smaller outside hole suggests that the force that created the hole originated from the outside and exerted more pressure on the window surface facing inward.

The object causing the hole was larger on the inside: The discrepancy in hole sizes implies that the object that struck the window had a larger size or diameter on the inside, and as it penetrated the glass, it compressed or fragmented the glass, resulting in a larger hole on the inside.

The object may have passed through the window: The difference in hole sizes indicates that the object may have penetrated the window, potentially passing through to the inside. This could suggest a break-in or an incident involving the window being struck from the outside.

Overall, the observation of a smaller outside hole than inside leads Becca to infer that an impact from the outside caused the hole, with a larger object striking and passing through the window from the inside.

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Two molecules having different sizes but the same functional groups will take part in chemical reactions. Functional groups are used in the field of organic chemistry. Here the given molecule has ketone functional group. The correct option is D.

The substituent atoms or groups of atoms which are attached to specific molecules are defined as the functional groups. These moieties are responsible for the chemical reactions. The same functional group will experience comparable reactions regardless of the chemical in which it is present.

A ketone is a functional group which consists of a carbonyl carbon bound to an oxygen atom by a double bond and two alkyl or aryl groups. Ketones are usually represented as RCOR, where two R's can be any alkyl or aryl group. Their general formula is CₙH₂ₙO.

Lower ketones are soluble in water because they consist of the polar carbonyl group.

Thus the correct option is D.

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Answer:

............................................................................................................................

Explanation:

because ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................

Answer:

orbital shape.

Explanation:

1) There are four quantum numbers to describe the electrons. These are:

i) Principal quantum number (n)

ii) Azimuthal quantum number (ℓ), also called angular momentum quantum number.

iii) Magnetic quantum number (m)

iv) Spin quantum number (s)

2) The principal quantum number tells the main energy level. It can be 1, 2, 3, 4, 5, 6, 7. It is related to the orbital size. 1 is a small orbital, 7 is a big orbital.

2) The Azimuthal quantum number (ℓ) or angular momentum quantum number may be a number between 0 and n - 1.

It tells the kind of orbital, which is its shape

The correspondence is:

0 = s orbital,

1 = p orbital,

2 = d orbital,

3 = f orbital.

3) Magnetic quantum number (m) tells the orientation. It can be from - ℓ to + ℓ

For example when ℓ = 1, the orbital is p, and the magnetic quantum number may be -1, 0, or +1, which corresponds to px, py, pz: the orientation of the p orbital in the space.

4) Spin quantum number (s) can be either +1/2 or -1/2.

JM~ Hope this helps you out

Answer:

Example 1

palladium(II) nitrate,

Example 2

Metal catalysts such as Fe, Ni, Mo, and Co are routinely used in the manufacture of CNMs.

Explanation

The three metals used in catalytic converters — rhodium, platinum and palladium — are part of a category known as platinum group metals, or PGMs, which are known for their catalytic properties.

Answer:

0.005712

Explanation:

5.712 grams = 0.005712 kilograms

Answer:

It would be 0.005712

Explanation:

Answer:

Changing states of matter occur when matter loses or absorbs energy. When a substance absorbs energy the atoms and molecules move more rapidly and this increased kinetic energy pushes particles far enough, that they change form. This energy is usually heat or thermal energy.

Explanation:

Scale may not be practical to represent objects in space because, scales sometimes impede proper communication of the actual nature of gthe objects.

A scale is used in the representation of an object in a manner that is smaller than the actual object. A scale is often employed to save space and  yet convey the required information.

For objects in space, scales sometimes impede proper communication of the actual nature of the object that is to be represented. Hence, it is sometimes not practical to use scales to represent objects in space.

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1. The balanced chemical equation for the reaction is:

PCl₃ + Cl₂ → PCl

From the equation, the stoichiometric ratio between PCl₃ and Cl₂ is 1:1. This means that for every 1 mole of PCl₃, 1 mole of Cl₂ is needed to completely react.

Given that we have 5.40 moles of PCl₃, we can conclude that we also need 5.40 moles of Cl₂ to completely react.

Therefore, 5.40 moles of chlorine gas are needed to completely react with 5.40 moles of PCl₃ in the reaction.

2. To calculate the number of grams of NO₂ produced, we need to determine the molar mass of N₂O and the stoichiometry of the reaction.

The molar mass of N₂O can be calculated as follows:

N₂O:

N = 2 atoms of nitrogen

O = 1 atom of oxygen

The molar mass of nitrogen (N) = 14.01 g/mol

The molar mass of oxygen (O) = 16.00 g/mol

Molar mass of N₂O = (2 * 14.01 g/mol) + (1 * 16.00 g/mol) = 44.02 g/mol

Now, we need to determine the stoichiometry of the reaction to find the mole ratio between N₂O and NO₂.

From the balanced equation:

N₂O(g) + O₂(g) → 2 NO₂(g)

According to the balanced equation, 1 mole of N₂O reacts to produce 2 moles of NO₂.

Now, let's calculate the number of moles of N₂O using its molar mass:

Moles of N₂O = mass of N₂O / molar mass of N₂O

Moles of N₂O = 315.0 g / 44.02 g/mol

Moles of N₂O ≈ 7.14 mol

Since the stoichiometric ratio between N₂O and NO₂ is 1:2, we can determine the number of moles of NO₂ produced:

Moles of NO₂ = 2 * moles of N₂O

Moles of NO₂ = 2 * 7.14 mol

Moles of NO₂ ≈ 14.28 mol

Finally, we can calculate the mass of NO₂ produced using its molar mass:

Mass of NO₂ = moles of NO₂ * molar mass of NO₂

Mass of NO₂ = 14.28 mol * (46.01 g/mol)  (molar mass of NO₂)

Mass of NO₂ ≈ 657.42 g

Therefore, approximately 657.42 grams of NO₂ are produced when 315.0 grams of N₂O reacts with excess oxygen gas.

3.

A. Acid - [H+] < [OH-]

B. Acid - pH = 2.4

C. Acid - [H+]= 1.0 x 10⁻¹³ M

D. Acid - red litmus paper stays red

E. Neutral there is no reaction with the metal

F. Acid Hydrogen ion donor

G. Base feels slippery

H. Acid and Base conduct electricity

I. Base hydrogen ion acceptor

J. Acid HCI

K. Acid blue litmus paper turns red

4.

A. Conjugate acid-base pairs:

   Acid: H₂SO₄

   Base: OH-

Conjugate acid: HSO₄-

Conjugate base: H₂O

B. Conjugate acid-base pairs:

Acid: H₃O+

Base: OH

Conjugate acid: H₃O+

Conjugate base: H₂O

5. The balanced equation for the reaction is:

3Sb₂S₃(s) + 6Fe(s) → 2Sb(s) + 6FeS(s)

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Answer:

The speed of molecules in a gas is directly proportional to the square root of the temperature and inversely proportional to the square root of the molar mass.

Since both gases are at the same temperature, we only need to compare their molar masses.

The molar mass of carbon dioxide (CO2) is 44 g/mol and the molar mass of hydrogen (H2) is 2 g/mol.

Therefore, the square root of the molar mass of hydrogen is smaller than the square root of the molar mass of carbon dioxide.

This means that the speed of hydrogen molecules is greater than the speed of carbon dioxide molecules at the same temperature.

Answer:

The compound which doesn't contains ionic character is HC, H-atom and CL- atom shares 1 electron a to form covalent bond....

Li₃PO₄ + 3 Zn(NO₃)₂ → 3 LiNO₃ + Zn₃(PO₄)₂. In this balanced equation, one of the products is Zn₃(PO₄)₂. To ensure that the equation is balanced, we need 3 moles of Zn(NO₃)₂ for every 1 mole of Li₃PO₄.

In a chemical reaction, a product is a substance that is formed as a result of the chemical reaction. It is the end result of a chemical reaction, and it is produced by the rearrangement of atoms and/or ions of the reactants.

In the given equation, we end up with 1 mole of Zn₃(PO₄)₂ for every 3 moles of Zn₃(PO₄)₂. This means that the molar ratio of Zn₃(PO₄)₂ to Zn₃(PO₄)₂ is 1:3, indicating that we need three times as much Zn₃(PO₄)₂ as Zn₃(PO₄)₂ to balance the equation. Therefore, one of the products, Zn₃(PO₄)₂, must be produced in a smaller quantity than the other product, LiNO₃.

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Answer:

b. I've seen a question like this before lol

Answer:

B

Explanation:

The molecules in a gas are very far apart compared with the molecules in a solid or a liquid. The amount of space between the molecules in a gas can change easily.

The amount of work that has been done by the man would be =1,102.5Nm

To calculate the amount of work that was done by the man, the formula that should be used would be given below as follows:

Work done = Force × distance

But force = mass × acceleration

mass = 75kg

acceleration = 9.8m/s²

Force = 75×9.8 =735N

Work done = 735× 1.5 = 1,102.5Nm

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