Balance these equations
•Zn+HCl >> ZnCl2 + H2
•S8 + F2 >> SF8​

Answer:

One atom lf helium has a mass of 4 u

Know that 1 u =1.66. 10-24g

Explanation:

We are given different isotopes and we have to identify the number of protons and neutrons that are in the nuclueus of each atom.

a) Carbon-14:

By definition two isotopes are atoms that have the same atomic number but different mass number. The atomic number of an atom is equal to the number of protons of that atom, and the mass number is equal to the number of protons plus the number of neutrons.

atomic number = n° of protons

mass number = n° of protons + n° of neutrons

n° of protons = atomic number

n° of neutrons = mass number - n° of protons

n° of neutrons = mass number - atomic number

If two isotopes have the same atomic number but different mass number we can say that two isotopes have the same number of protons but different number of neutrons.

In we pay attention to carbon-14 we can look for its atomic number in the period table: 6. And its mass number is the one that we are given after the name of the element: 14.

n° of protons = atomic number = 6

n° of protons = 6

n° of neutrons = mass number - atomic number = 14 - 6

n° of neutrons = 8

b) Cobalt-60:

atomic number = 27 (from the periodic table)

mass number = 60

n° of protons = atomic number = 27

n° of protons = 27

n° of neutrons = mass number - atomic number = 60 - 27

n° of neutrons = 33

c) Gold-197:

atomic number = 79 (from the periodic table)

mass number = 197

n° of protons = atomic number = 79

n° of protons = 79

n° of neutrons = mass number - atomic number = 197 - 79

n° of neutrons = 118

d) Uranium-235:

atomic number = 92 (from the periodic table)

mass number = 235

n° of protons = atomic number = 92

n° of protons = 92

n° of neutrons = mass number - atomic number = 235 - 92

n° of neutrons = 143

Answer:

a) Carbon-14: n° of protons = 6 n° of neutrons = 8

b) Cobalt-60: n° of protons = 27 n° of neutrons = 33

c) Gold-197: n° of protons = 79 n° of neutrons = 118

d) Uranium-235: n° of protons = 92 n° of neutrons = 143

Answer:

A

Explanation:

I looked up aromatic hydrocarbon and this one looks like a replica of benzene

Answer:

Dipole-dipole

- are the strongest intermolecular force of attraction.

Explanation:

Yun lang <3

Answer:

oxygen obey the octet rule when reacting to form compounds by adding 2 electrons.

Explanation:

Answer:

See below.

Explanation:

An oxygen atom, in free state has 8 electrons, 2 in the first shell, and 6 in the second. It can only achieve stability if the valency of the valence shell is 0. In order for this, it combines with another atom with the same valency, such as magnesium or another oxygen atom to obey the octet rule. Hope it helps.

If 1-bromoadamantane was solvolyzed in 30% ethanol as opposed to 40% ethanol, the process would be slower.

A renewable fuel called ethanol is produced form corn or other plant components. The United States uses ethanol extensively, and far more than 98% of fuel contains some ethanol. E10, which contains 10% ethanol and 90% gasoline, is the most popular ethanol blend.

Over 2 billion people use ethanol (also known as ethyl alcohol) day after day. Yeast, sugars, mixed starches are fermented to create this kind of alcohol. People have been using ethanol-based beverages like beer and wine for generations to alter their mood.

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Answer:

The atomic number or proton number (symbol Z) of a chemical element is the number of protons found in the nucleus of every atom of that element. The atomic number uniquely identifies a chemical element. ... The sum of the atomic number Z and the number of neutrons N gives the mass number A of an atom.

Answer:

Atoms of each element contain a characteristic number of protons. In fact, the number of protons determines what atom we are looking at (e.g., all atoms with six protons are carbon atoms); the number of protons in an atom is called the atomic number.

Explanation:

Answer:

1. Potassium, K.

2. Calcium, Ca.

3. Gallium, Ga.

4. Carbon, C.

5. Bromine, Br.

6. Barium, Ba.

7. Silicon, Si.

8. Gold, Au.

Explanation:

Atomic radius can be defined as a measure of the size (distance) of the atom of a chemical element such as hydrogen, oxygen, carbon, nitrogen etc, typically from the nucleus to the valence electrons. The atomic radius of a chemical element decreases across the periodic table, typically from alkali metals (group one elements such as hydrogen, lithium and sodium) to noble gases (group eight elements such as argon, helium and neon). Also, the atomic radius of a chemical element increases down each group of the periodic table, typically from top to bottom (column).

Additionally, the unit of measurement of the atomic radius of chemical elements is picometers (1 pm = 10 - 12 m).

1. Li or K: the atomic radius of lithium is 167 pm while that of potassium is 243 pm.

2. Ca or Ni: the atomic radius of calcium is 194 pm while that of nickel is 149 pm.

3. Ga or B: the atomic radius of gallium is 136 pm while that of boron is 87 pm.

4. O or C: the atomic radius of oxygen is 48 pm while that of carbon is 67 pm.

5. Cl or Br: the atomic radius of chlorine is 79 pm while that of bromine is 94 pm.

6. Be or Ba: the atomic radius of berryllium is 112 pm while that of barium is 253 pm.

7. Si or S: the atomic radius of silicon is 111 pm while that of sulphur is 88 pm.

8. Fe or Au: the atomic radius of iron is 156 pm while that of gold is 174 pm.

The atoms in each pair which has the larger atomic radius is;

Definition:

Atomic radius is simply the distance from the centre of the nucleus to the outermost shell containing electrons.

In other words, the atomic radius is the distance from the center of the nucleus to the point up to which the electron cloud density is maximum.

Trend:

The atomic radius of atoms generally decreases from left to right across a period. The atomic radius of atoms generally increases from top to bottom within a group.

It is on this basis that atoms with the larger atomic radius are determined

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Answer: just want points

Explanation: POINTS!! ;)

Answer: Cu is oxidized while Au is reduced. The oxidizing agent is Au while the reducing agent is Cu

Answer:

Both blanks are "Ag"

(:

Explanation:

The pressure exerted by the neon gas, when the volume is increased from 7.2 mL to 28.8 mL at constant temperature, can be calculated using Boyle's Law. The pressure exerted by the neon gas, when the volume is increased to 28.8 mL at constant temperature, is 0.375 atm.

Boyle's Law states that at constant temperature, the product of the pressure and volume of a gas remains constant. Mathematically, it can be expressed as P₁V₁ = P₂V₂. This law allows us to calculate the change in pressure when the volume changes.

In this case, the initial volume (V₁) is given as 7.2 mL, and the initial pressure (P₁) is 1.5 atm. The final volume (V₂) is 28.8 mL. By substituting these values into Boyle's Law equation, we can solve for the final pressure (P₂).

When we perform the calculations, we find that the pressure exerted by the neon gas, when the volume is increased to 28.8 mL, is 0.375 atm. As the volume increases, the pressure decreases due to the inverse relationship between pressure and volume.

Using Boyle's Law: P₁V₁ = P₂V₂

Given:

Initial volume (V₁) = 7.2 mL

Initial pressure (P₁) = 1.5 atm

Final volume (V₂) = 28.8 mL

To find the final pressure (P₂):

P₂ = (P₁ * V₁) / V₂

  = (1.5 atm * 7.2 mL) / 28.8 mL

  = 0.375 atm

Therefore, the pressure exerted by the neon gas, when the volume is increased to 28.8 mL at constant temperature, is 0.375 atm.

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Answer:

you can tell diorite is an intrusive igneous rock because it has a coarse-grained texture

Answer:

Explanation:

Example for Endothermic include melting ice cubes, cooking eggs, or baking breads.

Example for Exothermic include Burning candles, lighting match, or hot packs

Answer:

The answer is A

Explanation:

Eugenol can also be isolated from cloves using extraction with carbon dioxide:

Distillation: High purity, simplicity; challenges with temperature and separation efficiency.

Carbon dioxide extraction: Mild extraction, selectivity; higher equipment cost and complexity. Choice depends on purity and heat sensitivity.

1. High Purity: Distillation is a well-established technique for separating compounds based on their boiling points. It allows for the isolation of eugenol with high purity, as it vaporizes at a specific temperature and can be condensed back into a liquid.

2. Simple Process: Distillation is a relatively straightforward process that requires basic equipment and can be easily scaled up for industrial production. It is a commonly used method in the chemical industry, making it accessible and widely applicable.

1. Temperature Sensitivity: Distillation relies on heating the mixture to vaporize the desired compound. However, eugenol is sensitive to high temperatures and can be easily degraded or oxidized during the distillation process, leading to a loss of yield or degradation of the compound.

2. Separation Efficiency: Distillation is effective for separating compounds with significantly different boiling points. However, if there are other compounds present in the cloves extract with boiling points close to eugenol, achieving a complete separation becomes challenging. This can result in impurities in the final product.

1. Mild Extraction Conditions: Carbon dioxide extraction, also known as supercritical fluid extraction, can be performed at relatively low temperatures and pressures compared to distillation. This gentle extraction process helps preserve the integrity and quality of heat-sensitive compounds like eugenol.

2. Selectivity: Carbon dioxide extraction allows for selective extraction of specific compounds. By adjusting the temperature and pressure, it is possible to optimize the extraction of eugenol while minimizing the extraction of unwanted compounds from the cloves. This can result in a higher purity of eugenol in the extracted product.

1. Equipment and Cost: Carbon dioxide extraction requires specialized equipment capable of maintaining specific temperature and pressure conditions. This can make the setup more expensive compared to distillation. Additionally, the extraction process may take longer, resulting in increased production time and cost.

2. Complex Process: Carbon dioxide extraction is a more complex process compared to distillation. It involves handling high-pressure systems and requires a good understanding of the extraction parameters to achieve optimal results. This complexity may require more expertise and training to operate effectively.

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Answer:

1. 34.25

2.716

3.0.02181

4.1,323.194921978313 round use calculator

5.9.89

6.90 or 91

7.0.0269

Explanation:

Round if you can

Answer:

i think A.

Explanation:

Answer:

Egg is heterogeneous.

Ranch Dressing is heterogeneous

Windex is homogeneous.

From the collected three samples from the coral reef we can conclude that:

SAMPLE A - pure substance.

SAMPLE B - homogeneous mixture.

SAMPLE C - heterogeneous mixture.

Pure substances and mixtures are the two broad categories into which matter can be divided.

A sort of matter known as a pure substance has qualities that are constant throughout the sample and a stable composition that makes it the same everywhere (meaning that there is only one set of properties such as melting point, color, boiling point, etc. throughout the matter).

A mixture is said to be homogenous if its composition is constant throughout. Because the dissolved salt is evenly distributed throughout the whole salt water sample, the salt water described above is homogenous.

A combination is said to be heterogeneous if its composition is not constant throughout. Vegetable soup is a complex concoction. Each mouthful of soup will have differing percentages of the various veggies and other ingredients.

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Answer:

The question is incomplete, the complete question is:

A certain substance X has a normal freezing point of  and a molal freezing point depression constant . A solution is prepared by dissolving some glycine in 950. g of X. This solution freezes at  . Calculate the mass of urea that was dissolved. Round your answer to 2 significant digits.

Answer: The mass of glycine that can be dissolved is

Explanation:

Depression in the freezing point is defined as the difference between the freezing point of the pure solvent and the freezing point of the solution.

The expression for the calculation of depression in freezing point is:

OR

          ......(1)

where,

Freezing point of pure solvent =

Freezing point of solution =

i = Vant Hoff factor = 1 (for non-electrolytes)

= freezing point depression constant =

= Given mass of solute (glycine) = ?

= Molar mass of solute (glycine) = 75.07 g/mol

= Mass of solvent = 950. g

Putting values in equation 1, we get:

Hence, the mass of glycine that can be dissolved is

I think its nitrogen, im not sure tho

Answer:

Na and Cl

Explanation:

An ionic compound is solid at state room temperature. Therefore Na and Cl would be the correct answer :)

Answer:

c

Explanation:

because when you crush an ice it  would break into peace's and the ice would not be a solid

1. A neutron outside a nucleus decays into a proton, electron, and antineutrino: This process is known as beta decay, and it is governed by the weak nuclear force. The weak nuclear force is responsible for interactions involving particles that undergo radioactive decay, such as the transformation of a neutron into a proton.

2. Protons and neutrons attract each other in a nucleus: This is the result of the strong nuclear force, also known as the strong interaction. The strong force is responsible for binding protons and neutrons together within the atomic nucleus. It overcomes the electromagnetic repulsion between positively charged protons and holds the nucleus together.

3. The Earth pulls on the Moon: This is an example of gravitational interaction. Gravity is responsible for the attractive force between objects with mass. In this case, the Earth's gravitational pull is responsible for the Moon orbiting around it.

4. Protons in a nucleus repel each other: This is due to the electromagnetic force, which is responsible for interactions between charged particles. Protons, being positively charged, repel each other due to the electromagnetic repulsion. It is the electromagnetic force that prevents the nucleus from collapsing under the repulsive forces between protons.

Understanding the fundamental interactions helps us explain the behavior and interactions of particles at the atomic and subatomic level, providing insights into various natural phenomena and the structure of matter.

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Match the process with the fundamental interaction responsible for this process. - Protons in a nucleus repel each other. -The Earth pulls on the Moon. -Protons and neutrons attract each other in a nucleus. -A neutron outside a nucleus decays into a proton, electron, and antineutrino. with these : 1- The electromagnetic interaction 2- the gravitational interaction 3- The weak interaction 4- The strong interaction

assuming that the volumes of reactants and products are measured at the same temperature and pressure if 2.75l n2 reacts with 7.75l h2, 10.50 L  is the theoretical yield (in liters) of nh3

N2 + 3H2 = 2NH3, volume: 2.75 +7.75 = 10.50. volume of ammonia gas is 10.50 L because of law of conservation of mass Gas volume  the correlation among pressure, volume, moles, and temperature. is the volume that mole of a chemical substance or a combination of substances currently takes. As a result, at STP, this same mole ratio volume of a gas is 22.4 litres. A gas's volume refers to the amount of three - dimensional space that the gas occupies. The volume of a gas embedded in a sealed jar is identical to the volume of the container. A system's volume is a critical comprehensive criterion for trying to describe its thermodynamic state. The volume, an intensive estate, is the volume of the system per unit mass.

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Baking powders contain at least two active ingredients: a base and an acid. Baking soda (sodium bicarbonate) is responsible for the production of carbon dioxide (CO2) gas during baking.

Baking powders typically contain at least two active ingredients: a base and an acid. The base is usually baking soda (sodium bicarbonate), and the acid can be cream of tartar (potassium bitartrate), sodium acid pyrophosphate, or a combination of acids.

Among these ingredients, baking soda (sodium bicarbonate) is primarily responsible for the production of carbon dioxide (CO2) gas. When baking soda reacts with the acid in the presence of moisture, it undergoes a chemical reaction called acid-base reaction or neutralization reaction. This reaction produces carbon dioxide gas, which creates bubbles and causes the dough or batter to rise. The release of carbon dioxide gas during baking gives the baked goods their characteristic texture and lightness.

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Answer:  there are 10 electrons associated with a single Al3+ ion.

Explanation: