If a compound with a density of 9.0 g/cm^3 occupies 37.6 in^3, what is its mass in kg?
2.54 cm = 1 in

Answer: All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.

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Explanation:

Answer:

A. on the reactant side

Explanation:

A catalyst will appear in the steps of a reaction mechanism, but it will not appear in the overall chemical reaction

Answer:

B. PROTONS EXHIBIT STRONGER PULL ON OUTER f ORBITALS

Explanation:

Lanthanide contraction is the greater than normal decrease in the ionic radius of the lanthanide series from atomic number 57 to atomic number 71. This decrease is rather not expected of the ionic radii of these elements and they result in the greater decrease in the subsequent series of the lanthanides from the atomic number 72. The cause of which is as a result of the poor shielding effects of the nuclear charge around the electrons of the f orbitals. So therefore, protons are strongly pulled out of the 4f orbital and as a result of the poor shielding effect which causes the electrons of the 6s orbitals to be drawn more closer to the nucleus and hence resulting in a smaller atomic radii. It is worthy to note that the shielding effects of the inner electrons decreasing from s orbital to the f orbital; that is s > p > d > f. So from the decrease in the shielding effects from s to the f orbitals, lanthanide contraction results from the inability of the orbitals far away from s like the 4f orbiatls to shield the outermost shells of the lanthanide elements. So the cause of lanthanide contraction is the action of the protons which strongly pull the electrons of the f orbitals because of the poor shielding effects due to the distance of this orbital from the nucleus.

Answer:

B) Protons exhibit a stronger pull on outer f orbitals than on d orbitals.

Explanation:

The growth of the new plant depicts the asexual reproduction characteristic. The characteristic that describes the growth of the new plant in Stephan's mother cutting a twig from a rose bush and planting it in the soil is asexual reproduction.

Asexual reproduction is the mode of reproduction by which organisms generate offspring that are identical to the parent's without the fusion of gametes. Asexual reproduction is a type of reproduction in which the offspring is produced from a single parent.

The offspring created are clones of the parent plant, meaning they are identical to the parent.The new plant in Stephan’s mother cutting a twig from a rose bush and planting it in the soil depicts the process of asexual reproduction, which is the ability of a plant to reproduce without seeds. In asexual reproduction, plants can reproduce vegetatively by cloning themselves using their roots, bulbs, or stems.

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Answer:

it would be c

Explanation:

because its easy to apply force on a ramp moving upwards

The moss life cycle goes like this:

Gametophytes form male and female gamete which fuse to form the sporophytes, spores are released from the sporophyte to produce new gametophytes.

Answer:

MgO

Explanation:

The following data were obtained from the question:

mass of crucible and cover + magnesium metal = 33.741 g

mass of crucible and cover = 33.5 g

mass of crucible and cover + magnesium oxide = 33.899 g

Next, we shall determine the mass of magnesium metal. This can be obtained as follow:

mass of crucible and cover + magnesium metal = 33.741 g

mass of crucible and cover = 33.5 g

Mass of magnesium metal =..?

Mass of magnesium metal = (mass of crucible and cover + magnesium metal) – (mass of crucible and cover)

Mass of magnesium metal = 33.741 – 33.5

Mass of magnesium metal = 0.241g

Next, we shall determine the mass of magnesium oxide. This can be obtained as follow:

mass of crucible and cover + magnesium oxide = 33.899 g

mass of crucible and cover = 33.5 g

Mass of magnesium oxide =?

Mass of magnesium oxide = (mass of crucible and cover + magnesium oxide) – (mass of crucible and cover)

Mass of magnesium oxide = 33.899 –. 33.5

Mass of magnesium oxide = 0.399g

Next, we shall determine the mass of oxygen. This can be obtained as follow:

Mass of magnesium oxide = 0.399g

Mass of magnesium metal = 0.241g

Mass of oxygen =..?

Mass of oxygen = (Mass of magnesium oxide) – (Mass of magnesium metal)

Mass of oxygen = 0.399 – 0241

Mass of oxygen = 0.158g

Now, we can obtain the empirical formula for the magnesium oxide as follow:

Mg = 0.241g

O = 0.158g

Divide by their molar mass

Mg = 0.241 / 24 = 0.01

O = 0.158 / 16 = 0.0099

Divide by the smallest

Mg = 0.01 / 0.0099 = 1

O = 0.0099 / 0.0099 = 1

Therefore, the empirical formula for the magnesium oxide is MgO

There are several physical methods that can be used to monitor the rate of a chemical reaction are; Spectrophotometry, Conductometry, and Turbidity measurement

Spectrophotometry involves measuring the changes in the intensity of light absorbed or transmitted by a solution during a chemical reaction. Spectrophotometers are used to measure the amount of light absorbed or transmitted by a sample at different wavelengths.

Conductometry  involves measuring the changes in electrical conductivity of a solution during a chemical reaction. Conductivity meters are used to measure the electrical conductivity of a solution, which can change as the concentration of ions in the solution changes during a chemical reaction.

Turbidity measurement involves measuring the changes in the clarity or turbidity of a solution during a chemical reaction. Turbidimeters or nephelometers can be used to measure the amount of light scattered by a sample, which can change as particles form or dissolve during a reaction.

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--The given question is incomplete, the complete question is

"What are the physical methods of monitoring the rate of a chemical reaction?"--

Answer:

the crust

Explanation:

Earth's crust is what we walk on every day. It is the thin (relatively) outermost layer that wraps around the Earth and ranges in temperature from 500 to 1,000°C. The crust is split into two types, continental and oceanic. Earth's crust is 5 to 70 km thick.

Answer:

When oceanic lithosphere and continental lithosphere collide, the dense oceanic lithosphere subducts beneath the less dense continental lithosphere.

Explanation:

Hope this helped Mark BRAINLEST!!!

Answer:

no

Explanation:

its ionic

Potential energy diagram for a combustion reaction:. CLICK ON IMAGE.

In a typical combustion reaction, the reactants (e.g. a fuel and an oxidizer) are initially at a relatively high potential energy. As the reaction proceeds, the potential energy of the system decreases, and the products (e.g. carbon dioxide and water vapor) are at a lower potential energy than the reactants. The difference in potential energy between the reactants and products corresponds to the heat released during the reaction.

The diagram shows the initial energy level of the reactants, the activation energy required to initiate the reaction, and the final energy level of the products. The activation energy is the minimum amount of energy required for the reaction to occur.

Once the reactants have absorbed enough energy to reach the activation energy threshold, the reaction proceeds spontaneously and releases energy as it progresses to the lower-energy products.

Note that the shape of the potential energy diagram can vary depending on the specific reaction and the reaction conditions. For example, some reactions may have more complex energy profiles with multiple intermediate steps or energy barriers.

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Answer:

3.72 mol Hg

General Formulas and Concepts:

Chemistry - Atomic Structure

Explanation:

Step 1: Define

D = 13.6 g/mL

54.8 mL Hg

Step 2: Identify Conversions

Molar Mass of Hg - 200.59 g/mol

Step 3: Find

13.6 g/mL = x g / 54.8 mL

x = 745.28 g Hg

Step 4: Convert

\(745.28 \ g \ Hg(\frac{1 \ mol \ Hg}{200.59 \ g \ Hg} )\) = 3.71544 mol Hg

Step 5: Check

We are given 3 sig figs. Follow sig fig rules and round.

3.71544 mol Hg ≈ 3.72 mol Hg

Answer: kinetic energy

Explanation:

Answer:

1) Oxidation-Reduction (Redox) Reaction

2) Combustion Reaction

3) Decomposition Reaction

4) Synthesis Reaction

5) Single Displacement (Substitution) Reaction

6) Double Displacement (Metathesis) Reaction

7) Acid-Base Neutralization Reaction

8) Precipitation Reaction

Here are the Answer:

1. Oxidation-Reduction (Redox) Reaction

2. Combustion Reaction

3. Decomposition Reaction

4. Synthesis Reaction

5. Single Displacement (Substitution) Reaction

6. Double Displacement (Metathesis) Reaction

7. Acid-Base Neutralization Reaction

8. Precipitation Reaction

Hope this Helped! Don't have a good day, have a GREAT DAY!

The calculated formula masses to 133.5 amu, we find that the substance with a formula mass closest to 133.5 amu is (d) AlCl3. Therefore, the answer is option D.

To identify the substance with a formula mass of 133.5 amu, we need to calculate the formula mass of each given substance and compare it to 133.5 amu.

(a) MgCl2:

The formula mass of MgCl2 can be calculated by adding the atomic masses of magnesium (Mg) and chlorine (Cl).

Mg: atomic mass = 24.31 amu

Cl: atomic mass = 35.45 amu

Formula mass of MgCl2 = (24.31 amu) + 2(35.45 amu) = 95.21 amu

(b) SCl:

The formula mass of SCl can be calculated by adding the atomic masses of sulfur (S) and chlorine (Cl).

S: atomic mass = 32.07 amu

Cl: atomic mass = 35.45 amu

Formula mass of SCl = 32.07 amu + 35.45 amu = 67.52 amu

(c) BCl:

The formula mass of BCl can be calculated by adding the atomic mass of boron (B) and chlorine (Cl).

B: atomic mass = 10.81 amu

Cl: atomic mass = 35.45 amu

Formula mass of BCl = 10.81 amu + 35.45 amu = 46.26 amu

(d) AlCl3:

The formula mass of AlCl3 can be calculated by adding the atomic mass of aluminum (Al) and 3 times the atomic mass of chlorine (Cl).

Al: atomic mass = 26.98 amu

Cl: atomic mass = 35.45 amu

Formula mass of AlCl3 = 26.98 amu + 3(35.45 amu) = 133.78 amu. Option D

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The Correct Option is :

One grey sphere, Four white spheres, and One red spheres.

For the pair of compounds CH 3 CH 2 CH 2 OH or CH 3 OH the one with the higher vapor pressure at a given temperature is?

Vapor pressure is always going to be inversely proportional to the boiling point. The low the boiling point, compound will have the higher vapor pressure.  

1. CH₃OH exhibits the  low boiling point in comparison to CH₃CH₂CH₂OH that exhibits the high boiling point. So, CH₃OH has high vapor pressure.

2. CH₃OH is polar and it  exhibits high boiling point because of hydrogen bonds, in comparison H₂CO exhibits low boiling point and has no hydrogen bonds. So, H₂CO has high vapor pressure.

3. CH₄ is non-polar solvent and exhibits less boiling point in comparison to that of CH₃Cl, which is polar and exhibits high boiling point. So, CH₄ has high vapor pressure.  

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Answer:

read and green

Explanation:

By convention, the three primary colors in additive mixing are red, green, and blue. In the absence of light of any color, the result is black. If all three primary colors of light are mixed in equal proportions, the result is neutral (gray or white). When the red and green lights mix, the result is yellow.

Answer:

ground tumeric

Explanation:

Mix 1/4 cup water and 1/2 teaspoon of ground tumeric

Answer:

Nacio, is contained in 400 grams of water whose molality ... Molality= moles of solute / mass of solvent in Kg Now molality=0.60 Mass

Explanation:

/////

Answer:

0.233m

Explanation:

c1/v1=c2/v2

c1/17.20= 0.17/12.53

hence c1= 0.17x17.2/12.53

therefore c1=0.. 233M

Explanation:

hi sorry I wasn't able to find Nz on periodic Table may be just missed it so just find mr of Nz and times it by moles hope this helps

1. Powerbars are energy bars that contain a variety of ingredients such as protein, carbohydrates, and fats. They are designed to provide a quick source of energy and nutrients for athletes and people who are physically active. While Powerbars can be a good source of nutrients for athletes, they are not a magic food that will make you stronger on their own. Strength and muscle growth are the result of a combination of factors, including regular exercise, proper nutrition, and rest. The protein in Powerbars comes from a variety of sources such as soy, whey, and casein. Protein is important for building and repairing muscle tissue, but consuming more protein than your body needs will not necessarily make you stronger. In fact, consuming excessive amounts of protein can be harmful to your health. Overall, while Powerbars can be a convenient source of energy and nutrients for athletes, they are not a substitute for a well-balanced diet and proper exercise routine.

2. Chirality refers to the property of a molecule that has a non-superimposable mirror image. This means that two molecules that are mirror images of each other cannot be overlaid onto each other. Amino acids are chiral molecules, meaning that they have two enantiomers that are non-superimposable mirror images of each other. The human body is able to metabolize the two enantiomers of a drug differently because the enzymes that break down and process the drug are also chiral. Enzymes are specific in their shape and can only bind to one enantiomer of a drug, which means that the other enantiomer is not metabolized as efficiently or may not be metabolized at all. This can result in differences in the effectiveness and side effects of the drug depending on which enantiomer is present. In the case of Albuterol, the R-enantiomer is more effective than the S-enantiomer, and a drug containing only the R-enantiomer has been developed for use in treating asthma. In the case of Ritalin, the S-enantiomer is more effective than the R-enantiomer, and a drug containing only the S-enantiomer has been developed for use in treating attention-deficit/hyperactivity disorder (ADHD). Overall, the chirality of molecules can have important implications for drug development and use, as well as for understanding the mechanisms of drug action and metabolism in the body.

Answer:

1) PowerBars are a sort of energy bar developed to give athletes and fitness enthusiasts with a quick and handy source of nourishment. PowerBar components vary depending on the product, but often include a combination of carbs, protein, and fat, as well as numerous vitamins and minerals.

carbs are the body's major source of energy during activity, and PowerBars often include a combination of basic and complex carbs to offer both fast and long-lasting energy. Protein is also necessary for muscle repair and development, and PowerBars typically provide 10-20 grammes of protein per bar.

while PowerBars can be a handy source of nutrition for athletes and may aid in muscle building and recovery when eaten as part of a well-balanced diet, they are not a quick fix for becoming stronger or faster. Strength and performance may be improved by engaging in regular exercise and following a well-rounded eating plan that includes a range of nutrient-dense meals.

2) Because of variations in how the human body metabolises and reacts to each enantiomer, one enantiomer of a medicine may be more effective than the other. Enantiomers contain the same chemical formula and functional groups as one another, but their 3D structures are mirror reflections of one another, resulting in distinct interactions with biological molecules such as enzymes, receptors, and transporters.

In the instance of albuterol, the R-enantiomer is more effective than the S-enantiomer because it has a stronger affinity for the drug's target, the beta-2 adrenergic receptor. Because the R-enantiomer is metabolised more slowly by the body, it remains active for a longer amount of time and creates a stronger and longer-lasting impact.

Similarly, the S-enantiomer of Ritalin is more efficacious than the R-enantiomer. The S-enantiomer is more effective in blocking dopamine and norepinephrine reuptake, which are neurotransmitters involved in attention and focus. The R-enantiomer has less effect on these neurotransmitters and is metabolised quickly by the body, resulting in a shorter duration of action.

In summary, changes in pharmacological efficacy across enantiomers are caused by differences in their interactions with biological molecules as well as variances in how the body metabolises them. These distinctions can have serious consequences for therapeutic effectiveness and safety.

Answer:

Na3N

Explanation:

cuzdoodlikeimsosure

The molar mass of a gas with a density of 1.02 g/L at 2.13 atm and a temperature of 20°C is 47.9 g/mol.The molar mass of an element or compound is the mass of one mole of that substance. A mole is the SI unit for the amount of a substance.

It's defined as the amount of a substance that contains the same number of entities as there are atoms in 12 grams of carbon-12.Molar mass (M) = mass (m) ÷ amount of substance (n)So, M = m/n

Where m is the mass in grams and n is the number of moles. The unit of molar mass is grams per mole (g/mol).

The ideal gas law is used to calculate the molar mass of a gas. The ideal gas law is:P V = n R T,Where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

Convert the density to grams per liter: 1.02 g/L.

The density is mass/volume, thus 1.02 g/L means that 1 liter of the gas weighs 1.02 g.

This means that 1 mole of gas will occupy 22.4 L (at standard temperature and pressure, STP).Calculate the number of moles of gas using PV = nRT.P = 2.13 atmV = 22.4 L (at STP)R = 0.0821 L·atm/K·molT = 273.15 K + 20 K = 293.15 K

Thus, n = PV/RT = (2.13 atm × 22.4 L)/(0.0821 L·atm/K·mol × 293.15 K) = 0.973 mol

Calculate the molar mass (M) using M = m/n.m = density × volume = 1.02 g/L × 22.4 L = 22.848 gM = m/n = 22.848 g/0.973 mol = 23.5 g/mol Convert to units of grams per mole: 23.5 g/mol

The molar mass of a gas with a density of 1.02 g/L at 2.13 atm and a temperature of 20°C is 47.9 g/mol.

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