What is the density of an object (g/cm) that has a mass of 2.78 g & a volume of 10.0
cm3?

Answer:

3, 1, 3, 1 is a required answer.

Answer:

hollowness : how much empty space there is inside a thing

Explanation:

even if something is big it can

fly or float

if there is a lot of empty space inside

which means a plane or boat have lower density

Answer:

Something that has a higher density will have more mass packed into it while something that has a lower density will have less mass.

think of comparing a pebble to a piece of popcorn. the pebble is more dense because it has more mass in the space it takes up than the popcorn.

One of the direct consequences of lactose intolerance is digestive discomfort, which can include bloating, abdominal pain, and diarrhea.

This occurs because individuals with lactose intolerance lack the necessary enzyme, lactase, to properly break down lactose, the sugar found in milk and dairy products. Without enough lactase, lactose remains undigested and can cause discomfort as it passes through the digestive system.

It is important for individuals with lactose intolerance to avoid or limit their intake of dairy products or use lactase supplements to aid in digestion. Failure to manage lactose intolerance can lead to ongoing discomfort and potential nutrient deficiencies from avoiding dairy products.

When lactose is not broken down and absorbed, it causes gastrointestinal symptoms such as bloating, gas, abdominal pain, and diarrhea. These symptoms usually occur within 30 minutes to 2 hours after consuming lactose-containing foods. Lactose intolerance is a common condition, affecting around 65% of the global population to varying degrees. It can result from genetic factors, reduced lactase enzyme production, or an injury to the small intestine.

Learn more about lactose intolerance here: brainly.com/question/11054515

#SPJ11

The solubility of Au(OH)3 in 1.2M nitric acid solution is \($\left(\frac{1}{3}\right) \times 8.33 \times 10^{-15}\, \text{M}$\)

This dissociation reaction will be represented by the equation:

Au(OH)3 (s) ⇌ Au3+ (aq) + 3 OH- (aq)

Considering that the solution is 1.2M nitric acid, we can consider that the concentration of H+ ions is equal to 1.2M. However, we must not forget that nitric acid is very strong and this causes it to completely dissociate in solution, so that the concentration of H+ ions is equal to 1.2M, while the concentration of NO3- ions is neglected. It is important to remember this information in order to continue the calculation.

Thus, to find the concentration of OH- ions we will use the equilibrium constant of the water dissociation reaction, which will be represented by:

Kw = [H+] [OH-]

We know that the concentration of H+ is 1.2M, we can calculate the concentration of OH-.

Kw = (1,2) [OH-]

The equilibrium constant of water (Kw) is equal to 1.0 x 10^-14 at room temperature. Therefore, to solve this equation, we will consider that the concentration value of [OH-] will be "x".

Substituting the values in the formula, we get the following equation:

\(1,0 * 10^-^1^4 = (1,2) x\\\\ x= 8,33 * 10^-^1^5 M.\)

Before starting our calculation, it is essential to remember that the stoichiometric ratio between Au3+ and OH- in the Au(OH)3 dissociation reaction is 1:3. This means that for every Au3+ ion formed, three OH- ions are consumed.

Therefore, the solubility of Au(OH)3 is equal to one-third of the concentration of OH- ions. This will allow us to find the equation that reveals that the solubility of Au(OH)3 will be approximately \($\left(\frac{1}{3}\right) \times 8.33 \times 10^{-15}\, \text{M}$\)

Learn more about solubility:

https://brainly.com/question/28170449

#SPJ4

Answer:

50 ml of water

Explanation:

25 + 25 = 50

Thanks for points

Answer:

8.923

Explanation:

Answer:

200 kPa

(it is actually 199.999, but rounding up it is 200)

hope this helps!

Answer:

1500 Torr is  about 200 kPa

Answer:

30000

Explanation:

6/100×500000 =30000

Answer and explanation

H2Se is an acid because it can lose the hydrogen ion, H2Se is an acidic hydride because it is found on the right of the periodic table, in vertical row of the periodic table, acidity usually increases with increasing atomic number.

H2O is a base because it can accept the hydrogen ion, this is a hydride found on the left side of the periodic table. Base strength inreases as you go up the periodic table, also increases as you go from group 7 to 4, as the groups decrease. The opposite occurs with acids.

• The balanced equation for the reaction is given by:

• From the above reaction we can see that:

1 mole of ethanol (CH3Ch2OH) produces 1 mol of acetic acid(CH3COOH)

so . x mole of ethanol will produce 0.9mol of acetic acid ....(cross multiply)

xmol ethanol * 1mol acetic = 1mol ethamol* 0.9molacetic

∴ xmol ethanol = 1*0.9 /1

= 0.90 mol

• This means that, 0.90 mol of ethanol, is needed to produce 0.9mol acetic acid,.

The pH of the resulting solution is approximately 4.3. To calculate the pH of the resulting solution, we need to use the equation for pH: pH = -log[H⁺]

First, let's calculate the number of moles of HCl that are present in the solution. We can use the formula:

moles = concentration * volume

Concentration of HCl = 1.0 M
Volume of HCl = 0.05 mL

= 0.05 * 10⁻³  L

= 5 * 10⁻⁵ L

moles of HCl = 1.0 M * 5 * 10⁻⁵ L

= 5 * 10⁻⁵ moles

Now, let's calculate the total volume of the resulting solution:

Total volume = 0.05 mL + 999.95 mL

= 1000 mL

= 1000 * 10⁻³ L

= 1 L

To calculate the concentration of H⁺ ions in the solution, we divide the moles of HCl by the total volume:

[H⁺] = moles of HCl / total volume

[H⁺] = 5 * 10⁻⁵ moles / 1 L

= 5 * 10⁻⁵ M

Finally, we can calculate the pH using the equation:

pH = -log[H⁺]

pH = -log(5 * 10⁻⁵)

= -(-4.3)

= 4.3

Therefore, the pH of the resulting solution is approximately 4.3.

To know more about pH, refer

https://brainly.com/question/12609985

#SPJ11

One potential method for extracting PCBs from environmental water samples is solid-phase extraction (SPE) using activated charcoal as the extraction material.

The procedure would involve passing the water sample through a column packed with activated charcoal to trap the PCBs. After the sample has passed through the column, the PCBs would be eluted using a suitable solvent such as hexane.

The eluent containing the PCBs could then be concentrated using a rotary evaporator or other suitable technique, and the resulting residue could be analyzed using gas chromatography-mass spectrometry (GC-MS).

The use of activated charcoal as the extraction material is effective because it has a high surface area and can adsorb a wide range of organic compounds, including PCBs.

To know more about organic compounds, refer here:

https://brainly.com/question/5994723#

#SPJ11

Answer:a

Explanation: I don't know

The increasing order of entropy for the substances given is as follows.

1. Ice

2. Water

3. Vaopr

Entropy is used to measure how random the particles in a system are. If the particles are in complete disarray, they have a higher entropy value. On the other hand, if they are perfectly arranged with no possible movement, then the substance has less or minimal entropy.

Entropy is one of the fundamental concepts in Thermodynamics and is associated with energy distribution in an isolated system. To be more precise, it also gives us different ways in which the particles can be distributed within the isolation.

In natural systems, entropy tends to increase with the passage of time, as all particles automatically turn toward disorders.

In the given cases, Ice has the least entropy as its solid particles have no room to move around, and their movements are restricted to vibrations only. Whereas for Vapor, due to very low forces between particles, they have near complete freedom of movement. Liquids like water come in between with their intermediate mobility.

Thus, the increasing order of entropy turns out to be Ice, Water, and Vapor.

For more on Entropy,

brainly.com/question/32484278

#SPJ4

Answer:

B:Selective breeding

Explanation:

Selective breeding is when someone picks animals with desired traits. A example would be cows, if you want cows offspring to produce more milk than you would select cows that are producing the greatest amount of milk at the moment.

Answer: 167.2 J

Explanation:

According to the research, the body systems work together to perform a common function through the coordination of endocrine substances and nerve impulses.

They are the different sets of organs that make up the body, collaborating in each case with the fulfillment of some specific type of functions.

This simultaneous and juxtaposed set of systems involves various organs, ducts, tissues and various glands, all coordinated by endocrine substances and nerve impulses, so as to operate more or less autonomously as the case may be.

Therefore, we can conclude that according to the research, the body systems work together to perform a common function through the coordination of endocrine substances and nerve impulses.

Learn more body systems here: https://brainly.com/question/19704422

#SPJ1

At STP, 22.4 liters of nitrogen gas (N2) will have a mass of 28 grams.

At STP (Standard Temperature and Pressure), which is defined as a temperature of 0°C (273.15 K) and a pressure of 1 atmosphere (atm), 22.4 liters of any gas will contain one mole of the gas.

This is based on Avogadro's Law, which states that equal volumes of gases at the same temperature and pressure contain the same number of particles, regardless of their chemical nature and physical properties.

To find the mass of 22.4 liters of nitrogen gas (N2) at STP, you first need to determine the molar mass of nitrogen gas. Nitrogen has an atomic mass of approximately 14 atomic mass units (amu). Since N2 is a diatomic molecule, meaning it consists of two nitrogen atoms, the molar mass of N2 is 2 * 14 amu = 28 grams per mole.

Now that you have the molar mass, you can determine the mass of 22.4 liters of nitrogen gas at STP. Since there is one mole of N2 in 22.4 liters at STP and the molar mass of N2 is 28 grams per mole, the mass of 22.4 liters of nitrogen gas at STP is:

1 mole * 28 grams per mole = 28 grams

Learn more about STP here :-

https://brainly.com/question/30778889

#SPJ11

The balanced chemical equation for the combustion of liquid pentene  in oxygen gas to form carbon dioxide gas and water vapor is:

\(C_5H_10 (l) + 8O_2 (g)\) → \(5CO_2 (g) + 5H_2O (g)\)

This equation shows that one molecule of pentene reacts with eight molecules of oxygen gas to produce five molecules of carbon dioxide gas and five molecules of water vapor. The equation is balanced because there are equal numbers of atoms of each element on both sides of the equation.

This combustion reaction is exothermic, which means that it releases heat and light energy. It is also a type of oxidation reaction in which pentene reacts with oxygen gas to form carbon dioxide and water, while the carbon-hydrogen bonds in pentene are broken and replaced by carbon-oxygen and hydrogen-oxygen bonds.

Learn more about here:

https://brainly.com/question/15117038

#SPJ11

Answer:

0.327214 mol

Explanation:

45.5/278.106=0.163607

Then, 0.163607x2= 0.327214

Large polar and charged molecules face challenges in crossing biological membranes due to the hydrophobic nature of the lipid bilayer that forms the membrane.

The lipid bilayer acts as a barrier to the movement of  large polar and charged molecules. However, there are several mechanisms by which large polar and charged molecules can cross biological membranes:

1. Protein channels or pores: Membrane proteins called channels or pores can form openings in the lipid bilayer that allow specific ions or molecules to pass through.

These channels are often selective and regulate the passage of specific molecules based on size, charge, or other properties.

2. Transporters or carriers: Membrane transport proteins, known as transporters or carriers, facilitate the transport of large polar molecules across the membrane.

These proteins undergo conformational changes to bind with the molecule on one side of the membrane and release it on the other side.

3. Vesicular transport: Large molecules can be transported across membranes through vesicular transport processes.

Endocytosis involves the engulfment of molecules by the membrane to form a vesicle that is internalized into the cell.

Exocytosis, on the other hand, involves the fusion of vesicles containing molecules with the cell membrane, leading to their release outside the cell.

4. Active transport: Some large polar or charged molecules may be actively transported across the membrane against their concentration gradient using energy derived from ATP.

This process requires specific transporter proteins and is often used for the uptake or elimination of important ions or molecules.

5. Facilitated diffusion: Facilitated diffusion is a passive transport mechanism that relies on carrier proteins to transport specific molecules across the membrane down their concentration gradient.

Although it does not require energy, facilitated diffusion is selective and often limited by the availability of carrier proteins.

It's important to note that the specific mechanism utilized by a particular molecule to cross the membrane depends on its properties, such as size, charge, concentration gradient, and availability of transport proteins.

The presence and abundance of specific transport proteins in the membrane also play a significant role in determining the permeability of large polar and charged molecules.

To know more about lipid bilayer refer here:

https://brainly.com/question/31936880#

#SPJ11

Therefore, the correct answer is (a) 33.3 kJ explain how we arrived at this answer, we need to use the formula:
q = (m_water x C_water x ΔT) + (C_bomb x ΔT)

Where:
q = heat released by combustion of glucose
m_water = mass of water in the calorimeter (925 g)
C_water = specific heat capacity of water (4.184 J/g°C)
ΔT = change in temperature of the calorimeter (30.8°C - 23.8°C = 7°C)
C_bomb = heat capacity of the bomb calorimeter (893 J/°C)

Plugging in the values we get:

q = (925 g x 4.184 J/g°C x 7°C) + (893 J/°C x 7°C)
q = 28,902.25 J + 6,251 J
q = 35,153.25 J

However, the answer choices are in kJ, so we need to convert J to kJ:

q = 35,153.25 J ÷ 1000
q = 35.15325 kJ

Rounding to the nearest tenth, we get:

q = 66.9 kJ

Therefore, the answer is d. 66.9 kJ.
To determine the heat released by the combustion of the glucose sample, we need to calculate the heat absorbed by the water and the bomb calorimeter. Here's the solution:

The heat released by the combustion of the glucose sample is 33.3 kJ. Therefore, the correct answer is (a) 33.3 kJ.

To know more about  glucose sample visit:-

https://brainly.com/question/15550996

#SPJ11

Answer:

The answer to this question would be electron.

Electron is located on the outer side of the atom and constantly moving in an orbit so its location cannot be accurately determined. The cloud around the center of the atom is drawn to picture the orbit.

Neutron and proton located in the middle of an atom in a part that called nucleus. Nucleus location is kept at the center and it doesn't move.

Explanation:

To calculate the molarity of the resulting solution, we need to first find the number of moles of NaHCO3.  The molar mass of NaHCO3 is 84.01 g/mol.

Using the given mass of NaHCO3 (5.623 g), we can calculate the number of moles by dividing the mass by the molar mass:  5.623 g / 84.01 g/mol = 0.067 moles Next, we need to find the volume of the solution in liters.

Given that the volume is 250.0 ml, we convert it to liters by dividing by 1000: 250.0 ml / 1000 = 0.250 L
Finally, we can calculate the molarity by dividing the number of moles by the volume in liters:
0.067 moles / 0.250 L = 0.268 M. Therefore, the molarity of the resulting solution is 0.268 M.

To know more about molarity visit:

brainly.com/question/29656486

#SPJ11

When both parents shared different traits either it will be heterogeneous or homogenous traits,in that case offspring traits neither belongs to parents.However,chances are very that traits of children neither belongs to parents.

Unaffected parents can create impacted offsprings assuming that the two guardians are transporters (heterozygous) for the attribute being followed in the family. Latent traits are normally not communicated in each age. Finally, guys and females are similarly prone to communicate a latently acquired characteristic.

In the event that the latent characteristic is more than prevailing, the recessive traits will really become predominant and the predominant attribute will become recessive.Recessive alleles are meant by a lowercase letter (a versus A). Just people with an aa genotype will communicate a latent characteristic; consequently, posterity should get one passive allele from each parent to display a latent traits.

To know more about traits,visit here:

https://brainly.com/question/16307346

#SPJ4

CPT-I: Carnitine Translocase: CPT-II

What Is Carnitine Palmitoyltransferase II Deficiency?

Carnitine Palmitoyltransferase II (CPT II) deficiency, caused by mutations in the CPT2 gene, is an inherited disease in which the body cannot convert long-chain fatty acids into energy to fuel the body. There are three forms of the disease, and the severity and symptoms vary based on the form. In all three forms, symptoms can be triggered by periods without eating (fasting).

To know more about this follow the link below:

https://brainly.com/question/16153580

#SPJ4

Answer:

In Chemistry, proteins are defined as biomolecules that are essential for the human body to maintain homeostasis. In a PCR test, short for Polymerase Chain Reaction test, scientists are tracking for a certain chemical substance in our body that may be present in the process of protein synthesis or DNA replication that could possibly show if a person is positive for the Corona Virus.Therefor, the relation between Chemistry and the PCR test is that, without Chemistry, the PCR test would not be able to stand on its own, which in other words means the PCR test is dependent upon the presence of Chemistry.