Come up with 2 examples of derived units from everyday life.

Answer: Just as the organs in an organ system work together to accomplish their task, so the different organ systems also cooperate to keep the body running. For example, the respiratory system and the circulatory system work closely together to deliver oxygen to cells and to get rid of the carbon dioxide the cells produce.

Explanation:

Answer:

She can measure the volume and mass of the marble, the volume and mass of the water, and the mass of the graduated cylinder.

Explanation:

Graduated cylinders are used to measure volume, hence she can be able to measure the volume of the marble from the volume of water displaced. The measuring cylinder is also used to measure the volume of the water. The balance is used to measure the mass of the water and mass of the marble.

A molecule or subunit that functions alone or combines with other similar molecules to form a polymer. All of the biomolecules that make up our cells are made up of strings of monomers. For example, proteins are made up of strings of amino acids and nucleic acids are strings of nucleotides.

Answer:

the porson above me is right

Based on the specific rotation value of -31.5 deg.mL/dmig for cholesterol, the correct statement is option B. Cholesterol is levorotatory.

Specific rotation is a measure of the angle by which plane-polarized light is rotated when it passes through a sample of a chiral compound.

In the case of cholesterol, the specific rotation value of -31.5 deg.mL/dmig indicates that it is levorotatory.

Levorotatory compounds rotate plane-polarized light in a counterclockwise direction, which is represented by a negative sign in the specific rotation value.

In conclusion, the specific rotation value of -31.5 deg.mL/dmig indicates that cholesterol is levorotatory. Option B is the correct answer.

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The given question is in an inappropriate manner. The correct question is:

Cholesterol has a specific rotation of -31.5 deg.mL/dmig. Based on this information, select all statements that are true about cholesterol.

A. None of the other statements are correct.

B. Cholesterol is levorotatory.

C. Cholesterol has an R-configuration.

D. Cholesterol is dextrorotatory.

E. Cholesterol has an S-configuration.

Answer:  see below

Explanation:

When multiplying or dividing, use the smallest number of significant figures (sf) of the digits provided.

37(a) 24 × 3.26 = 78.24      2 sf × 3 sf -->  round to 2 sf's

                          ≈ 78

   (b) 120 × 0.10 = 12            2 sf × 2 sf -->  round to 2 sf's

                          = 12

   (c) 1.23 × 2.0 = 2.46            3 sf × 2 sf -->  round to 2 sf's

                          = 2.5

    (d) 53 × 1.53 = 81.09            2 sf × 3 sf -->  round to 2 sf's

                          = 81

38(a)  4.84 ÷ 2.4 = 2.0167           3 sf × 2 sf -->  round to 2 sf's

                          = 2.0

   (b)  60.2 ÷ 20.1 = 2.995         3 sf × 3 sf -->  round to 3 sf's

                            = 3.00

    (c) 102.4 ÷ 51.2 = 2               4 sf × 3 sf -->  round to 3 sf's

                          = 2.00

    (d) 168 ÷ 58 = 2.896                  3 sf × 2 sf -->  round to 2 sf's

                          = 2.9

The information provided; it can be inferred that the strength of the electrical current is related to the concentration of ions in the solution. Therefore, acid the beaker with the strongest electrical current must have a high concentration of ions.

The first and second beakers both lit the light bulbs brightly, indicating that they have a high concentration of ions and are therefore strong electrolytes. It is not clear whether they are acids or bases, but they are strong because they produce a lot of ions in solution. The third beaker barely lit up the bulb, suggesting that it has a low concentration of ions and is therefore a weak electrolyte. The options presented suggest that the third beaker contains a weak acid, which is a plausible explanation. A weak acid only partially dissociates in solution, producing fewer ions and a weaker electrical current.  Therefore, the most likely answer is C) The first beaker contains a weak base, the second beaker contains a weak acid, and the third beaker contains a strong acid.

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Explanation:

The ice melting would make more water because ice is water and if it melts it make water.

hope this helps :)

Molecular formula of a compound whose molecular mass is 60.00 g/mol and has an empirical formula of C₂H₈N₂.

We know the empirical formula and thus the molar mass of the empirical formula, we simply need to find out how many of these fit into the molar mass of the molecular formula.

In this problem, we have an empirical formula of CH₄N

so the molar mass is 12 + 4 + 14 = 30 g/mol.

Molecular formula mass/Empirical formula mass=60 g/mol/30 g/mol=2

The molecular formula is TWICE that of the empirical formula.

Molecular formula = 2XCH₄N = C₂H₈N₂

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Answer:

C2H8N2

Explanation:

edge 2023

Answer:

its a Double Displacement (Metathesis) reaction

the balanced equation is 3AgNO3 + K3PO4 → Ag3PO4 + 3KNO3

Explanation:

The reactions with the highest activation energies require the reactants to break over a thermodynamic barrier before products may be created. Chemical reactions have a strong correlation.

Between their activation energy and pace. More specifically, the slower the chemical reaction is, the larger the activation energy is. This is so because molecules cannot start a reaction until they have surpassed the activation energy barrier.

Extreme Reactions A pleasant response or a spontaneous reaction are two names for an exergonic reaction. Exergonic reactions disperse energy across the environment. The chemical bonds that are created as a result of the reaction are stronger than the ones that the reactants broke. As a result, the system's free energy falls.

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Answer:

I am explain you in image

25.8 g of NH₄NO₃ decomposed to produce 32.3 L of water vapor.  71.4 g of NH₄NO₃ are needed to produce 10.0 L of O₂.

a) To determine the number of liters of water vapor produced, we first need to calculate the moles of NH₄NO₃ that decompose:

The molar mass of NH₄NO₃ is:

M(NH₄NO₃) = 14.01 g/mol (N) + 4(1.01 g/mol) (H) + 3(16.00 g/mol) (O) = 80.05 g/mol

The moles of NH₄NO₃ can be calculated as:

moles NH₄NO₃  = mass/molar mass = 25.8 g / 80.05 g/mol = 0.322 moles  NH₄NO₃

From the balanced equation, we see that 4 moles of H₂O are produced for every 2 moles of  NH₄NO₃  that decompose, so we can calculate the moles of H₂O produced as:

moles H₂O = 4/2 x moles NH₄NO₃ = 4/2 x 0.322 = 0.644 moles H₂O

Finally, we can use the ideal gas law to calculate the volume of water vapor produced at 350 degrees C and 0.950 atm:

PV = nRT

V = nRT/P

V = (0.644 mol) (0.0821 L·atm/mol·K) (623 K) / (0.950 atm) = 32.3 L

Therefore, 25.8 g of NH₄NO₃ decomposed to produce 32.3 L of water vapor.

b) To determine the grams of NH₄NO₃ needed to produce 10.0 L of O2, we can use the same approach, starting with the ideal gas law:

The molar volume of a gas at standard temperature and pressure (STP) is 22.4 L/mol.

The moles of O2 needed to produce 10.0 L can be calculated as:

moles O2 = V/STP = 10.0 L / 22.4 L/mol = 0.446 moles O2

From the balanced equation, we see that 2 moles of  NH₄NO₃ decompose to produce 1 mole of O2, so we can calculate the moles of NH₄NO₃ needed as:

moles NH₄NO₃= 2/1 x moles O2 = 2/1 x 0.446 = 0.892 moles NH4NO3

Finally, we can use the molar mass of NH4NO3 to calculate the grams needed:

mass NH₄NO₃ = moles NH₄NO₃ x molar mass = 0.892 mol x 80.05 g/mol = 71.4 g

Therefore, 71.4 g of NH₄NO₃ are needed to produce 10.0 L of O₂.

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When 256.0 J of heat is conducted from a 405.0 K heat reservoir to a cooler reservoir at 100.0 K, the resulting entropy change is 1.00 J/K.

According to the Second Law of Thermodynamics, the entropy change can be calculated using the equation ΔS = Q/T, where ΔS is the change in entropy, Q is the heat transferred, and T is the temperature of the reservoir in Kelvin.

In this case, 256.0 J of heat is transferred from a reservoir at 405.0 K to a reservoir at 100.0 K. Converting the temperatures to Kelvin, we have T1 = 405.0 K and T2 = 100.0 K. Substituting the values into the equation, we get ΔS = 256.0 J / (405.0 K - 100.0 K) = 0.865 J/K.

Therefore, the entropy change is 0.865 J/K when 256.0 J of heat is transferred by conduction from a heat reservoir at a temperature of 405.0 K to another reservoir at 100.0 K.

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Answer:

water is not a solid and a rock is a solid

Answer: The density of a substances is generally known as mass per unit volume. And The SI unit is Kg/m3. Mass Versus Weight: Always there is confusion in people between mass and weight. Actually, the mass of an object is referred to its weight. In the scientific concepts mass refers loosely to the amount of matter in an object.

Explanation:

It would take approximately 8.09 hours for the drug to degrade to 15% of the initial concentration.

To calculate the time it would take for the drug to degrade to 15% of the initial concentration (0.1M), we can use the first-order degradation equation:

ln([A]/[A]0) = -kt

where [A] is the concentration of the drug at time t, [A]0 is the initial concentration of the drug, k is the rate constant, and t is the time interval.

We can rearrange this equation to solve for t:

t = -(ln([A]/[A]0)) / k

Plugging in the given values, we get:

t = -(ln(0.15/1)) / 0.1 hr^-1 = 8.09 hours

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According to Avogadro's number, there are 23.72×10²³ atoms of hydrogen atoms are found in 3.94 mol of NH₅.

Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.

It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .

Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number, on substitution number of atoms= 3.94×6.023×10²³=23.72×10²³  atoms.

Thus, there are 23.72×10²³ atoms of hydrogen atoms are found in 3.94 mol of NH₅.

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Grams to Atoms Calculator is a free online tool that displays the conversion from grams to atoms for the particle. BYJU’S online grams to atoms calculator tool makes the conversion faster and it displays the conversion to atoms in a fraction of seconds.

How to Use Grams to Atoms Calculator?

The procedure to use the grams to atoms calculator is as follows:

Step 1: Enter the atomic mass number, grams and x in the respective input field

Step 2: Now click the button “Calculate x” to get the output

Step 3: Finally, the conversion from grams to atoms will be displayed in the output field

How to Convert Grams to Atoms?

The conversion of particles from grams to atoms can be determined as below:

Suppose you have 10 gram of carbon. Now, it should be converted in terms of atoms.

We know that the molar mass of 1 mole of carbon is equal to 12. It means that 12 grams per mole

Also, the Avogadro constant is 6.02 x 1023

So, the conversion of carbon from grams to atoms is given by

= 10(1/12)( 6.02 x 1023)

= 5.02 x 1023

Therefore, 10 grams of carbon is equal to 5.02 x 1023 atoms

Answer:What bonding pattern do you observe that you could use to predict whether a compound will be gas at standard temperature and pressure?

Alcohol is more soluble in water than ether. And CH4 is non polar. So, CH4 will be almost insoluble water.

CH3OH - most soluble

CH3-O-CH3 - second

CH4 - least soluble.

Solubility is defined as the maximum amount of a substance that will dissolve in a specified amount of solvent at a specified temperature. Solubility is a characteristic property of a particular solute/solvent combination, and different substances have very different solubilities.

Solubility can be expressed in grams of solute in one liter of saturated solution. For example, the solubility in water at 25 oC is 12 g/L. Molar solubility is the number of moles of solute per liter of saturated solution. For example, 0.115 mol/L at 25 oC

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Answer:

B

Explanation:

The weight of magnesium chloride required to prepare the 200 ml solution that is 5.0 M is approximately 48 grams.

To calculate the weight of magnesium chloride (\(MgCl_{2}\)) required to prepare a 200 ml solution that is 5.0 M, we need to use the formula: Weight (in grams) = Volume (in liters) × Concentration (in moles/liter) × Molecular Weight (in grams/mole)

First, we convert the volume from milliliters to liters by dividing it by 1000: Volume = 200 ml ÷ 1000 = 0.2 L. Next, we multiply the volume, concentration, and molecular weight: Weight = 0.2 L × 5.0 mol/L × 95.3 g/mol = 47.65 grams

Rounding to the nearest whole number, the weight of magnesium chloride required to prepare the 200 ml solution that is 5.0 M is approximately 48 grams.

This calculation ensures that the desired concentration is achieved by accurately measuring the appropriate amount of magnesium chloride, taking into account its molecular weight and the desired volume of the solution.

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The labs in this chemistry class use a green approach, which means they prioritize environmentally friendly practices.

In this chemistry class, the term "green approach" refers to a set of practices and principles that prioritize environmental sustainability and minimize negative impacts on the ecosystem. These labs aim to reduce their carbon footprint, conserve resources, and promote responsible waste management. By adopting a green approach, the class strives to align its scientific pursuits with the goal of environmental stewardship.

One of the key aspects of the green approach in these chemistry labs is the conscious selection and utilization of environmentally friendly materials and chemicals. This includes opting for safer alternatives to hazardous substances whenever possible, such as using non-toxic solvents or reagents. Additionally, the labs may encourage the use of renewable resources and promote the recycling or repurposing of materials to reduce waste generation.

Another important component of the green approach is energy conservation. The labs may employ energy-efficient equipment and lighting systems, as well as implement strategies to minimize energy consumption during experiments. For instance, they may encourage students to turn off equipment when not in use and adopt efficient heating or cooling methods.

Furthermore, the labs may focus on water conservation by promoting responsible water usage and minimizing water wastage during experiments. This could involve using water-efficient techniques, such as microscale experiments that require smaller amounts of water, or implementing recycling systems to capture and reuse water when appropriate.

By embracing a green approach, these chemistry labs aim to instill environmental awareness and responsibility in students while demonstrating that scientific progress can coexist with sustainable practices. Through this approach, students gain valuable knowledge and skills that they can apply in their future scientific endeavors, contributing to a more sustainable and eco-friendly society.

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Demerol, also known as Meperidine, is an opioid pain medication prescribed for the relief of moderate to severe pain. When administering medication, it is crucial to be precise in measuring the dose, and in this question, we need to determine how many mL of Demerol 50 mg to administer.

The amount of Demerol that needs to be administered is 25 mg, and the prefilled syringe contains Demerol 50 mg in a 1 mL volume.

We can calculate the required volume using the following formula:  Required volume = Required dose ÷ Concentration of drug in the solutionThe concentration of Demerol is 50 mg per 1 mL.

Therefore:25 mg ÷ 50 mg/mL = 0.5 mLThis means that 0.5 mL of Demerol will be administered to the client.

It is important to ensure that the syringe is correctly labelled with the drug name, strength, dose, and expiration date, and to confirm that the client's medication order matches the prescription before administering the medication.

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The  correct equilibrium expressions that match the given reactions are;

We know that in a chemical reaction, there is a number that shows us the extent to which the reactants have been converted into products. We know that the more the reactants are converted into products, the more this value is large and positive. On the other hand, if a lot of the reactants are not converted into products then the value would be negative and small.

This value that I have talking about is called the equilibrium constant. We can be able to obtain the equilibrium constant from the law of mass action. It is the ratio between the concentrations of the products and the reactants all raised to the power of the stoichiometric coefficients.

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1 mole of C₆H₄Cl₂ in 1 liter H₂0 would have the highest freezing point.

When discussing solutions in chemistry, one learns about their equilibrium temperature known as the freezing point - where liquid and solid states exist simultaneously.

However, unlike pure solvents, solutions have lower freezing points due to obstruction caused by solute particles preventing solvent molecules from forming solids efficiently. Furthermore, it's essential to acknowledge that this depression increases in proportion with a solution's molality.

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