Which of the following is a benefit of using a debit card for a purchase?
A. You do not need a pin to withdraw funds or make purchases.
B. You can get cash back.
C. You can share it with friends and family.
D. You can use it as a credit card and pay off your debt on a monthly basis.

52.6g and 23.8mL necessary 100mL of a solution that is simultaneously 15.6 mg/mL malonic acid, 3.38 mg/mL MnSO4 • H2O, and 0.03% starch to make this solution.

What is malonic acid?

The chemical formula of malonic acid is CH2(COOH)2. Malonates include the ionized form of malonic acid as well as its esters and salts. Because it interferes with respiration, malonic acid is extremely harmful, especially in cases of cancer and other degenerative disorders (the making of ATP in mitochondria). Malonic acid is a somewhat unstable substance with limited practical uses. Beetroot contains its calcium salt, however the acid itself is often made by hydrolyzing diethyl malonate.

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1.15 g of Cu are there in a sample of Cu that contains\(1.09*10^{24}\)atoms

The number of grams of Cu in a sample containing\(1.09*10^{24}\)atoms can be determined using Avogadro's number, which is \(6.02*10^{23}\)atoms/mol.

First, we need to calculate the number of moles of Cu in the sample. To do this, we divide the number of atoms by Avogadro's number to get the number of moles:

\(\frac{1.09*10^{24} atoms }{6.02*10^{23} atoms/mol }= 1.81*10^{-1 }mol\)

The sample's mass needs to be determined next. Since copper has an atomic mass of 63.55 g/mol, we can use this to determine the sample's mass:

\(1.81*10^{-1} mol * 63.55 g/mol = 1.15 g\)

Therefore, the sample contains 1.15 g of Cu.

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The change in the internal energy of the system is +69 J, indicating that the system has gained energy.

The change in internal energy of the system can be calculated using the First Law of Thermodynamics, which states that the change in internal energy of a system is equal to the heat added to the system minus the work done by the system on its surroundings.

In this case, the system receives 57 J of energy as heat, which means that the heat is added to the system, and the value is positive (+57 J). On the other hand, the system does 12 J of work on the surroundings, which means that the work is done by the system, and the value is negative (-12 J).

Using the First Law of Thermodynamics, we can calculate the change in internal energy of the system as:

ΔU = Q - W

ΔU = (+57 J) - (-12 J)

ΔU = 69 J

Therefore, the change in the internal energy of the system is +69 J, indicating that the system has gained energy.

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The reaction is exothermic , it is the true reaction of the equation.

What is exothermic?

Exothermic refers to a chemical reaction that produces heat. In exothermic reactions, bonds are broken in the reactants, but bonds are broken in the products more often, releasing more energy. Exothermic reactions are characterized by a rise in the reaction mixture's temperature.

What is reaction ?

One or more chemicals, sometimes referred to as reactants, are changed into one or more new substances, referred to as products, during a chemical reaction. Chemical elements and compounds are both substances.

CH4(g) + 4Cl2(g) → CCl4(l) + 4HCl(g)

ΔH= ((−139 kJ/mol) + 4 x (−92.31 kJ/mol)) - ((−74.87 kJ/mol) + (121.0 kJ/mol))= (-508.24 kJ/mol) - 46.13 kJ/mol = -554.37 kJ/mol.

Therefore, reaction is exothermic , it is the true reaction of the equation.

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The mass of the precipitate, CrPO₄ formed when 45.5 mL of 0.300 M Na₃PO₄ react with 42.5mL of 0.200 M Cr(NO3)₃ is 1.25 g

We'll begin by calculating the number of mole of Na₃PO₄ and Cr(NO3)₃ present in the solution.

Molarity of Na₃PO₄ = 0.3 M

Volume = 45.5 mL = 45.5 / 1000 = 0.0455 L

Mole = Molarity × Volume

Mole of Na₃PO₄ = 0.3 × 0.0455

Molarity of Cr(NO3)₃  = 0.2 M

Volume = 42.5 mL = 42.5 / 1000 = 0.0425 L

Mole = Molarity × Volume

Mole of Cr(NO3)₃ = 0.2 × 0.0425

Next, we shall determine the limiting reactant.

Na₃PO₄(aq) + Cr(NO₃)₃(aq) —> CrPO₄(s) + 3NaNO₃(aq)

1 mole       :      1 mole

0.01365    :      0.0085 mole

Thus, Cr(NO₃)₃ is the limiting reactant.

Next, we shall determine the number of mole of CrPO₄ produced from the reaction.

From the balanced equation above,

1 mole of Cr(NO₃)₃ reacted to produce 1 mole of CrPO₄.

Therefore,

0.0085 mole of Cr(NO₃)₃ will also react to produce 0.0085 mole of CrPO₄.

Finally, we shall determine the mass of 0.0085 mole of CrPO₄.

Mole of CrPO₄ = 0.0085 mole

Molar mass of CrPO₄ = 52 + 31 + (16×4)

= 52 + 31 + 64

= 147 g/mol

Mass = mole × molar mass

Mass of CrPO₄ = 0.0085 × 147

Therefore, the mass of the precipitate, CrPO₄ formed is 1.25 g

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Because air puffs up the cream as it is whipped, there is a physical change even though the ingredients are still cream and air.

Physical modifications are those that affect a chemical substance's form but not its chemical content. Physical changes may normally be used to separate compounds into chemical elements or simpler compounds, but they cannot be used to separate mixtures into their component compounds.

Liquid cream is extensively combined with small air bubbles to form the foam colloid known as whipped cream. Because milk is transformed from a colloid (cream) to a solid (butter) without changing its chemical makeup, turning milk into butter is a physical transformation. This change in the body can be undone.

Thus, there is a physical change even though the ingredients are still cream and air.

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The initial pressure exerted on the balloon was 8 atmospheres.

To find the initial pressure exerted on the balloon, we can use Boyle's Law, which states that the pressure of a gas is inversely proportional to its volume when temperature is constant. The formula for Boyle's Law is P1V1 = P2V2, where P1 and V1 represent the initial pressure and volume, and P2 and V2 represent the final pressure and volume.

In this case, we are given that the initial volume (V1) is 14 L and the final volume (V2) is double the initial volume (2 x V1). We are also given that the final pressure (P2) is 4 atmospheres. We need to find the initial pressure (P1).

Using the formula P1V1 = P2V2 and plugging in the given values, we have:

P1 * 14 = 4 * (2 * 14)

P1 * 14 = 4 * 28

P1 * 14 = 112

To isolate P1, we divide both sides of the equation by 14:

P1 = 112 / 14

P1 = 8

It's important to note that the unit of pressure in this case is atmospheres, as stated in the question. If the pressure unit had been different, appropriate unit conversions would have been necessary.

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Answer:

We need more? What else is in the question? This is unanswerable.

Explanation:

Answer:

3.89 ×10^-5

Explanation:

Since they are gaseous reactants, we obtain the equilibrium constant from the given partial pressures;

p(H2O) = 0.0900 bar

p(H2) = 0.00100 bar

p(O2) = 0.00350 bar

The equation of the reaction is;2H2O(g)⇄2H2(g)+O2(g)

Kp= p(H2) . p(O2)/p(H2O)

Kp= 0.00100 × 0.00350/0.0900

Kp= 3.89 ×10^-5

Answer:

37.8g/ 10.81g/mol = 3.4968...moles

The term mole concept is used here to determine the number of moles of boron. The number of moles of boron in 37.8 g and 10.81 g/mol is 3.49 mol.

One mole of a substance is defined that amount of it which contains as many particles or entities as there are atoms in exactly 12 g of carbon-12. One mole of any substance contains Avogadro number of molecules.

The equation which is used to calculate the number of moles is given as:

Number of moles = Given mass / Molar mass

The molar mass of boron = 10.81 g/mol

Here the given mass of boron = 37.8 g

Then the number of moles is calculated as:

n = 37.8 /  10.81  = 3.49 mol

Thus the number of moles in 37.8 grams of boron is 3.49 mol.

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The result of the computation when you follow the steps is 1.699.

A logarithm is a mathematical function that represents the exponent or power to which a specific base must be raised to obtain a given number. In simpler terms, it answers the question: "To what power must we raise a base number to obtain a certain value?"

What you should do is that on your calculator, you could press the logarithm key and then put in the value that has been shown and then the result would be displayed on your calculator.

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Answer:

b I hope this is right good luck

Answer:Many nocturnal animals have a mirror-like layer, called the tapetum, behind the retina, which helps them make the most of small amounts of light.

Explanation:

The volume of nitrogen dissolved in blood plasma is 0.4 L.

The maximum volume of nitrogen that can dissolve in the diver's blood plasma is obtained as follows:

Number of moles of nitrogen dissolved at a depth of 93.0 m = Henry's constant * pressure at 93.0 m * volume of plasma

Number of moles of nitrogen =  5.80 × 10⁻⁴ * 10 * (4.95 * 55%)

Number of moles of nitrogen = 0.0158 moles

Hence,;

n = 0.0158 moles

R = 0.08206 L.atm/mol/K

T = 37 + 273 = 310 K

P = 1 atm

V = 0.0158 * 0.08206 * 310/1

V = 0.4 L

In conclusion, the volume of nitrogen dissolved in blood plasma is determined using the number of moles of dissolved nitrogen.

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Answer:

Brightness

Explanation:

Answer:

Brightness  is the property that enable the panning of gold possible

Answer:

6moles of Mg

Explanation:

The reaction expression is given as:

          BO₃   +    3Mg   →    3MgO    +    B

Given:

Number of moles of B produced  = 2 moles

Unknown:

Number of moles of Mg required  = ?

Solution:

  From the balanced reaction expression:

          1 mole of B is produced from 3 moles of Mg

          2 moles of B will be produced from 2 x 3  = 6moles of Mg

Explanation:

the sum of PE and KE is mechanical energy this means energy during motion and position I think the answer is motion and stored or it may be internal

Answer:

a

Explanation:

i did the test

Answer:

0.00011 JK.

The process does NOT violate the second law of thermodynamics

Explanation:

The following parameters are given which are going to help in solving for the change in entropy of the system. The term "entropy'' simply means the degree of disorderliness of a system.

=> The temperature of container A = 305 K, the temperature of container B = 295 K and the amount of heat generated when the containers are placed in contact with each other = 1. 1 J.

The change in entropy of the hot container = -(1/305) = - 0.00328 J/K.

The change in entropy of the cold container = 1/295 = 0.00339 J/K.

Therefore, the change in the entropy of the system = - 0.00328 J/K + 0.00339 J/K = 0.00011 JK.

Note that the change in entropy of the system gives a positive value. Hence, this process does not violate the second law of thermodynamics.

The process does NOT violate the second law of thermodynamics.

Answer: Calcium, Magnesium, and Iron

Explanation:

The reactivity series is a list of metals arranged in the order of their decreasing activities. Sodium is the second metal of activity series so it can displace calcium, magnesium and iron because all of them come after sodium in activity series.

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The percent by mass of nitrogen in ammonia (NH3) is approximately 82.15%

Calculating the mass of nitrogen to the total mass of the compound and then expressing the result as a percentage will allow us to determine the percent by mass of nitrogen in NH3 (ammonia).

Ammonia's molecular structure, NH3, indicates that it is made up of one nitrogen atom (N) and three hydrogen atoms (H). We must take both the molar masses of nitrogen and ammonia into account when calculating the percent by mass of nitrogen.

Nitrogen's (N) molar mass is roughly 14.01 g/mol. The molar masses of nitrogen and hydrogen are added to determine the molar mass of ammonia (NH3). Since hydrogen's molar mass is around 1.01 g/mol, ammonia's molar mass is:

(3 mol H 1.01 g/mol) + (1 mol N 14.01 g/mol) = 17.03 g/mol = NH3.

Now, we can use the following formula to get the nitrogen content of ammonia in percent by mass:

(Mass of nitrogen / Mass of ammonia) / 100% is the percentage of nitrogen by mass.

Ammonia weighs 17.03 g/mol and contains 14.01 g/mol of nitrogen by mass. By entering these values, we obtain:

(14.01 g/mol / 17.03 g/mol) 100% 82.15 % of nitrogen by mass

Ammonia (NH3) has a nitrogen content that is roughly 82.15 percent by mass.

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Answer:

It is Though the transfer of charges from one object to another, or (A).

Answer:

The heat and pressure can rearrange the minerals in the rocks

The concept ideal gas equation is used here to determine the volume of the carbondioxide. Combustion reactions are generally highly exothermic reactions. The volume of CO₂ is

A combustion is a chemical reaction in which a fuel undergoes oxidation as a result of the reaction with an oxidizing agent which causes the release of energy in the form of heat.

15.0 °C = 288 K

The ideal gas equation is:

PV = nRT

V = nRT / P

V = 354 × 0.0821 × 288 / 0.995 = 8412.3 L

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Answer:

-196 kJ

Explanation:

By the Hess' Law, the enthalpy of a global reaction is the sum of the enthalpies of the steps reactions. If the reaction is multiplied by a constant, the value of the enthalpy must be multiplied by the same constant, and if the reaction is inverted, the signal of the enthalpy must be inverted too.

2S(s) + 3O₂(g) → 2SO₃(g)  ΔH = -790 kJ

S(s) + O₂(g) → SO₂(g)         ΔH = -297 kJ (inverted and multiplied by 2)

2S(s) + 3O₂(g) → 2SO₃(g)  ΔH = -790 kJ

2SO₂(g) → 2S(s) + 2O₂(g)   ΔH = +594 kJ

-------------------------------------------------------------

2S(s) + 3O₂(g) + 2SO₂(g) → 2SO₃(g) + 2S(s) + 2O₂(g)

Simplifing the compounds that are in both sides (bolded):

2SO₂(g) + O₂(g) → 2SO₃(g) ΔH = -790 + 594 = -196 kJ

Answer:

compaction and cementation

Explanation:

sedimentary rock is layered rock, in order to become sedimentary it most be compacted to form layers and cemented to become hard. This is what i think. Hope i can help :)

Using the stoichiometry of the balanced chemical reaction, the mass of the Ti is 144Kg.

The term chemical reaction refers to the combination of two or more substances to yiled one or more products.

The reaction equation here is; 4Na(s) + TICI4---->Ti(s) + 4NaCl(s)

Number of moles of TiCl4 = 570  * 10^3g/190 g/mol = 3000 moles

If 1 mole TiCl4 produces 1 mole of Ti

3000 moles of TiCl4 produces 300o moles of Ti

Mass of Ti produced = 3000 moles * 48 g/mol = 144Kg

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The calculated medication dose is 3.010³g/kg

Patients receive medications either as a dosage or as a single dose. These two terms have various connotations. A dosage is a set amount of medication administered all at once. It is a singular value for mass or volume. It can alternatively be described as the mass or volume of the medicine divided by the patient's body weight. A drug's dosage is the precise quantity, number, and frequency of doses given over a precise period of time.

The dose (one time) of medication for an adult patient is the subject of this question. The patient mass is given in pounds, and the drug mass is supplied in milligrams; m drug = 200 mg

145 lbs., patient

In order to respond to this query, we convert the patient's mass to kilograms and the drug mass to micrograms:

Drug = 200 mg, 10³ mg, and 2.00, 10⁵ g

145 lb patient = kg/2.20 lb = 65.9 kg

The medication dose is:

mdrug Mpatient = 2.0010⁵g/65.9kg

= 3.010³g/kg

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