Which of the following is a moral issue?

A. Not keeping accurate records of an experiment.
B. Conducting a drug experiment which will harm lab rats.
C. Accidentally reporting false data
D. Communicating false data from an experiment.

Answer:

b is the correct answer

do not trust answer one

Explanation:

The volume of solution needed if I need to make 2.5 L of a 0.2 M fruit drink solution from the 0.7 M drink solution is 0.714L.

The concentration of a solution can be calculated using the following formula;

McVc = MdVd

According to this question, one needed to make 2.5 L of a 0.2 M fruit drink solution from the 0.7 M drink solution. The final volume needed is as follows:

2.5 × 0.2 = 0.7 × V

0.5 = 0.7V

V = 0.714L

Learn more about volume at: https://brainly.com/question/15136171

#SPJ1

The molar mass of MgCrO4 is approximately 140.30 g/mol.

To determine the molar mass of MgCrO4 (magnesium chromate), we need to calculate the sum of the atomic masses of each individual element in the compound.

The chemical formula MgCrO4 indicates that the compound consists of one magnesium atom (Mg), one chromium atom (Cr), and four oxygen atoms (O).

The atomic masses of the elements can be found on the periodic table:

Magnesium (Mg) has an atomic mass of approximately 24.31 g/mol.

Chromium (Cr) has an atomic mass of around 51.99 g/mol.

Oxygen (O) has an atomic mass of about 16.00 g/mol.

Now, we can calculate the molar mass of MgCrO4 by summing up the atomic masses of each element, considering the respective subscripts:

Molar mass = (Atomic mass of Mg) + (Atomic mass of Cr) + 4 × (Atomic mass of O)

Molar mass = (24.31 g/mol) + (51.99 g/mol) + 4 × (16.00 g/mol)

Molar mass = 24.31 g/mol + 51.99 g/mol + 64.00 g/mol

Molar mass ≈ 140.30 g/mol

for more such questions on mass

https://brainly.com/question/24191825

#SPJ8

Q = Ksp = 1 × 10^(-12).

Substituting the values into the Nernst equation, we have:

0.799 V = E° - (RT/2F) * ln(1 × 10^(-12))

Now, solving for E°:

E° = 0.799 V + (RT/2F) * ln(1 × 10^(-12))

The value of R is the ideal gas constant, T is the temperature in Kelvin, and F is the Faraday constant.

To find the standard reduction potential at 25°C for the half-reaction Ag2CrO4(s) + 2e¯ → 2Ag(s) + CrO4²-(aq), we can use the Nernst equation, which relates the standard reduction potential (E°) to the equilibrium constant (K) and the reaction quotient (Q).

The Nernst equation is given as follows:

E = E° - (RT/nF) * ln(Q)

Given information:

Ksp = 1 × 10^(-12)

E = +0.799 V (standard reduction potential of Ag+ to Ag)

Since the reaction involves the dissolution of Ag2CrO4(s), the reaction quotient Q can be expressed as [Ag+]²/[CrO4²-].

Since the stoichiometry of the reaction is 2:1 for Ag2CrO4 to Ag+, we can say that [Ag+]² = Ksp.

Therefore, Q = Ksp = 1 × 10^(-12).

Substituting the values into the Nernst equation, we have:

0.799 V = E° - (RT/2F) * ln(1 × 10^(-12))

Now, solving for E°:

E° = 0.799 V + (RT/2F) * ln(1 × 10^(-12))

The value of R is the ideal gas constant, T is the temperature in Kelvin, and F is the Faraday constant.

Please note that without specific values for temperature (T) and the ideal gas constant (R), the exact standard reduction potential at 25°C cannot be determined.

For more question on temperature

https://brainly.com/question/4735135

#SPJ8

The total amount of hydrogen gas generated is 9.76 L, under the condition that 15.9 g of hydrochloric acid reacts with excess zine metal.

Furthermore the balanced chemical equation for the reaction between hydrochloric acid and zinc metal is:
2HCl + Zn → ZnCl₂ + H₂
The molar mass of HCl is 36.46 g/mol.
Then, 15.9 g of HCl is equivalent to 15.9 g / 36.46 g/mol = 0.436 mol of HCl.
As per  the balanced chemical equation, 1 mole of HCl reacts with 1 mole of Zn to produce 1 mole of H₂ gas.
Hence, 0.436 mol of HCl will produce 0.436 mol of H₂ gas.
In Stp (Standard Temperature and Pressure), one mole of any gas occupies 22.4 L.
So, 0.436 mol of H₂ gas will occupy:
0.436 mol × 22.4 L/mol = 9.76 L (approx)
Then, approximately 9.76 L of hydrogen gas will be produced when 15.9 g of hydrochloric acid reacts with excess zinc metal at STP.
To learn more about molar mass
https://brainly.com/question/837939
#SPJ1

Answer:

b.exothermic and entropy is decreasing

Answer:

False, Solubility increases with temperature for most solids.

Explanation:

Answer:

Malachite green is prepared by the condensation of benzaldehyde and dimethylaniline to give leuco malachite green (LMG): Second, this colorless leuco compound, a relative of triphenylmethane, is oxidized to the cation that is MG: C6H5CH(C6H4N(CH3)2)2 + HCl + 1⁄2 O2 → [C6H5C(C6H4N(CH3)2)2]Cl + H2O.

Explanation:

Answer: NaOH(aq)+HLC(aq) -> NaCl(aq) +H20(l)

Explanation:

1  the amount of NaOH titrated, Naoh can be calculated using stoichiometry

1 mole of NaOH reacts with 1 mole of HCL.

nNaOH =nHCl=(0.500mol/L)*(40.00mL/1000mL)=0.0200 moles

2  the concentration of NaOH can be calculated using

 [NaOH]=nNaoh/vNaOH

where vNaOH is volume of NaOH solution used in titration and we used 1:1 stoichiometry ratio to determine the concentration of NaOH

The reaction between NaOH and HCl is given below-

NaOH(aq) + HCl(aq) → NaCl(aq) + H2O(l)

1 mole of NaOH reacts with exactly 1 mole of HCl.

We can find out the no. of moles of NaOH by finding the Molarity of NaOH.

We have to apply the formula-

M1 V1 = M2 V2

M1 = ? = molarity of NaOH

V1 = volume of NaOH = 50ml

V2 = volume of HCl = 40 ml

M2 = molarity of HCl = 0.5 M

M1 = 0.4 M

Molarity = (No. of moles of solute ÷ Volume of solution in liters)

No. of moles of NaOH = 0.4 × 0.05 = 0.02

Therefore, no. of moles of NaOH are 0.2 and it's concentration as molarity is 0.4.

Learn more about molarity, here:

https://brainly.com/question/2817451

#SPJ2

The valency of elements tends to decrease as we move down the periodic table of non-metal and metal.

The ability of an element to combine is referred to as valency. It is the number of electrons that an elemental atom loses, gains, or shares with another atom to form a stable configuration of electrons.

The occasional table is organized so that components with comparable valencies are set in a similar gathering. Components in a similar gathering have similar number of valence electrons, which decides their substance properties.

The valency of the elements tends to decrease as we move down a periodic table of metals and non-metals. This is because the number of electron shells, or energy levels, increases as we move down a group. The peripheral electrons in a particle are the valence electrons.

The expanded distance between the core and the peripheral electrons brings about more vulnerable fascination between them. As a result, the atom becomes more reactive and can lose or gain electrons more easily.

For instance, in bunch 1 of the occasional table, the valency of the components diminishes as we drop down the gathering. The valencies of lithium (Li), sodium (Na), and potassium (K) are, respectively, 1, 1, and 1.

This is due to the fact that each possesses one valence electron. Because the outermost electron is further from the nucleus and therefore more likely to be lost or gained, the valency decreases as we move down the group.

In conclusion, as we move down the periodic table, from non-metal to metal, the valency of elements tends to decrease. This is because the nucleus and the outermost electrons are less attracted to one another as the energy levels rise.

For more such questions on valency

https://brainly.com/question/30555742

#SPJ11

Answer:

CH2(CO2H)2 + 2KBrO3 = 2KBr + 3CO2 + 2H20

Explanation:

Left side

C: 1 + 2

H: 2 + 2

K: 2

Br: 2

O: 2 + 6

Right side

C: 3

H: 2 x 2

K: 2

Br: 2

O: 6 + 2

The non-metal elements in Group 7 – known as the halogens – get less reactive as you go down the group

Answer & Explanation:

The reactivity of elements in Group VII, also known as Group 17, decreases with increasing atomic radius. This is because halogens have high electronegativities and a proclivity to gain electrons in noble gas configurations. Myths are traditional stories or beliefs that explain cultural or societal beliefs, customs, or natural phenomena. They can be passed down through generations and can be based on true or fictitious events. Mythology, on the other hand, is the collection of myths associated with a specific culture or religion. Mythology can be amplified through retelling, incorporation into religious practices; association with significant events or figures, and adaptation into other media forms such as literature, film, or art.

Answer:

THE FINAL TEMPERATURE OF THE LIQUID SAMPLE  IS 30.45 DEGREE CELSIUS

Explanation:

Mass of the liquid sample = 1424 g

Initail temperature = 30 degree C

Heat evolved = 1560 J

Specific heat of the liquid = 2.44 J/g degree C

Final temperature = unknown

Since the heat evolved by a substance is the product of the mass, specific heat capacity and the change in temperature of the sample

Heat = Mass * Specific heat * change in temp.

                                       H = m c (T2-T1)

Re-arranging the formula by making T2 (final temperature) the subject of the equation, we have:

         T2= H/ m c + T1

So therefore, introducing the value of the variables and solving for T2, we have:

T2 = 1560 / 1424 * 2.44 + 30

T2 = 1560 / 3474.56 + 30

T2 = 0.4487 + 30

T2 = 30.4487 degree C

The final temperature of the liquid sample is approximately 30.45 degree C

Answer:

Explanation:

Limiting is HCl and excess is Ca(OH)2

excess is 296 grams Ca(OH)2

2 moles H2O will be formed

Answer:

The particles gain more kinetic energy and they move around faster

Answer:

P-block

Explanation:

Chlorine

Atomic number (Z) 17

Group group 17 (halogens)

Period period 3

Block p-block

Answer:

What does "in which block does chlorine lies"? That question has no way to answer it because there is no question content lol

Explanation:

Answer:

D) Refraction

Explanation:

Refraction is when something is bended or when it changes directions, such as light

The light bends or changes direction when it's being refracted. So the correct option is D.

The bending of a light ray when it's passing from one medium to another medium is called refraction. The bending of the ray is due to the differences in density between the two media.

The change in the direction of a wave when it's passing from one medium to another is defined as refraction.  This is one of the most commonly observed phenomena in nature. The working of optical instruments like magnifying glasses, lenses, and prisms is possible due to refraction.

Also, because of the refraction of light, a person can focus light on their retina and is thus able to see. Whenever a light ray travels at an angle into a medium of different refractive indices, it always refracts. This is a change in speed which results in a change in direction.

There are two laws of refraction. They state that:

                                         \(\frac{sin (i)}{ sin (r)} = constant\)

Therefore the correct option is D.

Read more about refraction, here

https://brainly.com/question/2660868

#SPJ6

The features of all the resonance forms of a molecule or ion have in common is atoms present, number of electrons, net charge on the molecules or ion and arrangement of atoms.

Resonance is defined as a phenomenon that occurs when the matching vibrations of another object increases the amplitude of an objects oscillation.

There are basically five types of resonance

Resonance is most important because it provide much more realistic view of the shape of a molecule.

Thus, the features of all the resonance forms of a molecule or ion have in common is atoms present, number of electrons, net charge on the molecules or ion and arrangement of atoms.

To learn more about resonance, refer to the link below:

https://brainly.com/question/23287285

#SPJ2

4.7 × 10²⁴ atoms Li

Math

Pre-Algebra

Order of Operations: BPEMDAS

Chemistry

Atomic Structure

Stoichiometry

Step 1: Define

7.8 mol Li

Step 2: Identify Conversions

Avogadro's Number

Step 3: Convert

Step 4: Check

We are told to round to 2 sig figs. Follow sig fig rules and round.

4.69716 × 10²⁴ atoms Li ≈ 4.7 × 10²⁴ atoms Li

Answer:

Since the compound contains 25.2% Hydrogen by mass and the compound is made of only carbon and hydrogen

Mass% of carbon = 100 - (mass% of hydrogen)

Mass% of carbon = 100 - 25.2

Mass% of carbon = 74.8%

Mass of each element in a given sample:

Let us take a 100 g sample of this compound

Since there is 25.2% hydrogen by mass, there is 25.2g hydrogen for every 100g of the compound

Similarly, there is 74.8 g carbon for every 100g of the compound

So, in a 100g sample:

Mass of Hydrogen = 25.2 grams

Mass of Carbon = 74.8 grams

Number of moles of each element in the 100g sample:

Moles of Carbon:

Molar mass of carbon = 12 g/mol

Number of moles = Given mass / molar mass

Number of moles = 74.8 grams / 12 g/mol

Moles of Carbon = 6.24 moles

Moles of Hydrogen:

Molar mass of Hydrogen = 1 g/mol

Number of moles = given mass / molar mass

Moles of Hydrogen = 25.2 / 1

Moles of Hydrogen = 25.2 moles

Empirical Formula:

The empirical formula of a compound is the simplest whole number ratio of the number of moles of the elements in the compound

Empirical formula  = Moles of Carbon : Moles of Hydrogen

Empirical formula = 6.24 / 25.2

Since we need a whole number ratio, and these numbers don't simplify to be whole numbers. we will multiply both of them with a common number which will make them both whole

Multiplying both the numbers by 25 makes them whole

Empirical formula = 6.24 * 25 / 25.2 (25)

Empirical formula = 156 / 630

further simplifying the numbers, we can divide them both by 2

Empirical formula = 78 / 315

dividing these numbers by 3

Empirical formula = 16 / 105

Therefore, the ratios of the moles of carbon to the moles of Hydrogen in the empirical formula is:   16 : 105

Empirical formula = C16H105

The new pressure of the gas in the syringe is 113 kPa

The new volume of the syringe will also increase if the syringe were warmed to 45°C and the pressure remains constant.

When we have a relation between the volume of a gas, the pressure, and the temperature participating together we can use the Combined Gas Law to solve the new pressure or volume.

The combined gas law shows the relation between Boyle's Law, Charles Law, and Gay-Lussac's Law and can be expressed by using the formula:

\(\mathbf{\dfrac{P_1V_1}{T_1}= \dfrac{P_2V_2}{T_2}}\)

From the parameters given:

\(\mathbf{\dfrac{105 \times 35 }{295 }= \dfrac{P_2 \times 35}{318}}\)

\(\mathbf{P_2= \dfrac{12.458 \times 318}{35}}\)

\(\mathbf{P_2= 113 \ kPa}\)

However, if the initial volume is increased let say to 50 mL and pressure is constant:

\(\mathbf{\dfrac{V_1}{T_1}= \dfrac{V_2}{T_2}}\)

\(\mathbf{\dfrac{ 50 }{295 }= \dfrac{ x}{318}}\)

\(\mathbf{x = \dfrac{ 318 \times 50 }{295 }}\)

x = 54 mL

Therefore, the new volume of the syringe will also increase if the syringe were warmed to 45°C and the pressure remains constant.

Learn more about the combined gas Law here:

https://brainly.com/question/25587265

we would need 2625.13 grams (or 2.62513 kilograms) of NaCl.

To calculate the mass of NaCl required to produce a 26.4 mol/L solution with a 1.7 L volume, we need to use the formula that relates the mass of solute, moles of solute, and molarity:Molarity (M) = moles of solute / liters of solution Rearranging this formula, we get:moles of solute = Molarity (M) x liters of solutionWe can use this formula to find the moles of NaCl needed:moles of NaCl = 26.4 mol/L x 1.7 L = 44.88 molNow, we can use the molar mass of NaCl to convert from moles to grams. The molar mass of NaCl is 58.44 g/mol:mass of NaCl = moles of NaCl x molar mass of NaClmass of NaCl = 44.88 mol x 58.44 g/mol = 2625.13 gTo produce a 26.4 mol/L solution with a 1.7 L volume.

for more question on NaCl

https://brainly.com/question/23269908

#SPJ8

The synthesis reactions are generally exothermic. They release energy in the form of heat and light. In such reactions new compounds are found to be formed. Among the given options, none are synthesis reaction. So the given options are incorrect.

A reaction in which multiple reactants combine together to form a single product is defined as the synthesis reaction. It is a chemical reaction in which two or more simple substances combine to form a more complex compound.

1. H₂ + Br₂ → 2HBr = Redox reaction

2. 2H₂O + 2Na → 2NaOH = Redox reaction

3. NaCl → Na+ + Cl = Dissociation

4. Mg + H₂SO4 → MgSO4 + H₂​ = Single replacement

To know more about synthesis reaction, visit;

https://brainly.com/question/16987748

#SPJ1

Answer:

Claim: The chemical equation presented in the data table does NOT follow the law of conservation of matter

Evidence: Since we initially have 14.25 grams of Na and 9.5 grams of HCl

we will find the number of moles in each, to further apply stoichiometry

So,

Moles of Na: Given mass/Molar Mass = 14.25/23 = 0.62 Moles of Na

Moles of HCl: Given mass/Molar Mass = 9.5/36.5 = 0.26 Moles of HCl

Since HCl is the limiting reagent in this reaction,

0.26 Moles of Na will be consumed, which is equal to

5.98 grams of Na

Reasoning:

We are given that the total mass of the product is 22.98 grams

but through stoichiometry, we have found that only (9.5 + 5.98) = 15.48 grams of product can possibly be formed

Hence, the reaction presented in the table does NOT follow the law of conservation of matter

Answer:

BaSO4(aq) + TiO(aq) —> BaO(aq) + TiSO4(aq)

Explanation

The equation for the reaction between barium sulfate and titanium (II) oxide is given below:

BaSO4 + TiO —>

In solution, the reactants will dissociates as follow:

BaSO4(aq) —> Ba^2+(aq) + SO4^2-(aq)

TiO(aq) —> Ti^2+(aq) + O^2-(aq)

The double displacement reaction will occur as follow:

Ba^2+(aq) + SO4^2-(aq) + Ti^2+(aq) + O^2-(aq) —> Ba^2+O^2-(aq) + Ti^2+SO4^2-(aq)

We can see that a double displacement reaction occurred as there is a double exchange of ions in the solution. The elemental equation is given below:

BaSO4(aq) + TiO(aq) —> BaO(aq) + TiSO4(aq)

To prepare 12 capsules each containing 80 mg of morphine sulfate and 3.2 mg of naltrexone hydrochloride, the following calculations can be used:

Calculate the total weight of the morphine sulfate and naltrexone hydrochloride: 80 mg + 3.2 mg = 83.2 mg

Calculate the weight of the diluent required: 12 capsules * 83.2 mg/capsule = 999.6 mg

Calculate the volume of the diluent required based on its density (assume a density of 0.9 g/mL for lactose): 999.6 mg / (0.9 g/mL) = 1.11 mL

Calculate the weight of the diluent required based on its volume: 1.11 mL * 0.9 g/mL = 1 g

Calculate the amount of the diluent required based on the sensitivity of the prescription balance: 1 g / (6 mg/g) = 166.7 mg

The amount of the diluent required according to this calculation is 166.7 mg. This amount should be rounded up to the nearest whole number (167 mg) to account for the 4% error tolerance. The final aliquot would therefore contain 167 mg of lactose, 80 mg of morphine sulfate, and 3.2 mg of naltrexone hydrochloride.

Mass that is number of protons and  neutrons is lost in an atom  as a result of radioactive decay.

An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.

The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.

Learn more about atom,here:

https://brainly.com/question/13981855

#SPJ1

The number of CFU's in the original sample is 540000000.

The colony forming unit stands for (CFU) is a measure of viable colonogenic cell numbers in CFU/mL. CFU's are an indication of the number of cells that remain viable enough to proliferate and form small colonies.

CFU/ml = [Number of colonies ][Dilution factor]/Volume of cultre plate

In the question , Volume of cultre sample=0.1 ml

Dilution factor = Final volume/Sample volume

                        = 0.1 ml/1 ml

                        = 0.1 ml

Let x be the number of colonies,

CFU =[x 1/10] /0.1 =540000000

x = 540000000 × 0.1 × 10

  = 540000000

Therefore CFU in the original sample = [540000000 × 1/10 ] /0.1

                                                               = 540000000

Learn more about CFU's from the link given below.

https://brainly.com/question/27056503

#SPJ4