I need this ASAP

A young scientist wants to focus on drug creation. What is one of the first
things he should do?
O A. Look into trends of various diseases and their effects on society.
B. Research available drugs for treating illnesses such as cancer and
heart disease, as well as the side effects of these drugs.
C. Test a composite material in the lab to see how it can be
improved
D. Make a plan for how to conquer a disease with drugs.

The ketone that can be shown by the description have been shown in the image attached.

A strong analytical method known as mass spectrometry can reveal important details about the make-up, structure, and characteristics of molecules. It enables researchers to pinpoint and examine a sample's chemical and isotopic features.

The mass of a molecule or an ion can be precisely determined using mass spectrometry. The mass-to-charge ratio (m/z) measurement enables the recognition and verification of a compound's molecular formula. Particularly relevant to the study of pharmaceutical analysis, biochemistry, and organic chemistry.

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Answer: c

Explanation: effusion because there is a movement of a gas through a small opening into a larger volume

Answer:

4.25atm

Explanation:

\(\frac{P1V1}{T1}\\\)=\(\frac{P2V2}{T2}\)

where ,

p1 =845/760=1.11atm

v1=6.50l

t1=25c +273k=298k

p2=?

v2=1850/1000=1.85l

t2=325k

so answer is 4.25 atm

Answer:

It would be 151.832775 because one mole is 44.0095*3.45 i hope this helps!

Explanation:

Answer:

the outcome of something

Dan should be responsible and know that hazardous waste needs proper disposal. He should be aware of the proper disposal methods of waste acetone to keep the environment and humans safe.

Dan collected approximately 10 milliliters of waste acetone during an experiment in chemistry 101.

To properly dispose of the waste acetone, Dan should follow these actions:Label:

Label the waste container properly and correctly with the chemical name acetone and a hazardous waste label.

This would help others know what the container contains, and it will prevent confusion in case another substance is also in the vicinity.

Tighten the container: Ensure that the cap of the container is tightly closed.

This will prevent the acetone from evaporating, spilling or leaking out from the container.

Proper Storage: Dan should store the waste acetone in a cool, dry and well-ventilated area, away from direct sunlight. Flammable materials should not be near the container as acetone is flammable.

He should not store it in metal containers, as acetone can corrode metal containers.

Contact Authorities: Dan should contact the authorities in charge of hazardous waste disposal in his area to know the proper way to dispose of waste acetone. In some places, they have specialized collection sites for hazardous waste.

He should never pour waste acetone down the drain, on the ground, or in the trash.

Dan should be responsible and know that hazardous waste needs proper disposal. He should be aware of the proper disposal methods of waste acetone to keep the environment and humans safe.

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In general, metals are characterized by the listed metals (A) brittleness, (D) high electrical conductivity, (F) high thermal conductivity

1) Brittleness: Metals are known to be brittle, which means they have low ductility and tend to break or crack when subjected to stress, instead of deforming plastically. This property is due to the metallic bonding between atoms, which creates a rigid structure that is not easily deformed.

2) High electrical conductivity: Metals are good electrical conductors, meaning they allow electricity to flow easily through them. This property is due to the presence of free electrons in the metal's structure, which are able to move and carry electrical charges.

3) High thermal conductivity: Metals have high thermal conductivity, meaning they can easily transfer heat from one point to another. This property is due to the metallic bonding between atoms, which allows for efficient transfer of heat-carrying phonons throughout the metal's structure. This makes metals good choices for many industrial applications that require efficient transfer of heat, such as in electrical equipment, heat exchangers, and heat pipes.

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it can be be be be be ebe be e e

Answer:(c)

Explanation:

A partial pressure of 0.816 atm of CO₂ is required to dissolve 100.0 mg of CO₂ in 1.00 L of water.

The partial pressure of CO₂ required to dissolve 100.0 mg of CO₂ in 1.00 L of water is determined using the following equation:

where the gas constant is 0.0821 L·atm/(mol·K).

Convert 100.0 mg of CO₂ to moles:

100.0 mg / (44.01 g/mol) = 0.00227 mol

Solving for the partial pressure:

1.45 g/L / (44.01 g/mol) = partial pressure / (0.0821 L·atm/(mol·K) x 298 K)

0.03296 mol/L = partial pressure / 24.8 L·atm/mol

partial pressure = 0.816 atm

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Answer:

Benzaldehyde (C6H5CHO) is an organic compound consisting of a benzene ring with a formyl substituent. It is the simplest aromatic aldehyde and one of the most industrially useful.

Answer:

The first question is option 2

and the second question in option 1

Explanation:

To shed light on the process by which titanium dioxide (TiO2) nanoparticles are formed, titanium tetrachloride (TiCl4) hydrolysis has been investigated.

Hydrogen chloride (HCl) gas, which is extremely caustic and hazardous, is known to be released violently when TiCl4 reacts with water. The estimate of the scope and gravity of the effects of large accidents that have been identified, such as an unintentional spill of TiCl4, is, however, not shared by the industry.

An alternative strategy (which is the opposite of the solution above) would be to assert that since metal chlorides are often ionic, titanium chloride must be a tiny (covalent) molecule with weak molecular interactions if it is a liquid at room temperature.

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Answer:

B

Explanation:

Answer:

196.96655

Explanation:

The answer is 196.96655. I assume you are converting between grams Gold and mole. The molecular formula for Gold is Au. The SI base unit for the amount of substance is the mole.

The quantity present in an atom or molecules of a given substance is called moles it is written as mol and is calculated with the help of molar mass and mass of the given substance.

0.507699 mol is present in the 100 gm of gold.

Given,

The formula for calculating moles is:

\(\rm Moles (n) = \dfrac{Mass}{Molar \;mass}\)

Substituting values in the formula:

\(\begin{aligned}\rm n & = \dfrac{100}{196.967}\\\\ & = 0.507699 \;\rm mol\\\\& = 0.5077\;\rm mol\end{aligned}\)

Therefore, 0.5077 mol is present in 100 gm of gold.

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Answer: 3

Explanation:

According to the given statement the molarity of the iron(ii) solution is 0.72 M.

Molarity (M), which is determined by dividing the solute's mass in moles by the the solution's volume in liters, is the most widely used unit to represent solution concentration: litres of solution/moles of salt equals M. One liter of a solution with a 1.00 molar concentration (1.00 M) contains 1.00 moles of solute.

Volume of iron(II) solution (V₁) = 25.0 mL = 0.025 L

Molarity of iron(II) solution (M₁) = ?

Number of moles of iron(II) solution (n₁) = ?

Volume of dichromate solution (V₂)

= 18.0 mL

= 0.018 L

Molarity of dichromate solution (M₂) = 0.175 M

Number of moles of dichromate solution (n₂) = ?

Molarity of dichromate solution is given as:

M\(_2\) = n\(_2\)/V\(_2\)

n\(_2\) = M\(_2\) * V\(_2\)

= .175 * 0.018

= 3.15 * 10^-3

Now, let us write the complete balanced reaction for the given situation.

So, the complete balanced equation is given below.

\($6 \mathrm{Fe}^{2+}(a q)+\mathrm{Cr}_2 \mathrm{O}_7^{2-}(a q)+14 \mathrm{H}^{+}(a q) \rightarrow 6 \mathrm{Fe}^{3+}(a q)+2 r^{3+}(a q)+7 \mathrm{H}_2 \mathrm{O}$\)

From the equation, it is clear that, 1 mole of dichromate is required for 6 moles of iron(II) solution.

To find the number of moles of iron(II) solution.

1 mole of dichromate = 6 moles of iron(II)

∴ n₂ moles of dichromate = 6n₂ moles of iron(II)

                                          = 6 * 3.15 * 10⁻³ = 0.0189 mol Fe²⁺

So, 0.016 moles of iron(II) is needed. Therefore,

Now, molarity of iron(II) solution is given as:

Molarity = Moles ÷ Volume

M\(_1\) = n\(_1\)/v\(_1\)

M\(_1\) = 0.018/0.025  = 0.72 M

The molarity of the iron(II) solution is 0.72 M.

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Answer:

4

Explanation:

Equilibrium is a dynamic state in which the forward and reverse reaction rates are equal; the quantities of the reactants and products are not necessarily equal.

(You got this keep up the good work). :)

The rate of the forward reaction equals the rate of the reverse reaction in the equilibrium reaction.

A state of balance between opposing forces or actions.

Equilibrium is when the rate of the forward reaction equals the rate of the reverse reaction.

All reactant and product concentrations are constant at equilibrium.

Equilibrium is a dynamic state in which the forward and reverse reaction rates are equal; the quantities of the reactants and products are not necessarily equal.

Hence, option D is correct.

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Given the symbol Cl-37, the element is Cl, but there is no information about its charge. When this is like that, it is implicit it is an atom, that is, it is neutral, its charge is 0.

The number indicates is the mass number, so its mass is 37.

So, mass is 37 and charge is 0.

Given information: Humidity of air H = 0.021 kg H2O/kg dry air Temperature T = 32.2°CPressure P = 101.3 kPa. . Thus, the percentage relative humidity HR is 68.6%.

To find: (a) Percentage humidity Hp (b) Percentage relative humidity HR Formula used: Percentage humidity (Hp) = H × 100% Relative Humidity (HR) = (H/Hs) × 100%, where Hs is the humidity of saturated air at the given temperature (T) and pressure (P) Calculation: (a) Percentage humidity Hp = H × 100% = 0.021 × 100% = 2.1%. So, percentage humidity Hp = 2.1% (b) For finding the percentage relative humidity HR, we first need to find the humidity of saturated air (Hs) at 32.2°C and 101.3 kPa abs pressure. Now, looking at the steam table, we have: Saturated humidity of air at 32.2°C, Hs = 0.0313 kg H2O/kg dry air At pressure, P = 101.3 kPa. Therefore, relative humidity HR = (H/Hs) × 100%= (0.021/0.0313) × 100% = 67.5%

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To solve this problem, we need to use the balanced chemical equation for the reaction between calcium carbonate (CaCO3) and hydrochloric acid (HCl):
CaCO3 + 2HCl → CaCl2 + H2O + CO2

This equation tells us that for every 1 mole of CaCO3 reacted, 1 mole of CO2 is produced. We can use the given mass of CaCO3 and the molarity and volume of HCl to determine the number of moles of CaCO3 reacted:

50.0 g CaCO3 × (1 mol CaCO3/100.09 g CaCO3) = 0.4993 mol CaCO3
750 ml HCl × (1 L/1000 ml) × (2.00 mol HCl/L) = 1.50 mol HCl
Since the stoichiometry of the reaction tells us that 1 mole of CaCO3 produces 1 mole of CO2, we can say that 0.4993 moles of CO2 will be produced in this reaction.
To calculate the volume of CO2 produced, we can use the ideal gas law:
PV = nRT
where P is the pressure (in atm), V is the volume (in L), n is the number of moles, R is the gas constant (0.08206 L·atm/mol·K), and T is the temperature (in Kelvin).
We can convert the given temperature and pressure to Kelvin and atm, respectively:
25 °C + 273.15 = 298.15 K
741 torr × (1 atm/760 torr) = 0.975 atm
Plugging in the values, we get:
V = nRT/P = (0.4993 mol)(0.08206 L·atm/mol·K)(298.15 K)/(0.975 atm) = 11.6 L
Therefore, the volume of CO2 produced by the reaction is 11.6 L, measured at 25 °C and 741 torr.
To find the volume of carbon dioxide produced, we need to first determine the limiting reactant and the amount of CO₂ formed. The balanced chemical equation for the reaction between CaCO₃ and HCl is:
CaCO₃ (s) + 2 HCl (aq) → CaCl₂ (aq) + CO₂ (g) + H₂O (l)
1. Calculate the moles of CaCO₃:
Moles = mass / molar mass
Moles of CaCO₃ = 50.0 g / (40.08 + 12.01 + (3 × 16.00)) g/mol = 0.500 moles
2. Calculate the moles of HCl:
Moles = Molarity × volume in liters
Moles of HCl = 2.00 mol/L × 0.750 L = 1.50 moles
3. Determine the limiting reactant:
Since the ratio of CaCO₃ to HCl is 1:2, the limiting reactant is CaCO₃.
4. Calculate the moles of CO₂ produced:
From the balanced equation, 1 mole of CaCO₃ produces 1 mole of CO₂.
Moles of CO₂ = 0.500 moles
5. Calculate the volume of CO₂ at the given conditions using the Ideal Gas Law (PV = nRT):
R = 62.364 L Torr/mol K (Ideal Gas Constant)
Temperature = 25 °C + 273.15 = 298.15 K
Pressure = 741 Torr
Volume = (nRT) / P
Volume of CO₂ = (0.500 mol × 62.364 L Torr/mol K × 298.15 K) / 741 Torr = 12.6 L
Therefore, the volume of carbon dioxide produced at 25°C and 741 Torr is 12.6 liters.

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Answer:

Reactivity! :)

Explanation:

I just took the test! "2.13 Physical and Chemical Changes"

Reactivity is the chemical property of the substance. Therefore, option (C) is correct.

A chemical property can be described as the property that causes a change in the chemical structure of the substance. A chemical property of a substance can be seen in chemical change or reaction in the substance.

A chemical property represents the ability of a substance to combine with other substances or convert into a different product.  The chemical composition is the identity of the substance and on changing it the substance turns into a different substance.

A chemical property gets determined when a change occurs in the chemical identity of the substance. The chemical properties such as toxicity, reactivity, enthalpy of formation, the heat of combustion, oxidation states, radioactivity, etc.

The color, melting point, and boiling point are the physical properties of a substance while reactivity is the chemical property.

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The nucleus of the gold atom has a total charge of 1.26 x 10⁻¹⁷ C.

An atom has a nucleus at the center in which subatomic particles like protons and neutrons are present. The electrons revolve around this nucleus in discrete shells.

Neutrons have no charge on them and hence are neutral while protons are positively charged. Therefore the total charge on the nucleus is solely because of the presence of the protons in it.

In terms of magnitude, one proton has +1.6 × 10⁻¹⁹ C charge on it. Here 'C' stands for coulomb which is the unit of measuring charge.

The atomic number or the total number of protons inside the nucleus of the gold atom is 79.

Therefore, \(\rm Total\ charge\ =\ atomic\ number\times charge\ on\ each\ proton\)

                                        \(\rm = 79\times (1.6\times10^{-19} )\)

                                        \(\rm = 1.26\times10^{-17}\ C\)

So, the nucleus of the gold atom has a total charge of 1.26 x 10⁻¹⁷ C.

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Answer:

0.00025 mole

Explanation:

The number of moles of a substance can be mathematically derived from the following formula

1. mass of substance (in grams)/molar mass of substance (in grams/mole)

2. molarity of substance (in mol/dm3) x volume of substance (in dm3)

In this case, the molarity and volume of NaOH are provided, hence, the second formula will be applicable.

2.5 mL of NaOH was used = 0.0025 dm3

Number of mole of NaOH that was used to neutralize the river water:

  = 0.1 x 0.0025 = 0.00025 mole

The number of mole of NaOH used to neutralize the river water is 0.00025 mole.

The number of moles of water produced cannot be determined without the balanced equation. The mass of precipitate formed is approximately 1.08 grams.

To determine the number of moles of water produced when 1.76 mol of NO2 is given off, we need to know the balanced equation for the reaction. Without that information, it's not possible to provide an accurate answer. Please provide the balanced equation, and I can help you calculate the number of moles of water produced.

For the second part of your question, we have the reaction between sodium phosphate (Na3PO4) and lead(II) nitrate (Pb(NO3)2). The balanced equation for this reaction is:

3 Na3PO4 + 2 Pb(NO3)2 -> Pb3(PO4)2 + 6 NaNO3

From the balanced equation, we can see that the ratio of Na3PO4 to Pb3(PO4)2 is 3:1. Given that 15.0 mL of 0.30 M sodium phosphate solution (Na3PO4) is reacted with 20.0 mL of 0.20 M lead(II) nitrate solution (Pb(NO3)2), we can calculate the moles of each reactant.

Moles of Na3PO4 = (volume in liters) × (molarity)

= (15.0 mL ÷ 1000 mL/L) × 0.30 M

= 0.0045 moles

Moles of Pb(NO3)2 = (volume in liters) × (molarity)

= (20.0 mL ÷ 1000 mL/L) × 0.20 M

= 0.004 moles

Since the ratio of Na3PO4 to Pb3(PO4)2 is 3:1, we can see that 0.004 moles of Pb(NO3)2 will react with 0.004 moles/3 = 0.00133 moles of Na3PO4.

The molar mass of Pb3(PO4)2 can be calculated by adding the atomic masses of lead (Pb), phosphorus (P), and oxygen (O). The molar mass of Pb3(PO4)2 is approximately 811.20 g/mol.

The mass of precipitate formed can be calculated by multiplying the moles of Pb3(PO4)2 by its molar mass:

Mass of precipitate = (moles of Pb3(PO4)2) × (molar mass of Pb3(PO4)2)

= 0.00133 moles × 811.20 g/mol

≈ 1.08 grams

Therefore, approximately 1.08 grams of precipitate will form in this reaction.

Note: It's important to double-check the balanced equation and ensure the stoichiometry is accurate for the calculations.

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Answer:

Power lines produce a magnetic field

Explanation:

Power lines produce a type of magnet called an Electro-magnet which pulls metal magnetic objects towards it and the compass relies on magnetic feilds in order to point north.

Answer:first one

Explanation:

A pure substance has same chemical properties throughout , it cannot be  separated by any means and it is made up of one kind of atom.

These properties are defined as those properties which become evident during or after a chemical reaction after the identity of the substance is changed during chemical reaction.

These properties cannot be determined externally just by viewing the substance ,these change immensely after a substance undergoes a chemical change.These are used for identification of unknown substances and for building up chemical classifications.

The major chemical properties are flammability,toxicity,reactivity,acidity and heat of combustion.For a chemical property to be apparent , it is necessary that the structure of the substance is altered.

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The last third-party candidate to win one or more states was George Wallace of the American Independent Party in 1968.

Who was George Wallace?

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Answer:

need points sorry

Explanation: