A liquid medicine is labeled as having 5% active ingredient, by volume. If
the dosage of the medicine is 50 mL, how much of the active ingredient is
to be ingested? *

Answer:

Explanation:  Ethanol, CH3CH2OH, has the highest of the three boiling points because it has the strongest dipole–dipole forces between molecules due to hydrogen bonding. ... Dimethyl ether, CH3OCH3, has the second- highest boiling point because it has dipole–dipole forces between molecules.

Answer:

[tex]P_{He}=9.06torr[/tex]

Explanation:

Hello there!

In this case, we can identify the solution to this problem via the Dalton's rule because the partial pressure of helium is given by:

[tex]P_{He}=x_{He}P_T[/tex]

Whereas the mole fraction of helium is calculated by firstly obtaining the moles and then the mole fraction:

[tex]n_{He}=8.00g\frac{1mol}{4.00g}=2.00mol\\\\ x_{He}=\frac{n_{He}}{n_{He}+n_{Ar}} \\\\ x_{He}=\frac{2.00mol}{2.00mol+8.60mol}\\\\x_{He}=0.189[/tex]

Then, we calculate the partial pressure as shown below:

[tex]P_{He}=0.189 *48.0torr\\\\P_{He}=9.06torr[/tex]

Best regards!

Answer:

Approximately [tex]0.110\; \rm mol[/tex].

Explanation:

Balanced equation for this reaction:

[tex]\rm PCl_5 + 4\; H_2O \to H_3PO_4 + 5\, HCl[/tex].

Look up the relative atomic mass of [tex]\rm H[/tex] and [tex]\rm Cl[/tex] on a modern periodic table:

Calculate the molar mass of [tex]\rm HCl[/tex]:

[tex]\begin{aligned}&M({\rm HCl}) \\ &= (1.008 + 35.45)\; \rm g \cdot mol^{-1} \\ &\approx 36.46\; \rm g \cdot mol^{-1}\end{aligned}[/tex].

Calculate the number of moles of molecules in that [tex]20.0\; \rm g[/tex] of [tex]\rm HCl[/tex]:

[tex]\begin{aligned}n &= \frac{m}{M} \\ &\approx \frac{20.0\; \rm g}{36.46\; \rm g \cdot mol^{-1}} \approx 0.549\; \rm mol\end{aligned}[/tex].

In the balanced reaction, the coefficient of [tex]\rm H_3PO_4[/tex] and [tex]\rm HCl[/tex] are [tex]1[/tex] and [tex]5[/tex], respectively. The ratio between these two coefficients is:

[tex]\displaystyle \frac{n({\rm H_3PO_4})}{n({\rm HCl})} = \frac{1}{5}[/tex].

In other words, this reaction would produce five times as many [tex]\rm HCl[/tex] molecules as [tex]\rm H_3PO_4[/tex] molecules.

Calculation shows that in this question, approximately [tex]0.549\; \rm mol[/tex] of [tex]\rm HCl[/tex] molecules were produced. Calculate the number of moles of [tex]\rm H_3PO_4[/tex] molecules that were produced:

[tex]\begin{aligned}& n({\rm H_3PO_4}) \\ &= n({\rm HCl}) \cdot \frac{n({\rm H_3PO_4})}{n({\rm HCl})} \\ & \approx 0.549\; \rm mol \times \frac{1}{5} \approx 0.110\; \rm mol\end{aligned}[/tex].

Answer:

Magnetic susceptibility is the degree to which a material can be magnetized in an external magnetic field. If the ratio between the induced magnetization and the inducing field is expressed per unit volume, volume susceptibility (k) is defined as.

Explanation:

good luck

Answer: n= 3, l= 0 , m= 0 and s=[/tex]\frac{-1}{2}[/tex]

Explanation:

Principle Quantum Numbers : It describes the size of the orbital and the energy level. It is represented by n. Where, n = 1,2,3,4....

Azimuthal Quantum Number : It describes the shape of the orbital. It is represented as 'l'. The value of l ranges from 0 to (n-1). For l = 0,1,2,3... the orbitals are s, p, d, f...

Magnetic quantum number :  It describes the orientation of the orbital. It is represented as 'm'. The value of m ranges from -l to +l.

Spin quantum number:  It describes the spin of the electron. It is represented as 's'. The value of s can be +1/2 or -1/2

[tex]F^{2-}:11: 1s^22s^22p^63s^1[/tex]

[tex]F^{3-}:12:1s^22s^22p^63s^2[/tex]

Thus electron enters 3s orbital , thus n= 3, l= 0 , m= 0 and s=[/tex]\frac{-1}{2}[/tex]

Answer:

4.74 g H2

Explanation:

First, balance your reaction:

N2 + 3H2 --> 2NH3

Now convert 26.7 g NH3 to moles NH3 by dividing by its molar mass (17.031 g/mol). Then multiply by the mole ratio of 3 mol H2 for every 2 mol NH3 to get moles of H2. Finally multiply by the molar mass of H2 (2.016 g/mol) to get grams of H2.

26.7 g NH3 • (1 mol NH3 / 17.031 g NH3) • (3 mol H2 / 2 mol NH3) • (2.016 g H2 / 1 mol H2) = 4.74 g H2

Answer:

Yes

Explanation:

Cause the student add wire To the flash and changed colour

Answer: Yes

Explanation: Because the color changed and one of the ways to see if a chemical reaction occured is color change.

E⁣⁣⁣⁣xplanation i⁣⁣⁣⁣s i⁣⁣⁣⁣n a f⁣⁣⁣⁣ile

bit.[tex]^{}[/tex]ly/3a8Nt8n

Answer:

615 g

Explanation:

In order to convert from moles of any given substance into grams, we have to use said substance's molar mass, as follows:

Thus, we now calculate the molar mass of beryllium iodide, BeI₂, using the molar masses of the elements:

Finally we calculate how many grams are there in 2.34 moles of BeI₂:

Answer:

Chemical property is a characteristic of a particular substance that can be observed in a chemical reaction.

Explanation:

Hope this helps :)

Answer:

A chemical property is any of a material's propertiesthat becomes evident during, or after, a chemicalreaction; that is, any quality that can be established only by changing a substance's chemical identity. ... They can also be useful to identify an unknown substance or to separate or purify it from other substances.

Answer:

b

Explanation:

reverse the first reaction

multiply the second by 5

multiply the third by 3

3244.8-1967.5-1450.5=-173.2

Answer:

mixture of colours answer

Answer:

pressure must remain constant

Explanation:

charles law= V/T

where pressure remains constant

If Charles' law is to be applied to a given sample of a gas, then it must have constant pressure.

Gas law are the hypothesis which tells about the behavior of gas at different conditions.

According to the Charles' Law, volume of the gas at any constant pressure and no. of moles of gas is directly proportional to the temperature of the gas at that condition. Charles' law is represented as:

V ∝ T, where

V = volume of gas

T = temperature of gas

Hence option (a) is correct i.e. pressure.

To know more about Charles' Law, visit the below link:

https://brainly.com/question/26725812

Answer:

hydrophobic: tending to repel or fail to mix with water.

hydrophylic​: having a tendency to mix with, dissolve in, or be wetted by water.

Hope it helps!!!

Answer:

endothermic reactions

Explanation:

Endothermic reactions are those reactions that absorbs heat from the surroundings as opposed to the exothermic reaction that releases heat energy. This heat absorption that characterizes endothermic reactions causes the surrounding to be cool.

However, in an endothermic reaction, more energy is needed to be absorbed in order to break the bonds of the reactants to form products, hence, making the activation energy of endothermic reactions HIGHER.

Answer:

B or 0.1538

Explanation:

Remark

For every mol of NaN3 that decomposes, 3 mols of N2 are produced.

10000 mg = 10 grams

NaN3 = 23 + 3*14

NaN3 = 23 + 42

NaN3 = 65

So set up the following proportion

10 grams / 65 = x /1      Cross multiply

10 * 1 = 65 x                  Divide by 65

x = 10 / 65

x = 0.1538 moles   which is B I think

Answer:

186 mL HCl

Explanation:

M1V1 = M2V2

M1 = 0.215 M HCl

V1 = ?

M2 = 0.800 M NaOH

V2 = 50.0 mL

Solve for V1 --> V1 = M2V2/M1

V1 = (0.800 M)(50.0 mL) / (0.215 M) = 186 mL HCl

Answer:

NO

Explanation:

Water and N₂ cannot be the answer because they are products of the reaction, not reactants.

The fact that some ammonia (NH₃) is left in the container once the reaction is finished tells us that NH₃ is the reactant in excess.

The remaining reactant is thus the limiting reactant. The correct answer is NO.

Answer:

The freezing point depression can be calculated using the pure solvent freezing point and the molality of the solution.

At the freezing point, the vapor pressure of both the solid and liquid form of a compound must be equal.

The freezing point of a substance is the temperature at which the solid and liquid forms are in equilibrium.

To reattain equilibrium, the freezing point of the solute and solvent mixture is lowered relative to the original pure solvent.

Answer:

False.

Explanation:

The given statement asserts a false claim because the equator is the region that receives maximum sunlight. The equator is placed right below the sun and thus, it tends to receive the maximum radiation across the year. While the poles are the coldest regions of the Earth because due to Earth's titled axis, they receive very few sun rays for a certain time of the year. Thus, if we move away from the equator, we are likely to receive less radiation from the sun as the sun keeps getting farther while moving away from the equator.

Answer:

bcs the oven heated it up?

Explanation:

Answer:

A -  Nitrile compound

B-   AlkylAmine

C-   Alcohol

D -  Alkene

Explanation:

(A) undergoes reduction to form alkylamine.

(B) is a primary alkyl amine which on carbylamine test gives a foul smell.

(B) reacts with NaNO2 + HCl undergoes diasotisation following which alcohol is produced.

(C) being a alcohol undergoes hydrolysis to give alkene.

(D) On further reaction with H2S04 by the rule of Markownikoff rule it forms a isomer of (C).

Answer:

Synthesis Reaction

Explanation:

Here we see H2 and O2 are being combined H2O. Synthesis reactions are where we see a combination to make a single product.

So here it'd be A + B =AB

2Na(s)+Cl2(g)→2NaCl(s)

Decomposition would be the break down of a compound into 2, the opposite of synthesis.

AB = A + B

2HgO(s)→2Hg(l)+O2(g)

Single replacement is where  1 element replaces another in a reaction, or switches place with 1 element.

AY + B = A + BY

2 HCl(aq) + Zn(s) → ZnCl2(aq) + H2(g)

Double replacement is similar but 2 elements are switch/replaced.

AY + BX = AX + BY

CuCl2(aq) + 2 AgNO3(aq) → Cu(NO3)2(aq) + 2 AgCl(s)

Answer:

The reaction given is  

Chemistry homework question answer, step 1, image 1

Since in equilibrium constant expression, the concentration of liquid components is not written.

Hence the equilibrium constant expression for the above reaction can be written as  

Chemistry homework question answer, step 1, image 2

where [NO] = equilibrium concentration of NO

[NO2 ] = equilibrium concentration of NO2

[HNO3 ] = equilibrium concentration of HNO3

Step 2

Given : mass of NO at equilibrium = 18.6 g

mass of NO2 at equilibrium = 15.1 g

and mass of HNO3 at equilibrium = 13.1 g

Since molar mass of HNO3 = 63 g/mol, molar mass of NO = 30 g/mol and molar mass of NO2 = 46 g/mol

Hence the moles of gases at equilibrium are

Chemistry homework question answer, step 2, image 1

Step 3

Since mass of solution = mass of HNO3 + mass of water = 13.1 + 234.8 = 247.9 g

Assuming density of solution = density of water = 1.00 g/mL

=> mass of solution = volume of solution X density of solution  

=> 247.9 = 1.00 X volume of solution  

=> volume of solution = 247.9 mL = 0.2479 L      

Explanation:

The standard cell potential of this reaction is obtained from the calculations as 3.21 V

An electrochemicall cell is onee in which electrical energy is produced from a chemical reaction. A cell reaction is sponteanous of the standard cell potential is positive.

Now;

E∘cell = E∘cathode - E∘anode

E∘cathode = 0.34 V

E∘anode = (-2.87 V)

E∘cell = 0.34 V - (-2.87 V) = 3.21 V

Learn more about electrode potential: https://brainly.com/question/11256472?r

Answer:

Sea breeze moves from the areas of higher pressure on the water in the direction of the areas of lower pressure on land.

Explanation:

Sea breeze moves from the areas of higher pressure on the water in the direction of the areas of lower pressure on land. Whereas, land breeze blows from the areas of higher pressure on land to the areas of lower pressure on water.

.Answer:

2kclo3 --> 2kcl + 3o2 is a decomposition reaction because it is breaking apart (thinks decompose- to break apart/down)

H2 + I2 --> 2HI is a synthesis reaction because synthesis is like creation/ building

think DNA synthesis or the book of genesis in the bible about creation

2 Na + 2 H20 --> NaOH + H2 --- not balanced at all

other one is a balanced equation- the Zn + 2HCl one

Explanation: