You mix the sample discussed in the previous two questions with another sample, which you know to be pure acetylsalicylic acid. You grind the mixture thoroughly with a mortar and pestle, and do a melting point determination on the mixed product. You now observe melting over a range of 127 to 133 C. Now what conclusions can you reach regarding the original product

Answers

Answer 1

Answer:

Having high melting point.

Explanation:

The original product has high melting point as compared to the mixture product because in the original product, the element is present in its pure state and we know that pure substances have high melting point as compared to mixture substances due to the presence of strong intercellular forces between them which is hard to break so that's why we can say that the original product has high melting point.


Related Questions

tính chất hoá học của Cu

Answers

Answer:

các oxit đồng khi nó tiếp xúc với không khí. nó phản ứng đặc biệt với oxy trong không khí (không phải hơi ẩm), và tạo ra nấm mốc

which orbital has the lowest energy

Answers

Answer:

s orbital

Explanation:

it has the lowest energy because

Paulis law state that orbitals with lower energy must be fill first before that of higher energy

and the s orbital is filled first

CaCO3 + 2HCl > CaCl2 + CO₂ + H₂O​

Answers

Explanation:

This reaction is also known as double decomposition reaction.

HCl + CaCO3 + MgCO3 → H2O + H2 + CO2 + CaCl2 + MgCl2


I’m screwed omg i totally forgot I have school today and forgot to do this someone help me rq I’ll brainlist plslsls be awake just make sure you write the word equation for each of the following metal oxidation reactions or if you can, also write a chemical equation below it. idrm bout that but it’ll be really nice if u did.


tried doing it and if ur one of the smart people that can do science unlike me surely u’ll help. ☺️

Answers

Answer:

Zn + O2 = ZnO

Mg + O2 = MgO

Cu + O2 = CuO

Al + O2 = Al2O3

Explanation:

I need help on this question asap!
You are in a lab and you use 11.50 g of Na(s) to react with Cl(g). Below is the reaction that happens from this.

Na + Cl2 → NaCl

Your percent yield is 95%. From this info what is the actual yield?

Answers

Answer:

27.79 g to the nearest hundredth.

Explanation:

2Na + Cl2 ---> 2NaCl

Using the molar masses , the theoretical yield is:

46 g of Na yields  46 + 35.5*2 g NaCl

46 g ---> 117 g NaCl  so

11.5 g ----> 117 * 11.5 / 46 g NaCl

But, as the yield is 90%

the actual yield is 0.95 * 117 * 11.5 / 46

= 27.79 g.

9.

Look at the following equation. What is the oxidizing agent? 3Mg + N2 ->Mg3N2

Answers

Answer:

In this reaction, nitrogen acts as the oxidizing agent. Mg is a reducing agent.

PLZ HELP What human body system includes the stomach, intestines, and teeth?
A. Respiratory system
B. Digestive system
C. Skeletal system
D. Muscular system SUBMIT​

Answers

Answer:

B

Explanation:

the digestive system

Water is super soluble and this solubility is incredibly helpful for life. Tell me how this solubility helps maintain different processes when it comes to life.

Answers

Answer: Water is SUPER soluble and regarded as an universal solvent because it is polar in nature and dissolves most inorganic solutes and some polar organic solutes to form aqueous solutions.

Explanation:

WATER is a substance which is composed of the elements such as hydrogen and oxygen that are combined in the ratio of 2:1. The physical properties of water include:

--> it is a colourless, odourless and tasteless liquid and

--> the boiling point of water is 100°C(this is due to the presence of hydrogen bonding).

The solubility of a solute in a solvent at a particular temperature is the maximum amount of solute in moles or grams that will saturate 1000 dm³ or grams of the solvent.

Water is regarded as a universal solvent BECAUSE it is capable of dissolving many substances. This solubility helps maintain different processes in life such as acting as the solvent which helps cells transport and use substances like oxygen or nutrients.

hii pls help me to balance the equation thanksss​

Answers

▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓

[tex]\boxed{\pmb{\color{gold}{\sf{2SO_{2}(g) + O_{2}(g)\dashrightarrow 2SO_{3}(g)}}}}[/tex]

▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓

[tex]\boxed{\sf {2SO_2\atop Sulphur\:DiOxide}+{O_2\atop Oxygen}\longrightarrow {2SO_3\atop Sulphur\:trioxide}}[/tex]

On reactant side:-

Sulphur=2atomsOxygen=6atomsOn products side:-

Sulphur=2atomsOxygen=6atoms

Hence balanced.

What is the formula for the compound iodine trichoride?

Answers

Answer:

Cl 3 I

Explanation:

Molecular Weight. 233.36. Appearance. Red-orange to brown powder or chunks. Melting Point. 63 °C

What is the molarity of a sodium chloride solution that has 2.0 mol of
sodium chloride dissolved in 0.25 L of water? Answer to two
significant figures.

Answers

Answer:

[tex]\boxed {\boxed {\sf 8.0 \ M \ NaCl}}[/tex]

Explanation:

Molarity is a measure of concentration in moles per liter, therefore the formula is:

[tex]molarity= \frac{moles \ of \ solute}{lites \ of \ solution}[/tex]

There are 2.0 moles of solute or sodium chloride dissolved in 0.25 liters of water or solution.

moles of solute = 2.0 mol NaCl liters of solution = 0.25 L

Substitute these values into the formula.

[tex]molarity= \frac{ 2.0 \ mol \ NaCl}{0.25 \ L}[/tex]

Divide.

[tex]molarity=8 \ mol \ NaCl / L[/tex]

Molarity is measured in molars or M. 1 molar is equal to 1 mole per liter, so our answer is equal to 8 molars.

[tex]molarity= 8 \ M \ NaCl[/tex]

The original measurements of moles and liters have 2 significant figures, so our answer must have the same. For the number we calculated, that is the tenths place. There are no numbers to round, so we add a 0 in the tenths place.

[tex]molarity= 8.0 \ M \ NaCl[/tex]

The molarity of the solution is 8.0 M NaCl.

The number of joules required to heat one gram of a substance one degree Celsius is _____.


endothermic

temperature

exothermic

specific heat capacity

Answers

The answer is D - specific heat capacity.

how would you detect sulphur in organic compounds​

Answers

Answer:

sodium fusion is changed to sodium sulphide if sulphur is present in the compound

Cuales son los tipos de yemas

Answers

Tipos de yemas son terminal, cuando está ubicada en la punta de una ramilla;
axilar, cuando está ubicada en la axila de una hoja (también denominadas laterales);
adventicia, cuando ocurre en los demás lugares, por ejemplo en el tronco o en las raíces.

PLZ HELP Matthew wants to study how the body responds when the skin is broken. He learns that particles in the blood clump together at the site of the wound to stop the bleeding while the skin heals. Which of the following body systems is involved in carrying the blood to the site of the wound?
A. Cardiovascular
B. Skeletal
C. Respiratory
D. Muscular​

Answers

Answer:

A, Cardiovascular system

cardiovascular system

Teniendo en cuenta la imagen anterior responde las siguientes preguntas:

1. ¿Cuál es la tendencia general de la electronegatividad a lo largo de un periodo? a. Aumentar

b. Disminuir

c. La electronegatividad es igual en todos

d. no hay ninguna tendencia

2. Ordene los átomos siguientes de menor a mayor electronegatividad: Li, Ca, C y Se a. Li
b. Se
c. Ca
d. Se
3. ¿Cuál de los átomos siguientes es el que posee mayor potencial de ionización? a. P

b. Sb

c. As

d. N

4. De las siguientes definiciones, ¿Cuál se acerca más a lo que es la electronegatividad? a. Es la tendencia relativa que presenta un elemento a atraer hacia si electrones b. Es la tendencia relativa de un átomo en estado gaseoso a repeler los electrones c. es la carga negativa que representa una unión

d. es la diferencia entre el potencial de ionización y la afinidad electrónica de un elemento. rapido es para hoy

Answers

1. La tendencia general de la electronegatividad durante un período es que la electronegatividad aumenta durante un período

La opción correcta es a. Incremento

Razón

El número de electrones de valencia aumenta durante un período, por lo

que aumentar la tendencia del átomo a lograr la estructura de octeto

estable requiriendo atraer (cada vez menos a medida que avanzamos por

el período desde la izquierda a la derecha) compartieron electrones

cuando se forman enlaces, lo que  aumenta electronegatividad

2. El orden de electronegatividad creciente es Li → Ca → C → Se

Razón

La electronegatividad aumenta a lo largo del período y disminuye en el grupo.

Las ubicaciones de los elementos dados son;

Litio, Li; Grupo 1 período 2 Calcio, Ca; Grupo 2 período 4 Carbono, C; Grupo 14 período 2 Selenio Se; Grupo 16 período 4

Primero escribimos los elementos con los números de grupo más altos,

que son Se y C, después de lo cual tenemos Ca, luego Li, por lo tanto, en

orden creciente, obtenemos;

Li → Ca → C → Se

3. La opción correcta es d. N (nitrógeno)

Razón

El potencial de ionización representa la energía necesaria para eliminar un electrón de un átomo.

El potencial de ionización disminuye en un grupo y aumenta a lo largo de un período de izquierda a derecha.

Tenemos;

Fósforo, P; Grupo 15 período 3 Antimonio, Sb; Grupo 15 período 5 Arsénico, As; Grupo 15 período 4 Nitrógeno, N; Grupo 15 período 2

Por lo tanto, el elemento con mayor potencial de ionización es aquel que se encuentra en la posición más alta en el grupo 15 entre los elementos dados, que es el nitrógeno, N

4. La opción correcta para la definición de electronegatividad es la opción (a);

un. Es la tendencia relativa de un elemento a atraer electrones hacia sí mismo.

Razón

La electronegatividad es la capacidad relativa de un elemento dado para atraer electrones compartidos hacia sí mismo.

Por lo tanto, la opción correcta es a. es la tendencia relativa de un elemento a atraer electrones hacia sí mismo

Obtenga más información sobre la electronegatividad y la energía de ionización aquí;

https://brainly.com/question/13961537

Chemistry!! Help me! And explain step by step!

Answers

1st part is ure answer --> 2M

Given mass -> 58 grams

mass of NaCl -> 58.44 approx -> 58 any

moles given-> 1 moles

[tex]Molarity = \frac{moles}{vol \: in \: lts} [/tex]

[tex]Molarity = \frac{1}{0.5} = \frac{10}{5} \\Molarity = 2M[/tex]

10. As electrons move through the electron-transport chain,
they lose energy, which is used to form
O A. NAD.
O B. ADP
O C. ATP.
O D. GBP

Answers

Answer:

C. ATP.

Explanation:

During the process of aerobic cellular respiration, energy is said to be released in three main stages: glycolysis, Krebs cycle and oxidative phosphorylation (electron transport chain). The electron transport chain produces the most energy and it involves the transfer of electrons through series of complex proteins.

As the electrons move through the individual complexes, energy is lost to form a proton gradient (H+). The proton gradient powers the synthesis of ATP from ADP as catalyzed by ATP synthase.

What mass of helium gas (in g) occupies 15.3 L at STP?

Answers

Answer:

[tex]\boxed {\boxed {\sf 2.73 \ g \ He}}[/tex]

Explanation:

We are asked to find the mass of helium gas given a volume.

1. Convert Liters to Moles

1 mole of any gas occupies a volume of 22.4 liters. So, 1 mole of helium gas contains 22.4 liters of helium. Create a ratio using this information.

[tex]\frac {1 \ mol \ He }{ 22.4 \ L \ He}[/tex]

We are converting 15.3 liters of gas to moles, so we multiply by that value.

[tex]15.3 \ L \ He *\frac {1 \ mol \ He }{ 22.4 \ L \ He}[/tex]

The units of liters of helium (L He) cancel.

[tex]15.3 *\frac {1 \ mol \ He }{ 22.4}[/tex]

[tex]\frac {15.3}{22.4} \ mol \ He[/tex]

[tex]0.6830357143 \ mol \ He[/tex]

2. Convert Moles to Grams

The molar mass is the mass of 1 mole of a substance. These values are found on the Periodic Table as atomic masses, but the units are grams per moles. Look up the molar mass of helium.

He: 4.0026 g/mol

Create another ratio using the molar mass.

[tex]\frac {4.0026 \ g \ He}{1 \ mol \ He}[/tex]

Multiply by the number of moles we calculated.

[tex]0.6830357143 \ mol \ He *\frac {4.0026 \ g \ He}{1 \ mol \ He}[/tex]

The units of moles of helium (mol He) cancel.

[tex]0.6830357143*\frac {4.0026 \ g \ He}{1 }[/tex]

[tex]2.73391875 \ g \ He[/tex]

3. Round

The original measurement of volume has 3 significant figures, so our answer must have the same.

For the number we calculated, that is the hundredths place.

The 3 in the thousandths place to the right (2.73391875) tells us to leave the 3 in the hundredths place (2.73391875).

[tex]2.73 \ g \ He[/tex]

15.3 liters of helium gas is approximately 2.73 grams of helium.

Im sorry if its difficult to read


we dont talk about how I messed up my first question and jad to make another one because im slow​

Answers

Answer:

A ball is thrown straight up from a rooftop 320 feet high. The formula below describes the ball's height above the ground, h, in feet, t seconds after it was thrown. The ball misses the rooftop on its way down and eventually strikes the ground. How long will it take for the ball to hit the ground? Use this information to provide tick marks with appropriate numbers along the horizontal axis in the figure shown.

h=-16t^2+16t+320

Having a control group is important when doing an investigation why?

Answers

Answer:to help understand the stuff more

Explanation:

Mark Brainliest please

Answer :

Dependent variable depends on the independent variable. ... In a control group in an experimental investigation the independent variable is omitted. Thus the goal is to test if the dependent variable shows any change in the absence of the independent variable.

ASAP
Which of the following describes a characteristic of water that makes it cohesive in nature?

A - It has a partial negative charge on hydrogen and a partial positive charge on oxygen.
B - It has a linear molecular structure with H-O-H arranged in a straight line.
C - It has a vast electronegativity difference between its constituent atoms.
D - It requires a high amount of heat to raise or drop its temperature.

Answers

The answer is C.

The vast difference in electronegativity of the oxygen and hydrogen in water, the O-H bond is polar.

The characteristic of water that makes it cohesive in nature is that It has a vast electronegativity difference between its atoms. So, option C is correct one.

Why water is cohesive in nature?

The water molecule contains two hydrogen atoms and oxygen atom.

The electronegativity of hydrogen atoms and oxyegen atom is 2.1 and 3.44

Due to high electronegativity of oxygen ,it can attract the bonded pair of electron of hydrogen and form a strong bond and make it cohesive in nature.

What are major characteristics of water?

The water molecule have unique characteristics among all some are given below.

Water is polar, with partial positive charge on two hydrogen and partial negative charge on one oxygen.

Water is act as solvent and dissolves the polar and ionic substance.Water has high heat of vaporization.Water has cohesive and adhesive properties.Water has high heat capacity.

learn about water molecule Here,

brainly.com/question/26529979

#SPJ2

list four quantum no. that defines energy state of the electron in hydrogen along with their possible values and explain their significance in terms of orbitals?

Answers

principal quantum number
magnetic quantum number
subsidiary quantum number
spin quantum number


Which of these solutions is acidic?

Answers

Answer:

Option a is a solution acidic ([OH⁻] = 7.0x10⁻⁹ M).

Explanation:

To know if a solution is acidic we need to calculate the pH and it must be lower than 7. A value of pH equal to 7 is a neutral solution and a solution with a pH value higher than 7 is a basic solution.

a. For the [OH⁻] = 7.0x10⁻⁹ M we have:

[tex] pOH = -log[OH^{-}] = -log(7.0 \cdot 10^{-9}) = 8.15 [/tex]

Now, the pH is:

[tex] pH + pOH = 14 [/tex]

[tex] pH = 14 - pOH = 14 - 8.15 = 5.85 [/tex]

This solution is acidic (pH < 7)

b. [H₃O⁺] = 8.5x10⁻⁸ M

[tex] pH = -log(8.5 \cdot 10^{-8}) = 7.07 [/tex]

This is not an acidic solution. Is a neutral one (pH around to 7).

c. [OH⁻] = 2.5x10⁻⁶ M

[tex] pOH = -log[OH^{-}] = -log(2.5 \cdot 10^{-6}) = 5.60 [/tex]

Then, the pH is:

[tex]pH = 14 - pOH = 14 - 5.60 = 8.40[/tex]

Hence, this is not an acidic solution. It is basic (pH > 7).    

Therefore, option a is a solution acidic ([OH⁻] = 7.0x10⁻⁹ M).

I hope it helps you!

A solution, such as pure water, with a pH of 7 contains which of the following?

a. Dissolved CO2

b. Equal amounts of hydrogen ions and hydroxide ions

c. Smokestack pollutants such as sulfur dioxide

d. Sodium hydroxide

Answers

Answer:

B

Explanation:

Pure water always has equal concentrations of hydrogen and hydroxide ions.

1125 J of energy is used to heat 250 g of iron to 55 °C. The specific heat capacity of iron is 0.45 J/(g·°C).

What was the temperature of the iron before it was heated?

55 °C
55 °C

35 °C
35 °C

45 °C
45 °C

20 °C

Answers

Answer:

45 °C.

Explanation:

From the question given above, the following data were obtained:

Heat (Q) = 1125 J

Mass (M) = 250 g

Final temperature (T₂) = 55 °C

Specific heat capacity (C) = 0.45 J/gºC

Initial temperature (T₁) =?

The initial temperature of the iron can be obtained as illustrated below:

Q = MC(T₂ – T₁)

1125 = 250 × 0.45 (55 – T₁)

1125 = 112.5 (55 – T₁)

Divide both side by 112.5

1125/112.5 = 55 – T₁

10 = 55 – T₁

Collect like terms

10 – 55 = –T₁

–45 = –T₁

Multiply through by –1

45 = T₁

T₁ = 45 °C

Therefore, the initial temperature of the iron is 45 °C

Select the correct answer.
Which statement accurately describes natural selection?
A.
It ensures that 100 percent of beneficial traits will pass on to the next generation.
B.
It ensures that all individuals with harmful traits are unable to reproduce.
C.
Individuals with beneficial traits are more likely to successfully reproduce than those with harmful traits.
D.
Individuals are all equally likely to successfully reproduce, but the genome will mutate to erase harmful traits.

Answers

Answer:

D .

Explanation:

Individuals are all equally likely to successfully reproduce, but the genome will mutate to erase harmful traits.

Enolase, an enzyme that catalyzes the conversion of 2-phosphoglycerate to phosphoenolpyruvate: Group of answer choices demonstrates a base-catalysis step, where a proton is removed from the substrate. demonstrates an acid-catalysis step, where a proton is added to the substrate. requires two Mg2 cofactors and as such demonstrates metal-ion catalysis. stabilizes the intermediate and transition

Answers

Answer:

Requires two Mg²⁺ cofactors and as such demonstrates metal-ion catalysis

Explanation:

Electrostatic catalysis or metal ion catalysis is a catalytic mechanism that makes use of metalloenzymes, such as enolase along with a metal ion which is bound tightly, including, Mo⁶⁺, Ni³⁺, Co³⁺, Mn²⁺, Zn²⁺, Cu²⁺, and Fe²⁺, to undertake a catalysis

For maximal activity, enolase requires the presence of 2 equivalent metal ions in each site which is active

Therefore, the correct option is; requires two Mg²⁺ cofactors and as such demonstrates metal-ion catalysis

The process during which cells of the body harness energy from food consumed by a living organism is ______________________.

Answers

It is called Cellular Respiration

A car of 1200 kg is moving with a speed of 36 Km/hr. It is stopped by applying brakes withion with in 5 seconds. Calculate the amount of force required to stop the car.

Answers

Answer:

–2400 N

Explanation:

This is a physics question. However, the answer to the question is given below.

We'll begin by converting 36 Km/hr to m/s. This can be obtained as follow:

3.6 Km/hr = 1 m/s

Therefore,

36 Km/hr = 36 Km/hr × 1 m/s / 3.6 km/hr

36 Km/hr = 10 m/s

Thus, 36 Km/hr is equivalent 10 m/s.

Next, we shall determine the acceleration of the car. This can be obtained as follow:

Initial velocity (u) = 10 m/s

Final velocity (v) = 0 m/s

Time (t) = 5 s

Acceleration (a) =?

a = (v – u) / t

a = (0 – 10) / 5

a = – 10 / 5

a = –2 m/s²

Finally, we shall determine the force required to stop the car. This can be obtained as follow:

Mass (m) = 1200 Kg

Acceleration (a) = –2 m/s²

Force (F) =?

F = ma

F = 1200 × –2

F = –2400 N

NOTE: The negative sign indicate that the force is in opposite direction to the motion of the car.

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If mAngleVUW = (4x + 6) and mAngleWUT = (6x 10), what is the measure of AngleWUT? PLEASE I NEED HELP RIGHT NOW Select the graph that correctly translates (x) = |x| 4 units in the negative x-direction and 3 units in the positive y-direction.answers are the pictures Find the missing side length in the image below What is meaning of favorite A conical lids height is 2 centimeters less than the radius, x, of its base. If the lid is made of 25 cubic centimeters of clay, the equation x3 +? x2 +? = 0 can be used to find that the radius of lids base is centimeters. help asap pleaseeee asap please need this ASAP write a passage describing a car crash please do not copy from online Researchers wanting to assess skin irritation associated with a new sunscreen developed for those with photosensitivity. They randomly sample 240 men with a history of photosensitivity and 240 men without a history of photosensitivity and ask them to apply the cream and report the level of skin irritation they experience after spending 20 minutes in the sun using a scale of 0-10. The average skin irritation score for the group with a history photosensitivity was 1.2 and the average skin irritation score for the group without a history of photosensitivity was 1.4. The Levene's test for equality of variances had a p value of 0.08. You know this means:A. The researchers should report the t test results assuming equal variances. Select The researchers should report the t test results NOT assuming equal variances. as your answerB. The researchers should report the t test results NOT assuming equal variances.C. The researchers should reject the null hypothesis and report there is a difference in the average skin irritation score.D. The researchers should fail to reject the null hypothesis and conclude there is NOT a difference in the average skin irritation score. I need help with this question pls! Which of the following is NOT a factor toward the end of the frontier imagine? What is one important way that stelae were used?A) for trade with other groups of peopleB) as weapons in warsC) to record information about the growing seasonsD) all of the above 1. What component of fitness does yoga fall under?FlexibilityCardiovascular EnduranceMuscular Strength the positions of two villages A and B. Village B is 100km away and on a bearing of 083 from village A. a) Calculate the bearing of A from B We are again studying the times required to solve two elementary math problems. Suppose we ask four students to attempt both Problem A and Problem B. Assume the students are independent and all results are normally distributed, but note that a particular student's times on the two questions are likely to be positively correlated. The results are presented below (in seconds). student Problem A Problem B 1 20 35 2 30 40 2 3 15 20 4 40 50 Again find a two-sided 95% CI for the difference in the means of A and B. PLEASE HELP ME PLEASE PLEASE Torren deposits $4500 in an account earning 2% interest, compoundedannually. The equation that represents this situation is:A(n) = 4500(1 + 0.02)" - 1How much will he have in the account at the beginning of year 9? Round youranswer to the nearest dollar. Culture as an Iceberg illustrates 3 levels of culture: Cultural Makeup That Is Visible, Cultural Makeup We Are Aware Of, and Cultural Makeup We are Unaware Of. These three dimensions of the cultural iceberg are made up subjective and objective components. Discuss the following: Discuss one subjective and one objective dimensions of culture from each level. Explain how leaders are challenged to pay attention to these dimensions. What is the outcome if they choose to ignore these dimensions The answer to this question please. What do Some harm might come to him mean? Completa el espacio en blanco con la mejor respuesta con subjuntivos (subjunctives)Yo me sentira ms tranquila si t te_____de ah. (bajar)bajesbajarasbajarbajarte Find the perimeter of the figure below, in inches