2. A chemical's flash point is the​

Answers

Answer 1
Flash point is the minimum temperature at which a liquid forms a vapor above its surface in sufficient concentration that it can be ignited.

Related Questions

For each of the environments below: (1) identify your system and surroundings and (2) predict whether it would be endothermic or exothermic.a.Wood burningSystem:Surroundings:Enthalpy Change:b.Water freezingSystem:Surroundings:Enthalpy Change:c.Sweat evaporatingSystem:Surroundings:Enthalpy Change:d.Chemical hand-warmerSystem:Surroundings:Enthalpy Change:

Answers

Answer:

A) Wood burning

system : Wood.

surroundings : atmosphere

Enthalpy : Exothermic

B) Water Freezing system

System : Refrigerator

surroundings :  water in the refrigerator

enthalpy change : Endothermic

C) Sweat evaporating

System :  Human being

surroundings : Air nearby

Enthalpy change : exothermic

D) Chemical Hand-warmer

system : Hand warmer pack

Surroundings : human palms

Enthalpy Change : Exothermic

Explanation:

A) Wood burning

system : Wood

surroundings : atmosphere

Enthalpy : Exothermic

This system give away energy to its surroundings hence its enthalpy change is exothermic

B) Water Freezing system

System : Refrigerator

surroundings :  water in the refrigerator

enthalpy change : Endothermic

The system absorbs heat from what is put inside(surroundings ) of it hence this is na endothermic system

C) Sweat evaporating

System :  Human being

surroundings : Air nearby

Enthalpy change : exothermic

This is an exothermic reaction ( enthalpy change ) because the system gives out heat to the surrounding

D) Chemical Hand-warmer

system : Hand warmer pack

Surroundings : human palms

Enthalpy Change : Exothermic

There is movement of heat from the system to the surrounding hence it is an exothermic reaction

Theses are all the points
I have left

Would you rather Go to jail for the rest of your life or go to prison for the rest of you life?

Answers

Uhhhh... iD rAtHeR gO tO pRiSoN

Thanks for the points!!! ( ^ω^ )

Answer:

I honestly don't know but I hope you get more points! ;D

Explanation:

- Rachel performed an investigation to study the thermal conductivity of four different materials. She started with four identically shaped rods—each made of a different material. Then, she placed one end of each rod into a pot of boiling water, which was at 100°C.

- After five minutes, Rachel measured the temperatures of the ends of the rods that were sticking up out of the pot to see whether they got hot. Her results are shown below.

Thermal Conductivity Investigation
Material Temperature of End of Rod After 5 Minutes
Material 1 41°C
Material 2 53°C
Material 3 98°C
Material 4 59°C

- Rachel knows that one of the materials is copper and that copper conducts thermal energy very well. Which of the materials is most likely copper?


A.
material 1
B.
material 3
C.
material 4
D.
material 2

Answers

Answer:

I will have the maths book

Answer:98

Explanation:

29. Which is the electron configuration of an atom
in the excited state?
(1) 1s 2s²2p2
(2) 1s 2s22p'
(3) 1s 2s22p5352
(4) 1s²2s²2p%35'

Answers

2 is right am 70 percent sure

2Na(s) + Cl2(g) - 2NaCl(s) + 822 kj

Answers

Answer:

Is there any other part to this question? If not I'm pretty sure the answer is 205.5 kJ

Explanation:

Answer:

822 kJ; 411 kJ/mol.

Explanation:

A chemist measures the enthalpy change during the following reaction: ()()()Use this information to complete the table below. Round each of your answers to the nearest kJ/mol. 1. ()()()Solution:  given reaction is 2Na + Cl2 --> 2NaCl         delta H = -822 KJ 1) 1/2Na + 1/4Cl2 --> 1/2NaCl divide the coficiant of given.

Which substance is soluble in water?

Answers

Things like salt, sugar and coffee dissolve in water. They are soluble. They usually dissolve faster and better in warm or hot water. Pepper and sand are insoluble, they will not dissolve even in hot water.

How do chemists count the number of representative particles in a substance?

Answers

The mole allows chemists to count the number of representative particles

A gas goes from 1L at 273 K to 2 L when heated. What is the new temp?

Answers

Answer:

Given : Diatomic molecule at 273K

'q' absorbed = positive = +100Cal = 100 x 4.184J = 418.4J

'W' done by system = negative = -209J

By first law of thermodynamics;

ΔU = q + W = 418.4 + (-209) = 209.4J

We know for diatomic molecule Cv=25R and CvΔT=ΔU

CvΔT=209.4

 25RΔT=209.4

ΔT=5R209.4×2

And, Heat exchange=Cm×ΔT 

where; Cm is molar heat capacity

Cm=ΔTHeat Exchange

substituting values for Heat Exchange = 418.4 and ΔT=5R209.4×2

Cm=5R

What lives in the arctic tundra biome? Choose all that apply.

Use this website to answer the question: https://thewildclassroom.com/biomes/artictundra-2/
Question 6 options:

caribou


reptiles


amphibians


lots of insects


muskox


reindeer

Answers

Answer: Animals found in the Arctic tundra include herbivorous mammals (lemmings, voles, caribou, arctic hares, and squirrels), carnivorous mammals (arctic foxes, wolves, and polar bears), fish (cod, flatfish, salmon, and trout), insects (mosquitoes, flies, moths, grasshoppers, and blackflies), and birds (ravens, snow buntings

The lives in Artic tundra biome is caribou.

What is arctic tundra biome?

Artic tundra biome is the northernmost biome, which covers the land of the arctics with the ice caps.

Climate of this Artic tundra biome is almost cold means the temperature in winter season of this region is about -34 degree celsius. In this region small animals like Norway lemmings as well as large animals like caribou are present which have high amount of fat to rescue from the cold.

Hence, option (a) is correct.

To know more about Artic tundra biome, visit the below link:
https://brainly.com/question/16056049

Help me! Who ever gets to answer and has the best answer gets brainliest (very easy!)

Answers

Fire-3
Decay-1
Earth-2

Answer:

Fires --> These consume fuel and convert chemical energy stored in that fuel into thermal light and sound energy.

Decay -->The breakdown of dead plants and animals releases thermal energy.

Earth --> Thermal energy comes from deep inside and it is called geothermal energy.

You have to prepare a pH 5.00 buffer, and you have the following 0.10 M solutions available: HCOOH (pka=3.74), HCOONa, CH3COOH (pka=4.74), CH3COONa, HCN (pka=9.31), and NaCN. Which solutions would you use?

Answers

Answer:

CH3COOH - CH3COONa since its pKa is closest to the required pH.

Explanation:

Hello there!

In this case, in agreement with the theory of buffers as solutions able to withstand severe pH changes due to the addition of acidic or basic substances, it is possible to set up a generation equilibrium expression for the acids herein given:

[tex]Ka=\frac{[A^-][H_3O^+]}{[HA]}[/tex]

Which leads to the Henderson-Hasselbach equation:

[tex]pH=pKa+log(\frac{[A^-]}{[HA]} )[/tex]

Thus, since all the buffers have [A-]=[HA]=0.10M, the log part becomes 0 and therefore the best buffer will have the closest pKa to the required pH, which is CH3COOH - CH3COONa since its pKa is 4.74.

Best regards!

[tex]CH_3COOH\; and\; CH_3COONa[/tex] can be used to prepare a pH buffer, if 0.10 M solution available of the solutions.

What is buffer?

Buffer is a solution, that resist change in pH, by adding or removing H+ ions to the solution.

Maintaining a constant pH is necessary to complete many reactions.

In blood, bicarbonates maintain the pH of the body.

[tex]CH_3COOH\; and\; CH_3COONa[/tex] have approx the nearest pH, so they can be used to make a buffer.

Thus, the correct options are [tex]CH_3COOH\; and\; CH_3COONa[/tex]

Learn more about buffer

https://brainly.com/question/24188850

Which describes bonding electrons in a polar covalent bond?


electrons that are not shared equally

electrons that are shared in diatomic molecules

electrons that are shared equally

Answers

Answer:

I think the third one

Explanation:

i think

Answer:

electrons that are NOT shared equally

Explanation:

Which statement defines enzymatic activity? Enzymes are required to slow down biological reactions within cells. Specific enzymes can catalyze a wide variety of chemical reactions. Enzymes regulate cellular functions through feedback mechanisms. Enzymes bind substrates so that reactive groups have many different orientations.

Answers

Answer:

Enzymes are required to slow down biological reactions within cells,

this could be not sure

Answer:

D

Explanation:

Enzymes bind substrates so that reactive groups have many different orientations.

A student prepared a stock solution by dissolving 20.0 g of NaOH in enough water to make 150. mL of solution. She then took 15.0 mL of the stock solution and diluted it with enough water to make 65.0 mL of a final solution. What is the concentration of NaOH for the final solution

Answers

Answer:

[tex]0.769\ \text{M}[/tex]

Explanation:

Mass of stock solution = 20 g

Molar mass of NaOH = 40 g/mol

Volume of stock solution = 0.150 mL

[tex]M_2[/tex] = Concentration of NaOH for the final solution

[tex]V_1[/tex] = Amount of stock solution taken = 15 mL

[tex]V_2[/tex] = Total volume of solution = 65 mL

Molarity is given by

[tex]M_1=\dfrac{\text{Mass}}{\text{Molar mass}\times \text{Volume}}\\\Rightarrow M_1=\dfrac{20}{40\times 0.15}\\\Rightarrow M_1=\dfrac{10}{3}[/tex]

We have the relation

[tex]M_1V_1=M_2V_2\\\Rightarrow M_2=\dfrac{M_1V_1}{V_2}\\\Rightarrow M_2=\dfrac{\dfrac{10}{3}\times 15}{65}\\\Rightarrow M_2=0.769\ \text{M}[/tex]

The concentration of NaOH for the final solution is [tex]0.769\ \text{M}[/tex].

Potassium iodide, KI, is used as an expectorant. How many grams are in 0.300 mole of potassium iodide?

Answers

Answer: 49.8 g

Explanation: molar mass M(KI) = 39.1+ 126.9 = 166 g/mol

Mass m= n·M= 0.3 mol· 166 g/mol

Help me! Who ever gets to answer and has the best answer gets brainliest

Answers

Answer:

Decay-the breakdown of dead plants..

Earth- thermal energy comes from deep inside...

Fires- these consume feul...

Explanation:

Answer:

Fires - These consume fuel and covert chemical energy stored in that fuel into thermal, light and sound energy

Decay - The breakdown of dead plants and animals produces thermal energy

Earth - Thermal energy comes from deep inside and is called geothermal energy

Explanation:

Fires, when you burn wood, you convert chemical energy from the wood into thermal (warmth from the fire), light (glow from the fire), sound (crackling sound of wood burning)

Decay - I can't explain that one to you but there are power plants that use decomposition to produce energy

Earth - Beneath the crust there is the mantle, which consists of molten rock which produces a lot of thermal energy. This can be seen in geysers, where the molten rock heats water and hot water can burst out of the surface. Applies to hot springs too

.) Neon and HF have approximately the same molecular masses. a.)Explain why the boiling points of Neon and HF differ b.)Compare the change in the boiling points of Ne, Ar, Kr, and Xe with the change of the boiling points of HF, HCl, HBr, and HI, and explain the difference between the changes with the increasing atomic or molecular mass.

Answers

Answer:

See explanation

Explanation:

a) The magnitude of intermolecular forces in compounds affects the boiling points of the compound. Neon has London dispersion forces as the only intermolecular forces operating in the substance while HF has dipole dipole interaction and strong hydrogen bonds operating in the molecule hence HF exhibits a much higher boiling point than Ne though they have similar molecular masses.

b) The boiling points of the halogen halides are much higher than that of the noble gases because the halogen halides have much higher molecular masses and stronger intermolecular forces between molecules compared to the noble gases.

Also, the change in boiling point of the hydrogen halides is much more marked(decreases rapidly)  due to decrease in the magnitude of hydrogen bonding from HF to HI. The boiling point of the noble gases increases rapidly down the group as the molecular mass of the gases increases.

What is the hydronium ion concentration of a solution whose pH is 4.12?
a. 5.1 x 10–6 M
b. 7.6 x 10–5 M
c. 6.4 x 10–5 M
d. 4.4 x 10–8 M

Answers

A is may be the correct answer

6. Menthol is a member of the terpene family of natural products. It exists in a (1R, 2S, 5R) form and a (IS, 2R, 5S) form. Are these two compounds enantiomers or diastereomers?
​​

Answers

Here ya go if you need the link we’re I found this answer key https://studylib.net/doc/8708211/exam-2---chemistry

The gases are contained in a reaction vessel and are in equilibrium at 298 K

X2Zi â 2XZ2(g)


a. Activation energy
b. Total mass of the system
c. Molar concentration of XZ4(g)
d. Number of molecules present
e. Equilibrium constant

1. Is decreased by the addition of a catalyst?
2. Is decreased when the volume of the reaction vessel is increased and equilibrium is reestablished at 298 K?

Answers

Answer:

1) Activation energy  ( A )

2) Molar concentration of X[tex]_{2}[/tex]Z[tex]_{4}[/tex](g) ( C )

Explanation:

X[tex]_{2}[/tex]Z[tex]_{4}[/tex](g) ⇄ 2XZ

1) Activation energy Is decreased by the addition of a catalyst

while Equilibrium constant will Increase and other options will still remain unaffected

2)Molar concentration of X[tex]_{2}[/tex]Z[tex]_{4}[/tex](g) Is deceased when the volume of the reaction vessel is increased and equilibrium is reestablished at 298 K

while Number of molecules present will Increase

how many grams of silver chloride are produced from 15.0 g of silver nitrate​

Answers

Answer:

4.2 g

Explanation:

what is an optical property​

Answers

Answer:

The optical properties of a material define how it interacts with light. The optical properties of matter are studied in optical physics, a subfield of optics. Wiki.pedia

Explanation:

What is mass times acceleration equal to?

Answers

Answer:

Mass (kg) × Acceleration (m/s²) = Force (N)

Newton's second law of motion is F = ma, or force is equal to mass times acceleration.

Chlorofluorocarbons may be harming the ozone layer by ____.
a.
adding more ozone molecules
c.
destroying ozone molecules
b.
blocking ultraviolet radiation
d.
adding carbon dioxide molecules


Please select the best answer from the choices provided

Answers

Answer:

The awnser is C. Hope that helps!!!

what is one property of skim milk indicating that it is a colloidal dispersion?​

Answers

Answer:

it's dairy

Explanation

Reactants for a certain reaction are combined in a solution. Which solution
would have the most successful collisions and so enable the reaction to
proceed quickly?
A. A solution at low concentration and low temperature
B. A solution at high concentration and low temperature
O C. A solution at high concentration and high temperature
D. A solution at low concentration and high temperature

Answers

The correct answer is solution B!

.....plllzzz heeelp me fast?? ​

Answers

Answer:

Explanation:

It is 11

It’s 11 dndndnenddnnenrfjdnnrfnnd

If a compressed air cylinder for scuba diving contains 6.0 L of gas at 18°C and 200 atm pressure, what volume does the gas occupy at 1.0 atm and 25°C?​

Answers

Answer:

[tex]V_2=1228.9L[/tex]

Explanation:

Hello there!

In this case, given the pressure, temperature and volume of the gas, we notice that we need the combined ideal gas as shown below:

[tex]\frac{P_2V_2}{T_2} =\frac{P_1V_1}{T_1}[/tex]

Thus, solving for the final volume, V2,  we would obtain:

[tex]V_2=\frac{P_1V_1T_2}{T_1P_2}[/tex]

Now, we plug in the data and make sure the temperature must be in Kelvins to obtain:

[tex]V_2=\frac{200atm*6.0L*(25+273)K}{(18+273.15)K(1.0atm)}\\\\V_2=1228.9L[/tex]

Best regards!

Calculate the pH of a 0.10 M NH4Cl solution.

Answers

Answer:

Answer: pH = 2.72

Explanation:

Calculate the pH of 0.010 M HNO2 solution. The K, for HNO2 is 4.6 x 104 

A student is heating a crystal of alum to
determine the hydrate formula. If she removes
it from the heat before all the water has been
removed, what will happen to the calculated
hydrate formula?
A. It will not be affected by the error.
B. The mole ratio will indicate less water than was
actually present.
C. The mole ratio Will indicate less alum than was
actually present.

Answers

I think It’s probably a
Other Questions
what is is the intermediary between assembly language and the hardware components of the von neumann machine Which sets of structures are homologous? Which type of sensor can be used to check the obstacles in front of the autonomous vehicles? II. ALWAYS, SOMETIMES, OR NEVER TRUE. WriteASN1232.3.4.5.6.7.8.9.10.-If the statement is ALWAYS true-If the statement is SOMETIMES true-If the statement is NEVER trueA diameter of a circle is a chord.The sum of any two sides of a triangle is greater than the third side.The sum of the squares of the legs of a right triangle is equal to the square of itshypotenuse.The geometric mean of two numbers is the average of their product.A minor arc of a circle is greater than 180.To find the length of an arc, divide the measure of the central angle then multiply it by thearea of the circle.Dilation can either shrink or enlarge a figure.A line can be bisected.Supplementary angles are congruent.If two pairs of corresponding angles of two triangles are congruent, then the triangles aresimilar.III. Problem-solving: How do you find the slope of 4x 5y 0? Competition in the Craft Beer Industry in 2020* Overview Locally produced or regional craft beers caused a seismic shift in the U.S. beer industry during the early 2010s with the gains of the small, regional newcomers coming at the expense of such well-known brands as Budweiser, Miller, Coors, and Bud Light. Craft breweries, which by definition sold fewer than 6 million barrels (bbls) per year, expanded rapidly with the deregulation of intrastate alcohol distribution and retail laws and a change in consumer preferences toward unique and high-quality beers. The growing popularity of craft beers led to an approximate four percent annualized rate of growth in industry revenue between 2015 and 2020. Despite the continued growth in craft beer popularity, the overall beer industry remained flat in 2019 with total beer sales dropping by almost two percent in the United States. The craft beer industry, too, had begun to show signs of a slowdown going into 2020. Annual growth for the next five years was projected to be a little over two percent; approximately half of what it had been for the past five years. Part of the slowdown was due to shifting consumer trends away from beer and towards lower calorie alternatives, such as hard seltzers, or even abstaining from alcohol completely. Still, there did not seem to be a slowdown in the number of new craft brewers entering the market. In addition, consolidation continued. Led most notably by AB InBevs acquisition of several craft breweries, Grupo Modelo, and its acquisition of SABMillermacrobrewers were continuing to battle for the craft beer market share. Established craft brewers responded in kind, as Boston Beer Company Inc. acquired Dogfish Head Brewery. Yet, the most pressing threat to craft brewers may not have been competition, but the coronavirus (COVID-19). Beginning in early 2020, COVID-19 spread across the world, leading governments to restrict travel and to order citizens to remain at home to try to contain the spread of the virus. Within the United States, shutdowns had led to over 40 states experiencing record-setting unemployment rates.4 For the small, local craft brewers who relied on local bars, tasting events, and other intimate settings to drive awareness and revenue, COVID-19 and social distancing could be the biggest threat in 2020. In our experience, it is quite difficult to have an insightful and constructive class discussion of an assigned case unless students have conscientiously made use of pertinent core concepts and analytical tools in preparing substantive answers to a set of well-conceived study questions before they come to class. In our classes, we expect students to bring their notes to the study questions to use/refer to in responding to the questions that we pose. Moreover, students often find that a set of study questions is useful in helping them prepare oral team presentations and written case assignmentsin addition to whatever directive question(s) you supply for these assignments. Hence, we urge that you provide students with assignment questionseither those we have provided or a set of your own questionsfor all those aspects of a case that you believe are worthy of student analysis or that you plan to cover during your class discussion of the case.What are the strategically relevant components of the U.S. and global craft beer industry macro-environment?What is competition like in the craft beer industry? Which of the five competitive forces is strongest? Which is weakest? What competitive forces seem to have the greatest effect on industry attractiveness and the potential profitability of new entrants?What does your strategic group map of the craft beer industry look like? Which strategic groups do you think are in the best positions? The worst positions? What key factors may determine the success of a start-up or smaller, craft brewery?What recommendations would you make to a smaller, craft brewery to improve its competitiveness in the market while mitigating any current and future risks?Identify the strategic issues facing craft brewers in 2020. What effects may these issues have on the industry? Efficiency versus equityThe economy consists of two consumers, Jamal and Mitch. They have ordered a pizza and are deciding how to divide it between themselves. They have brainstormed a few solutions, and now they want to consult an economist to determine if their solutions are efficient and fair. Assume that a pizza consists of eight slices, and the more pizza Jamal and Mitch eat, the happier they are. One of their solutions is to divide the pizza in half, so each of them would get four of the eight slices. An economist would say this solution is O efficient but not fair O fair but not efficient O efficient and fair O neither efficient nor fair Sand dunes do not move. true or false which of the following factors is associated with the development of disordered eating or eating disorders? a. history of post-traumatic stress disorder b. negative self body image c. unrealistic expectations to be perfect d. all of these are correct. Why was the sugar industry so important? What are 3 ways you can determine if a compound is ionic or covalent? hw10.3. csr vs dense format consider a matrix of integers. there are nonzero entries, where and the rest of the entries are all 's. this matrix can be stored in two formats 1) dense representation: each entry uses bytes of storage. 2) csr format: each column index, data value and row start pointer uses bytes of storage. what is the largest value of (i.e. the largest number of nonzeros) for which storing in csr format is more memory efficient? largest n Graph using table of values, f (x) = 2x^2 + 4x - 5 What are the 4 most common types of credit? A motorbike is travelling at 3m/s, and accerlates over 3.5s to reach a speed of 10m/s What was the acceleration of the bike Mrs. Zollicoffers bank pays 5 1/4% interest. She has $1,000 in the bank. How much interest would she receive in one year? After the experience of vietnam, many americans strongly opposed american military intervention abroad. This is often referred to as. what is the solution of 10(w+3)=70 What are A,B,A,B rhyme schemes and why f so why do poets/writers use them ? Choose the response that correctly describes a guaranteed payment.A loan payment from the partnership to pay back a loan from a partner.A loan payment from the partner to pay back a loan from a partnership.A payment made to a partner from the profits of the partnership.A payment made to a partner without regard to the income of the partnership.