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2 years ago

Someone help me answer this please! I’ll mark you brainliest

Chemistry

1 answer:

kondor19780726 [428]2 years ago

8 0

b. increase in surface area

<h3>Further explanation</h3>

Given

Speeding up a chemical reaction

Required

Factors used to speed up reactions

Solution

There are several factors that influence reaction kinetics :

1. Concentration

2. Surface area

3. Temperature

4. Catalyst

5. Pressure

6. Stirring

Temperature is related to the kinetic energy of the particles. Heat is absorbed causes the particles of matter to move faster so that the reaction can take place faster

The enlarged surface area of the reactants causes more particles to react with other particles.

50 g square block of sulfur can be broken into small pieces or powdered so that more particles come into contact with each other

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When a warm soda can is placed in an ice chest full of ice, the soda can _______ heat and the ice _______ heat until they are bo

Svetach [21]

D because as the soda can starts to cool off the ice in turn begins to melt because the heat from the soda is being distributed on the ice and vice versa.

5 0

3 years ago

I know this isn't the subject of math, but nobody can answer it in math and I need help with the steps because I need to turn it

djyliett [7]

F(x)=-1/x
g(x)=√(3x-9)

Domain of (f/g)(x): ??

1We find out the domain of f(x):
f(x) is a rational function, therefore can take real values if the denominator is not ("0"), therefore the domain of f, will be all values excpet "0"
Domain of f: (-∞,0)U(0,+∞);

      o
----------------------------------------------O-------------------------------------------
←-------- -∞    +∞ ----------→

g(x) is a radical square root function, therefore the radicand have to be greater than o equal to "0"
3x-9≥0
3x≥9
x≥3

   3
.........................................................Ф--------------------------------
←--------- - ∞    +∞ -----------→

(f/g)(x) = (-1/x) / (√(3x-9)) is a rational function with a square root in the denominator,also the square root don´t take the value of "0";
Therefore:
3x-9>0
3x>9
x>3

The domain of the function (f/g)(x) only can take the values found in all three domains at once.
      3
............................................................0---------------------------------
←--------- -∞ +∞-------------→

Answer: (3,+∞)

7 0

3 years ago

Give the product of the reaction of excess benzene (2 equivalents) with dichloromethane and alcl3.

SOVA2 [1]

Hello!

The product of the reaction of excess benzene with dichloromethane is diphenylmethane.

The reaction that benzene undergoes with dichloromethane is a Friedel-Crafts Alkylation, in which firstly Benzene is alkylated to Benzyl Chloride, and after that, the Benzyl Chloride reacts with another equivalent of Benzene to form the compound Diphenylmethane. The Reaction Scheme is shown in the image below:

Have a nice day!

5 0

3 years ago

A family takes a summer vacation to Florida. They drive for 8 hours before stopping at a hotel for the night. They

andrezito [222]

Average speed of the trip = 52 km/hr

<h3>Further explanation </h3>

Distance is the length traveled by an object within a certain of time .

Average speed = total distance/total amount of time ,

Can be formulated :

$\tt S(speed)=\dfrac{D}{T}$

Total distance travelled : 1560 km

Total time : 8 hr + 12 hr + 10 hr = 30 hr

$\tt avg.speed=\dfrac{tot~D}{tot~T}\\\\avg.speed=\dfrac{1560}{30}\\\\avg.speed=52~km/hr$

7 0

3 years ago

a helium balloon has a volume of 2.95 liters at 25 c. the volume of the ballon decreased to 2.25 l after it is placed outside on

OleMash [197]

Answer:

The outside temperature is -45.8°C

Explanation:

When a gas keeps on constant its moles and its pressure, we can assume that volume will be increased or decreased as the T° (absolute T° in K).

V1 / T1 = V2 / T2

2.95L/298K = 2.25L / T2

(2.95L/298K ) . T2 = 2.25L

T2 = 2.25L . 298K / 2.95L

T2 = 227.2K

T°K - 273 = T°C

227.2K - 273 = -45.8°C

3 0

3 years ago