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3 years ago

Which activity will NOT cause an increase in reaction rate?

Chemistry

1 answer:

Ratling [72]3 years ago

5 0

Answer:

Inhibitor

Explanation:

Inhibitors generally slow down a reaction rate and prevent the particles from reacting with each other.

It's not the others because:

Catalysts work by lowering the activation energy, which in turn increases the reaction rate as more particles have enough energy to react.

Surface area allows for particles in the reaction to collide more often with each other, which increases the reaction rate.

Temperature increases the speed of particles in the reaction, causing particles to collide more often with each other and therefore increasing the reaction rate.

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1. A dining hall had a total of 25 tables-some long rectangular tables and some round

TEA [102]

x = 20 long tables

y = 5 round table

Explanation:

We have the following system of equations:

x + y = 25

8x + 6y = 190

From the first equation we have:

x = 25 - y

And we replace x in the second equation:

8(25 - y) + 6y = 190

200 - 8y + 6y = 190

200 - 2y = 190

200 - 190 = 2y

10 = 2y

y = 5

Now we insert the value of y in the next equation:

x = 25 - y

x = 25 - 5

x = 20

Learn more about:

system of equations

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#learnwithBrainly

7 0

3 years ago

What is work and why energy is useful for work???<br>(please guys give answer)

dexar [7]

Work is labor and energy is useful for it because you need energy to work unless you will be tired

3 0

3 years ago

A sample of silver has a mass of 21 grams

ad-work [718]

Answer:

$density \: of \: the \: silver = \frac{mass}{volume} = \frac{21}{2} \\ = 10.5 \: gram {(cm)}^{ - 3}$

<h2>10.5 gram(cm)^-3 is the right answer.</h2>

8 0

3 years ago

Read 2 more answers

Use de Broglie's hypothesis to determine the speed of the electron in a hydrogen atom when in the n = 5 orbit, whose radius is 1

andriy [413]

Answer:

Velocity = 4.41×10⁵ m/s

Explanation:

The force of attraction between the nucleus and the electron is equal to the centrifugal force acting on the outermost electron due to circular rotation. It can be mathematically written as:

$\frac {K\times q^2}{r^2}=\frac {m\times v^2}{r}$

Where,

K is the Coulomb's constant having value 9×10⁹ N. m²/C²

q is the charge on the electron or the proton which is 1.6×10⁻¹⁹ C

r is the radius of the atom

m is the mass of the electron having value 9.1×10⁻³¹ Kg

v is the velocity of the electron.

The equation can be written to calculate the velocity as:

$v=\sqrt {\frac {K\times q^2}{m\times r}}$

Given that:

r = 1.3×10⁻⁹ m

So,

$v=\sqrt {\frac {9\times 10^9\times (1.6\times 10^{-19})^2}{9.1\times 10^{-31}\times 1.3\times 10^{-9}}}$

<u>Velocity = 4.41×10⁵ m/s</u>

4 0

3 years ago

50 + 25 pts + brainliest other brainly answers are incorrect color luster and taste are correct but i need 1 or 2 more Some phys

r-ruslan [8.4K]

Answers and Explanations:

Physical properties are characteristics of substances that can be seen without a change in its chemical composition.

Here, physical properties are:

- density

- color

- luster

- taste

- abundance

- source

I'm not completely sure what you mean by "source", but I'm going to assume you mean the substance's origin found in nature.

4 0

3 years ago