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3 years ago

What does the addition of a catalyst do to a reaction?

Chemistry

1 answer:

andreev551 [17]3 years ago

8 0

Answer:

Explanation:

It lowers the activation energy required therefore speeding up the reaction

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sesenic [268]

Nice written.

Is it written by you yourself or you have copied it from somewhere?

7 0

4 years ago

An industrial-strength pipe cleaner has a molarity (M) ) of 7.0 a 0.60 liter container. To be safely used on the pipes in a home

Vsevolod [243]

Answer:

1.68L

Explanation:

Step 1:

Data obtained from the question. This includes the following:

Initial Molarity (Mi) = 7M

Initial volume (Vi) 0.6L

Final Molarity (Mf) = 2.5M

Final Volume (Vf) =.?

Step 2:

Determination of the final volume of the solution.

This can be achieved as shown below:

MiVi = MfVf

Divide both side by Mf

Vf = MiVi /Mf

Vf = 7 x 0.6 / 2.5

Vf = 1.68L

Therefore, the new volume of the solution is 1.68L

6 0

3 years ago

Shawna is trying to figure out the best weight to increase her muscular strength. She has chosen a weight and can lift it two ti

PolarNik [594]

Answer:

Explanation:

cause she is not supposed to be overweight while exercising.

7 0

4 years ago

Read 2 more answers

Given the molar absorptivity for a species X of 1600 M-1cm-1 at a wavelength of 270 nm, and 400 M-1cm-1 at a wavelength of 540 n

Andre45 [30]

Answer:

Explanation:

From the given information:

At wavelength = 270 nm

$\varepsilon x_1 = 1600 \ m^{-1} \ cm^{-1} \\ \\ \varepsilon y_1 = 200 \ m^{-1} \ cm^{-1}$

At 270 nm

Suppose x is said to be the solution for the concentration of x and y to be the solution for the concentration of y;

Then:

$\varepsilon x_1 \ l + \varepsilon y_1 \ l= 0.5 \\ \\ A = A_1 + A_2$

$1600 xl + 200 yl= 0.5$

Divide both sides by 200

$8xl + yl = \dfrac{0.5}{200}$

$8x + y = \dfrac{0.5}{200}l$

Use l = 1cm (i.e the standard length)

Then;

$8x + y = \dfrac{0.5}{200} ---- (1)$

$\varepsilon x_2 x \ l + \varepsilon y_2 y \ l= 0.5 \\ \\ 40 xl + 800 yl = 0.5$

$x + 20 y = \dfrac{0.5}{400 \ l}$

since l = 1

$x + 20 y = \dfrac{0.5}{400 \ } --- (2)$

Equating both (1) and (2) together, we have:

$8x + y - 8x - 160 y = \dfrac{0.5}{200} - \dfrac{0.5 \times 8}{400} \\ \\ \implies - 159 y = \dfrac{0.5}{200} ( 1 - \dfrac{8}{2}) \\ \\ -159 y = \dfrac{-0.5 \times 3}{200} \\ \\ 159 \ y = 0.0075 \\ \\ y = \dfrac{0.0075}{159} \\ \\ y = 0.00004716 \\ \\ y = 4.7 \times 10^{-5 } \ M$

3 0

3 years ago

Give the names and symbols of three<br> elements that are gases at room temperature.

umka21 [38]

Helium gas: He

Hydrogen gas: H₂

Oxygen gas: O₂

Explanation:

Gases can exist at room temperature in monoatomic form or sometimes as polyatomic molecules.

A wide range of elements exists as gases at room temperature. Most of their molecules have covalent bonds between their atoms which ensures that they are stable.

Other examples are:

Argon gas Ar
Neon gas Ne
Bromine gas Br₂
Nitrogen gas N₂

Learn more:

Noble gas brainly.com/question/10874792

#learnwithBrainly

8 0

3 years ago