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4 years ago

¿Cuál de los siguientes no acelera a una reacción?

Chemistry

1 answer:

max2010maxim [7]4 years ago

7 0

Answer:

The correct answer is B).

Explanation:

The factors that accelerate a chemical reaction are:

- Temperature: at a higher temperature, the speed of a reaction is increased.

- Pressure: the higher this is, the greater the collisions between molecules and an acceleration of the reaction speed will occur.

-Catalysts: correspond to substances that accelerate chemical reactions, an example are enzymes. There are catalysts that increase the reaction rate and others that generate the opposite effect (they are inhibitors).

There are also other factors that accelerate a chemical reaction such as the concentration of reagents.

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K + Cl2 -> KCI <br> Balance equation

PtichkaEL [24]

Answer:

2K + Cl2 -> 2KCl

Explanation:

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3 years ago

Is garlic powder a pure substance

CaHeK987 [17]

Answer: most store-bought isnt

Explanation:

there typically a lot of addivitves

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3 years ago

3. An object weighs 8.22 lbs. What is the mass in grams?

Rainbow [258]

Answer:

The correct answer is 372852.9 g.

Explanation:

First, we must look for the relationship between the masses in grams and pounds.

To get an approximate result, the relationship between pounds and grams found is:

1 lbs = 453.592 g

Now we must use this relationship as a conversion factor in the following way:

8.22 lbs * $\frac{453.592 g}{1 lbs}$ = 372852.9 g

The mass expressed in grams for 8.22 lbs is 372852.9 g.

Have a nice day!

3 0

4 years ago

What are alkenes used to make?

evablogger [386]

Answer:

By far the most important use of alkenes is in the making of plastics as plastics are used in almost everything.

Explanation:

Alkenes themselves aren't used much in everyday life however Alkenes are very important to industrial synthesis as it is relatively easy to turn them into other things.

Alkenes can be turned into polymers or plastics through addition reactions and the most common ethene is turned into everything from plastic bags to bottles.

Alkenes can also be turned into alcohols. most commonly propene is used as a feedstock to produce butanol and other products useful in industry or for production

Explanation:

Can you be my friend in here

3 0

3 years ago

Read 2 more answers

A piece of sodium metal reacts completely with water as follows: 2Na(s) + 2H2O(l) ⟶ 2NaOH(aq) + H2(g) The hydrogen gas generated

Nastasia [14]

Answer:

$\large \boxed{\text{0.449 g}}$

Explanation:

1. Gather all the information in one place

M_r: 22.99

2Na + 2H₂O ⟶ 2NaOH + H₂

$\, p_{\text{tot}} = \quad \text{1.00 atm}\\p_{\text{H2O}} = \text{0.0313 atm}$

T = 25.0 °C

V = 246 mL

2. Moles of H₂

To find the moles of hydrogen, we can use the Ideal Gas Law:

pV = nRT

(a) Calculate the partial pressure of the hydrogen

$p_{\text{tot}} = p_{\text{H2}} + p_{\text{H2O}}\\\text{1.00 atm} =p_{\text{H2}} +\text{0.0313 atm}\\p_{\text{H2}} = \text{0.9687 atm}$

(b) Convert the volume to litres

V = 246 mL = 0.246 L

(c) Convert the temperature to kelvins

T = (25.0 + 273.15) K = 298.15 K

(d) Calculate the moles of hydrogen

$\begin{array}{rcl}\text{0.9687 atm}\times \text{0.246 L} & = & n \times 0.082 06 \text{ L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1} \times \text{298.15 K}\\0.2383 & = & 24.47n \text{ mol}^{-1}\\\\n & = & \dfrac{0.2383}{24.47\text{ mol}^{-1}}\\\\& = & 0.009740 \text{ mol}\\\end{array}$

3. Moles of Na

The molar ratio is 2 mol Na: 1 mol H₂

$\text{Moles of Na} =\text{0.009 740 mol H}_{2} \times \dfrac{\text{2 mol Na}}{\text{1 mol H}_{2}} = \text{0.019 48 mol Na}$

4. Mass of Na

$\text{Mass of Na} = \text{0.019 48 mol Na} \times \dfrac{\text{22.99 g Na}}{\text{1 mol Na}} = \text{0.449 g Na}\\\\\text{The mass of Na used was $\large \boxed{\textbf{0.449 g}}$}$

6 0

3 years ago