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3 years ago

What are some examples of BASES around you?

Chemistry

1 answer:

LenaWriter [7]3 years ago

5 0

Couple that are common are ammonia, soap (any kind), and baking soda.

You might be interested in

Which statement about the periodic table is true?

dedylja [7]

Answer

Two different elements have similar chemical properties when they have the same number of valence electrons in their outermost energy level. ... Elements in the same column of the Periodic Table have the same number of valence electrons – that's why they have similar chemical properties.

8 0

3 years ago

What is the empirical formula of the compound? Zn As O

GaryK [48]

Answer:

Zn3(AsO4)2 or As2O8Zn3.

Explanation:

6 0

4 years ago

200 L of a gas at 10 atm pressure and 400 K is cooled to 100 K and reduced to 2 atm pressure. What is the new volume?

Brut [27]

Answer:

250L

Explanation:

Data;

V1 = 200L

P1 = 10atm

T1 = 400K

T2 = 100K

P2 = 2atm

V2 = ?

To solve this question, we'll have to use the combined gas equation which is a combination of Boyle's law, Charles law and pressure law.

From combined gas equation,

(P1 × V1) / T1 = (P2 × V2) / T2

P1 × V1 × T2 = P2 × V2 × T1

Solve for V2,

V2 = (P1 × V1 × T2) / P2 × T1

V2 = (10 × 200 × 100) / (2 × 400)

V2 = 200,000 / 800

V2 = 250L

The final volume of the gas is 250L

5 0

3 years ago

You are burning wood to heat water for your industrial process. What is the mass of wood required to raise the temperature of 10

natta225 [31]

Answer:

18,8kg of wood

Explanation:

The energy you need to to raise the temperature of 1000 kg of water from 25.0 to 100.0 °C is:

q = C×m×ΔT

Where: q is heat, C is specific heat of water (4,184J/g°C), m is mass in grams (1000x10³g), and ΔT is 100,0°C - 25,0°C = 75,0°C

Replacing:

q = 4,184J/g°C×1000x10³g×75,0°C

<u><em>q = 3,14x10⁸ J of heat are required</em></u>

Now, if the heating value of dry wood is 16,72 MJ/kg = 16,72x10⁶ J/kg, mass of wood required is:

3,14x10⁸J × (1kg / 16,72x10⁶ J) = <em>18,8 kg of wood are required</em>

I hope it helps!

5 0

3 years ago

g Consider the following system at equilibrium where H° = -87.9 kJ, and Kc = 83.3 , at 500 K: PCl3 (g) + Cl2 (g) PCl5 (g) If the

Ksivusya [100]

Answer:

C. Remains the same

A. Is greater than Kc

B. Run in the reverse direction to restablish equilibrium.

C. Remain the same

Explanation:

As the reaction is exothermic (ΔH < 0), when occurs, produce heat.

Based on Le Chatelier's principle, if the temperature decreases, <em>the system will produce more product trying to restore the equilibrium</em>

* The value of Kc doesn't change because is the constant of the reaction, Kc. That is,

<h3>C. Remains the same</h3>

* Qc is the ratio between products and reactants. As more product is produced, Qc will increase becomes:

<h3>A. Is greater than Kc</h3>

*After the formation of product, the system must:

<h3>B. Run in the reverse direction to restablish equilibrium. </h3>

Because product is produced

*Cl₂ as reactant is consumed producing more product, decreasing its concentration. But when the equilibrium is restored, its concentration would be the same

<h3>C. Remain the same</h3>

3 0

3 years ago