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aliina [53]
3 years ago
10

Can anyone please suggest me a good and easy project topic for physics and chemistry. For class nine or ten students.Please plea

se please help me.​
Chemistry
1 answer:
dolphi86 [110]3 years ago
8 0
Volcano , bleach and fabuloso , flour and soap
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Many scientists, including Joseph Priestly, hypothesized that fuels lost mass as they burned due to the loss of a substance call
DanielleElmas [232]
<h2>D this is a lot of hour to found but its ok thank you for sharing your question i hope this help</h2>

<h3>Carry on learning:)</h3>
6 0
3 years ago
Hydrogen is manufactured on an industrial scale by this sequence of reactions: CH2 (g) + H2O(g)=CO (g) + 3H2 (g) K1 CO (g) + H2O
Flauer [41]

Answer:

K = K1×K2 = [CO2] [H2]⁴ / [H₂O]² [CH4]

Explanation:

Based on the reactions:

CH2 (g) + H2O(g) ⇄ CO (g) + 3H2 (g) K1

CO (g) + H2O (g) ⇄ CO2 (g)+H2(g) K2

The sum of both reactions is:

CH4 (g)+2H2O (g) ⇄ CO2(g)+4H2(g) And K of the reaction is: K = K1×K2

K is defined as the ratio between concentrations of products and reactans. Each compound must be elevated to its coefficient in the reaction. That is:

<h3>K = K1×K2 = [CO2] [H2]⁴ / [H₂O]² [CH4]</h3>
4 0
4 years ago
I NEED HELP PLEASE, THANKS!
ira [324]

Answer:

About 0.652

Explanation:

Because the reaction is balanced, we can go straight to the next step. The molar mass of potassium is about 39.098, while the molar mass of hydrogen gas is 2 and the molar mass of water is 18. Therefore, 25.5g of potassium would be about 0.652 moles, and 220 grams of water would be about 12.222 moles, making potassium the limiting reactant. Since there is a single unit of each compound on both sides of the equation, there would be an equal amount of moles of potassium and hydrogen, and therefore about 0.652 moles of hydrogen gas would be produced. Hope this helps!

6 0
3 years ago
in a reaction 2.5g of sodium sulphate reacted with 4.5g of barium chloride. the products are 3.5g of barium sulphate and the res
klio [65]

The mass of sodium chloride : 3.5 g

<h3>Further explanation</h3>

Given

Reaction :

2.5g of sodium sulphate + 4.5g of barium chloride ⇒ 3.5g of barium sulphate + sodium chloride

Required

The mass of sodium chloride

Solution

Conservation of mass applies to a closed system, <em>where the masses before and after the reaction are the same</em>

From the reaction :

mass of reactants = 2.5 g + 4.5 g = 7.0 g

mass of products = 3.5 g + mass of sodium chloride

mass of reactants = mass of products

7.0 g = 3.5 g + mass of sodium chloride

mass of sodium chloride = 7 g - 3.5 g =3.5 g

3 0
3 years ago
What are the three main parts of the sun
REY [17]
The core,radiative zone<span> and </span>convective zone<span>.</span>
7 0
4 years ago
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