All categories

3 years ago

*

Chemistry

1 answer:

Gekata [30.6K]3 years ago

8 0

Answer:

2H₂ + O₂ → H₂O

Explanation:

The unbalanced equation is

2H₂ + O₂ → H₂O

In a balanced chemical equation, the number of moles of species on both sides of the expression must be the same.

2H₂ + O₂ → H₂O

Reactant Product

H O H O

Number of moles 4 2 2 1

We see that the number of hydrogen and oxygen on both sides of the expression differs significantly.

You might be interested in

Studies show that the average height of all Earth's oceans is increasing over

kirill [66]

Answer:

Explanation:

global warming causing the icebergs to melt which rises water

3 0

3 years ago

____ is involved in glucose metabolism.

krek1111 [17]

I took the test and the answer is chronium

7 0

3 years ago

According to one acid-base theory, a water molecule acts as an acid when the water molecule

Snowcat [4.5K]

According to one acid-base theory, a water molecule acts as an acid when the water molecule (3) donates an H+.

6 0

3 years ago

How many moles of Co2 are produced when 0.2 moles of sodium carbonate reacts with excess HCl

Pie

To determine the number of moles of carbon dioxide that is produced, we need to know the reaction of the process. For the reaction of HCl and sodium carbonate, the balanced chemical equation would be expressed as:

2HCl + Na2CO3 = 2NaCl + H2O + CO2

From the initial amount given of sodium carbonate and the relation of the substances from the balanced reaction, we calculate the moles of carbon dioxide as follows:

0.2 moles Na2Co3 ( 1 mol CO2 / 1 mol Na2Co3 ) = 0.2 moles CO2

Therefore, the amount in moles of carbon dioxide that is produced from 0.2 moles sodium carbonate would be 0.2 moles as well.

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

q = 3,14x10⁸ J of heat are required

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) = 18,8 kg of wood are required

I hope it helps!

5 0

3 years ago