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3 years ago

How do you make water?

Chemistry

2 answers:

IRINA_888 [86]3 years ago

6 0

Answer:

A water molecule (formally known as dihydrogen monoxide) is composed of two hydrogen atoms and one oxygen atom.

Explanation:

The actual reaction to make water is 2H2 + O2 = 2H2O + Energy

zhenek [66]3 years ago

4 0

Answer:

newtons law u cant destoy or make anything

Explanation:

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A student determines that a 1.5 g mixture of CaCO3(s) and

zysi [14]

We are given:

Mass of the mixture = 1.5 grams

Number of Moles of NaHCO₃ = 0.01 mole

Mass of 0.01 moles of NaHCO₃:

Mass = number of moles * Molar mass

Mass = 0.01 * 84

Mass = 0.84 grams

Mass% of Na in NaHCO₃:

Molar mass of NaHCO₃ = 84 grams/mol

Molar mass of Na = 23 grams / mol

Mass% = (Molar mass of Na / Molar mass of NaHCO₃) * 100

Mass% = (23/84) * 100

Mass% = 27%

Mass of Na in 0.01 moles:

Since the Mass% of Na is 27% and the total mass is 0.84 grams

So, we can say that 27% of 0.84 is the mass of Na

Mass of Na = 0.84 * 0.27

Mass of Na = 0.23 grams

Mass% of Na in the mixture:

Total mass of the mixture = 1.5 grams

Mass of Na in the mixture = 0.23 grams

Mass% of of Na in the Mixture = (Mass of Na / Mass of Mixture) * 100

Mass% of Na = (0.23 / 1.5) * 100

Mass% of Na = 15.3%

Therefore, we have 15.3% Na in the given mixture by mass

7 0

3 years ago

What balances charges that may build up as reduction and oxidation occur in a voltaic cell?

anygoal [31]

I think the correct answer from the choices listed above is option A. It is the salt bridge that balances charges that may build up as reduction and oxidation occur in a voltaic cell. The salt bridge is to maintain charge balance because the electrons are moving from one half cell to the other.

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3 years ago

Read 2 more answers

How can you form new neural pathways that will lead to transformed thinking and a transformed life?

aleksandr82 [10.1K]

When you understand how neural pathways are created in the brain, you ... But because I had the will to do it, I built a new pathway, and I rewired or reprogrammed my brain. ... can learn new behaviors and attitudes and can transform their lives. ... to the habit, and see what results you're creating in your life

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4 years ago

How many moles of gas are contained in a 50.0 L cylinder at a pressure of 100.0 atm and a temperature of 35.0°C?

grigory [225]

Answer:

n = 2 moles (1 sig-fig)

Explanation:

Using the Ideal Gas Law equation (PV = nRT), solve for n (= moles) and substitute data for ...

pressure = P(atm) = 100atm

volume =V(liters) = 50L

gas constant = R = 0.08206L·atm/mol·K

temperature = T(Kelvin) = °C + 273 = (35 + 273)K = 308K

PV = nRT => n = PV/RT = (100atm)(50L)/(0.08206L·atm/mol·K)(308K)

∴ n(moles) = 1.978moles ≅ 2 moles gas (1 sig-fig) per volume data (= 50L) that has only 1 sig-fig. (Rule => for multiplication & division computations round final answer to the measured data having the least number of sig-figs).

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3 years ago

a 10g cookie is burned in a calorimeter causing the temperature of 20 g water to change from 3°C to 5°C, What us the energy cont

Morgarella [4.7K]

Answer:

30 g. 8'C

Explanation:

the 10 g is plus the fact that I have to help you get the chance to get the answer

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3 years ago