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Pie
3 years ago
13

What two measurements are needed to calculate speed?

Chemistry
2 answers:
Alchen [17]3 years ago
5 0

Answer:

Two essential measurements to calculating average speed are Distance and Time

Explanation:

hope it helps you

Andru [333]3 years ago
5 0

v = d/t

d = distance

t = time

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Which chemical equation correctly represents the formation of water and carbon dioxide from the decomposition of carbonic acid i
defon

Carbonic acid's chemical formula is H2CO3.  Its decomposition to water (H2O) and carbon dioxide (CO2) is represented by the equation:


H2CO3(g) → H2O(l) + CO2(g)

6 0
4 years ago
Read 2 more answers
In the process of oxidizing i− to i2, so42− is reduced to so2. how many moles of so2 are produced in the formation of one mole o
mafiozo [28]
The balance chemical equation is follow,

                    2 I⁻  + SO₄²⁻  +  4 H⁺    →    I₂  +  SO₂  +  2 H₂O

According to this reaction, 2 moles of I⁻ reacts with 1 mole of SO₄²⁻ to produce 1 mole of I₂ and 1 mole of SO₂.

Result:
          So with the formation of 1 mole of I₂, 1 mole of SO₂ is produced.
5 0
4 years ago
Given the reaction: 2H₂ + O₂ → 2H₂O The total number of grams of O₂ needed to produce 54 grams of water is _________.
Vedmedyk [2.9K]

Answer : The mass of O_2 needed are, 48 grams.

Explanation :

First we have to calculate the moles of H_2O

\text{Moles of }H_2O=\frac{\text{Given mass }H_2O}{\text{Molar mass }H_2O}=\frac{54g}{18g/mol}=3mol

Now we have to calculate the moles of O_2

The given balanced chemical reaction is:

2H_2+O_2\rightarrow 2H_2O

From the reaction, we conclude that

As, 2 mole of H_2O produces from 1 mole of O_2

So, 3 mole of H_2O produces from \frac{3}{2}=1.5 mole of O_2

Now we have to calculate the mass of O_2

\text{ Mass of }O_2=\text{ Moles of }O_2\times \text{ Molar mass of }O_2

Molar mass of O_2 = 32 g/mole

\text{ Mass of }O_2=(1.5moles)\times (32g/mole)=48g

Therefore, the mass of O_2 needed are, 48 grams.

4 0
3 years ago
Observe: Set up the Gizmo to observe freezing. What do you notice about the temperature while the water is in the process of fre
kaheart [24]

Answer:

In cases where the water freezes, a release of energy occurs to the environment, therefore energy is lost, and it begins to "cool down".

The term cooling in chemical science today is not well seen since it is not considered that this exists, but would be replaced by the term "absence or loss of heat".

It is considered that a body cools when its temperature decreases, and if it continues to decrease as in the case of water, a point will reach the freezing point, which in this case that of water is 0 degrees Celsius, therefore when the cooling overcomes this thermal barrier the water solidifies "freezing"

Explanation:

In the case of pure water (H2O), the freezing point is 0 ° C. This means that, as long as it is at a temperature above 0ºC and below 100ºC (since that is its boiling point), the water will be in a liquid state.

8 0
3 years ago
What is the approximate wavelength of visible light?
hammer [34]

Answer:

its answer A....that's the answer is

7 \times 10 ^ - 7

Explanation:

The visible light spectrum is the section of the electromagnetic radiation spectrum that is visible to the human eye. Essentially, that equates to the colors the human eye can see. It ranges in wavelength from approximately 400 nanometers (4 x 10 -7 m, which is violet) to 700 nm (7 x 10-7 m, which is red).

7 0
3 years ago
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