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3 years ago

Describe a situation where scientific knowledge was gained through doing an experiment

2 answers:

8 0

<span>Scientific knowledge can be gained through experiment by doing a thorough experimental procedure that will enable to answer the objectives of the experiment that will lead to a scientific knowledge. Through experimentation you can know the behavior of a variable with respect to a certain variable. This can also answer some knowledge gap about certain topic</span>

ser-zykov [4K]3 years ago

8 0

Answer:

When determining the types of chemical reactions.

Explanation:

Hello,

In this case, in order to establish the different types of chemical reactions, several experiments are carried out the determine whether a chemical reaction is synthesis, decomposition, double displacement, double displacement or combustion. Such experiments consist on the combination of different of reactants under varied conditions in order the appreciate the reaction behavior over the time, changes in color, temperature changes and formed products that suggest the type of reaction.

Once the observations are set throughout the experiments, one provides the scientific knowledge that in this case will help to differentiate such types of chemical reactions.

Best regards.

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Cerrena [4.2K]

Answer:

Your answer will be 118 cm^3.

Explanation:

V1/T1 = V2/T2, so V2 = V1T2/T1. 60C = 333K and 120C = 393K.

V2 = (100cm3)(393K)/(333K) = 118 cm3

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3 years ago

In the laboratory you dissolve 12.3 g of chromium(ii) sulfate in a volumetric flask and add water to a total volume of 375. ml.

valentinak56 [21]

Hope it cleared your doubt.

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3 years ago

Concentrated hydrochloric acid<br> dilute sulfuric acid chemical equation?

ankoles [38]

H2SO4 (1) H20 (g) + SO3 (g)

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3 years ago

Analysis of the water content of a lake found in the desert showed that it contained 16.6 percent chloride ion, and had a densit

IRISSAK [1]

Answer : The molarity of the chloride ion in the water is, 5.75 M

Explanation :

As we are given that 16.6 % chloride ion that means 16.6 grams of chloride ion present 100 grams of solution.

First we have to calculate the volume of solution.

$\text{Volume of solution}=\frac{\text{Mass of solution}}{\text{Density of solution}}$

$\text{Volume of solution}=\frac{100g}{1.23g/mL}=81.3mL$

Now we have to calculate the molarity of chloride ion.

Molarity : It is defined as the number of moles of solute present in one liter of volume of solution.

Formula used :

$\text{Molarity}=\frac{\text{Mass of chloride ion}\times 1000}{\text{Molar mass of chloride ion}\times \text{Volume of solution (in mL)}}$

Now put all the given values in this formula, we get:

$\text{Molarity}=\frac{16.6g\times 1000}{35.5g/mole\times 81.3mL}=5.75mole/L=5.75M$

Thus, the molarity of the chloride ion in the water is, 5.75 M

8 0

3 years ago

A board has a mass of 750 g. If you ground the whole board down to sawdust, what would be the mass of the pile of sawdust?

mash [69]

The law of conservation of mass states that mass can neither be created nor destroyed. For example in an isolated system, mass of the reactants is equal to the mass of the products. Thus, mass or the quantity of the system under consideration will remain unchanged through any physical or chemical process.

In the given example, the board initially has a mass of 750 g. It is physical transformed to sawdust by grinding. Based on the conservation of mass, the pile of sawdust would still weigh 750 g.

4 0

3 years ago