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Ilya [14]
3 years ago
14

Part 2

Chemistry
1 answer:
sertanlavr [38]3 years ago
7 0

Answer:

hlo are u girl Or boy if girl text me not delete emy answer

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Why do scientists use the scientific method?
xeze [42]

Answer:

Scientists use the scientific method because it is evidence-based, standardized and objective in conducting experiments. The scientific method allows scientists to stick to facts and to avoid the influence of preconceived notions and personal biases in research processes, improving the credibility of research findings.

Explanation:

4 0
3 years ago
What type of change is the following: striking a match chemical, or physical?
chubhunter [2.5K]
Chemical,when you light a match stick, you are starting a chain reaction of the substance chemical formula, making it a chemical change
7 0
4 years ago
Explain how dalton’s atomic theory offered a convincing explanation of the observation that mass is conserved in chemical reacti
podryga [215]

Dalton's atomic theory was based on the law of conservation of mass which states that the matter can neither be created nor be destroyed but it can only transformed into one form or another. In a chemical reaction, total mass of the reactants will be equal to the total mass of the products.

Taking an example,

methane+oxygen\rightarrow \text{carbon dioxide}+water

CH_4+2O_2\rightarrow CO_2+2H_2O

Mass of CH_4 = 16g

Mass of 2O_2 = 2\times 32g

Total mass on reactant side = (16+2\times 32)

Total mass on reactant side = 80g

Mass of CO_2 = 44g

Mass of 2H_2O=2\times 18g

Total mass on product side = (44+2\times 18)

Total mass on product side = 80g

It is seen from the above example that the

total mass on reactant side = total mass on product side.


6 0
3 years ago
Chlorine is the most widely used disinfectant for killing pathogens during water treatment. Determine the kilograms of chlorine
makkiz [27]

Explanation:

The given data is as follows.

    Flow of chlorine (Q) = 10,000 m^{3}/day

Amount of liter present per day is as follows.

                  10,000 \times 10^{3} l/day

It is given that dosage of chlorine will be as follows.

                   10 mg/l = 10 \times 10^{-6} kg/l

Therefore, total chlorine requirement is as follows.

          Total chlorine requirement = (10,000 \times 10^{3}) \times (10 \times 10^{-6}) kg/day

                                        = 100 kg/day

Thus, we can conclude that the kilograms of chlorine used daily at the given water treatment plant is 100 kg/day.

4 0
3 years ago
Vitamin A is a very large organic molecule composed of twenty atoms
ExtremeBDS [4]

Answer:

102

Explanation:

(20+1+30)*2

you add the total number of atoms that can be found in one molecule of vitamin A then multiply by 2

3 0
3 years ago
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