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3 years ago

Claudia performed a flame test in her lab. The result of her flame test is shown here.

Chemistry

2 answers:

Masteriza [31]3 years ago

6 0

Answer:

Where is the results and what is the question or is there a picture

Explanation:

agasfer [191]3 years ago

6 0

Answer:

The flame test is used to identify certain elements. This is because, when heated, each element will give a special flame color. This color refers to the element itself.

Flame test works best on elements of the first group.

Now, scientific questions means that we are asking for cause and effect.

Examining the given choices, we can identify the scientific questions as follows:

1- What element causes this flame color?

2- Will the flame color change if another element is added?

3- Will changing the temperature affect the flame color?

Explanation:

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Karolina [17]

Answer:

37 mmol of acetate need to add to this solution.

Explanation:

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$pH=pK_{a}(acetic acid)+log[\frac{mmol of CH_{3}COO^{-}}{mmol of CH_{3}COOH }]$

Here pH is 5.31, $pK_{a}$ (acetic acid) is 4.74 and number of mmol of acetic acid is 10 mmol.

Plug in all the values in the above equation:

$5.31=4.74+log[\frac{mmol of CH_{3}COO^{-}}{10}]$

or, mmol of $CH_{3}COO^{-}$ = 37

So 37 mmol of acetate need to add to this solution.

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3 years ago

if an element [x] contains 8 protons, 8 neutrons and 8 electrons, the atomic number of the element is ?

Kaylis [27]

Answer:

Explanation:

The atomic number refers to the number which identifies the element, which is the proton number.

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3 years ago

An economical substitute for vitreous silica is a high-silica glass made by leaching the B2O3-rich phase from a two-phase borosi

stich3 [128]

Answer:48kg of SiO2, 0.5kg of Al2O3, and 1.5kg of B2O3

Will be the final product

Explanation:

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III) 3wt% of B2O3 will amount to 3/100*50 = 0.03*50=1.5kg of B2O3..

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Answer:

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