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3 years ago

What is a better indicator in the titration of HCl with Na2CO3, methyl orange or methyl red, and why

Chemistry

1 answer:

irina [24]3 years ago

7 0

HD tuy izle lütfen yalvarırım sana da hayırlı kandiller diliyorum

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What is the chemical equation from table salt made from baking soda

bagirrra123 [75]

NaHCO₃ + HCl → NaCl + H₂O + CO₂

<u>Explanation:</u>

NaHCO₃ + HCl → NaCl + H₂O + CO₂

When Sodium bi carbonate (NaHCO₃) reacts with hydrochloric acid (HCl), it forms table salt (NaCl), water ( H₂O ) and Carbon di oxide (CO₂) gas is evolved.

Here base reacts with acid to form salt and it is the neutralization reaction.

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3 years ago

How many atoms are in 1 mole of ca

Tju [1.3M]

Answer: 6.023 x 10^23

Explanation:

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3 years ago

An unknown substance visually appears to be a white powder. The substance is analyzed in the laboratory and its melting point is

wlad13 [49]

Answer:

See explanation

Explanation:

The substance under analysis must be a polar organic substance of high molecular mass. We must remember that as the magnitude of dispersion forces increases with increase in molecular mass, the melting point increases accordingly. Also polar organic substances have very high melting points due to the presence of polar bonds in the molecule..

Hence the intramolecular forces in the substance are covalent bonds while the intermolecular forces are both dispersion forces and dipole forces.

The substance may likely be 1,2,3,4,6,7,8-Heptachlorodibenzo-p-Dioxin which a white powder and melts at 264 °C.

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3 years ago

Calculate the mass of ammonia (NH3) that contains a billion (1.00 * 10^12) hydrogen atoms.

Lynna [10]

Answer:

The mass of ammonia (NH3) that contains $1.00 \times 10^12$ hydrogen atoms is $9.4\times 10^{-12}$ g.

Explanation:

As $6.022\times 10^{23}$ atoms of hydrogen = 1 mole of the hydrogen atom

Therefore, $10^{12}$ atoms of hydrogen $= \frac{1}{6.022 \times 10^{23}}\times 10^{12}=1.66\times 10^{-12}$ moles of the hydrogen atom.

Now, there are 3 moles of hydrogen atoms in 1 mole of ammonia $(NH_3)$ .

As the mass of 1 mole of ammonia is 17g, so

when there are 3 moles of hydrogen atoms, then the mass of ammonia = 17 g

Therefore, when there are $1.66\times 10^{-12}$ moles of hydrogen atoms, then the mass of ammonia $= \frac{17}{3}\times 1.66\times 10^{-12}=9.4\times 10^{-12$ g.

Hence, the mass of ammonia $(NH_3)$ that contains $1.00 \times 10^12$ hydrogen atoms is $9.4\times 10^{-12}$ g.

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3 years ago

How many atoms of sulfur, S, are in 4.00 g sulfur?

Angelina_Jolie [31]

<h3>Answer:</h3>

7.51 × 10²² atoms S

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

<u>Chemistry</u>

<u>Atomic Structure</u>

Reading a Periodic Table
Using Dimensional Analysis
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<h3>Explanation:</h3>

<u>Step 1: Define</u>

4.00 g S

<u>Step 2: Identify Conversions</u>

Avogadro's Number

Molar Mass of S - 32.07 g/mol

<u>Step 3: Convert</u>

Set up: $\displaystyle 4.00 \ g \ S(\frac{1 \ mol \ S}{32.07 \ g \ S})(\frac{6.022 \cdot 10^{23} \ atoms \ S}{1 \ mol \ S})$
Multiply: $\displaystyle 7.51107 \cdot 10^{22} \ atoms \ S$

<u>Step 4: Check</u>

<em>Follow sig figs and round. We are given 3 sig figs.</em>

7.51107 × 10²² atoms S ≈ 7.51 × 10²² atoms S

5 0

3 years ago

What is a better indicator in the titration of HCl with Na2CO3, methyl orange or methyl red, and why​

What is a better indicator in the titration of HCl with Na2CO3, methyl orange or methyl red, and why