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3 years ago

What would be the definition of chemical indicators?

Chemistry

1 answer:

Gwar [14]3 years ago

5 0

Answer:

Chemical indicator, any substance that gives a visible sign, usually by a colour change, of the presence or absence of a threshold concentration of a chemical species, such as an acid or an alkali in a solution. An example is the substance called methyl yellow, which imparts a yellow colour to an alkaline solution.

Explanation:

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How many hydrogen ions are in 1 liter of stomach acid? (Hint: Avogadro’s number). Show your work and remember to put your answer

ch4aika [34]

Answer:

96,532,000,000,000,000,000,000 ions.

Explanation:

Assume the highest concentration of HCl in the stomach (160 mmol/L) that is in the canaliculi.

This means that 1.0 L of the stomach acid contains 0.160 mol.

Every 1.0 mole of HCl contains Avogadro’s number of molecules (6.022 x 10²³) molecules.

Every 1.0 molecule of HCl contains 1.0 H⁺ ion.

Using cross multiplication:

1.0 mole of HCl → 6.022 x 10²³ H⁺ ions.

0.160 mole of HCl → ??? H⁺ ions.

∴ The no. of H⁺ ions in 1 liter of stomach acid = (6.022 x 10²³ H⁺ ions)(0.160 mole of HCl) / (1.0 mole of HCl) = 9.6352 x 10²² ions = 96,532,000,000,000,000,000,000 ions.

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3 years ago

An 85 kg construction worker has 37 485 J of gravitational potential energy. To the nearest whole number, the worker is___

Dmitry [639]

Answer:

44,1 m

Explanation:

Ep= m * g * h

37485 = 85 * 10 * h

h = 44,1 m

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3 years ago

Casi todos los días usamos el hervidor para calentar el agua con el que hacemos el té o cocinamos los alimentos. Sin embargo, mu

Maru [420]

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3 years ago

Whose atomic theory explains how atoms emit (release) and absorb light?

inn [45]

Answer:

Bohr's model of hydrogen atom

I hope this answer is correct

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3 years ago

Read 2 more answers

Every day on his ride to school, Max sees some sedimentary rock. He starts to wonder: Could material from this sedimentary rock

Sloan [31]

Material from this sedimentary rock ever forms igneous rock, Option D. Yes, if the sedimentary rock is moved below Earth’s outer layer and exposed to energy from Earth’s interior, it can melt into liquid rock and form igneous rock.

Sedimentary rocks are shaped from pre-existing rocks or pieces of soon-as-dwelling organisms. They form from deposits that collect on this planet's floor. Sedimentary rocks regularly have special layering or bedding.

Igneous rock, or magmatic rock, is one of the 3 primary rock kinds, the others being sedimentary and metamorphic. Igneous rock is shaped via the cooling and solidification of magma or lava. The magma may be derived from partial melts of existing rocks in either a planet's mantle or crust.

Learn more about igneous rocks here:-brainly.com/question/6533375

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Disclaimer:- your question is incomplete, please see below for the complete question.

Every day on his ride to school, Max sees some sedimentary rock. He starts to wonder: Could material from this sedimentary rock ever form igneous rock?

A. No, igneous rock can only form out of other igneous rocks. Sedimentary rock cannot change into igneous rock.

B. No, igneous rock forms under Earth’s outer layer due to energy from Earth’s interior, but the sedimentary rock is only at Earth’s surface.

C. Yes, if the sedimentary rock is exposed to energy from the sun at Earth’s surface for a long enough time, it can melt into liquid rock and form igneous rock.

D. Yes, if the sedimentary rock is moved below Earth’s outer layer and exposed to energy from Earth’s interior, it can melt into liquid rock and form igneous rock.

3 0

1 year ago

What would be the definition of chemical indicators?​

What would be the definition of chemical indicators?