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faust18 [17]
3 years ago
7

Explain why there is a need for an universal system of measurement. Why is the metric system of measurement convenient to use

Chemistry
1 answer:
docker41 [41]3 years ago
4 0

Answer:

I am not sure

Explanation:

sorry

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How many moles of carbon in 6.64 moles of CCl2 F
Bad White [126]

Answer: 6.64 moles of carbon.

Explanation:

Given data:

Number  of moles of C = ?

Number of moles of CCl₂F₂ = 6.64 mol

Solution:

In one mole of CCl₂F₂ there is one mole of carbon two moles of chlorine and two moles of fluorine are present.

In 6.6 moles of CCl₂F₂ :

Moles of carbon = 6.64 × 1 = 6.64 moles of carbon.

Moles of chlorine = 6.64× 2 = 13.28 moles of chlorine

Moles of fluorine = 6.64× 2 = 13.28 moles of fluorine

Read more on Brainly.com - brainly.com/question/15602143#readmore

3 0
3 years ago
Select the correct answer. When an atom in a reactant loses electrons, what happens to its oxidation number? A. Its oxidation nu
vfiekz [6]

Answer:

C. Its oxidation number increases.

Explanation:

  • <em><u>Oxidation is defined as the loss of electrons by an atom while reduction is the gain of electrons by an atom</u></em>.
  • Atoms of elements have an oxidation number of Zero in their elemental state.
  • When an atom looses electrons it undergoes oxidation and its oxidation number increases.
  • For example, <em><u>an atom of sodium (Na) at its elemental state has an oxidation number of 0. When the sodium atom looses an electrons it becomes a cation, Na+, with an oxidation number of +1 , the loss of electron shows an increase in oxidation number from 0 to +1.</u></em>
8 0
3 years ago
Read 2 more answers
Classify the following compounds as ionic or covalent:. a.H2O. b.C6H12O6. c.CuBr2. d.KMnO4. e.C2H6. f.Fe(C2H3O2)3. . How do you
Papessa [141]
Ionic compounds are compounds composed of a metal as the cation (positive charge) and non-metals as anion (negative charge). Covalent compounds are composed of both non-metals. In this respect, a) water is covalent b) covalent c) ionic d) ionic e) covalent f) ionic. 
4 0
2 years ago
The following is a list of common errors encountered in research laboratories. Categorize each as a determinate or an indetermin
Kay [80]

Answer:

An unknown being weighed is hygroscopic. - operative error

One component of a mixture being analyzed quantitatively by gas chromatography reacts with the column packing. - methodic error

The tip of the pipet used in the analysis is broken. - instrumental error

In measuring the same peak heights of a chromatogram, two technicians each report different heights - operative error

Explanation:

In chemical analysis, operative errors are that largely introduced into the measurement because of variation of personal judgements of analysts. It is also a personal error that emanates solely due to the analyst.

A methodic error arises as a result of adopting defective experimental methods. For example, a column packing that reacts with a component of the mixture is used in the gas chromatography.

Instrument error refers to the error of a measuring instrument, for instance, the use of a pipette with a broken tip.

4 0
3 years ago
Which is a property of potassium (K)? O A. It is dull and brittle. O B. It is not reactive. O C. It is white and hard. O D. It i
atroni [7]

Answer:

D. It is extremely reactive.​

Explanation:

Potassium has atomic number of 19 and belongs to the group 1 elements.

A. It is dull and brittle

This is not true as potassium is a metal with a silver lustre.

B. It is not reactive

This is false. Because it is a group 1 element, it would readily lose it's electron to achieve octet configuration making it a reactive metal.

C. It is white and hard.

Potassium is a white metal, however it is not hard. Rather it is soft.

D. It is extremely reactive.​

This is correct. Because it is a group 1 element, it would readily lose it's electron to achieve octet configuration making it a reactive metal.

5 0
3 years ago
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