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Marrrta [24]
3 years ago
11

Which of the following best represents potential energy being converted to kinetic energy

Chemistry
1 answer:
Setler [38]3 years ago
3 0

Where are the options

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A correct name for fe(no3)2 is __________.
Pani-rosa [81]
Well i believe it is Iron (II) nitrate
8 0
3 years ago
How do you determine the number of valence electrons in an atom?
sdas [7]
The number of Valence electrons are the same number as the group the element is in. For example Carbon is in group 4 and has 4 Valence electrons.
8 0
3 years ago
Phenol is a compound that contains 76.57% carbon, 6.43% hydrogen, and 17.0% oxygen. Calculate the empirical formula.
Ulleksa [173]

Answer:

C₆H₆O

Explanation:

The given values are the percentage in mass of each element. Empirical formula is the simplest ratio of atoms presents in a molecule. Thus, the first we need to do is convert this percentage to mass using molar mass of each element:

<em>Moles C:</em>

76.57C * (1mol / 12g) = 6.38 moles C

<em>Moles H:</em>

6.43 * (1mol / 1g) = 6.43 moles H

<em>Moles O:</em>

17.0% * (1mol / 16g) = 1.06 moles O

Dividing each number of moles in the moles of O (The minimum number of moles. Used to obtain "The simplest ratio..."):

C = 6.38 moles C / 1.06 moles O = 6

H = 6.43 moles H / 1.06 moles O = 6

O = 1.06 moles O / 1.06 moles O = 1

That means empirical formula of phenol is:

<h3>C₆H₆O</h3>

3 0
3 years ago
Which of the following most closely typifies the sintering temperatures in PM? (a) 0.5 Tm, (b) 0.8 Tm, (c) Tm, where Tm = meltin
SashulF [63]

Answer:

The correct option is;

(b) 0.8 Tm

Explanation:

Sintering is a form of heat treatment given to introduce a material in powdery form in order to introduce the properties of integrity and strength

by the application of heat to the powder at a temperature below its melting point.

With regards to imparting favorable metal properties in the metal to undergo sintering such as ductility, toughness, porosity, hardness, strength it is required to select a sintering temperature higher than 0.6 - 0.8 Tm.

3 0
3 years ago
Which statement best describes the polarity of CH2Cl2? View Available Hint(s) Which statement best describes the polarity of ? T
Jlenok [28]

Answer: Option (a) is the correct answer.

Explanation:

The compound CH_{2}Cl_{2} is tetrahedral in nature. But due to difference in electronegativity of both carbon and chlorine, chlorine is more electronegative than carbon.

Whereas carbon is more electronegative than hydrogen atom.

As a result, there will be individual bond moment which is unequal and leads to net dipole moment into the molecule.

Hence, the compound CH_{2}Cl_{2} will always be polar in nature.

Thus, we can conclude that the statement molecule is always polar, describes the polarity of CH_{2}Cl_{2}.

5 0
3 years ago
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