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fgiga [73]
3 years ago
15

True or False: Different substances, like shortening and soap, will melt at the same temperature. True False​

Chemistry
2 answers:
stiks02 [169]3 years ago
8 0
Answer: true

explanation:
Murrr4er [49]3 years ago
7 0

Answer:

false

Explanation:

different things will have different melting points

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What are the chemical properties of beryllium phosphide??
o-na [289]

Answer:

Forms ionic bonds, insoluble, doesn't participate in single or double displacement reactions, non-reactive, high heat of combustion

Explanation:

Beryllium is a metal, since it belongs to group 2A, the alkaline earth metals. It has a total of 2 valence electrons.

Phosphorus, on the other hand, belongs to group 5A and has a total of 5 valence electrons.

We have a compound which has a metal in it, therefore, it's an ionic compound. Beryllium, our metal, loses its 2 electrons to gain an octet and phosphorus, our nonmetal, should gain 3 electrons to have an octet. The oxidation states are +2 and -3 respectively. This means we need 3 beryllium cations and 2 phosphide anions in our formula Be_3P_2.

Beryllium phosphide would be expected to be insoluble, as only beryllium chloride, fluoride, nitrate, phosphate and sulfate are soluble substances, while the remaining ones are expected to be insoluble.

Due to its insolubility, beryllium phosphide would not participate in any ionic reactions, such as single displacement or double displacement.

Since it's insoluble, we expect this compound to be chemically stable and not reactive. This implies that if we wanted to burn it, the heat of combustion would be very high, as a lot of energy would be needed to be supplied in an endothermic reaction in order to burn it.

8 0
3 years ago
The reaction of an alcohol with an organic acid produces a compound classified as
Alik [6]
Answer is: <span>a compound classified as ester.
Reaction of synthesis of estrers</span><span> is calling the </span>Fischer esterification<span>, this is reaction of carboxylic acid with an alcohol in the presence of a </span>dehydrating <span>agent (usually sulfuric acid):
R-COOH + R-OH </span>⇄ R-COOR + H₂O.
Esters are less polar than alcohols and can make <span>hydrogen bonds.</span>
5 0
3 years ago
When you have been swimming and you come out of the pool, you may feel cold. Use your understanding of endothermic processes to
Brrunno [24]

Answer:

An endothermic process is any process with an increase in the enthalpy H (or internal energy U) of the system. In such a process, a closed system usually absorbs thermal energy from its surroundings, which is heat transfer into the system.

8 0
3 years ago
Write a general equation for the reaction of a halogen with a metal. (Assume the oxidation state of metal equal 3) Express your
Elenna [48]

Answer:

General chemical equation

          2 M + 3 X₂ → 2 MX₃

Explanation:

When metal reacts with halogens metal halide as a product obtained.

Now oxidation state of metal assume (+3)

and oxidation state  for halogen = (+1)

So formula of the metal halide is (MX₃)

           Denote the metal as M and halogen as X

                    the balanced chemical equation

                         2 M + 3 X₂ → 2 MX₃

So the resulted general equation when metal react with halogen is

                                       2 M + 3 X₂ → 2 MX₃

8 0
3 years ago
Which of these compounds are oxoacids (also known as oxyacids)?
devlian [24]

At the very least, an oxoacid must 1) be an acid and 2) contain oxygen.

Ba(OH)2 (barium hydroxide) is a strong base. HCN, HF, and hydrochloric acid (HCl) don't contain oxygen.

Nitrous acid (HNO2) is an acid, and it contains oxygen. And the acidic hydrogen is bonded to an oxygen. Thus, nitrous acid qualifies as an oxoacid.

I don't know if H2PO4 is a typo; if not, then it would properly be written as H2PO4⁻ since it's the first deprotonation product of phosphoric acid, H3PO4. In any case, H2PO4⁻ is still acidic, albeit weakly, and its acidic hydrogens are bonded to the oxygen atoms. Thus, "H2PO4" would qualify as an oxoacid (for that matter, H3PO4 would also be an oxoacid).

Chloric acid (HClO3) is an acid, and it contains oxygen; its acidic hydrogen is bonded to an oxygen atom. Thus, chloric acid qualifies as an oxoacid.

3 0
2 years ago
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