1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
GrogVix [38]
3 years ago
14

In the process of attempting to characterize a substance, a chemist makes the following observations: (a) The substance is a sil

very white, lustrous metal. (b) The substance melts at 649 ∘C, (c) The substance boils at 1105 ∘C. (d) The density of the substance at 20 ∘C is 1.738 g/cm3. (e) The substance burns in air, producing an intense white light. (f) The substance reacts with chlorine to give a brittle white solid. (g) The substance can be pounded into thin sheets or drawn into wires. (h) The substance is a good conductor of electricity.
Chemistry
1 answer:
Amiraneli [1.4K]3 years ago
7 0

The question is incomplete, this is the complete question;

In the process of attempting to characterize a substance, a chemist makes the following observations. Which are physical properties and which are chemical properties?

(a) The substance is a silvery white, lustrous metal.

(b) The substance melts at 649 ∘C

(c) The substance boils at 1105 ∘C.

(d) The density of the substance at 20 ∘C is 1.738 g/cm³.

(e) The substance burns in air, producing an intense white light.

(f) The substance reacts with chlorine to give a brittle white solid.

(g) The substance can be pounded into thin sheets or drawn into wires.

(h) The substance is a good conductor of electricity.

Answer:

(a) Physical

(b) Physical

(c) Physical

(d) Physical

(e) Chemical

(f) Chemical

(g) Physical

(h) Physical

Explanation:

(a) The substance is a silvery white, lustrous metal - is appearance which is physical.

(b) The substance melts at 649 ∘C metling point is a physical measurement

(c) The substance boils at 1105 ∘C boiling point is a physical measurement

(d) The density of the substance at 20 ∘C is 1.738 g/cm3 how heavy a substance is,is physical.

(e) The substance burns in air, producing an intense white light. Burning is a chemical change. It is a reaction of a substance with oxygen

(f) The substance reacts with chlorine to give a brittle white solid. This is a chemical reaction as the question says.

(g) The substance can be pounded into thin sheets or drawn into wires. Ductility is a physical change, the substance remains chemically unchanged

(h) The substance is a good conductor of electricity. Any conductivity is physical, the substance remains chemically unchanged

You might be interested in
A solution contains one or more of the following ions: Ag+, Ca2+, and Fe2+. When sodium chloride is added to the solution, no pr
Ksju [112]

Answer:

the ion present in the original solution is Ca2+

Explanation:

Precipitation reactions occur when cations and anions in aqueous solution combine to form an insoluble ionic solid called a precipitate.

<u>Step1</u> : If we add Nacl to the solution, there is no precipitate formed

⇒The only possible ion that can form a precipate with Cl- is Ag+; since there is no precipitate formed, Ag+ is not present

<u>Step2</u> : If we add Na2SO4 to the solution, a white precipitate is formed

The possible ions to bind at SO42- are Ca2+ and Fe2+

But the white precipitate formed, points in the direction of Ca2+

⇒This means calcium is present

<u>Step3</u> : If we add Na2CO3 to the filtered solution, there is a precipate formed

Ca2+ will bind also with CO32- and form a precipitate

So the ion present in the original solution is Ca2+

6 0
3 years ago
Read 2 more answers
What's a certain indicator that a molecule is polar?
qaws [65]
I think the answer is D
6 0
3 years ago
Read 2 more answers
Why do gas molecules move at different speeds at a given temperature?
Gwar [14]

Answer:

Gas molecules move at different speed at a given temputure bc as temp increases they move faster

Explanation:

they move faster bc they gain kinetetic energy

6 0
3 years ago
Why did the big bang not produce a significant proportion of elements heavier than helium?
Travka [436]

The big bang did not produce a significant proportion of elements heavier than helium because the temperatures and densities present in the early universe were not sufficient to support the fusion of heavier elements.

During the first few minute of the big bang, the universe was composed of mostly hydrogen and helium, with very small amounts of lithium and beryllium. As the universe expanded and cooled, the denser regions of the universe collapsed to form the first stars. Inside these stars, the intense pressure and heat generated by nuclear fusion reactions allowed for the production of heavier elements, such as carbon and oxygen. However, elements heavier than helium, such as iron and nickel, require even higher temperatures and densities to be produced, which can only be found in the cores of supernovae. Therefore, the big bang alone did not produce a significant proportion of elements heavier than helium.

to know more about compounds-

brainly.com/question/12166462

#SPJ4

7 0
1 year ago
What internal and external structures do giraffes have that help it survive? List at least 3 structures and explain how each str
Debora [2.8K]

Answer:

The neck, Tongue, Heart and circulation and Lungs.

Explanation:

The Neck: The total length of the giraffe's neck is 6 feet and carries the muscles of about 550 pounds. But the unique characteristics is that it has same vertebrae as humans have i.e. 7.  And to support these heavy muscles at the base of the neck spines are there projecting upwards.

The Tongue: Giraffe has a very avaricious long tongue that helps it to gets different vegetation.

Heart: Surprisingly the heart of the giraffe is small in structure yet powerful. And the blood pressure is quite high, double relatively to human so to pump the blood to its brain along with the long neck.

7 0
3 years ago
Other questions:
  • If 140. mg of fluorine-18 is shipped at 8:00 A.M., how many milligrams of the radioisotope are still active when the sample arri
    8·2 answers
  • For multiple covalent bonds to form in molecules the molecules must contain carbon nitrogen or​
    15·1 answer
  • Unrestricted populations of organisms experience _____.
    14·2 answers
  • What was the Kevin temperature of the flubber when it was first discovered?
    12·1 answer
  • Tommy was walking at a rate of 4
    12·1 answer
  • In the following reaction, how many moles of CO2 will form if 10 moles of C3H4 are reacted? How many moles of O2 will also be co
    8·1 answer
  • Some studies have found that when a person mimics an angry expression, their temperature actually rises.
    5·1 answer
  • Two monoprotic acid solutions (A and B) are titrated with identical NaOH solutions. The volume to reach the equivalence point fo
    15·1 answer
  • Hydrogen bonds within liquid water are attractions between protons and hydroxide ions. are dipole-dipole attractions. are ion-in
    9·1 answer
  • _HNO3+ Fe+2
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!