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
Serhud [2]
3 years ago
14

Question 5(Multiple Choice Worth 2 points)

Chemistry
1 answer:
Sergio [31]3 years ago
3 0
Elements are pure substances which cannot be separated by physical means, in fact they cannot be separated by chemical means either, they are the simplest form of matter, composed of the building blocks of atoms.
You might be interested in
Is heat conductivity a physical or chemical property?
Lena [83]
Chemical property because heat is not electrical.
8 0
4 years ago
Choose the best answer that completes the sentence. A complex ion contains _________________. Group of answer choices a central
STatiana [176]

Answer:

A complex ion contains a central metal ion bound to one or more ligands

Explanation:

A complex ion is consists of a central atom or ion, that is usually metallic, called the coordination centre, and a surrounding array of bound molecules or ions, that are in turn known as ligands or complexing agents.

An example of a complex ion is

[Co(NH3)6]3+

Please go through the attached file for a proper representation of the complex ion.

5 0
3 years ago
Read 2 more answers
The mass of water in a single popcorn kernel was found to be 0.905 grams after it popped at a temperature of 175 °C. Using the i
Rus_ich [418]

Answer:

0.583 kilojoules

Explanation:

The amount of heat required to pop a single kernel can be calculated using the formula as follows:

Q = m × c × ∆T

Where;

Q = amount of heat (J)

m = mass of water (g)

c = specific heat capacity of water (4.184 J/g°C)

∆T = change in temperature

From the given information, m = 0.905 g, initial temperature (room temperature) = 21°C , final temperature = 175°C, Q = ?

Q = m × c × ∆T

Q = 0.905 × 4.184 × (175°C - 21°C)

Q = 3.786 × 154

Q = 583.044 Joules

In kilojoules i.e. we divide by 1000, the amount of heat is:

= 583.04/1000

= 0.583 kilojoules

8 0
3 years ago
Students conduct an experiment:
sweet-ann [11.9K]

Answer:

The balloon becomes inflated

Explanation:

The equation of the reaction between baking soda (sodium bicarbonate) and vinegar(ethanoic acid) is shown below;

NaHCO3 + HC2CH3O2 ------> NaC2H3O2 + H2O + CO2

The gas (CO2) evolved in the process leads to the inflation of the balloon dropped on the bottle in which the reaction is taking pace.

This observation provides evidence that a gas was really evolved in the reaction.

7 0
3 years ago
The inputs for cellular respiration are
katrin [286]
Glycolysis--The breakdown of a glucose molecule into two three-carbon pieces called pyruvate. You will notice that very little ATP is produced in this step and no oxygen is required. ... This step is also where other molecules besides glucose may be fed into the cell respiration<span> process, especially lipids.</span>
5 0
3 years ago
Read 2 more answers
Other questions:
  • Which of the following could result from the fission of carbon?
    6·1 answer
  • Which if the following elements has atoms with the least amount of valence electrons
    10·1 answer
  • Which element is likely to have the highest thermal conductivity
    10·1 answer
  • Why does food wrapped in aluminum foil keep warm for a long time? A) Aluminum foil is an insulator and prevents heat loss by con
    15·2 answers
  • Determine the temperature of 1.42 mol of a gas contained in a 3.00-L container at a pressure of 123 kPa.
    11·1 answer
  • In a chemical reaction , atoms are created/rearranged. The atom are joined together in the same/different arrangements after the
    9·1 answer
  • Which of the following statements about Ideal Gas Law is supported by Charles's Law?
    15·2 answers
  • If there are 20.0g of KOH available, how many grams Ca(OH)2 will form?
    13·1 answer
  • In metallic bonds, electrons are referred to as electrons.​
    7·1 answer
  • How many different types of atoms are in the formula Ba(OH)2 • 8H2O?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!