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
Natasha2012 [34]
3 years ago
9

At STP or standard conditions, which list of elements contains a solid, a liquid, and a gas?

Chemistry
1 answer:
SIZIF [17.4K]3 years ago
4 0

Answer:

B.hafnium, mercury,helium

Explanation:

because the atomic number of hafnium is 72is a solid, mercury is a gas the atomic number is 80,

helium is a gas the atomic number is 2

You might be interested in
What does osmosis depend on? A. the identity of the solute and solvent B. how much solvent is present in the solution C. the num
KengaRu [80]

Osmosis is a special kind of diffusion where solvent particles move through a semi permeable membrane from low concentration of solute to high concentration of solute.

so it depends upon

a) how much solvent is present : More the solvent on one side of semipermeable membrane more the movement of solvent particles on the other side of membrane


6 0
3 years ago
A sample of Copper absorbs 43.6 KJ of heat, resulting in a temperature rise of 75.0 oC, determine the mass (in Kg) of the copper
yanalaym [24]

Explanation:

here is the answer to your question

3 0
3 years ago
Blood samples for research or medical tests sometimes have heparin added. Why is this done? ​
alina1380 [7]
It is essential for accurate results that the correct volume of blood is sampled to achieve a correct concentration (and dilution, if liquid heparin is used), and that blood and anticoagulant are well mixed immediately after sampling.
8 0
3 years ago
How many unpaired electrons are in the c 2 + ​ ion?
sladkih [1.3K]
Atomic number of C is 6. Hence, there are 6 electrons in carbon.

The electronic configuration of carbon is 1s2, 2s2, 2p2

Here, there are 2 unpaired electron. However, C2+ ions have 2 electrons less as compared to C.

Hence, electronic configuration of C 2+ ion is 1s2, 2s2. All the electrons are paired in this system. So there are no unpaired electrons in C 2+ ion. 
7 0
4 years ago
If 3.91 moles of H2 were used, how many moles of NH3 would be made?<br><br> HELP PLEASE ASAP
matrenka [14]

N + H2 → NH3

balance the equation

2N + 3H2 → 2NH3

3H2 → 2NH3

3 : 2

3.91 ÷ 3 = 1.303 mol

1.3 × 2 = 2.606 mol

7 0
3 years ago
Other questions:
  • Which description correctly characterizes the acidity or basicity of a solution? The higher the pH is, the more the hydroxide io
    14·2 answers
  • A small amount of a solid is added to water. The observation made after fifteen minutes is shown in the figure. Which of these s
    12·1 answer
  • 14 Which property is a measure of the average kinetic energy of the particles in a sample or matter?
    5·1 answer
  • In the reaction, A -----&gt; Products, the rate constant is 3.6 x 10^−4 s−1. If the initial concentration of A is 0.548 M, what
    12·1 answer
  • Two electron(s) are removed from an carbon atom. Enter the chemical symbol of the element.
    11·1 answer
  • Help please
    6·2 answers
  • What structures are found in<br> plant cells that are not found in animal cells?
    5·1 answer
  • Calculate the mass of sodium hydroxide needed to make a 5.00L with a molarity of 0.400M​
    12·1 answer
  • A student writes down several steps of the scientific method. Put the steps in the best order.
    8·1 answer
  • **Start each example by writing the density equation, then plug in the<br> numbers.**
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!