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
How many lead atoms are in a cube of lead that has a volume of 2.18 cm3 if the density of lead is 11.3 g/cm3?
Anit [1.1K]
10000000.................
3 0
3 years ago
Why is it important that there is only a small amount of water in the beaker
natita [175]

Answer:

because too much can neutralise the results

4 0
3 years ago
Read 2 more answers
in order to find the molar mass of an unknown compound, a research scientist prepared a solution of 0.930 g of an unknown in 125
PtichkaEL [24]

Answer:

Molar mass→ 0.930 g / 6.45×10⁻³ mol = 144.15 g/mol

Explanation:

Let's apply the formula for freezing point depression:

ΔT = Kf . m

ΔT = 74.2°C - 73.4°C → 0.8°C

Difference between the freezing T° of pure solvent and freezing T° of solution

Kf = Cryoscopic constant → 5.5°C/m

So, if we replace in the formula

ΔT = Kf . m → ΔT / Kf = m

0.8°C / 5.5 m/°C = m → 0.0516 mol/kg

These are the moles in 1 kg of solvent so let's find out the moles in our mass of solvent which is 0.125 kg

0.0516 mol/kg . 0.125 kg = 6.45×10⁻³ moles. Now we can determine the molar mass:

Molar mass (mol/kg) → 0.930 g / 6.45×10⁻³ mol = 144.15 g/mol

3 0
3 years ago
Which statement is true of a
soldier1979 [14.2K]
I think the awnser to your question is C
6 0
2 years ago
What is acid according to arhenias concept?
nignag [31]

Answer:

Acid are those substances which release H + ions when dissolved in water.

Get that hundooo!

7 0
3 years ago
Other questions:
  • (science Q2)<br> please help
    12·2 answers
  • What rusts a nail faster, coke,viniger, or water
    11·1 answer
  • In composting, gardeners allow a pile of plant material such as dead leaves to decay. Composting is a form of combustion.
    8·1 answer
  • Gas laws describe and predict the behavior of gases without attempting to explain why they happen.
    7·1 answer
  • HELP FAST !!!!!!!!!!!!!!!!!!!!!! TIMED!!!!2S + 3O2 ---&gt; 2SO3 Sulfur reacts with oxygen to produce sulfur trioxide gas. If 6.3
    13·1 answer
  • "A student takes 152 mL of a 3.0M HCl solution and places it into a beaker. The student then adds enough water to the beaker to
    6·1 answer
  • The number of valence electrons for 1s22s22p4 is:
    10·1 answer
  • The scientific method is ___ <br>a. linear<br>b. cyclic​
    10·1 answer
  • Which of the following is not a renewable source of energy?
    9·2 answers
  • Which formula is comparing a sample of a gas under two different conditions of volume and temperature, if the pressure is consta
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!