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
gladu [14]
3 years ago
11

Write the symbol for every chemical element that has atomic number greater than 55 and atomic mass less than 144.0 u

Chemistry
1 answer:
laila [671]3 years ago
3 0
You will need a periodic table to help you answer this problem. The atomic numbers are arrange from lowest to highest in the periodic table. You can locate element number 55 to be Cesium with an atomic weight of 132.905 amu. So, you start from element 56. The following elements are:

56     Barium       137.328 amu
57     Lanthanium   138.905 amu
58     Cerium       140.116 amu
59     <span>Praseodymium    140.908 amu
60     Neodymium   144.243 amu

Neodymium is already greater than 144 amu. Therefore, these elements only include Barium, Lanthanium, Cerium and Praseodymium.</span>
You might be interested in
Look at the Recording station detector on the upper left side of the Gizmo. What happens when the seismic waves hit the recordin
Ne4ueva [31]

Answer:

I don’t know what recording station you’re referring to but, When seismic waves reach the seismograph, a graphical record, or seismogram, is produced

Explanation:

4 0
3 years ago
Is burning a wooden match chemical or physical change
qwelly [4]
Chemical. burning is a chemical change
8 0
3 years ago
Read 2 more answers
Why is accurate body measurement important in dressmaking​
Lilit [14]

Answer:

Without taking body measurements, the fabric material can run out of supply if the tailor uses it too much. And more material is required to fix small dresses or suits. So when body measurements are taken accurately, the tailor will know the exact amount of material to be used.

Explanation:

3 0
2 years ago
Through which of the following ways can heat be transferred?
SashulF [63]

Answer:

The correct option is:

A) by direct or indirect contact between objects at different temperatures

Explanation:

Heat can be transferred in three different methods:

Conduction, Convection and Radiation

Conduction is heat transfer through direct contact between substances at different temperatures.

Convection is the heat transfer which takes place through air currents.

Radiation is the heat transfer that does not require contact between two objects.

Hence, heat transfer can take place through direct or indirect contact between objects at different temperatures.

4 0
3 years ago
A gas mixture consists of 60.0% Ar, 30.0% Ne, and 10.0% Kr by volume. If the pressure of this gas mixture is 80.0 kPa, what is t
Nat2105 [25]

Answer: The partial pressure of Argon , Neon and krypton are 48 kPa , 24 kPa and 8 kPa respectively.

Explanation:

According to Raoult's Law , the partial pressure of each component in the solution is equal to the total pressure multiplied by its mole fraction. It is mathematically expressed as

p_A=x_A\times P_{total}

where, p_A = partial pressure of component A

x_A = mole fraction of A

P_{total} = total pressure

mole fraction of Ar = \frac{\text {Moles of Ar}}{\text {total moles}}=\frac{60.0}{60.0+30.0+10.0}=0.6

p_{Ar}=0.60\times 80.0kPa=48kPa

mole fraction of Ne = \frac{\text {Moles of Ne}}{\text {total moles}}=\frac{30.0}{60.0+30.0+10.0}=0.30

p_{Ne}=0.30\times 80.0kPa=24kPa

mole fraction of Kr = \frac{\text {Moles of Kr}}{\text {total moles}}=\frac{10.0}{60.0+30.0+10.0}=0.10

p_{Kr}=0.10\times 80.0kPa=8kPa

4 0
3 years ago
Other questions:
  • The density of a substance with a mass of 40.0g and a volume of 10ml is?
    7·1 answer
  • HELP ASAP PLEASE!!!
    5·1 answer
  • How do genetic factors influence the formation of "dead zones” around creosote bushes?
    8·2 answers
  • Are single called bacteria
    5·2 answers
  • Mr. Aguilar has ice on his wrist, literally. If the ice on Mr. Aguilar’s wrist (H2O) weighs 546 grams, how many ice particles ar
    7·1 answer
  • Which scientist was first to extensively develop the theory of continental drift?
    13·2 answers
  • Which is denser air or carbon dioxide
    15·1 answer
  • What is produced during the replacement reaction of Cu(NO3) and zn
    10·2 answers
  • [10 pts]Iron and vanadium both have the BCC crystal structure and V forms a substitutional solid solution in Fe for concentratio
    5·1 answer
  • Afirmar que el h20 es la formula que corresponde al agua, esto es una teoría, idea, ley, hipotesis o experimentación
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!