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
NeTakaya
2 years ago
11

Platinum-189 What is the atomic number

Chemistry
1 answer:
bazaltina [42]2 years ago
7 0

Answer:

78

Explanation:

You might be interested in
Which of the following describes a covalent bond?
Marizza181 [45]

Answer:

D. It is the sharing of electrons between atoms with an electronegativity difference below 1.7

Covalent bonds share electrons, whereas ionic bonds exchange electrons. Covalent bonds have an electronegativity of 0.0-1.7 (0.0-0.3 is a nonpolar covalent bond and 0.3-1.7 is a polar covalent bond). Ionic bonds are bonds that go beyond the electronegativity of 1.7 to 4.0 (1.7-4.0).

7 0
3 years ago
Read 2 more answers
How many σ and π bonds are present in a molecule of cumulene?
dimaraw [331]

A hydrocarbon with three or more consecutive (cumulative) double bonds is known as a cumulene. They are analogous to allenes, only exhibiting a more elongated chain. The basic molecule in this category is butatriene, which is also simply known as cumulene.  

In the structure of a cumulene, there are 3 double bonds and 4 single bonds. The double bond comprises 1 sigma bond, and 1 pi bond and 4 hydrogen bond produces a sigma bond with carbon. Thus, the molecule of cumulene comprises 7 sigma bonds and 3 pi bonds.  


3 0
3 years ago
Read 2 more answers
To arrive at the number of hydrogen atoms, What can be said about the relationship between the number of hydrogen atoms and the
Semenov [28]

Answer:

nothing shsheysyeggehssl

6 0
3 years ago
N2 reacts with hydrogen gas according to the following equation:
slega [8]

Answer:

Mass = 51 g

Explanation:

Given data:

Mass of nitrogen = 41.93 g

Mass of ammonia formed = ?

Solution:

Chemical equation:

N₂ + 3H₂      →       2NH₃

Number of moles of nitrogen:

Number of moles = mass/molar mass

Number of moles = 41.93 g/ 28 g/mol

Number of moles = 1.5 mol

now we will compare the moles of nitrogen and ammonia.

                N₂          :           NH₃

                  1          :           2

                1.5         :         2/1×1.5 = 3 mol

Mass of ammonia formed:

Mass = number of moles × molar mass

Mass = 3 mol × 17 g/mol

Mass = 51 g

6 0
2 years ago
Please help me! I will fail science if I don’t finish this test :(
Tasya [4]

Answer:

<h2>A. Mercury's orbit is shorter than Earth</h2>
6 0
3 years ago
Other questions:
  • 9.03g of magnesium combine completely with 4.30g of nitrogen
    15·1 answer
  • How do you perform calculations relating to isotopes. describe please
    7·1 answer
  • How does global evaporation compare to global precipitation​
    12·1 answer
  • The insoluble salts AV, B2W, C2X3, DY2, and EZ3, which were formed from the metal ions A+, B+, C3+, D2+, and E3+ and the nonmeta
    9·1 answer
  • Since air is a type of matter, air must be made out of tiny particles that are called _______.
    10·2 answers
  • s sample of thorium-234 has a half life of 25 days. will all the thorium undergo radioactive decay in 50 days?
    14·1 answer
  • Help answer fast please What is an example of homestasis?
    15·1 answer
  • Do you think it is important for archaeological sites to be protected from development once they are discovered? What are the pr
    8·1 answer
  • Using your knowledge of properties of matter, choose the correct description: Question 3 options: physical prop. are luster, col
    5·1 answer
  • I will mark brainlest
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!