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
satela [25.4K]
3 years ago
8

Help? Will mark as brainlist!!

Chemistry
1 answer:
DIA [1.3K]3 years ago
7 0

Answer:

1. 4.75

2. 5.50

Explanation:

You might be interested in
Explain how the quantum mechanical model of the atom describes the electron structure of an atom
taurus [48]
Electrons<span> are NOT in circular orbits around nucleus. -The</span>atomic<span> orbital </span>describes<span> the probable location of the electrion </span>Quantum Mechanical Model of the Atom<span> Page 3 There are different kinds of </span>atomic orbitals<span> that differ in the amount of energy and shapes (where the </span>electron<span> probably is).

</span>
7 0
4 years ago
A substance/object that reacts with Sodium is Physical or Chemical??
Anna35 [415]

Answer:

physical

Explanation:

it is physical because you add another chemical to the sodium

3 0
4 years ago
Why doesn't it matter which nonradioactive isotope of oxygen you breathe?
Greeley [361]

Isotopes of an element have same atomic number (number of protons) but vary in the mass number (number of neutrons). The chemical reactivity of an element is not affected by the change in mass number. So, for stable isotopes of Oxygen, (Oxygen-16, Oxygen-17 and Oxygen-18) the biochemical pathway of oxygen breathed in during respiration remains unaffected even with different isotopes. Only the radioactive isotopes of oxygen when breathed in may cause serious health hazards as they emit radiations that may damage the internal organs in the body.

4 0
4 years ago
Read 2 more answers
Consider a transition of the electron in the hydrogen atom from n=5 to n=9. Determine the wavelength of light that is associated
lesantik [10]
Lol i need to answer more and plus n could also = # 4.65
5 0
4 years ago
The Henry's law constant (kH) for O2 in water at 20°C is 1.28e-3 mol/l atm. How many grams of O2 will dissolve in 3.5 L of H2O t
Sophie [7]

Answer : The mass of O_2 dissolved will be, 0.2365 grams

Explanation :

First we have to calculate the concentration of O_2.

As we know that,

C_{O_2}=k_H\times p_{O_2}

where,

C_{O_2} = concentration of O_2 = ?

p_{O_2} = partial pressure of O_2 = 1.65 atm

k_H = Henry's law constant = 1.28\times 10^{-3}mole/L.atm

Now put all the given values in the above formula, we get:

C_{O_2}=(1.28\times 10^{-3}mole/L.atm)\times (1.65atm)

C_{O_2}=2.112\times 10^{-3}mole/L

The concentration of O_2 = 2.112\times 10^{-3}mole/L

Now we have to calculate the moles of O_2

\text{Moles of }O_2=\text{Concentration of }O_2\times \text{volume of solution}

\text{Moles of }O_2=(2.112\times 10^{-3}mole/L)\times (3.5L)=7.392\times 10^{-3}mole

Now we have to calculate the mass of O_2

\text{Mass of }O_2=\text{Moles of }O_2\times \text{Molar mass of }O_2

\text{Mass of }O_2=(7.392\times 10^{-3}mole)\times (32g/mole)=0.2365g

Therefore, the mass of O_2 dissolved will be, 0.2365 grams

4 0
3 years ago
Other questions:
  • How many O atoms are present in 1.04 moles of MgSO4?
    13·1 answer
  • Remember the three roadmaps and how to use them.
    13·1 answer
  • When you squeeze an air-filled balloon, what happens inside?
    14·1 answer
  • A fixed amount of gas occupies a volume of 7.25 l at a pressure of 4.52 atm. what will be the volume occupied if the pressure is
    5·1 answer
  • Atoms of elements at the top of a group on the periodic table are smaller than the atoms of elements at the bottom of the group.
    10·2 answers
  • Choose the best answer that completes the sentence. A complex ion contains _________________. Group of answer choices a central
    6·2 answers
  • 10.0 grams of water are heated during the preparation of a cup of coffee 1.0x 103 j of the heat are added to the water. which is
    12·1 answer
  • The concentration of two reactants is decreased by the same amount. How
    13·1 answer
  • What is a frogs favorite food
    8·2 answers
  • Question 19 of 25
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!