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
Norma-Jean [14]
3 years ago
9

Please please please no guessing I had to type this all out. How do oceanographers define saltanily?

Chemistry
1 answer:
Gre4nikov [31]3 years ago
5 0
The correct answer is D. Number of grams of salt per kilometer of water.
You might be interested in
Magnesium (average atomic mass = 24.3050 amu) consists of three isotopes with masses 23.9850 amu, 24.9858 amu, and 25.9826 amu.
iris [78.8K]

Answer: The first isotope has a relative abundance of 79% and last isotope has a relative abundance of 11%

Explanation: Given that the average atomic mass(M) of magnesium

= 24.3050amu

Mass of first isotope (M1) = 23.9850amu

Mass of middle isotope (M2)=24.9858amu

Mass of last isotope(M3)= 25.9826amu

Total abundance = 1

Abundance of middle isotope = 0.10

Let abundance of first and last isotope be x and y respectively.

x+0.10+y =1

x = 0.90-y

M = M1 × % abundance of first isotope + M2 × % of middle isotope +M3 ×% of last isotope

24.03050= 23.985× x + 24.9858 ×0.10 + 25.9826×y

Substitute x= 0.90-y

Then

y = 0.11

Since y=0.11, then

x= 0.90-0.11

x=0.79

Therefore the relative abundance of the first isotope = 11% and the relative abundance of the last isotope = 79%

5 0
2 years ago
A cylinder contains 250 g of Helium at 200 K. The external pressure is constant at 1 atm. The temperature of the system is raise
Black_prince [1.1K]

Answer:

There is 96200 J or 96 kJ of heat released.

Explanation:

<u>Step 1: </u>Data given

Mass of helium = 250 grams

Temperature = 200 K

Temperature is raised by 74 K

The heat capacity of helium = 20.8 J/mol*K

Molecular weight for helium = 4 g/mol

<u>Step 2:</u> Calculate moles of Helium

Moles of Helium = mass of Helium / molar mass of helium

Moles of helium = 250 grams / 4g/mol

Moles of helium = 62.5 moles

<u>Step 3:</u> Calculate heat

Q = n*c*ΔT  or

⇒ with Q = the heat released in Joule

⇒ with n = moles of helium = 62.5 moles

⇒ with c = the heat capacity of helium = 20.8 J/mol*K

⇒ with ΔT = the change in temperature = T2 - T1 = 74 K

Q = 62.5 mol * 20.8 J/mol*K * 74 K

Q = 96200 J = 96 kJ

Since the temperature is raised, this is an exothermic reaction. The heat is released.

There is 96200 J or 96 kJ of heat released.

8 0
3 years ago
The equation most often associated with Newton's Second Law of Motion is
nignag [31]

Answer:

F = ma or Force = mass x acceleration.

Explanation:

Newtons second law is about the force put onto an object. To find this you would use the formula:

Force is equal to mass times acceleration (F=ma)

7 0
3 years ago
Read 2 more answers
True or false. Fossils are the only type of evidence that supports the theory of
never [62]

Answer:

True

Explanation:

The evidence for evolution is found at all levels of organization in living things and in the extinct species we know about through fossils.

3 0
2 years ago
Read 2 more answers
In reality, reactants don't have to react in perfect whole-numbers of moles. In a two-reactant synthesis reaction, usually one
Fofino [41]

Answer:

srry i cant help u with this im so confuse like u just put all of it on there how would anybody answer tht!

?!Explanation:

5 0
2 years ago
Other questions:
  • How many moles of nitrogen are in 2.0×10−2mole of quinine?
    13·1 answer
  • Substances A and B are colorless, odorless liquids that are nonconductors and flammable. The density of substance A is 0.97 g/mL
    7·1 answer
  • Will mark brainliest
    13·1 answer
  • Please help me out arranging the order from smallest to biggest ions
    8·1 answer
  • What is one way water moves through the non living parts of an ecosystem during the water cycle
    8·1 answer
  • A compound C6H12 reacts instantly
    15·1 answer
  • How many moles of Na2CO3 are in 100.0ml of a 2.0M solution?
    11·1 answer
  • Is adding food coloring to frosting a chemical reaction?
    14·2 answers
  • What do gasses have
    8·2 answers
  • Amines are ________. brønsted-lowry bases brønsted-lowry acids neutral in water solution unreactive
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!