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
pochemuha
3 years ago
15

A biological community together with its physical habitat constitutes a(n) ____________ .

Chemistry
1 answer:
lesya [120]3 years ago
4 0

Answer:

Ecosystem

Explanation:

I got the answer from the Mcgrawhill textbooks.

You might be interested in
The atomic mass of chlorine is listed as 35.454 amu on the periodic table. It has two naturally occurring isotopes, Cl-35 and Cl
Fynjy0 [20]
X=percentage of Cl-35
(1-x)=percentage of Cl-35

35(x)+37(1-x)=35.454
35x+37-37x=35.454
-2x=35.454-37
-2x=-1.546
x=-1.546/(-2)
x=0.773

0.773=77.3/100=77.3%

(1-x)=1-0.773=0.227

0.227=22.7/100=22.7%

answer: the percentages are: 77.3% of Cl-35 and 22.7% of Cl-37. 

7 0
2 years ago
0.556 g of a solid white acid are dissolved in water and completely neutralized by the addition of 52.38 mL of 0.396 M NaOH. Cal
Veseljchak [2.6K]

Answer:

M_{acid}=26.804g/mol

Explanation:

Hello,

In this case, by knowing that the used NaOH equals in moles the acid (monoprotic) as shown below, during the titration:

n_{acid}=n_{NaOH}

By knowing the volume and the concentration of the NaOH, one obtains:

n_{acid}=0.05238L*0.396\frac{mol}{L}=0.0207mol

Thus, the molar mass of the acid is computed based on the previously computed moles and the given mass as follows:

M_{acid}=\frac{m_{acid}}{n_{acid}}=\frac{0.556g}{0.0207mol}=26.804g/mol

Best regards.

7 0
3 years ago
Explain what is meant by Pleistocene ice age
makkiz [27]

By Pleistocene ice age is meant the glacial periods that appeared in the Pleistocene. The Pleistocene is the first epoch of the Quaternary. It is an epoch when there was a so called ''ice age'' on the Earth, or rather a glacial period. During this ice age the planet had much lower temperatures on a global scale. The climate was also much drier. Lot of ocean water was frozen in the ice sheets that were stretching deep into the North American and Eurasian continents, which resulted in much lower sea levels that today as well. The places further north than 40 degrees of latitude were almost exclusively covered with ice, so life was almost impossible apart from some coastline places.

7 0
3 years ago
Calculate the density of a cube of iron that measures 3.50cm, 0.755 cm, 2.25cm on each side and weighs 47.0g?
laila [671]

Answer: 7.90 g/cm^3

Explanation:

Density = Mass / Volume

The first step is to find the volume by multiplying the three measures of the cube that have been provided.

3.50 x 0.755 x 2.25 = 5.95 cm^3

Now we can plug the numbers into our equation.

Density = 47.0g / 5.95 cm^3

Density = 7.90 g/cm^3

5 0
3 years ago
Almost. treating an acyl chloride with a grignard reagent tends to form (via two steps) an alcohol. what reagent forms the keton
PIT_PIT [208]
Reaction of Acyl Halides with Grignard reagent results in the formation of Ketones in first step. While in second step reaction of Grignard reagent with Ketones results in the formation of Tertiary Alcohols.

If you want to stop the reaction at Ketone stage then you are required to use another mild reactive organometallic compound. In our case we will use Organocuprates. Organocuprates are also known as Gilman Reagents. These reagents does not add to ketones, aldehydes and esters but they can add to acid halides to produce Ketones.

8 0
3 years ago
Other questions:
  • At a certain temperature this reaction follows first-order Kinetics with a rate constant of 0.0660
    13·1 answer
  • What is the molarity of a barium hydroxide solution if 93.9 mL is completely titrated by 15.3 mL of 0.247 M sulfuric acid soluti
    6·1 answer
  • Density of Unknown Substance
    12·1 answer
  • During STATIC ELECTRICITY to what type of objects & direction do electrons ALWAYS move to?
    14·1 answer
  • How many protons electrons and neutrons respectively does 29 CS have
    12·1 answer
  • Consider the reaction, 2 D(g) + 3 E(g) + F(g) => 2 G(g) + H(g) When D is decreasing at 0.15 mol/Ls, how quickly is E decreasi
    10·1 answer
  • Two students are having a tug of war. The flag on the rope begins at point Y. team A pulls to the left with force of 120 N. Team
    14·1 answer
  • If there are 100 black beans, 27 brown beans, and 173 white beans in the container, what is the percent composition of the conta
    6·1 answer
  • A dancer lifts his partner above his head with an acceleration of 3 m/s². The dancer exerts a force of 175 newtons. What is the
    6·1 answer
  • Which statement correctly describes 1 mole of iodine (I₂)
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!