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
Effectus [21]
3 years ago
10

Bill bye states that “ as more and more species disappear, it is harder and harder to keep the ecosystem in balance because we d

on’t know what?
Chemistry
1 answer:
Aleonysh [2.5K]3 years ago
6 0

Answer:

what th efuter holds and what the specicies need and what is healthy for them.

Explanation:

give me bwanliest pweeas i only need three more

You might be interested in
K = °C + 273 A 4.1 L sample of gas is held at 25 °C. If the gas expands to 6.8 L, what is the final temperature?
gregori [183]

Answer:

221 °C

Explanation:

From the question given above, the following data were obtained:

Initial volume (V₁) = 4.1 L

Initial temperature (T₁) = 25 °C

= 25 °C + 273

= 298 K

Final volume (V₂) = 6.8 L

Final temperature (T₂) =?

The final temperature of the gas can be obtained as follow:

V₁ / T₁ = V₂ / T₂

4.1 / 298 = 6.8 / T₂

Cross multiply

4.1 × T₂ = 298 × 6.8

4.1 × T₂ = 2026.4

Divide both side by 4.1

T₂ = 2026.4 / 4.1

T₂ ≈ 494 K

Finally, we shall convert 494 K to celcius temperature. This can be obtained as follow:

°C = K – 273

K = 494

°C = 494 – 273

°C = 221 °C

Thus the final temperature of the gas is 221 °C

6 0
3 years ago
Calcola la massa (in g) di un oggetto d'oro che ha
AfilCa [17]

translate please I'm confused

Explanation:

.

3 0
3 years ago
To find the number of neutrons in an atom, subtract its _____.
Komok [63]
Subtract it's atomic number from it's mass number
6 0
3 years ago
Read 2 more answers
A compound has been shown to contain 14.5 percent hydrogen and 85.5 percent carbon by mass.
Sedaia [141]

Answer:

  • <em>Option d. Its empirical formula is CH</em><em>₂</em><em>.</em>

Explanation:

The percent composition of the compound allow you to calculate the empirical formula of the compound but is not enough to calculate either the molar mass or the molecular formula. So, since now you can discard options b. and c.

Telling that it is a hydrocarbon (option e.) is true but very vague compared with finding the empirical formula. So, you can also discard the option e.

The fact that the product has a triple bond cannot be concluded from the percent composition, you should find the molecular formula to assert whether it contains or not a triple bond. So, you could discard option a., which lets you only with choice d.

Let us find the empirical formula to be certain that it is CH₂.

1.  <u>First, assume a basis of 100 g of compound</u>:

  • H: 14.5% × 100 g = 14.0 g
  • C: 85.5% × 100 g = 85.5 g

2. <u>Divide each element by its atomic mass to find number of moles</u>:

  • H: 14.0 g / 1.008 g/mol = 14.38 mol
  • C: 85.5 g / 12.011 g/mol = 7.12 mol

3. <u>Divide both amounts by the smallest number, to find the mole ratio</u>:

  • H: 14.38 mol / 7.12 mol ≈ 2
  • C: 7.12 mol / 7.12 mol = 1.

Hence, the ratio is 2:1 and the empirical formula is CH₂.

7 0
3 years ago
PLEASE HELP
anastassius [24]

Answer:

B??? sorry if im wrong

Explanation:

7 0
3 years ago
Read 2 more answers
Other questions:
  • A solution of 10 M NaOH was used to prepare 2 L of 0.5 M NaOH. How many mL of the original NaOH solution are needed?
    15·1 answer
  • If a mineral has a daughter to parent ration of 3:1 (three daughter atoms for every one parent atom), how many half-lives have p
    13·1 answer
  • Base-pairing in DNA involves _____. acid-base reaction ionic bonds hydrogen bonds covalent bonds
    5·2 answers
  • How is the outer core a liquid?
    11·1 answer
  • What kind of reaction is decribed by the following chemical
    8·1 answer
  • What is the overall reaction order for the following rate law: rate = k [A]2[B]?
    8·2 answers
  • - If I initially have a gas at a pressure of 379 mmHg, a volume of 467 mL, and a temperature of
    5·1 answer
  • 10. Which of the following group of colors of the visible light is listed from
    11·1 answer
  • g Imagine that you found a piece of carved wood that has been embedded in glacial ice. The mass of the wood is 50 grams, and 30%
    15·1 answer
  • Why does moon have different appearance?<br><br>NONSENSE = REPORT ​
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!