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
OLEGan [10]
3 years ago
5

Which statement best explains why so many fossils look different from the millions of species currently living on Earth?

Chemistry
2 answers:
lianna [129]3 years ago
3 0

B. Most species that have lived on earth are now extinct. Ap3x

Nana76 [90]3 years ago
3 0

Answer:

B.

Explanation:

Most species that have lived on Earth are now extinct

<><><><><><><><><><><><><><><><><><><><><><><><>

A P E X

You might be interested in
Instead of 6 M NaOH being added to the solution, 6 M HCl is added. How will this affect the test for the presence of ammonium io
Lera25 [3.4K]

Answer:

Ammonia gas(an alkaline gas with characteristics of choking or irritating smell) is not liberated when 6mole of HCl is added to the solution instead of 6mole of NaOH, to test for the presence of ammonium ion in the solution

Explanation:

As expected, when testing for ammonium ion in a solution (precisely ammonium salt solution), Sodium Hydroxide (NaOH) is required as the test reagent.

When NaOH is added to the solution, A gas with characteristics of choking or irritating smell is liberated.

This gas turn red litmus paper blue.

This liberated gas is an alkaline gas, which is confirmed as an ammonia gas(NH3).

If HCl is added instead of NaOH, the ammonia gas will not be liberated, which indicates that the test reagent used is wrong.

3 0
3 years ago
Pls help, needed for chemistry
vovangra [49]

Answer:

go to a calculator and see the answer then make the hypothisis which is the answer

Explanation:

magic

7 0
2 years ago
A compressor takes 0.50 m3 of a gas at 33°C and 760 mmHg and compresses it to 0.10 m3, cooling it to -55°C at the same time. Wha
vodomira [7]

Answer is C.

Converting temperatures to degrees K: 33 degrees C = 306 K and -55 = 218 degrees K.

By the ideal gas law:-

760 * 0.50 / 306  = P * 0.10 / 218    

P =  760 * 0.50 * 218 / 306 * 0.10

= 2700 mm Hg  answer

3 0
3 years ago
When an electron is displaced in a semi conductor, the hole that’s left behind is?
lisov135 [29]

Explanation:

holes are left due to space left out the migrating electrons. they are positive charge carriers. if the electron moves in one direction, the holes appear to move in the opposite direction.

6 0
3 years ago
The electron in a hydrogen atom can undergo a transition from n = 4 to n = 3, emitting a photon with energy 1.06 × 10 –19J. Use
konstantin123 [22]

Answer:

Wavelength (λ) = 1.875 × 10⁻⁶ m

Explanation:

Given:

Energy (e) =  1.06 × 10⁻¹⁹ J

Find:

Wavelength (λ) = ?

Computation:

e = hc / λ

λ = hc / e

where c = 3 × 10⁸

Planck's constant (h) = 6.625 × 10⁻³⁴

So,

Wavelength (λ) = (6.625 × 10⁻³⁴)(3 × 10⁸) / (1.06 × 10⁻¹⁹)

1. Wavelength (λ) = 1.875 × 10⁻⁶ m

2. Given n = 4 to n = 3 both are integer not fraction so, electron is quantize

5 0
3 years ago
Other questions:
  • The hot dogs you ate at the barbecue last week were 75% fat-free by weight, had 275 calories, and weighed 110 g. a) What percent
    8·1 answer
  • Which tool was most likely used in a procedure if the lab report shows that approximately 300 mL of water was used?
    12·1 answer
  • A gas of unknown molecular mass was allowed to effuse through a small opening under constant-pressure conditions. It required 10
    5·1 answer
  • Calculate the ΔH o for the reaction: Fe3+(aq) + 3OH−(aq) → Fe(OH)3(s) ΔH o = kJ/mol Substance ΔH o f (kJ/mol) ΔG o f (kJ/mol) S
    15·1 answer
  • If you have 120. mL of a 0.100 M TES buffer at pH 7.55 and you add 3.00 mL of 1.00 M HCl, what will be the new pH? (The pKa of T
    5·1 answer
  • 34. 3.15 mol of an unknown solid is placed into enough water to make 150.0 mL of solution. The solution's temperature increases
    8·1 answer
  • A) How much energy would be required to melt 500 grams of ice at 0°C to water at 0°C?
    11·1 answer
  • Week 4 learning task 1 science 4th quarter​
    14·1 answer
  • During which phase of mitosis do the sister chromatids pull apart?
    5·2 answers
  • Write the skeleton equation for the reaction between hydrochloric acid (HCl) and zinc. The products are hydrogen gas and zinc ch
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!