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
adoni [48]
2 years ago
10

The validity of scientific theories and laws depends on evidence. Which of the following statements of evidence supports a law r

ather than a theory?
Electrons orbit the nucleus of an atom within a certain radius.
DNA analysis reveals that a modern species is related to an extinct species.
Seafloor spreading occurs at a rate of three centimeters per year in the mid-Atlantic.
The amount of matter in a closed system is the same at the start of a reaction as at the end of the reaction.

Chemistry
2 answers:
Ksju [112]2 years ago
4 0

Answer:

d the amount of matter in a closed system is the same at the start of a reaction as at the end of the reaction

mr_godi [17]2 years ago
3 0

Answer:

D

Explanation:

i am doing the test rn and i found the answer in other places

You might be interested in
How many atoms and ions does nickel oxide have?
Alex73 [517]

Answer: 1 atom

Explanation:

The loss of the remaining valence electron results in an ion with a +2 charge. The proper way of noting the charges on these ions is to use the systematic name for each ion, nickel (I) for the +1 ion and nickel (II) for the +2 ion.

4 0
2 years ago
[24 points] A sample of soil has a total volume of 205 cm3. The soil mass when saturated is 361 g. A specific yield test was con
telo118 [61]

Answer:

Follows are the solution to the given question:

Explanation:

Dry Soil weight = solid soil weight = 284 \ grams

solid soil volume =205 \ cc

saturated mass soil = 361 \ g

The weight of the soil after drainage is =295 \ g

Water weight for soil saturation = (361-284) = 77 \ g

Water volume required for soil saturation =\frac{77}{1} = 77 \ cc

Sample volume of water: = \frac{\text{water density}}{\text{water density input}}

= 361- 295 \\\\ = 66 \ cc

Soil water retained volume = (draining field weight - dry soil weight)

                                             = 295 - 284 \\\\ = 11 \ cc.

\text{POROSITY}= \frac{\text{Vehicle volume}}{\text{total volume Soil}}

                    = \frac{77}{(205 + 77)}  \\\\= \frac{77}{(282)}  \\\\ = 27.30 \%

(Its saturated water volume is equal to the volume of voids)

\text{YIELD SPECIFIC} = \frac{\text{Soil water volume}}{\text{Soil volume total}}

                              = \frac{66}{(205+77)}\\\\= \frac{66}{(282)}\\\\=0.2340\\\\ = 0.23

\text{Specific Retention}= \frac{\text{Volume of soil water}}{\text{Total soil volume}}

                            = \frac{11}{282} \\\\= 0.0390 \\\\ = 0.04

6 0
3 years ago
Pleasee help me I really need an answer help
Juliette [100K]

Answer:

This is hard for me also but I am trying to find out answer

Explanation:

Please mark me as brainlist.

6 0
3 years ago
What are resources?​
Georgia [21]

Answer:

A resource is a source or supply from which a benefit is produced.

Explanation:

hope it helped :)

6 0
3 years ago
For each pair below, select the sample that contains the largest number of moles. Pair A 2.50 g O2 2.50 g N2
raketka [301]

Answer:

Explanation:

Pair  2.50g of O₂ and 2.50g of  N₂

The atoms sample with the largest number of moles since the masses are the same would be the one with lowest molar mass according the the equation below:

Number of moles = \frac{mass }{molarmass}

Atomic mass of O = 16g and N = 14g

Molar mass of O₂ = 16 x 2 = 32gmol⁻¹

Molar mass of N₂ = 14 x 2 = 28gmol⁻¹

Number of moles of O₂ = \frac{2.5}{32} = 0.078mole

Number of moles of N₂ = \frac{2.5}{28} =  0.089mole

We see that N₂ has the largest number of moles

4 0
3 years ago
Read 2 more answers
Other questions:
  • What reaction shows one element taking the place of another in a compound?
    14·1 answer
  • Which of the following does not participate in, nor is a component of, the electron transport chain? (Remember that molecules ca
    8·1 answer
  • Using this reversible reaction, answer the following:
    5·2 answers
  • Density is the measure of how much __________ is contained in a given volume
    11·1 answer
  • Daniel has a sample of pure copper.its mass is 89.6 grams (g),and its volume is 10 cubic centimeters (cm3). whats the destiny of
    14·1 answer
  • What is always true of an object with a lot of mass?
    5·1 answer
  • A hurricane's surface winds are responsible for transporting water vapor into the
    13·2 answers
  • The reaction between between common salt and concentrated tetraoxosulphate(vi) acid will liberate
    15·2 answers
  • According to the following reaction, how many grams of carbon tetrachloride will be formed upon the complete reaction of 27.7 gr
    5·1 answer
  • you dropped a hot, heated metal into the water. after the metal was dropped, the temperature of the water?
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!