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
Maslowich
3 years ago
9

Someone help with this please

Chemistry
1 answer:
Tju [1.3M]3 years ago
3 0
To me I think if the number of snakes increased, the number of rabbits decreases. Hope u got it correct ; )
You might be interested in
How many molecules of carbon dioxide, CO2, are present in 388.1 grams?
swat32

Answer:

53.11× 10²³ molecules

Explanation:

Given data:

Number of molecules of CO₂ = ?

Mass of CO₂ = 388.1 g

Solution:

Formula:

Number of moles = mass/ molar mass

Molar mass of CO₂ = 12× 1 + 16×2

Molar mass of CO₂ = 44 g/mol

Now we will put the values in formula.

Number of moles = 388.1 g/ 44 g/mol

Number of moles = 8.82 moles

Now we will calculate the number of molecules by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

1 mole = 6.022 × 10²³ molecules

8.82 mol × 6.022 × 10²³ molecules / 1 mol

53.11× 10²³ molecules

6 0
3 years ago
True or False ... In a chemical change, a new<br> substance is formed.
nikitadnepr [17]
The answer is true the answer has to be 20 words long so true true true true true true
7 0
3 years ago
Is ninhydren test positive for protein?
lyudmila [28]
The Ninhydrin test is not effective to detect high molecular weight proteins as the steric hindrance limits the ninhydrin from reaching the α-amino groups.
5 0
2 years ago
Help, please X﹏X<br><br><br><br>- The picture in the right is after the water drained out -
lutik1710 [3]
There’s no picture in your question
6 0
2 years ago
Read 2 more answers
If we have three different solutions, A, B, and C, each containing 100 g of water, plus respectively 6.84 g of sucrose (C12H22O1
GenaCL600 [577]

Answer:

c. A and C have the same boiling point, but B has a lower one.

Explanation:

The freezing point depression is expressed as:

ΔT = kf×m

Where kf is the freezing point depression constant that depends the nature of the solvent and m is molality (mol of solute/kg of solvent)

Boiling point elevation is:

ΔT = kb×m

Where kb is the ebulloscopic constant of the solvent.

As kf, kb and mass of solvent is the same for A, B and C solutions the only difference will be in moles of solute.

<em>A </em>6,84g of sucrose are:

6,84g×\frac{1mol}{342,3g} = <em>0,002 moles</em>

<em>B </em>0,72g of ethanol are:

0,72g×\frac{1mol}{46,1g} = <em>0,0016 moles</em>

<em>C </em>0,40g of sodium hydroxide are:

0,40g×\frac{1mol}{40g} = <em>0,001 moles</em>

Using Van't Hoff factor that describes the number of moles in solution that comes from 1 mole of solute before dissolving, moles in solution for A, B and C are:

A. moles in solution: 0,02 moles×1 = <em>0,02 moles in solution</em>

B. moles in solution: 0,016 moles×1 = <em>0,016 moles in solution</em>

C. moles in solution: 0,01 moles×2 = <em>0,02 moles in solution</em>

As A has the same moles in solution of C, the freezing point depression will be the same in A and C, and the lower freezing point depression will be in B.

Also, the boiling point will be higher in A and C, and then in B.

Thus:

a. C has the lowest freezing point in the group.  <em>FALSE. </em>A and C have the lowest feezing point because have the higher freezing point depression.

b. A, B, and C all have different freezing points.  <em>FALSE. </em>As moles of A and C are the same, freezing point will be the same for the solutions.

c. A and C have the same boiling point, but B has a lower one.  <em>TRUE. </em>

d. The boiling point of C is lower than that of A or B . <em>FALSE. </em>Boiling point of C and A is higher than B.

e. A, B, and C will all have about the same freezing points. <em>FALSE</em>

7 0
3 years ago
Other questions:
  • what if you scored a 0.80 on a test what. fraction of the test in simplest form did you answer correctly
    12·2 answers
  • Which factors affect electronegativity?
    6·2 answers
  • The equation for one of the reactions in the process of turning iron ore into the metal is
    15·1 answer
  • why do these energy levels mean that the atom will show an emission spectrum of individual lines rather than a continuous spectr
    12·1 answer
  • How has the work of chemists advanced cancer treatment?​
    12·2 answers
  • Question 3 (1 point)
    5·1 answer
  • What are the advantages of using Fahrenheit ?
    9·2 answers
  • Someone please help me
    9·1 answer
  • Why do organisms eat food? Be sure to explain your answer. ​
    7·2 answers
  • The structure of an atom is
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!