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
Anastaziya [24]
2 years ago
13

A student conducts an experiment to determine how the addition of salt to water affects the density of the water. The student fi

lls 3 beakers with equal amounts of water. He then adds 1 cup of salt to the first beaker, 2 cups of salt to the second beaker and no salt to the third beaker. What is the dependent variable in the student's investigation?
1)The amount of salt in the water.

2)The temperature of the water.

3)The density of the water.

4)The ph of the water.
Chemistry
2 answers:
Alina [70]2 years ago
8 0
3) The density of the water depends on the amount of salt on the water, therefore it is the
dependent variable
raketka [301]2 years ago
3 0

Answer:

vyb tftrdf5rdv

Explanation:

ghyttg

You might be interested in
What is the break down of food into energy
AnnyKZ [126]

it is nutrients that's it


3 0
3 years ago
A student needs to prepare 100. mL of 0.612 M Cu(NO3)2 solution. What mass, in grams, of copper(II) nitrate should the student u
Temka [501]

Answer: 11.5 grams

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution

Molarity=\frac{n\times 1000}{V_s}

where,

Morality = 0.612 M

n= moles of solute  

V_s = volume of solution in ml = 100 ml

Now put all the given values in the formula of molarity, we get

0.612=\frac{n\times 1000}{100ml}

n=0.0612moles

Mass={\text {moles of solute }}{\times {\text {molar mass}}=0.0612moles\times 187.56g/mol=11.5g

Therefore, the mass of copper (II)nitrate required is 11.5 grams

3 0
3 years ago
It is necessary to have a 40% antifreeze solution in the radiator of a certain car. the radiator now has 70 liters of 20% soluti
Akimi4 [234]
The answer is : 17.5 liters drained and replaced by 17.5 liters of 100% solution. 
x = amount drained and replaced
(70-x) = remaining amount of 20% solution
<span>.20(70-x) + 1.00(x) = .40(70)
14 - .2x + 1x = 28
1x - .2x = 28 - 14
</span><span>.8x = 14
</span><span>x = 14/.8
x= 17,5 ( 17.5 liters drained and replaced by 17.5 liters of 100% solution)

</span>
6 0
3 years ago
Read 2 more answers
During which step of meiosis do the homologous chromosomes line up in the middle of the cell?
777dan777 [17]

Answer:

It is D

metaphase 1

Explanation:

in metaphase chromosome line up in the middle.

3 0
3 years ago
Is frictional force desirable?​
gavmur [86]

Answer: Friction is a force that resists relative motion between two surfaces in contact. Depending on the application, friction may be desirable or undesirable.

6 0
3 years ago
Other questions:
  • Which allele for human blood type is recessive?
    8·2 answers
  • Answers section 4.2 structure of the nuclear atom 1. a sulfur-32 atom contains 16 protons, 16 neutrons, and 16 electrons. what i
    10·1 answer
  • I will brainly <br> And 5 star rate
    14·2 answers
  • Hydrogen gas can be prepared in the laboratory by a sin- gle-displacement reaction in which solid zinc reacts with hydrochloric
    5·1 answer
  • A 1.0 kg ball is thrown into the air and initial velocity of 30 mi./s how high into the air did the ball travel
    8·1 answer
  • Identify two possible reasons for unemployment​
    5·2 answers
  • What is an Atomic Model
    11·1 answer
  • To prepare for a laboratory?
    13·1 answer
  • Calculate the new pressure if a 2300 mL of a gas at a pressure of 1.88 atm is allowed to contract to a volume of 2.21 L.
    10·1 answer
  • Write a<br> paragraph or two on electromagnetism.
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!