Answer:
Distillation
Explanation:
The method of distillation can be used to separate the two liquids, if their boiling point is known. The liquid with lower boiling point will be evaporated and its vapours will be captured, while the liquid with higher boiling point will remail in the container in the liquid state.
The process that could be used to separate the two liquids is heating the liquids and letting one boil away first. The correct option is A.
What is liquid?The liquid is one of the states of matter. The liquid has molecules that are nearer than gas. The liquid does not have a specific shape and size. They acquire the shape of the container in which they are poured.
When the liquid is boiling and the molecules of the liquid convert into vapor. The molecules of liquid go far away from each other. When the temperature increased, boiling happened. The process will be heating the liquids and letting one boil away first.
Thus, the correct option is A. heating the liquids and letting one boil away first.
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The question is incomplete. Your most probably complete question is given below:
heating the liquids and letting one boil away first
passing the liquids through a filter to collect one of them
collecting one of the liquids with a spoon
waiting for the two liquids to separate
a student wants to test the effect of different amounts of caffeine of different amounts of caffeine on the heart rate of daphnia, a small crustacean. What is the dependent variable?
The dependent variable is the heart rate of daphnia, a small crustacean.
WHAT IS INDEPENDENT AND DEPENDENT VARIABLES?
In an experiment, two variables are important. These two variables are the independent variable and dependent variable.
The independent variable is the variable that the experimenter alters or changes in order to bring about a change. On the other hand, the dependent variable is the variable that the experimenter measures or records in response to a change in the independent variable. In this question, a student wants to test the effect of different amounts of caffeine on the heart rate of daphnia, a small crustacean. The student will change the amount of caffeine, making it the INDEPENDENT VARIABLE while the heart rate of the small crustacean will be measured, making it the DEPENDENT VARIABLE.Therefore, the dependent variable is the heart rate of daphnia, a small crustacean.
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A central atom has two lone pairs on opposite sides and four single bonds. What is the molecule geometry of the result?
The molecular geometry is square planar.
According to the Valence Shell Electron Pair Repulsion theory (VSEPR), the shape of a molecule is determined by the number of valence electrons surrounding the outermost shell of the central atom in the molecule.
In this case, the expected geometry based on VSEPR theory is octahedral. However, the lone pairs on opposite sides of the four single bonds leads to a square planar molecular geometry.
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Define the following terms:
-hypothesis:
- theroy:
-law:
Answer:
hypothesis = A tentative explanation for a question, testable through experiments.
theory = An explanation supported by many experiments, answers "why".
law = A relationship in nature supported by many experiments.
Explanation:
How many grams are there in 6 moles of water, full working out?
1 mole of water = 18g
6 moles of water = 18×6 = 108 g
.. When water boils, you can see bubbles rising to the surface of
the water. Of what are these bubbles made?
a. air
b. hydrogen and oxygen gas
c. oxygen gas
d. water vapor
e. carbon dioxide gas
Answer:
Explanation:
It's water vapor. There is enough heat present to get the water to boil but not enough to break it into its chemical components (oxygen and hydrogen), so the answer is D.
Chemical bond meant by.... what?
Answer:
Chemical bonding, any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world.
Answer:
A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing, as well as exchanging, of electrons -or electrostatic forces.
Sterling silver is a mixture of the metals silver and copper.It is used to make jewellery.sometimes sterling silver causes green staining on skin.Which metal do you think is responsible for this?Explain why.
The composition of 925 Sterling Silver lends itself to the occasional green discoloration because of the presence of copper
does nail polish remover sink or float
nail polish remover float
Answer:
it will float on water
explanation:
Geekette hypothesized that since it floated on the water, like ice does, it must be less dense. ... According to Ken Johnsen, who lists his expertise in chemistry, the components of nail polish indeed make it less dense than water
ILL BRAINLIST!!
What would happen to the number of aphids if the number of ladybirds suddenly increased??
Answer:
decrease
Explanation:
ladybirds eat aphids so more ladybirds = more aphids eaten = less aphids
Describe what happens to the arrangement and movement of particles when a substance boils.
Answer:
When boiling a substance, the particles obtain more kinetic and potential energy from the heat being delivered. The kinetic energy means that the particles starts moving more intensely, and the potential energy means that the particles start to move away further from each other, which means the substance expands in volume.
Explanation:
When a liquid is heated, the particles gain energy and begin to move faster and faster, expanding the liquid. As the liquid warms, the most energetic particles at the surface escape as vapor from the surface.
What are particles?A particle is a small localized object to which several physical or chemical properties, such as volume, density, or mass, can be assigned in the physical sciences.
Atoms are small units of matter that contain a number of particles known as subatomic particles. The term particle, on the other hand, refers to any small object.
As a result, the primary distinction between atoms and particles is that atoms are small units composed of multiple particles, whereas particles are minute portions of matter.
When a fluid is subjected to heat, the particles acquire energy and start moving extremely fast, causing the liquid to expand.
The much more energetic particles at the exterior getaway as vapor phase from the surface as the liquid warms.
Thus, the arrangement and movement of the particles gets disturbed when a substance is boiled, and it gets escaped as vapor.
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Which is a characteristic of the part of the atom marked “A”?
•it contains most of the mass
•it is negatively charged
•it is mostly empty space
•it is composed of electrons
Answer:
it contains most of the mass
Nén một hỗn hợp khí gồm 3,0 mol nitơ và 7,0 mol hiđro trong một bình kín, phản ứng có sẵn chất xúc tác thích hợp và nhiệt độ của bình được giữ không đổi ở 450oC. Sau phản ứng thu được 8 mol một hỗn hợp khí.
(a) Tính hiệu suất phản ứng tổng hợp NH3.
(b) Tính thể tích khí amoniac được tạo thành (ở đktc)
What is the freezing point, in °C,
of a 1.56 m aqueous solution
of K3PO4?
Note: K for water is 1.86 °C/m
Enter rounded answer to three decimal points.
Answer:
1,380 °C hope this is the right answer
[tex]\boxed{\sf \Delta T_f=K_fm\times i}[/tex]
i is vant of factorFor K_3 PO_4
It shall release 3K+ and PO_4- ions
So vant Hoff factor is 4Now
[tex]\\ \rm\Rrightarrow \Delta T_f=1.56(4)(1.86)[/tex]
[tex]\\ \rm\Rrightarrow \Delta T_f=11.6°C[/tex]
It can be freezed easily at room temperature in UK or Siberia
After using soap to wash dishes by hand, it is sometimes difficult to keep your hands from remaining slick. Explain why rinsing your hands in lemon juice would make them less slick.
Answer:
Explanation: Rinsing hands in lemon juice would make them less slick because when a acid (soap) and a alkaline (lemon juice) reacts it becomes neutral
What are the two key ingredeints that help science move forward?
Answer:
science needs both ideas the hypothesis and facts the quantitative results to move forward
Explanation:
the two primary features of a scientific hypothesis are falsifiability and testability which are reflected in an If…then statement summarizing the idea and in the ability to be supported or refuted through observation and experimentation
Could someone plz help me? :(
Answer:
I think it's B " Constraints are more important than criteria ".
Each of the following can be used to make observations, except: *
A calculator
A digital scale
Your sense of smell
A microscope
Answer:
Calculator
Explanation:
A calculator is used to make, well calculations
You can use a scale to get information about the weight of an object, and you can observe how weight changes in relation to size etc.
For obvious reasons, you can observe different scents
Again a microscope is an observational tool
Explain why a car engine is called an ʻinternal combustionʼ engine?
Answer:
They are named as such because the fuel is ignited in order to do work inside the engine. ... The same fuel and air mixture is then emitted as exhaust. This can be done using a piston (called a reciprocating engine), or with a turbine.
Jerod used a golf club to hit a ball what was the action and reaction
Answer: I'm pretty sure the action is Jerod swinging the golf club and the reaction is hitting the ball
Explanation:
PLEASE HELP
1. What qualities do you think are important for a scientist to have? Give an
example of how one of these qualities is shown in your own approach to your
schoolwork. Answer in two to three paragraphs. (10 points) Think about what a
scientist does in order to obtain reliable information. Do you do any of these
things?
Answer:
I think some important qualities for a scientist to have is to be hard working, clever, and be able to manage your time and projects well. When you’re a scientist, you are going to be in a lab or in the field a lot. You need to be clever to carefully write down things that are important and interesting. You're also going to have to be hard working as well because as a scientist, it is important to work hard and get sound results.
I think one of the qualities that shows in my schoolwork is hard work. I always do my best on my assignments. I constantly work to get ahead and finish my work on time. The harder I work, the less work I have to do. Since I keep myself busy, I make myself less busy.
Explanation:
yep
What are three ways soil can be sustained?
Answer:
Increasing soil protection by crop residues and plants; adding organic matter to the soil through crop rotations, manures, or crop residues; and careful management of fertilizers, pesticides, tillage equipment, and other elements of the farming system can improve soil quality.
Hot glassware has a red glow to it
O True
O False
Answer:
false it has a green glow to it
a molecule of an element is called what?
Answer:
a molecule of an element is called atomicity
How many parents are needed to produce a baby tiger?
Answer:
Only 2
Explanation:
Which statement is true about a triple beam balance and spring scale?(1 point)
A.Both a triple beam balance and a spring scale are used to measure the mass of an object.
B.Both a triple beam balance and a spring scale are used to measure the mass of an object.
C.A triple beam balance is used to measure the weight of an object, and a spring scale is used to measure the mass of an object.
D.A triple beam balance is used to measure the weight of an object, and a spring scale is used to measure the mass of an object.
Answer:
D. A triple beam balance is used to measure the weight of an object, and a spring scale is used to measure the mass of an object.
Explanation:
:)
Answer: The right answer is C!
Explanation: This is 100% right hope its helps! :-D
Conversion of gaseous nitrogen to liquid nitrogen is an
example of a chemical change.
TRUE
FALSE
Answer:
true
Explanation:
you can't change it back, it's chemically changed
A chemist is conducting an experiment on a system. At the beginning of the experiment a chemist wants to determine the temperature of the system the system has a definite volume but no definite shape which of the following is most likely also true for the system?
A.The molecules in the system has less kinetic energy than a solid
B. The molecules in the system have more kinetic energy than solid
C. The molecules are held together by stronger attractive forces than a solid
D. Heat flow into the system eventually cause it to have a definite shape
The statement that is true about the system is; " The molecules in the system have more kinetic energy than solid".
There are three states of matter
SolidLiquidGasThe difference between these states of matter lies in the magnitude of intermolecular interaction between particles as well as the kinetic energy of the particles of the substance.
Solid particles have the strongest intermolecular interaction hence they have the lowest kinetic energy.
The magnitude of intermolecular interaction is weaker in liquids than in solids therefore liquid particles have greater kinetic energy than solid particles.
Lastly, gas particles have the greatest kinetic energy because intermolecular forces between them is almost negligible.
Liquids have volume but no definite shape. The description in the question must refer to a liquid system.
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Answer:
The molecules in the system have more kinetic energy than a solid.
Explanation:
Just did test
Enzymes are catalysts that affect biological reactions. How do enzymes
change the rates of reactions in the body?
A. Enzymes increase reaction rates by lowering the activation energy.
B. Enzymes decrease reaction rates by lowering the activation
energy
C. Enzymes decrease reaction rates by decreasing the energy of the
products.
D. Enzymes increase reaction rates by increasing the energy of the
reactants.
A substance has a density of 3.89 g/mL. Determine the volume, if the mass is 2.58 g.
The density of a substance can be defined as the mass of the subtance per unit volume of the substance. Mathematically, the density of a substance can be expressed as:
[tex]Density = \frac{Mass}{Volume }[/tex]
With the above information in mind, we can obtain the volume of the substance given in the question above as illustrated below:
Density = 3.89 g/mL
Mass = 2.58 g
Volume =?[tex]Density = \frac{Mass}{Volume} \\\\3.89 = \frac{2.58}{Volume }[/tex]
Cross multiply
3.89 × Volume = 2.58
Divide both side by 3.89
[tex]Volume = \frac{2.58}{3.89}\\\\[/tex]
Volume = 0.66 mLTherefore, the volume of the substance is 0.66 mL
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based on the particle model of matter, which statement below is NOT correct?
A. All matter is made of tiny particles
B. Removing energy causes particles of matter to move faster.
C. Particles of matter are aways moving.
D. Particles of matter have spaces between them.
Answer: C
Explanation: I believe it's C because I know A, B, and D are 100% correct
and if you look at solids, there pact together, pact together mean it cant move.
