What does it mean for a hypothesis to be testable? APEX
Answer:
A Scientific hypothesis must be testable, for a hypothesis to be testable means that it is possible to make observations that agree or disagree with it. This statement may or may not be true, but it is not a scientific hypothesis. That's because it can't be tested.
Explanation:
Does the size of a substance affect its properties?
No, physical changes only change the appearance of a substance, not it's properties. So growing larger doesn't change it's chemical composition.
(Please help!)
Which mixture below could be separated by distillation only?
Oacetone dissolved in water
O a pepperoni pizza
O pure water
O hydrogen
What makes a question testable? Can someone help me on this pls it has to be either a 4-5 sentence! this is a science question.
Answer:
testable questions are answer through observation or an experiment that provides evidence that the questions connects to the scientific concepts rather the opinion feelings
therefore the question can be tested through observation or experiment
what ions are produced when salt is dissolved in water
Answer:
Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together. After the salt compounds are pulled apart, the sodium and chloride atoms are surrounded by water molecules, as this diagram shows. Once this happens, the salt is dissolved, resulting in a homogeneous solution.
Explanation:
Answer:
Sodium and chloride is porduced
Explanation:
Water molecules pull the sodium and chloride ions apart, breaking the ionic bond that held them together. After the salt compounds are pulled apart, the sodium and chloride atoms are surrounded by water molecules, as this diagram shows. Once this happens, the salt is dissolved, resulting in a homogeneous solution.
Determine the volume of fluid in the graduated cylinder 12.8ml 12.7ml 12.78ml 12.88
Answer:
the volume is 12.79ml
Explanation:
12.8+12.7+12.78+12.88=51.16
51.16/4
=12.79
which of these is a chemical property of a substance
Find the product for each of the following and write your answer in proper scientific notation.
a. 37,000 x 7,000 =
Answer:
Ummm haven't learneed it yet
Explanation:
Who can describe for me the process obtaining oil from groundnuts
Your ans is here
I hope it will helpful for you
mark as brainest answer
thank you
In any pure sample of CO2, the ratio of the mass of carbon to the mass of
oxygen is always the same. You can justify this ratio by the fact that
compounds are composed of which of the following?
A. Identical molecules created from atoms combined in whole
number ratios
B. Atoms whose chemical properties do not change during a
chemical reaction
O C. Atoms whose masses do not change during a chemical reaction
D. Different molecules which together produce the observed
elemental ratios
Answer:A
Explanation:por q si bb
Identical molecules created from atoms combined in whole number ratios this is the best justification for In any pure sample of CO2, the ratio of the mass of carbon to the mass of oxygen is always the same.
What ratio of Mass of Oxygen and Carbon?Consider the elements carbon and oxygen. Combined in one way, they form the familiar compound carbon dioxide. In every sample of carbon dioxide, there are 32.0g of oxygen present for every 12.0g of carbon. By dividing 32.0 by 12.0, this simplifies to a mass ratio of oxygen to carbon of 2.66 to 1.Carbon has an atomic weight of 12, oxygen in diatomic form(O2) of 32 and CO2 of 44. This means that the mass of 6x1023 atoms of CARBON has a mass of 6 kilograms, the mass of 6x1023 diatomic oxygen molecules is 32 kg, and for CO2 it is 44kg. So carbon is the lightest and CO2 the heaviest.Identical molecules created from atoms combined in whole number ratios this is the best justification for In any pure sample of CO2, the ratio of the mass of carbon to the mass of oxygen is always the same.
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Science:What does feCI2 answer from the periodic table? need answer asap!!
Answer:
magnesium chlorine ×2 otherwise is this physics or general science
Which prototype is the most cost- and time-effective solution? The Rockets First company needs to hire an engineer to develop a prototype rocket. The company asks several engineers to provide a cost and time estimate for creating a prototype. Each bid is shown in the table. O Fast Flight Prototype Total Name Cost in Millions Months to Build O Higher Flyers O Orbit or Bust O Infinity & Beyond Fast Flight $400 24 Higher Flyers $500 34 Orbit or Bust $200 10 Infinity & Beyond $900 20 Submit Next Save and Exit Mark this and return
Answer:
Infinity & Beyond
Explanation:
hope I helped!
Answer:
Orbit or Bust
Explanation:
Shortest build time and least cost
What is Composed of more than one particle called ?
Answer:
I think the answer is Atoms.
1 Smurf = 3 Snorks
1 Snork = 6 Pookas
8 Pookas = 1 Flintstone1 Smurf = 3 Snorks
Answer:
all together you have 13
Explantation:
you have to add all them together
The clown, which your grandparents hire for your 18th birthday, is filling balloons with helium (He) to a volume of 2500 mL. If the density of helium (He) at room temperature is 0.0001785 g/mL, calculate the mass of the helium the clown is using.
Answer:
.45g
Explanation:
Do not forget to add the unit at the end, grams(g).
What determines whether an atom will form a chemical bond with another atom?
The electron arrangement of the outer energy level of an atom determines whether or not it will form chemical bonds. Or The shared electrons are typically near the middle of the bond between the 2 atoms, in a covalent bond.
Life science explores _____.
the nature of the earth and space
how living things interact with the earth
humans and their cultures
the structure of atoms and molecules
Answer:
the world
Explanation:
Answer:
The nature of the earth and space! From the smallest microbe to the largest mammal, Life Science explores the origins, evolution and expansion of life in all its forms. Explore a wide range of topics from biology to genetics and evolution.
Hope this helps!Which is a postulate of the kinetic-molecular theory?
O Gas particles have a small volume relative to the spaces between them.
Gas particles have a large volume relative to the spaces between them.
Gas particles are very small in size and always move slowly.
O Gas particles are very large in size and always move slowly.
Answer:
Gas particles have a small volume relative to the spaces between them.
Explanation:
i just took the quiz.
Gas particles have a small volume relative to the spaces between them is the postulate of the kinetic molecular theory.
What is kinetic molecular theory?The kinetic molecular theory describes about the behaviour of ideal gases at the particle level.
The five main postulates of the kinetic molecular theory are as follows:
1) The particles in a gas are in constant and random motion
2) The combined volume of the particles is negligible.
3) The particles exert no forces on one another.
4) The collisions between the particles are completely elastic.
5) The average kinetic energy of the particles are proportional to the temperature in kelvin.
Hence, we can conclude that option 1 is the answer.
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which is heavier Calcium (Ca) or Silicon (Si)
Answer:
Calcium is heavier a little bit
BRAILY I NEED HELP ASAPP
When an object has a definite
shape, how is it measured? Give an
example of an object and the tool
you would use to measure it.
Explanation:
Mass is the amount of matter in an object. Mass is measured in grams (1000 grams = 1 kilogram). 2. Solid- The particles of matter in a solid are tightly packed together and have a definite shape and take up a definite amount of space (volume).
for example and apple you can use a scale to find the mass. or a graduated cylinder to find the volume
Identify the control group and the independent and dependent variables in the following
scenario: 300 chickens are divided into three equal sized groups. Group A is injected weekly
with 10 mg of a growth hormone. Group B is injected weekly with 25 mg of the growth
hormone. Group C is not given any growth hormone. All 300 chickens are weighed after again
after 3 months.
The control group is II
The independent variable is
The dependent variable is
« Previous
Answer:
The controls group = group c
Independent variable = number of mg with respect of growth hormone
Dependent variable = Chicken growth
Explanation:
According to the given situation, the controls group represents the group C. The independent variable shows the number of mg of the hormone growth
And, the dependent variable depicts the growth of a chicken
Also, in the contract group, there is nothing for addition
And, the chicken growth would be depended upon the hormonal growth
How do you find the number of neutrons in an element
Answer: Atomic mass - Atomic number
Explanation:
To find the number of neutrons in an element, you want to subtract the atomic mass by the atomic number. The atomic number tells us the number of protons in the element. The atomic mass is the protons plus the neutrons. Therefore, you subtract the atomic mass and atomic number to cancel out the protons, leaving us with only neutrons.
What are protons explained simply
The Rydberg constant is 3.3 x 10 15 Hz. this value is also
Answer:
Rydberg constant 3.3 x 10¹⁵ Hertz is equal to 1.090 x 10⁷ m⁻¹
Explanation:
Given;
Rydberg constant as 3.3 x 10¹⁵ Hz
1 Rydberg constant = 3.3 x 10¹⁵ Hz
1 Rydberg constant = 1.090 x 10⁷ m⁻¹
Therefore, Rydberg constant 3.3 x 10¹⁵ Hertz is equal to 1.090 x 10⁷ m⁻¹
Here, we are required to identify another value for the Rydberg constant part from 3.3 × 10¹⁵Hz.
This value is also R = 1.1 × 10⁷.
The Rydberg constant, R is a constant relating to the electromagnetic spectra of an atom.
The value of Rydberg constant is 3.3 x 10¹⁵Hz above and is in terms of the Frequency of the spectra lines.
However, another way to express Rydberg constant is by dividing its value above by the speed of light, c to yield;
R = R'/c where c = speed of light = 3 × 10⁸m/s.This Rydberg value is also, R = (3.3 × 10¹⁵)/3×10⁸.
Therefore, this value is also R = 1.1 × 10⁷.
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What do you think the difference is between a personal characteristic and a physical description, when talking about people?
Answer:
I would say a physical characteristic is about what a person looks like, whereas a personal characteristic is how they act, and what theor personality is like.
Explanation:
Physical means something you can see or touch, like hair or skin. Personal is more often used for how someone's personality is, and you can't touch someone's personality.
The average time it takes to walk a mile is 0.33 hours. What is this time in
seconds?
Answer: 19.8 seconds
Explanation:
you're welcome:) <3 plz lmk if i'm wrong
9 x 10^3 + 2.3 x 10^4
Answer:
9 x 10^3 + 2.3 x 10^4
Scientific notation
3.2·10^4
Expanded form
32000
The following is a carbohydrates,lipid,protein or nucleic acid:Wax
A change in odor can also be a clue that a chemical change has occurred. Describe at least one situation in which you might be likely to detect such a change in odor in a kitchen.
Answer:
When you bake a cake the smell changes after it has been baked and it counts as a chemical change
Explanation:
What are the physical properties of a bowl of cereal?
Answer:
Physical and functional properties (gelatinization degree, bulk density, expansion ratio, water absorption index, water solubility index, and sensory characteristics (hardness, crispness, and bowl life) of cereal extrudates were determined.
