name two units for density? I need help!!!!
Answer:
Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth ’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in MKS or SI units). For example, the density of air is 1.2 kilograms per cubic metre.
Explanation:
Is carbon dioxide a polar molecule? Why or Why Not?
Explanation:
Carbon dioxide isn't a polar molecule because
same nature of charge appears in opposite direction which cancel each other. So, carbon dioxide is non-polar molecule.
Different microscopic organisms cause different
diseases. When a dangerous microscopic organismis
transferred from one person to many people the
disease it cames will spread
Why is this considered a theory instead of a hypothesis
or a law?
Answer/Explanation:
A theory has lots of scientific evidence to back it up. We know this to be true based on lots of different diseases and studies of their spread.
A hypothesis is more of a starting point - an educated guess based on limited evidence. It requires further testing before becoming a theory.
A law is something that can be generalized to lots of contexts, and is universal. Such as the law of thermodynamics.
Helppppp fast please will give brainliest
Answer:
9.32×10⁻³
Explanation:
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
. The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
How to add the number in scientific notation with same exponent.
7.21 ×10⁻³ + 2.11 ×10⁻³
exponent of both values are same thus we will take it common.
[7.21 + 2.11 ]×10⁻³
9.32×10⁻³
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Which elements form covalent bonds? Which other element is included in the group?
1. Calculate the number of moles in each of the following masses:
a. 64.1 g of aluminum ans: 2.38 mol Al show work
Answer:
2.38 mol of Al
Explanation:
To find the number of moles in a substance, you simply divide by the atomic mass. In this case, the conversion table would look as follows:
[tex]\frac{64.1 g}{1}[/tex] * [tex]\frac{1 mol}{26.98 g}[/tex]
The gram units cancel, and you are left with the answer of about 2.38 moles of Aluminum.
Ninety percent of plastic is made from the same stuff used to
manufacture:
Answer:
Polyethylene terephthalateHope this helps you Do mark as brainliest ✌️can you guys help me please? I dont get what im supposed to do here.
I NEED HELP ASAP!!
Scientific Inquiry
Science is the investigation of the ______________ ________________. Biology is the branch of science that studies ___________ _______________ and the environments they live in.
The Scientific Method
The scientific method is a __________________ used during a scientific ____________________ to answer a scientific question.
• Qualitative data is something that can’t be
________________ but can change over time.
Scientific inquiry can’t answer questions about a person’s beliefs, ethics, _________________, and feelings.
Which of these are questions that science can answer?
A. Was the flu vaccine more effective this year than last year?
B. Is it ethical to use stem cells in human research?
C. Does a drop in temperature affect the number of offspring that frogs produce?
D. Will people feel better if they eat organic produce instead of conventionally grown produce?
E. Are coffee drinkers worried about their heart disease risk?
Construct Hypotheses and Predictions
A hypothesis is a plausible __________________ for a particular fact. The hypothesis needs to be ____________________ or ____________________ based on collected evidence. All studies must have at least one hypothesis.
Answer:
Science is the investigation of the ______________ ________________. Biology is the branch of science that studies living organisms and the environments they live in.
The scientific method is a tool used during a scientific investigation to answer a scientific question.
• Qualitative data is something that can’t be
collected but can change over time.
Scientific inquiry can’t answer questions about a person’s beliefs, ethics, values, and feelings.
im going to say d
Construct Hypotheses and Predictions
A hypothesis is a plausible guess for a particular fact. The hypothesis needs to be supported or refuted (proven wrong) based on collected evidence. All studies must have at least one hypothesis.
Can somebody please help me with this ASAP!
Which of the models best represents CaCO3?
Answer: B
Explanation:
To solve this we must be knowing each and every concept related to CaCO[tex]_3[/tex]. Therefore, the correct option is option B among all the given options.
What is CaCO[tex]_3[/tex]?Carbonate of calcium One of the best-known compounds is CaCO[tex]_3[/tex]. Calcium carbonate is indeed a non-toxic, odorless substance. CaCO[tex]_3[/tex] is a white mineral found naturally in chalks, limestones, and marbles. It is a common material found in rocks as calcite and aragonite.
CaCO[tex]_3[/tex] is most commonly found in limestone. It is a sedimentary rock composed primarily of calcite and is the primary component of eggshells, snail shells, seashells, and pearls. Calcium carbonate is also used in medicine as a source of calcium or as an antacid. Although excessive calcium carbonate ingestion is dangerous and causes poor digestion.
Therefore, the correct option is option B.
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How many grams are in 1.98 x 1024 formula units of NaCl?
Answer:
There are 2027.52 formula units of NaCl
Explanation:
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what is action force?
Answer:
is force acting in one direction
Answer:
hope this helps!
as described by the third of Newton's law of motion of classical mechanics, offices occurs in pairs such that is one object exerts a force on another object, then the second object exerts an equal and opposite reaction Force on the first.
Which orbital indicated on the periodic table???
S
P
D
F
Help ASAP I’ll mark as brainlister:)
The mass of an atom Is found by adding Its protons and .The electric charge of an atom Is found by adding the charges carried by Its protons and .
Answer: the 1st answer is neutrons and i think the 2nd is nucleus
Explanation:
The mass of an atom is found by adding its protons and neutrons. The electric charge of an atom is found by adding the charges of its protons and electrons.
What is atomic mass?The atomic mass of an element is the total number of protons and the number of neutrons carried by one atom of that element. The atomic mass of an element is usually expressed in grams or a.m.u.
The atomic mass of an element = No. of protons + No. of neutrons
or
The atomic mass of an element = No. of electrons + No. of neutrons
The atomic number gives us information about how many protons are inside the nucleus of the atom. Elements are recognized by the number of protons in the nucleus. Neutrons are uncharged elementary or subatomic particles that are stable when bound in an atomic nucleus.
As the electrons and protons are charged particles in an atom, therefore, the sum of the charge carried by them is equal to the electrical charge of the atom.
For a neutral atom, the number of protons present in an atom is always equal to the number of electrons.
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Which is a characteristic of nuclear fission? releases nonradioactive waste only involves the collision of two nuclei releases small amounts of energy compared to fossil fuels involves the splitting of an atom into two or more fragments
Answer:
involves the splitting of an atom into two or more fragments
Explanation:
The characteristic of nuclear fission is that it involves the splitting of an atom into two or more fragments. Details about nuclear fission can be found below.
What is nuclear fission?Nuclear fission in radioactivity is a process by which the nucleus of a large atom splits into two or more smaller atoms.
Nuclear fission is usually accompanied by the release of a radioactive particle.
This suggests that the characteristic of nuclear fission is that it involves the splitting of an atom into two or more fragments.
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What do you call an idea or explanation that you test through study and experimentation?
what is the electron configuration for gallium
Answer:
[Ar] 3d^104s^24p^1
How many days does the waxing and waning phase of the moon last on average? *
Answer:
7.38 days.
Explanation:
Convert 49 lbs into grams
To get an approximate result, multiply the mass value by 454.
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⚠️⚠️ period and group PLEAAE CHECK OUT THE QUESTIONNS IMAGE ⚠️⚠️
Answer:
group 5, period 7
An element that is in the same period as nitrogen is _________
Group of answer choices
helium
neon
argon
sodium
Answer:
Neon
Explanation:
Chemical element Chemical series Electron configuration
3 . Li -Lithium Alkali metal [He] 2s1
4 . Be-Beryllium Alkaline earth metal [He] 2s2
5. B -Boron Metalloid [He] 2s2 2p1
6. C-Carbon Reactive nonmetal [He] 2s2 2p2
7 . N -Nitrogen Reactive nonmetal [He] 2s2 2p3
8. O-Oxygen Reactive nonmetal [He] 2s2 2p4
9. F -Fluorine Reactive nonmetal [He] 2s2 2p5
10. Ne-Neon Noble gas [He] 2s2 2p6
What mass of water freezes if 5.43 kJ oh heat are released in the process
Answer:
16.3 g
Explanation:
got it right on ck
A. Lithium and cadmium are in the mixture. Strontium is not in the mixture.B. Lithium and strontium are in the mixture. Cadmium is not in the mixture.C. Cadmium and strontium are in the mixture. Lithium is not in the mixture.D. All of the shown elements are present in the mixture.
Answer:
I think it's Sr and Li...
Explanation:
You just line up the elements to the mixture and whatever fits with all of the charts are the elements present in the mixture.
experimented with oil and water layers in 1917. He proposed that the
in the oils pointed away from the water
• A. Charles Overton, phosphate heads
. B. Irving Langmuir, fatty acid chains
• C. Hugh Davson, proteins
. D. Gregor Mendel, fatty acid chains
Answer:
Irving Langmuir, Fatty Acid Chains
Explanation:
The man that experimented with oil and water layers in 1917 and also proposed that the ________ in the oils pointed away from the water is:
B. Irving Langmuir, fatty acid chainsIrving Langmuir was an American scientist who was interested in the fields of Chemistry, Physics and Engineering. He won an award in Chemistry for his contributory research in surface chemistry.
He made an experiment with oil and water layers in the year 1917 and he made the claim that the fatty acid chains in oils always pointed away from tje water in which they were immersed in.
Therefore, the correct answer is option B
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which process do ribosomes perform
I am a common cation that is found in the alkali group. I am found in salt. I have a +1 charge. What am I?
Answer:sodium
Explanation:
Sodium
Which statement best explains how the passage fits
the realistic fiction genre?
Answer:
It seems believable and familiar.
Explanation:
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Which is a base unit used in the metric system?
Answer:
Quarts Litres Pints Degrees Fahrenheit.ASK for more
Answer:
d
Explanation:
Do you think that participation in a Supervised Agriculture Experience (SAE) prepares a student for a career in the AFN industry? Discuss why you agree or why you don’t. Discuss how your particular SAE has prepared you for your future career.
HELPPPP !! For horticulture
Answer:
The SAE curriculum includes practical farming tasks conducted outside the scheduled classroom and laboratory period by students. SAEs offer a method for students in agricultural education to gain real-world work opportunities that they are most interested in in the field of agriculture. Supervised agricultural experience is an essential component of agricultural education, and all Agriculture, Food and Natural Resources (AFNR) courses are a necessary component.
Explanation: Hope it helps