Answer:
2 answer
A List of Chemistry Laboratory Apparatus
Safety goggles and safety equipment.
Beakers.
Erlenmeyer flasks, AKA conical flasks.
Florence flasks, AKA boiling flasks.
Test tubes, tongs, and racks.
Watch glasses.
Use the molecular formulas for Ethanol (C2H5OH), Oxygen (O2), Carbon Dioxide (CO2), Water (H2O), and the yield sign () to write a balanced chemical equation for the reaction:
To balance the equation we have to find a combination of coefficients for the species that make the number of each element on both sides of the equation equal.
C₂H₅OH + 3O₂ → 2CO₂ + 3H₂O
Checking to ensure the reactant and product sides of the equation are equal.
Reactants Products
C 2 2
H 6 6
O 7 7
The Lithium atom has only two energy levels. The third is empty. Therefore, we can refer to the second energy level of the lithium atom as the outermost level. The electrons in this outermost energy level are called valence electrons. Refer to the table you just constructed, and determine the number of valence electrons for the first 18 elements. Fill in the table with the identified number of valence electrons
Type the correct answer in each box. Use numerals instead of words.
Answer:
H=1
Li=1
Na=1
Be=2
Mg=2
B=3
Al=3
C=4
Si=4
N=5
P=5
O=6
S=6
F=7
Cl=7
Ne=8
Ar=8
He=8
Explanation:
Answer:
The person above me got one wrong
Explanation:
which of the following is not a characteristic of solution?
A. it is a uniform mixture
B. it will scatter a beam of light
C. it is stable over time
D. the solute and solvent cannot be destinguished by the naked eye
1
Which of the following is harmful to natural resources?
A pollution
B
conserving natural resources
C recycling
2. Write the charge of each sub-atomic particle in the helium atom above.
Explanation:
The charge of a helium atom is zero
It is neutral because
The number of unit negative charges = number of unit positive charges
One unit negative charge = -1.6 x 10^(-19) which is basically the charge of an electron
One unit positive charge = +1.6 x 10^(-19) which is basically the charge of a proton
A helium atom has 2 protons and 2 electrons, so it is neutral
NOTE: an alpha-particle (He2+) is a charged helium atom it has 2 protons and 0 electrons. Charge of an alpha particle = +3.2 x 10^(-19).
wich group was the control group? The experimental group?
Answer:looks spicy
Explanation:what are you asking
Imagine having to use brainly Couldn't be me.
nubs
nitrates, turbidity and acidity. Whichwater sample was likely runoff from a farm?
Answer:
What is the most likely source of nitrogen in runoff? Fossil fuel emissions.
Someone pls tell me the answer
Answer:
6 inches and that should be the answer
Cell structure escape room
Can someone help me with this?
Refer to the attachment
Have your mother and father (or any adult man and woman) sing together on the same note, at the same pitch (not an octave apart). Write down any differences you can hear. Is one voice lower or higher sounding (even though they are singing the same pitch)? Are there other differences you can hear? Explain your results using the terms “overtones,” “frequency,” “pitch,” and “sound quality.”
Answer:
No one sounds the same in singing everyone has a different pitch, overtones, and sound quality. Now in some songs people harmonize together and that can sound the same in pitch but there are still different pitches and tones.
HELP PLSSSS
In terms of their chemical properties (such as how they react with things), how do the elements in a group compare to the other elements in that group? For example, Sodium (Na) and Potassium (K) are both in the same group, what does this mean about their chemical properties?
Answer:
Groups like the Halogens, which include Chlorine and Flourine, share similar properties both behaviorally and structurally. The Periodic Table is essentially a bunch of patterns and trends and the groups (like the one with Sodium and Potassium) were grouped together because of these similarities.
Explanation:
https://en.wikipedia.org/wiki/Alkali_metal
When electrons are shared between atoms, a covalent bond is formed
True
False
Answer:
true
Explanation:
ionic transfer of e^- ions formed (charges)
ionic=non-metal+ metal
ex: F+Ca
covalent sharing e^- no true charges
covalent= non-metal+ non-metal
ex: F+P
( my notes)
which method would be best for separating the components of a mixture
Answer:
A
Explanation:
Evaporation It would become a crystal
Which of the following makes its own food using energy from the sun? *
Green algae
Tress
Sunflowers
Answer: All of the above
Explanation:
All of the options are producers, meaning they make their own food from sunlight through the process of photosynthesis.
which molecule is a common output of glycolysis, pyruvate oxidation, and the citric acid cycle?
Explanation:
Acetyl CoA links glycolysis and pyruvate oxidation with the citric acid cycle. In the presence of oxygen, acetyl CoA delivers its acetyl group to a four-carbon molecule, oxaloacetate, to form citrate, a six-carbon molecule with three carboxyl groups.
Acetyl Co-A is a common output of glycolysis, pyruvate oxidation and citric acid cycle.
How does acetyl co-A links glycolysis and citric acid cycle?Acetyl Co-A links glycolysis and pyruvate oxidation with the citric acid cycle as in presence of oxygen it delivers its acetyl group to four carbon molecule to form citrate a six carbon molecule with three carboxyl groups .
In the citric acid cycle, 2 carbons of acetyl group which were of acetyl Co-A are released in form of carbon dioxide a major product of cellular respiration. For each acetyl Co-A which enters citric acid cycle 2 carbon dioxide molecules are released.
The transition reaction is the conversion of 3-carbon pyruvate to 2- carbon acetyl co-A and 2 molecules of carbon dioxide.
Learn more about acetyl co-A here:
https://brainly.com/question/12885899
#SPJ2
What law does a balanced chemical equation demonstrate?
Answer:
The law of conservation of mass
Explanation:
A chemical equation is an expression of the net composition change associated with a chemical reaction. It shows how a certain amount of reactants yields a certain amount of products. Both of these amounts are measured in moles. Chemical equations often contain information about the state of the reactants: solid, liquid, gas, or aqueous. In addition, they always adhere to the law of conservation of mass, which holds that matter can change form, but cannot be created or destroyed.
bl Write a word equation for
the combustion of sulfur.
Example, when sulfur is burned in the air (one of my favorite chemical reactions) it combines with oxygen in the air to form an oxide. We consider this reaction in the form of a chemical equation: S (sulfur) + O2 (oxygen) |> SO2 (sulfur dioxide)
What is the difference between an aqueous solution and a liquid (simple definition)
Answer:
The primary distinction between liquid and aqueous is that liquid refers to any fluid that is almost incompressible, whereas aqueous refers to liquids that contain water as the solvent.
Explanation:
Which of the following compounds contains an ionic bond? *will give brainliest plus 15 points*
A. CCl4
B. CO2
C. KB
D. NHS
Answer:
C
Explanation:
ionic bonds are bonds between metals and non-metals or metalloids ,so the only compound with a metal is KB
What situations might you encounter?
Please it is for my assessment please could you give me 6 answer please
Read the description of each element, then write its name and symbol
A) This non-gaseous and reactive metal belongs to group 16
B) This element has an atomic number of 42
C) This metal has an atomic mass of about 56
D) This Group 2 metal is in the sixth period
E) This metal element is liquid at room temperature
F) This is the lightest element of the second period
G) This element has a valence electron and six electronic layers
H) This element has a mass number of 184
I) This element has seven valence electrons and is in the fifth period
J) This element has four electronic layers and its outer layer is full
Answer:
Diatomic carbon (systematically named dicarbon and 1λ2,2λ2-ethene), is a green, gaseous inorganic chemical with the chemical formula C=C (also written [C2] or C2). It is kinetically unstable at ambient temperature and pressure, being removed through autopolymerisation. It occurs in carbon vapor, for example in electric arcs; in comets, stellar atmospheres, and the interstellar medium; and in blue hydrocarbon flames.[1] Diatomic carbon is the second simplest form of carbon after atomic carbon, and is an intermediate participator in the genesis of fullerenes.
Explanation:
Is soap solution a strong, weak or non electrolyte
Answer:
Nonelectrolytes do not dissociate into ions in solution; nonelectrolyte solutions do not, therefore, conduct electricity. ... Strong and Weak Electrolytes.
Explanation:
NEED AN ANSWER FROM K12 MUST HAVE THE ANSWERS OR WILL GET REPORTED NO LINKS
How many laws of motion are there? (Newton's)
A. 3
B. 2
C. 1
D. 4
To which kinds of objects do Newton's laws of motion apply?
A. only objects rolling
B. only objects going down a hill
C. all objects
D. only objects flying
As a surfer is seen riding a wave toward the shoreline, what is the shoreline?
A. displacement reference
B. coordinate plane
C. Cartesian boundary
D. reference point
Which does not take the direction of the motion into account?
A. Distance
B. Displacement
C. velocity
Answer: A) 3 / C) all objects / D) reference point / C) velocity
Explanation: I did some research before answering, I hope this helps.
1. What allowed fusion reactions to take place in the early universe?
Answer:
Nuclear fusion in stars converts hydrogen into helium in all stars
Look closely at the remaining parts of the flower. Describe the structures you can see now that the petals are gone.
Anther
Filament
Pistil
Stalk
Answer:
Explanation:AntherFilamentPistilStalk
the bonding between sodium and chlorine, why is it that type of bounding? what it creates? what happens in water when you put sodium chloride in water?
I need it quickly and not copy-write.
Answer:
NaCl sodium chloride is an ionic salt. Also commonly known as table salt. When you put sodium chloride in water, the molecule dissolves in water because the covalent bonds of water (H2O) is stronger than the ionic bond of NaCl.
Explanation:
To be more specific, the two hydrogen (+) molecules are attracted to the chlorine due to its negative charge. The oxygen (2-) of the water is also attracted to the Na (+). Water eventually pulls Sodium Chloride apart (breaks ionic bond) and dissolves it.
please help!! i do NOT understand chemsitry at all
Answer:
pretty sure there is a calculator
Explanation:
there is a calculator for it ( that's what I do ) btw there is a calculator for every even science or chemistry
Summarize how C-14 and U-238 dating together can be used to determine fossil ages.
Answer:
Uranium 238 is only found in igneous or volcanic rocks. So no fossils can be dated directly using U 238.
Because of the huge differences in the half lives of Carbon 14 and Uranium238 they cannot be used together. Carbon 14 can only be used to date fossils of a very recent age. Uranium 238 can only be used to date volcanic rocks of a very old age.
Explanation:
I need help on this one too
Answer:
The answer option which best describes nuclear fission is: C. A nucleus collides with a neutron and splits, releasing energy.
A nuclear reaction can be defined as a type of reaction in which the nucleus of an atom is transformed by either being joined (fusion) or split (fission) with the nucleus of another atom of a radioactive element and accompanied by a release of energy.
Explanation: