Answer:
srry
Explanation:
Answer:
Scientific theories are the results of many experiments and observations.
Explanation:
Sooo BBBBBBBBB
A scientific experiment must be
O inexpensive
O repeatable
O complicated
O hard to explain
ii) During burning, elements in the coal are
converted to compounds called ????
Answer:
Gasification refers to the conversion of coal to a mixture of gases, including carbon monoxide, hydrogen, methane, and other hydrocarbons, depending on the conditions involved.
Which choice best describes the properties of potassium (K), based on its position on the periodic table of elements?
A.
a nonreactive metal
B.
a highly reactive metal
C.
a nonreactive nonmetal
D.
a highly reactive nonmetal
Answer:
B
Explanation:
Metals are found on the left side of the table and nonmetals the right, (K) is on the very left column meaning it is highly reactive
The option which best describes the properties of potassium (K), based on its position on the periodic table of chemical elements is: B. a highly reactive metal.
Alkali metals can be defined as the monovalent chemical elements that are found in Group IA of the periodic table.
Generally, these group of chemical elements readily lose their single (one) valence electron to form ionic compounds with non-metals. Some examples of alkali metal are:
Lithium (L).Sodium (Na).Potassium (K).Potassium (K) being an alkali metal with a single (one) valence electron in its outermost shell is considered to be highly reactive with other chemical elements, especially halogens because of its position on the periodic table of chemical elements.
In conclusion, Potassium (K) is a highly reactive metal based on its position on the periodic table of chemical elements.
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Everything in the universe that we can detect is either matter or ___________.
Answer:
Everything in the universe that we can detect is either matter or energy.
Everything in the universe that we can detect is either matter or energy.
What is energy?Energy exists in the capacity of a physical system to do work. The common symbol for energy exists in the uppercase letter E. The standard unit stands for the joule, symbolized by J. One joule (1 J) exists as the energy resulting from the equivalent of one newton (1 N) of force operating over one meter (1 m) of displacement.
A matter is referred as a substance having a certain mass and can take up a certain volume in the space. For example pen, pencil, toothbrush, water, milk are matters as well as car, bus, bicycle is also a matter. So matter is considered as a living thing and a non-living thing.
Energy, is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other various forms.
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Which are characteristics of electromagnetic waves? Check all that apply.
travel in straight lines and can bounce off surfaces
travel through space at the speed of light
travel only through matter
travel only through space
can bend around objects
move by particles bumping into each other
move by the interaction between an electric field and a magnetic field
The characteristics of electromagnetic waves are that they travel in straight lines and can bounce off surfaces,travel through space at speed of light,can bend around objects,move by interaction between electric field and magnetic field.
What are electromagnetic waves?The electromagnetic radiation consists of waves made up of electromagnetic field which are capable of propogating through space and carry the radiant electromagnetic energy.
The radiation are composed of electromagnetic waves which are synchronized oscillations of electric and magnetic fields . They are created due to change which is periodic in electric as well as magnetic fields.
In vacuum ,all the electromagnetic waves travel at the same speed that is with the speed of air.The position of an electromagnetic wave in an electromagnetic spectrum is characterized by it's frequency or wavelength.They are emitted by electrically charged particles which undergo acceleration and subsequently interact with other charged particles.
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A reactive metal that burns with oxygen and makes a white bright light is?
sodium
iron
magnesium
copper
Answer:
it is magnesium hope it helps
Gaseous ethane will react with gaseous oxygen to produce gaseous carbon dioxide and gaseous water . Suppose 25. g of ethane is mixed with 122. g of oxygen. Calculate the maximum mass of carbon dioxide that could be produced by the chemical reaction. Round your answer to significant digits.
Answer:
73.48 g
Explanation:
The reaction that takes place is:
2C₂H₆ + 7O₂ → 4CO₂ + 6H₂OWe convert the given reactant masses to moles, using their respective molar masses:
25 g ethane ÷ 30 g/mol = 0.83 mol ethane122 g O₂ ÷ 32 g/mol = 3.81 mol O₂0.83 moles of ethane would react completely with (0.83*7/2) 2.9 moles of O₂. There are more O₂ moles than that, so O₂ is the reactant in excess and ethane is the limiting reactant.
We calculate the produced moles of CO₂ using the moles of the limiting reactant:
0.83 mol C₂H₆ * [tex]\frac{4molCO_2}{2molC_2H_6}[/tex] = 1.67 mol CO₂Finally we convert CO₂ moles to grams, using its molar mass:
1.67 mol CO₂ * 44 g/mol = 73.48 gcorrect name for PtO.
Answer:
It may stand for 'Paid Time Off'
Explanation:
I need more context but that's probably it.
Answer:
gracias
Explanation:
Why is it important to keep detailed records and notes about evidence and the crime scene
Answer:
It is important to record the crime scene in order to view how it was originally found so when items are removed, it can still be investigated and viewed.
Explanation:
) An organic chemistry lab book gives the following solubility data for oxalic acid 9.5g/100ml water 23.7g/100ml ethanol 16.9g/100ml ether (a) A 14CL student has 40 g of oxalic acid in 1000ml of water and wishes to extracted into an organic solvent for further experiments. Which solvent should the student use for the extraction
Answer:
Ethanol
Explanation:
Solvent extraction is the process in which a compound transfers from one solvent to another owing to the difference in solubility or distribution coefficient between these two solvents(Science Direct).
We have to remember that oxalic acid will be extracted better into a solvent in which it is more soluble. From the data given; oxalic acid is more soluble in ethanol than in ether.
This simply means that ethanol is a better solvent for extracting oxalic acid from water when compared to ether.
Someone answer this question by me
I'm giving 100 points for that question
https://brainly.com/question/21777272
If you don't want to get reported and want brainiest, answer the question and don't just spam some random things. I really need help with this that's why I'm giving so many points
Answer:
Uiiikjhb+2
Explanation:
I’m gonna swinggggggf
What force on Earth can affect the pull of gravity?
Objects with more mass have more gravity. Gravity also gets weaker with distance. So, the closer objects are to each other, the stronger their gravitational pull is. Earth's gravity comes from all its mass.
Answer:
the moon or the sun
Explanation:
10)
What is the function of phloem tissue in the plant transport system?
A)
It prepares food
B)
It transports food.
C)
It transports water.
D)
It provides support
Maleic anhydride reacts with ethylene glycol to produce an alkyd resin. Draw thestructure of the condensation polymer produced.
Answer:
The reaction gives, a linear unsaturated polyester.
Explanation:
Condensation reaction -
It refers to the type of reaction, where two reactants combine to give a single product, by the removal of any small molecule like, water, ammonia etc.
From the question,
Maleic anhydride reacts with ethylene glycol to give a linear unsaturated polyesters.
[tex]-CH_2CH_2OOCH=CHCOO-n[/tex]
The formula of the polyester is attached.
2. How do you find the density of a substance given its mass and volume? Write the equation.
Density =
Answer:Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.
Explanation:
A container of water and an equal-sized container of oil are heated at the same rate. After several minutes, the temperature of the oil has risen 20 degrees C, but the temperature of the water has only increases by 8 degrees C. What explains this?
Question 6 options:
Heat moves from the water to the oil.
It takes more energy to increase the temperature of water than to increase the temperature of oil
The water contains more atoms, so it has more thermal energy
More heat was added to the oil than to the water.
Answer: It takes more energy to increase the temperature of water than to increase the temperature of oil.
Explanation:
yes
20 point, pls help. A 5.50 mole sample of a gas has a volume of 2.50 L. What would the volume be if the amount increased to 11.0 moles?
At constant temperature and pressure, If the amount of gas increases to the given value, its volume also increases to 5L.
What is Avogadro's law?Avogadro's law states that "equal volumes of all gases, at the same temperature and pressure, have the same number of molecules."
It is expressed as;
V₁/n₁ = V₂/n₂
Given the data in the question;
Initial amount of gas n₁ = 5.50molesInitial volume v₁ = 2.50LFinal amount of gas n₂ = 11.0molesFinal volume v₂ = ?We substitute our values into the expression above.
V₁/n₁ = V₂/n₂
V₁n₂ = V₂n₁
V₂ = V₁n₂ / n₁
V₂ = (2.50L × 11.0moles) / 5.50moles
V₂ = 27.5molesL / 5.50moles
V₂ = 5L
Therefore, at constant temperature and pressure, If the amount of gas increases to the given value, its volume also increases to 5L.
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Y’all I need help I will give brainly!!! (Use the crisscross method to find the chemical formula for the ionic compound formed by magnesium “Mg” and phosphorus “p”)
A) Mg2P
B) Mg3P2
C) MgP
D) Mg2P3
Answer:
B
Explanation:
The chemical formula will be Mg[tex]_3[/tex]P[tex]_2[/tex]. Therefore, the correct option is option B among all the given options.
What is chemical formula?Using atomic symbols with numerical subscripts, a chemical equation is indeed a notation used by chemists to indicate the total amount and kind of atoms contained in some kind of a molecule. A written chemical equation is a straightforward illustration of an actual, three-dimensional molecule.
The precise atoms that make up a material are described in its chemical formula. The chemical equation, the molecular formula, as well as the structural formula are the three fundamental types of chemical formulas. The chemical formula will be Mg[tex]_3[/tex]P[tex]_2[/tex].
Therefore, the correct option is option B.
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Which atom is oxidized in the reaction of benzhydrol with bleach?
Answer:
Which atom is oxidized in the reaction of benzhydrol with bleach?
Explanation:
n this experiment, students will perform a simple oxidation reaction of a secondary
alcohol. Recall that Oxidation Is a Loss of electrons while Reduction Is a Gain of electrons (OIL
RIG). In order to apply this mnemonic, you must know the oxidation states of each atom within
the compound, with particular interest on carbon. Carbon can carry oxidation states ranging
from -4 to +4. A few examples are shown in Figure 1 below. It is also common for carbon to
carry an oxidation state of -3, -1, +1, and +3.
Figure 1. Examples of carbon’s oxidation levels.
You may have noticed that all of the compounds in Figure 1 are neutral and carbon has
zero formal charge in each example. The concept of oxidation state and formal charge are
similar with one important difference in the calculation. Both are calculated by taking the
difference between the valence electrons (from the periodic table) and the number of electrons
belonging to that atom within the molecule. For a given atom, the valence electrons will never
change but the electrons ‘belonging’ the atom in the molecule will vary depending on number of
lone pairs and attachments to more or less electronegative atoms. The important difference in
the calculation of oxidation states and formal charge is based on the following assignment of
bonding electrons (Figure 2). This is how the highlighted carbon in ethanol can have an
oxidation state of -1 but a formal charge of zero.
- Oxidation states assign bonding electrons to the more electronegative atom in a bond,
except when the two atoms are the same and the bonding electrons are split equally.
Answer:
so the reaction would probably would be a chemical reaction
"When benzophenone reduces to diphenylmethanol, leftover products include the CH2OH and NaBH3 species. The energetic CH2OH and NaBH3 quickly bond to give (CH2OH)H3B-Na+. This complex is the main second product of benzophenone reduction."
Reactant Ratios
"In life, four benzophenone molecules react with each BH4 complex. Since four benzophenone molecules each attract a hydrogen atom from the “BH4” hydrogen donor, four “CH2OH”s bond with each boron (B) atom. Realistically, the secondary product is (CH2OH)4B-Na+ and four diphenylmethanol molecules. Focusing on one benzophenone molecule at a time is helpful for explaining and understanding reaction steps."
i hope it helps
=>
9. ______________ Consists of the Sun and everything that orbits the Sun
10. ______________ A celestial body that orbits a star
11. ______________ The force that pulls all objects with mass toward one another
12. ______________ Located between the orbits of Mars and Jupiter
Answer:
9.solar system
10.comet
11.gravity
12.earth and saturn
A white light shined onto a green brick bricks science
Answer:what’s the question?
Explanation:
How many grams of hydrogen are produced when 125 g of iron reacts with 125 g of water?
3 Fe + 4H2O ---> Fe3O4 + 4H2
5.95g
13.89g
111.11g
119.10g
double displacement reaction - write the balanced conventional, total ionic and net ionic equations:
Ca I2 (aq) + K2 C2 O4 (aq) >
Answer:
See explanation.
Explanation:
Hello!
In this case, these three equations show how the molecule behaves in terms aqueous and solid species; thus, we first write balanced conventional equation:
[tex]Ca I_2 (aq) + K_2 C_2 O_4 (aq)\rightarrow CaC_2O_4(s)+2KI(aq)[/tex]
Whereas the solid product is CaC₂O₄ based off its low solubility. Next, we ionize the aqueous species to obtain the total ionic equation:
[tex]Ca^{2+} +2I^- + 2K^+ +(C_2 O_4)^{2-} \rightarrow CaC_2O_4(s)+2I^- + 2K^+[/tex]
Finally, we cancel out potassium and iodide ions as they are the spectator ions due to their presence at both reactants and products in order to obtain the net ionic equation:
[tex]Ca^{2+} (aq) +(C_2 O_4)^{2-}(aq) \rightarrow CaC_2O_4(s)[/tex]
Best regards!
1. Convert each of the following Celsius temperatures to Kelvin. a) 27°C b) 100°C c) 0°C
Answer:
a) 300K
b) 373K
c) 273K
Explanation:
to go from °C to K all you have to do is add 273.
HELP! WILL GIVE BRAINLIEST DUE SOON
Dome Mountains are formed when:
A: plateaus are eroded away
B: faults rub against each other
C: magma escapes from the crust
D: magma pushes up sedimentary rock
Answer:
I am not the best to answer this but I think it would be B
Explanation:
Please write a essay and pick one prompt and at least half a page long thank you!
1. What are the physical and chemical properties of metals? Describe the carrot sticks of each and what each means.
2. Explain the difference between chemical and physical changes. Give to real-world examples of each.
2-Methyl-2-pentanol can be made starting from two different ketone electrophiles using two different Grignard reagents: one from a lower molecular mass Grignard reagent and one from a higher molecular mass Grignard reagent. Provide the retrosynthetic analysis for both routes using bromine as the halogen.
Answer:
Explanation:
In this case, we can do this by thinking a little.
Both ways use a grignard reagent, the difference between both ways is that one use an electrophile ketone with a low molecular mass, and the other has a high molecular mass.
The grignard reagent is commonly used to reduce carbonyle groups to alcohols. In the first step, a complex with the reagent is formed in the carbonile, and in the second step, the oxygen atom is hidrated in acid or basic medium and form the respective alcohol.
For the first way, we will use a high molecular mass ketone. In this case the 2-pentanone reacting with CH₃MgBr as a grignard reagent.
For the second way, we will use a low molecular mass ketone, in this case Acetone, reacting with CH₃CH₂CH₂MgBr. Both of them, will give the same product of 2 methyl-2-pentanol. See picture below for that
Hope this helps
14.) Analyze: What pattern do you see?
What happens to matter when it’s burned?well mayb its distroying the matter
What is the number of neurons in silicon
Answer:
14
Explanation:
i just know lol
........