Answer:
compound
Explanation:
(it comes from a living animal and is not mixed with things)
Cần bao nhiêu gam KMnO4 và bao nhiêu mililit dung dịch axit clohiddric 1M để điều chế đủ khí clo tác dụng với sắt , tạo nên 16,25 G FeCl3
Answer:
I don't know what you're saying cuz give me the brainless answer please
The crystal size of an igneous rock is described as its _____.
Explanation:
The crystal size of an igneous rock is described as it's texture
The following liquids are poured into a glass jar. Which is in the correct order, from top to bottom, how the liquids would form based on density? *
Answer:thing chang into different thing
Explanation:
Hydrogen and nitrogen combine to form ammonia. When nitrogen and hydrogen bond, nitrogen pulls the electrons from hydrogen toward itself. Which statement about the reactants is correct?
A)Hydrogen is oxidized, and nitrogen loses electrons.
B)Hydrogen gains electrons, and nitrogen is reduced.
C)Hydrogen is reduced, and nitrogen is oxidized.
D)Hydrogen is oxidized, and nitrogen is reduced.
The correct option s D.
Because from the reaction of hydrogen and nitrogen to form ammonia, Hydrogen is oxidized, nitrogen is reduced.
Therefore, Nitrogen gas is the oxidizing agent and hydrogen gas is the reducing agent.
This is called a redox reaction
Redox reaction is a chemical reaction in which electrons can move from one atom to another leading to change of oxidation states.
In this reaction nitrogen gas act as an oxidizing agent and hydrogen gas actsas a reducing agent.
N2+3H2 = 2NH3
(g). (g)
From the reaction, oxidation number of nitrogen is 0 on the reactants' side to
3.
The decrease in the oxidation number of nitrogen indicate that it is being reduced.
On the other hand, the oxidation number of hydrogen move from on the reactants' side to +1 on the products' side. This increase in the oxidation number of hydrogen indicate that hydrogen is oxidized.
Therefore, nitrogen gas is reduced to ammonia and hydrogen gas is oxidized to ammonia
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Which is most likely part of a healthy heart and lung system?
A. daily exercise
B. carbohydrate-rich diet
C. maintaining a high body mass index
D. diet low in vegetables and lean proteins
please help!!!
The sky is blue because blue light is scattered in the sky. What does
scattering mean?
A. dust particles are refracting light
B. dust particles are absorbing light
C. dust particles are transmitting light
D. dust particles are reflecting light
B. dust particles are absorbing light
Explanation:When light travels through a medium, it interacts with the medium and this causes the scattering of light. - Photons are absorbed by molecules in the medium, and this causes the molecules to vibrate and then re-emit the photons. ... - The scattering of light increases with frequency
Answer:
C
Explanation:
the answer is C. dust particels are reflecting light. hope this helps
Choose the best description that matches the following equation:
2K3PO4 + 3MgSO4 --> Mg3(PO4)2 + 3K2SO4
a) Redox, decomposition
b) Non-redox, synthesis
c) Redox, single displacement
d) Non-redox, double displacement
e) Redox, combustion
Answer:
Non-redox, double displacement
Explanation:
it's the only answer that have double displacement
tell me if it was right
3. Explain how the body uses electrolytes to regulate fluid balance. Describe Acid-base balance in the body.
Answer:
Explanation:
1 Electrolytes, particularly sodium, help maintain fluid balance through osmosis. Osmosis is a process where water moves through the wall of a cell membrane from a dilute solution (more water and fewer electrolytes) toward a more concentrated solution (less water and more electrolytes).
2 acid base balance in the body
our body's pH balance, also referred to as its acid-base balance, is the level of acids and bases in your blood at which your body functions best. The human body is built to naturally maintain a healthy balance of acidity and alkalinity. The lungs and kidneys play a key role in this process.
Your private gas collection consists of the four following gases, with each gas in a separate container, and exactly 1.0 g of each gas: CO2(g). Ne (g), Cl2
(g), and H2S (g). Which of your prized gases occupies the smallest volume at standard temperature and pressure (STP)?
H2S (g)
CO2 (g)
Cl2 (g)
Ne (g)
Answer:Cl2
Explanation:each gas is 1 gm and has the same P andT. The gas with the highest molar mass will have the lowest volume with least moles. Cl2 wins the prize
PLEASE HELP ASAPPPPPPPPPP
Answer:
c
Explanation:
Answer:
I think the first one
Explanation:
I think because it is going from 600 to 400 it is decreasing
PLEASE HELP: Can't figure this out!
-The substance is a liquid at room temperature.
-When you dissolve it into water, it doesn't conduct electricity.
-The substance boils at 45 oC.
Which is the most likely bond type for this substance?
Choices:
Covalent bond
Metallic bond
Ionic bond
Hydrogen bonding
Cation-pi bond
Answer:
Covalent bond
Explanation:
All the characteristics of a Covalent bond are being described.
When, a substance boils at 45degree C. Then, the most likely bond type for the given substance is a covalent bond. Option A is correct.
Liquid at Room Temperature: The fact that the substance is a liquid at room temperature suggests that the intermolecular forces holding its molecules together are relatively weak. Covalent compounds often have weaker intermolecular forces compared to ionic or metallic compounds.
Doesn't Conduct Electricity When Dissolved in Water: Covalent compounds, in general, do not conduct electricity when dissolved in water. This is because they do not dissociate into ions in solution, which is necessary for electrical conductivity. Ionic compounds, on the other hand, typically dissociate into ions and can conduct electricity in solution.
Boils at 45°C: The relatively low boiling point (45°C) indicates that the intermolecular forces in the substance are weak. Covalent compounds tend to have lower boiling points compared to ionic or metallic compounds, which often have stronger bonding.
Considering these factors, the substance is likely held together by covalent bonds, which involve the sharing of electrons between atoms. This allows for the formation of discrete molecules with weak forces between them.
Hence, A. is the correct option.
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--The given question is incomplete, the complete question is
"The substance is a liquid at room temperature.-When you dissolve it into water, it doesn't conduct electricity.-The substance boils at 45 oC. Which is the most likely bond type for this substance? Choices: A) Covalent bond B) Metallic bond C) Ionic bond D) Hydrogen bonding E) Cation-pi bond."--
does SO3 2- show delocalized bonding
Answer:
YES
Explanation:
SO3 2-DOES show delocalized bonding
delocalized bonding occurs when there is a resonance structure and the electronic bonds are a delocalised "cloud" around the species
The resonance effect of the sulfite sructures ithe folowing link:
https://www.chemistryscl.com/general/lewis-resonance-structure-of-SO32-/index.php
Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. Therefore SO₃²⁻ show delocalized bonding.
What is Ions?Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.
Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state.
SO₃²⁻ show delocalized bonding as there is a resonance structure and the electronic bonds are a delocalized "cloud" around the species
Therefore SO₃²⁻ show delocalized bonding.
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Maintenance of............of the body such as temperature level, water content, pH and blood pressure to be in balanced and stable condition
N2(g) + 3H2(g) ⟶ 2NH3(g)
The equation above is the equation for the Haber process.
If 2.0 moles of nitrogen are available for a reaction, what amount of hydrogen represents the correct stoichiometric ratio?
Why must protein digesting enzymes be stored in the inactive form
Answer:
To shield the organs and glands from the enzymes' digestion, protein digesting enzymes are released in an inactive state. If they are discharged in an active state, they begin digesting the glands that transport them as well as the release site.
Explanation:
Which of the following examples from the story "The Dentist" uses direct characterization to tell you how Lemon
felt about dentists?
Answer: the second answer makes the most sense
Explanation:
Curt Lemon was tensing the weighters there. So he was playing fidgets and dogs. Lemon make the character mentally fearing and thus option B is correct.
What is the story dentist?This is a terrifying tale involving a man who is going to the dentist. He is dreadfully afraid of visiting the dentist because of the pain it would cause. Then, for him, things significantly worsen..
He notes that because he didn't know Curt Lemon well, mourning for him was challenging, but to avoid sounding sappy, he shares a quick Curt Lemon story.
The men are working in an operational region near the South China Sea in February. An Army dentist is flown in one day to examine the men's teeth. Curt Lemon is anxious as the platoon waits to be checked one by one.
Finally, he acknowledges that when in high school, he had some negative dental experiences. He claims that nobody should interfere with his teeth, and when he is called, he will decline to enter.
However, when the dentist summons him a little while later, Lemon gets up and enters the tent.Thus option B is correct.
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GAS LAW PROBLEMS:
1. A gas sample has an original volume of 680 ml when collected at 720 mm and 28°C. What will be the volume of the gas sample if the pressure increases to 820 mm and the temperature increases to 55°C?
2. A gas sample has an original volume of 580 ml when collected at 1.20 atm and 22°C. If a change is made in the gas pressure which causes the volume of the gas sample to become 1.45 liters at 40°C, what is the new pressure?
3. A gas sample has an original volume of 760 ml when collected at 700 mm and 40°C. If a change is made in the gas temperature which causes the volume of the gas sample to become 420 ml at 1.25 atm, what is the new temperature?
4. A gas sample containing 0.546 mole collected at 700 mm and 25°C. would occupy what volume?
5. A sample of CO2 gas which weighs 1.62 grams has a volume of 1.02 liters when collected at 20°C. What would be the pressure of the gas sa
Answer:
o
Explanation:
ucbsnwjxjzbsjxbjzbsnsjxbsbbsnxbbxbsnzjjsjzkzkkzkzkz
shshdbsussbbzishxbsbbxusbxhzjjxchinga subs sh is znsoa d bea s for the last time you know. tumamamsr rnnfnt I. NJ just bought new house but he got very very very big but just very kind just bought him just now just now but he has his house but he has his house in his house haha hriirnr is Enfield in his head ️ BF do feel free for me quebro Ayer dry do it for you to do feel like fun for ️ do feel like fun fun fun fun for the last time fun for the last time for free from my gf for free from the other side for from a fe has his house haha he has been busy hereditary so we are going through it and don't feel free can go jump yes very big lol that good in my head that ft in a good game from good get good good GG from a great gAA
Lead (II) nitrate is reacted with sodium chloride to form a precipitate. What volume (in mL) of 0.666 M lead (II) nitrate is required to react with 517 mL of 2.27 M sodium chloride solution
Answer:
Explanation:
lead 3 is correct!!!!!
1. What branch of chemistry is foundational to the other
areas of chemistry?
Answer:
Physical, Inorganic, Biochemistry, Analytical, and Organic
Physical chemistry deals with applying physics to the study of matter. It's also probably the most important branch. Inorganic chemistry deals with stuff that is chemically composed of elements other than carbon. The branch of Biochemistry concerns itself with living things. Analytical chemistry deals with analyzing and finding out what substances are present in a particular material and how much of each substance is present. Finally, organic chemistry deals with substances that are compounds of carbon.
Explanation:
-.
How were organisms in the locations pictured affected by the hurricane in volcanic eruption
What is the temperature (in K) of a sample of nitrogen with an root-
mean-square velocity of 597.0 m/s The universal gas constant,
R=8.3145 J/mol K.?
The Temperature of given nitrogen sample will be 401.3 K and can be calculated by formula of root mean square velocity.
Firstly we will determine the mass of a nitrogen molecule in kilograms:
Replace the variables and the constants in root-mean-square velocity equation, replacing Joules with equivalent kg m2s–2:
The formula for root mean square velocity is given by,
μrms= √3RT/m
where,
μrms is the root mean square velocity
R is the gas constant
T is the temperature
m= mass of nitrogen atom
μrms= √3× 8.314×T/ 0.028
597.0/T= √3× 8.314/ 0.028
T= 597.0/ √3× 8.314/0.028
√T= 597.0/ 29.8
T= 401 .3 K
The temperature of sample of nitrogen is 401.3 K.
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Question 1
Compound Y is thermally decomposed with carbon using the apparatus below.
Reaction tube
Compound Y
and carbon
1
Heat
Limewater
A brown solid is formed in the reaction tube and the limewater turns cloudy.
What is compound Y?
А
Copper (11) oxide
B
Calcium oxide
с
Magnesium oxide
D
Sodium oxide
A brown solid is formed in the reaction tube and the lime water turns cloudy. The compound Y is calcium hydroxide. Therefore, A is correct.
What is lime water ?The common name for a saturated aqueous calcium hydroxide solution is lime water. At room temperature, calcium oxide (Ca(OH)2) is only weakly soluble in water.
Saturated calcium hydroxide solution is sometimes known as lime water or milk of lime. Ca(OH)2 is its chemical formula. Instead of the fruit sense of lime, the name is based on the mineral sense of lime. Lime wash is the name given to lime water used as paint.
Slaked lime, often known as calcium hydroxide, is an inorganic substance having the chemical formula Ca(OH)2. When water is combined with quicklime (calcium oxide), a colorless crystal or white powder is created.
Thus, option A is correct.
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What forms of energy are emitted from stars? (Select all that apply.) invisible light chemical heat sound visible light
Answer:
electromagnetic radiation
Explanation:
heat sound and invisible light
What is the mass in grams of 0.0015 mol of aspirin (C9H8O4)
Answer:
116.1 g
Explanation:
Answer:
Answer is 0. 508grams I'm not sure if I'm right but it might be the answer.
15. Which of the following BEST describes weather?
Answer:
Explanation:
Which of the following best describes weather? day to day conditions of the atmosphere at a place in regards to heat, dryness, sunshine, wind, rain, etc. long-term conditions (30 or more years) of the atmosphere at a place in regards to heat, dryness, sunshine, wind, rain, etc.
Answer:
Weather is short term climate is long term.
Explanation:
A solution of the weak acid HA is prepared by dissolving 2.60 g of HA in 100.0 mL water. The solution is titrated, and the equivalence point is reached after 32.6 mL of 0.500 M NaOH is dispensed. Calculate the molar mass of HA.
Answer:
Dude! this is crazy but ill help
Explanation:
The answer is 76.4 milimeters
The molarity of the weak acid HA can be calculated from the volume and molarity of NaOH by which the number of moles of HA can be calculated. From the number of moles and a weight of 2.60 g, the obtained molar mass 159.50 g/mol
What is molarity?Molarity of of solution is the number of solutes per volume of solution in liters. In a titration, the product volume and molarity of the titrant is equal to the product of volume and molarity of the analyte.
The volume and molarity of NaOH is given 32.6 ml and 0.500 M. The molarity of 100 ml of weak acid HA is calculated as follows:
Molarity of HA = (32.6 ml × 0.500 M) /100 ml
= 0.163 M.
From the molarity the number of moles of HA can be calculated by multiplying molarity with volume in liter.
number of moles = molarity × volume
= 0.163 M × 0.1 L.
= 0.0163 moles.
It is given that the weight of HA is 2.60 g. Thus molar mass can find out by dividing the weight by number of moles.
molar mass of HA = 2.60 g/ 0.0163 moles
= 159.50 g/mol.
Hence, the molar mass of the weak acid HA is 159.50 g/mol.
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PLSS CAN ANYONE HELP ME..
Answer:
there is two mixture homogeneous and heterogeneous mixture
ok
I will give Brainliest please help. :(
The given equation represents a chemical reaction occurring in plants. Does this chemical equation show Conservation of Mass?
Answer:
Conservation of mass occur when your chemical equation is balanced.
So let's see if it is balanced:
6CO₂ + 6H₂O ------> C₆H₁₂O₆ + O₂
You need to have the same quantity of atoms of each element on the product side and reactant side.
Reactant side: 6CO₂ + 6H₂O
Product side: C₆H₁₂O₆ + O₂
A vapor volume of 1.17 L forms when a sample of liquid acetonitrile, CH3CN, absorbs 1.00 kJ of heat at its normal boiling point (81.6 °C and 1 atm). What is Hvap in kilojoules per mole of CH3CN?
The heat of vaporization of CH3CN is obtained from the question as 25 KJ/mol.
We can obtain the number of moles from;
PV = nRT
P = 1 atm
V = 1.17 L
n = ?
R = 0.082 atm LK-1mol-1
T = 81.6 °C + 273 = 354.6 K
n = PV/RT
Substituting values;
n = 1 atm × 1.17 L/0.082 atm LK-1mol-1 × 354.6 K
n = 0.04 moles
Using; q = n·ΔHv
q = Heat absorbed
n = number of moles
Hv = Heat of vaporization
ΔHv = q/n
ΔHv = 1.00 × 10^3/0.04
ΔHv = 25 KJ/mol
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Classify these half-reactions by typing in “O” for “oxidation half-reaction,” “R” for “reduction half- reaction,” and “N” for “neither.” Upper H upper C l right arrow upper m g upper C l subscript 2. Upper m g right arrow upper M g upper C l subscript 2 plus 2 e superscript minus. 2 upper H upper C l plus 2 e superscript minus right arrow upper H subscript 2.
The classification for the following half-reactions is:
"N": HCI → MgCl₂"O": Mg → MgCl₂ + 2 e⁻"R": 2 HCI + 2 e⁻ → H₂What is an oxidation-reduction reaction?An oxidation-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing electrons.
What are the half-reactions?There are 2 kinds of half-reactions.
Oxidation: An species loses electrons and its oxidation number increases.Reduction: An species gains electrons and its oxidation number decreases.Let's classify the following half-reactions.
HCI → MgCl₂Electrons are not exchanged and Cl, the element present on both sides, has the same oxidation number, -1. This is neither oxidation nor reduction.
Mg → MgCl₂ + 2 e⁻Mg loses 2 electrons and its oxidation number increases from 0 to +2. This is an oxidation half-reaction.
2 HCI + 2 e⁻ → H₂H gains 2 electrons and its oxidation number decreases from +1 to 0. This is a reduction half-reaction.
The classification for the following half-reactions is:
"N": HCI → MgCl₂"O": Mg → MgCl₂ + 2 e⁻"R": 2 HCI + 2 e⁻ → H₂The question is incomplete. I believe the complete question is as follows.
Use this oxidation-reduction reaction to answer questions about half-reactions:
Mg + 2 HCl → MgCl₂ + H₂
Classify these half-reactions by typing in "O" for "oxidation half-reaction," "R" for "reduction half-reaction," and "N" for "neither."
HCI → MgCl₂
Mg → MgCl₂ + 2 e⁻
2 HCI + 2 e⁻ → H₂
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Answer:
For those who need it, the answers are N, O, R
Explanation:
