Answer: 81.7 ml
Explanation:
1 cm^3 = 1 ml
Divide the total mass by it's density to find it's volume:
(52.4g/7.87g/ml) = 6.658 ml
Add to 75.0 ml to arrive at a final volume of 81.7 ml
A straight chain hydrocarbon with the formula C^3H^4 _____.
has a triple C-C bond
has a double C-C bond
is essentially inert
has two double C-C bonds
Answer:
has two double C-C bonds
Explanation:
A saturated compound is a compound having the full complement of hydrogen atoms for every carbon atom while an unsaturated compound does not contain the full complement of hydrogen atoms for every atom of carbon.
If we look at C3H4, the only possible structure of the compound is H2C=C=CH2. We can see from this arrangement that the compound contains a cumulative double bond. This is the specific structure that fits into one of the descriptions in the options, the compound contains two double bonds.
Question number 4..
Answer:
I think it's 7089 because that's my answer to your questions
For the set of ionic compounds, LiCl, AgCl, PbCl2, choose the correct characterization of their solubilities in water from the response list. Group of answer choices All three salts are soluble. None of the three salts are soluble. Two of the three salts are soluble. One of the three salts is soluble.
Answer:
Two of the three salts are soluble.
One of the three salts is soluble.
Explanation:
One or two of the three salts would be soluble in water depending on if the water is cold or hot.
According to the solubility rules of chloride salts, all chlorides are soluble in cold water except for those of silver (Ag), lead (Pb), and mercury (I) (Hg).
This thus means that both AgCl and [tex]PbCl_2[/tex] would be insoluble in cold water while LiCl would be soluble.
[tex]PbCl_2[/tex] is, however soluble in hot water.
Hence, in cold water, one of the three salts (LiCl) would be soluble, while in hot water, two of the three salts (LiCl and [tex]PbCl_2[/tex]) would be soluble.
Which bond type is found in ammonium chloride. Select one: a. metallic b. covalent c. ionic
Answer:
ionic
Explanation:
In NH4Cl molecule, ionic bond is formed between NH4+ and Cl– ions, 3 covalent bonds are formed between N and three H atoms and one coordinate bond is formed between N and 1 H atom.
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Answer:
[tex]\boxed{\sf c. \ ionic}[/tex]
Explanation:
NH₄Cl is formed by an ionic bond between NH₄⁺ and Cl⁻ ions.
NH₄Cl (solid) ⇒ NH4⁺ (aqueous) + Cl⁻ (aqueous)
Read ""the Ozone Hole"" and answer the question below list at least three scientific disciplines related to chemistry mentioned or alluded to in the article
Answer:
Any 3 of the following:
atmospheric science
environmental science
climate science
biology
astronomy
human physiology and medicine
Explanation:
Got it right on edge 23
An atom of nitrogen has seven electrons. Which diagram correctly represents the arrangement of these electrons?
ОА.
OB
1112
1s 11:28 1111
2p
1s 12
2p
1s 12
12s 2p
OD. 1111s 112s
112p
Ос.
Answer:
Option C.
Explanation:
The arrangement of electrons in their orbital follows certain rules.
The Hund's rule practically explained how electrons are distributed in their orbitals.
The Hund's rule states that electrons distributed among the orbitals of the same shell singly (without partner) before pairing occurs.
In the filling of these electrons in their orbitals, we fill in the electron without pairing first because electrons tends to repel each other before filling with the opposite spin as shown in the attached photo.
Lavoisier developed a new theory of combustion that overturned the phlogiston theory. What measurements were central to his theory, and what key discovery did he make?
Answer:
Lavoiser proposed a theory in charge of writing the combustion correctly, denying the phlogiston.
Lavoiser said that combustion is carried out in a medium where there is oxygen, giving as a product water and carbon dioxide.
This combustion results in the decrease in the volume of the material that burns.
Furthermore lavoiser discovered the importance of oxygen in animal respiration.
Explanation:
Lavoisier argued that if or if the presence of oxygen must be present, it is an irreversible and spontaneous process.
What orbits around the nucleus
Answer:
Electrons orbit the nucleus.
Answer:
electrons
Explanation:Atoms are made up of protons and neutrons located within the nucleus, with electrons in orbitals surrounding the nucleus.
The substances are placed in separate containers at room temperature, and each container is gradually cooled. Which of these substances will solidify before the temperature reaches 0°C? benzene water butane nitrogen
Answer:
Benzene
Explanation:
You have to find the freezing point for each of these (make sure they're in Celsius). You might want to double check these but:
Benzene: 5.5
Water: 0
Butane: -138
Nitrogen: -210
The substances that will solidify before the temperature reaches 0°C is benzene. The correct option is A.
What is freezing point?Freezing, also known as solidification, is a phase transition that occurs when the temperature of a liquid falls below its freezing point.
If the intermolecular forces between its molecules are strong, the freezing point is high.
When the forces are weak, the freezing point is low. The freezing point of a liquid or the melting point of a solid occurs when the solid and liquid phases are in equilibrium.
Pure benzene has a freezing point of 5.48 degrees Celsius. Because of the salt in it, fresh water freezes at 32 degrees Fahrenheit, but seawater freezes at around 28.4 degrees Fahrenheit.
Thus, as per the given scenario, the correct option is A.
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Question 5: thanks you
Answer:
A linear molecule has a bond angle of 180°
Which statement best describes the destiny of an atoms nucleus?
Answer:
The answer would be: An atom’s nucleus occupies very little of the atom’s volume but contains most of its mass
Explanation:
The atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom.
Almost all of the mass of an atom is located in the nucleus, with a very small contribution from the electron cloud.
Refer to https://en.wikipedia.org/wiki/Atomic_nucleus for further understanding
HELP URGENT PLS!1!! In what direction and how many spaces must you move the decimal point to make the following conversion?
600 L to mL
left; 6 spaces
left; 6 spaces
left; 3 spaces
left; 3 spaces
right; 6 spaces
right; 6 spaces
right; 3 spaces
To convert from L to ml, we move three spaces to the right and the decimal place moves three places.
Our task here is to convert 600 L to mL. we have to remember that to convert from L to ml, we have to multiply the value in L by 1000
In other words, the value 1000 is known as the conversion factor.
When we do this, we move the decimal place three places to the right to have 600000.00mL
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Can a window pane be considered a mineral?
Answer:
Explanation:
The glass (which does not crystallize even though it is accepted) of a window is NOT a mineral, since it is neither a substance of natural origin (although it is manufactured from natural components) nor does it have a defined crystalline structure, that is, the atoms they are not arranged in an orderly and regular way along axes and planes forming flat faces that keep a symmetry.
Remember that a mineral is defined as a solid, inorganic, homogeneous substance, of natural origin, with a crystalline structure and a determined and well-defined chemical composition within narrow margins and that has regular and characteristic physical properties.
Explanation: No, glass is not a mineral. ... Definable chemical composition: SiO2 *Actually, most industrially-produced glass is not pure silica, but having impurities is still a definable chemical composition so this part of the definition is ok. Orderly arrangement of atoms in a lattice: NO.
Which of these factors will cause a solid solute to dissolve faster?
Answer:
Heat
Explanation:
Higher temperatures cause solid solutes to dissolve at a faster rate than normal
Answer:
Higher temperature
Explanation:
pls answer this guys
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Answer:
wat
Explanation:
Answer:
Basic ABCHope it helps..Hydrogen bromide is found in volcanic gas. What is the chemical formula for
this compound?
Answer:
Hydrogen bromide, anhydrous appears as a colorless gas with a pungent irritating odor. Corrosive. Heavier than air. Prolonged exposure to fire or intense heat may result in the violent rupture and rocketing of the container. Long-term exposure to low concentrations or short-term exposure to high concentrations can result in adverse health effects from inhalation. Used to make other chemicals and as a catalyst in the manufacture of chemicals. Rate of onset: Immediate Persistence: Minutes to hours Odor threshold: 2 ppm Source/use/other hazard: Chemical manufacturing industry; very corrosive.
Explanation:
HBr
Was is meant by the term suprenatural? Does science deal with the supernatural?
A. The term supernatural literally means (within nature) Science deals with the supernatural because it works within nature, not above it
B. The term supernatural literally means (above nature) Science does not deal with the supernatural because it works within nature, not above it
C. The term supernatural literally means (within nature) Science does not deal with the supernatural because it works above nature, not within it
D. The term supernatural literally means (above nature) Science deals with the supernatural because it also works with nature, not within it
Answer:
The term supernatural literally means, Science does not deal with the supernatural because within nature, not within it
Balance the following equation. Choose "blank" if no coefficient other than 1 is needed. CaCl2 + Na2CO3 CaCO3 + NaCl
Answer:
Hi there!!!
The answer is given in picture.
In question we had 2 sodium(Na) and chlorine (cl) but after reaction nacl donot contain it. so, we need to put 2 infront of nacl to make them equal.
As balancing chemical equation refers to the process of keeping or making equal to the atoms of both product and reactant.
Hope it helps..
why scientist use the international system of units
Explanation:
it allows scientists from disparate regions to use a single standard in communicating scientific data without vocabulary confusion.
Which are the physical properties of water
Answer:
Some physical properties of water:
It is odorless.It could appear as a white crystalline solid in solid form, a transparent gas with almost no color but a slight hint of blue in liquid form, or a colorless gas in gas form.It has a melting point of 0°C and a boiling point of 100°C.Its density (at 25°C) is about 0.99701 grams/cm³.It has a viscosity of 0.8903 centi-poise.Of course, there are many more but these are some common ones.
name Two soft metals which can be cut with a knife.
Answer:
lithium, and sodium can be cut with a knife
the density is 5.4 g/mL and the volume is 12.9 mL.
Answer:
69.66 g
Explanation:
We have the following from the question;
Density of the substance = 5.4 g/ml
Volume of substance = 12.9 ml
Mass of substance= the unknown
Since we have both density and volume of the substance, the question must be for us to obtain the mass of the substance, hence;
Density= mass/volume
Mass= Density × volume
Mass = 5.4 g/ml × 12.9 ml
Mass= 69.66 g
What is the main factor responsible for the acidic and basic character of oxides?
Explain your answer.
Explanation:
We define non-metal oxide acidity in terms of the acidic solutions formed in reactions with water. For example, sulfur trioxide reacts with water to forms sulfuric acid. In sum, acidic oxides are oxides of non-metals, and basic oxides are oxides of metals. ... CrO is basic, Cr2O3 is amphoteric and CrO3 is acidic.Reply me in commentsWrite down the importance of nitrogen for plants
Explanation:
People also ask
What is the importance of nitrogen for plants?
Nitrogen is an essential macronutrient for plant function and is a key component of amino acids, which form the building blocks of plant proteins and enzymes. Proteins make up the structural materials of all living matters and enzymes facilitate the vast array of biochemical reactions within a plant.
Answer:
Nitrogen is vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide(i.e.,photosynthesis). It is also a major component of amino acids, the building blocks of proteins. Without proteins, plants wither and die.
I hope this helps.
differentiate between Physical and chemical changes
Answer:
In a physical change the appearance or form of the matter changes but the kind of matter in the substance does not. However in a chemical change, the kind of matter changes and at least one new substance with new properties is formed.
I HOPE THIS WILL HELP YOU IF NOT THEN SORRY HAVE A GREAT DAY:)What are the top three sources of US electricity generation?
The three major categories of energy for electricity generation are fossil fuels (coal, natural gas, and petroleum), nuclear energy, and renewable energy sources.
How is the Law of Conservation of Mass being followed in a voltaic cell with a zinc anode and a copper cathode? A. No mass is lost because electrons are flowing, not atoms. B. The mass lost by the copper electrode is gained by the zinc cathode. C. The Law of Conservation of Mass is not followed when electricity is generated. D. The mass lost by the zinc electrode is gained by the copper cathode.
Answer:
b
Explanation:
In the given scenario, the mass lost by the copper electrode is gained by the zinc cathode. The correct option is B.
What is Law of Conservation of Mass?The law of conservation of mass asserts that mass is neither created nor destroyed in a chemical reaction.
As electrons are lost at the anode, metal cations construct and dissipate into the solution, reducing the anode's mass through corrosion. The anode's lost electrons attract to the positively charged cathode and flow through the wire.
Thus, the correct option is B.
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2 Write the molecular formula of the compounds given below: Sodium hydrogen carbonate b) calcium hydroxide ) silver nitrate d) ammonium sulphate ) Magnesium carbonate f) Ferric oxidea
[tex]\\ \rm\Rrightarrow Sodium\:Hydrogen\:carbonate=NaHCO_3[/tex]
[tex]\\ \rm\Rrightarrow Calcium\:Hydroxide=Ca(OH)_2[/tex]
[tex]\\ \rm\Rrightarrow Silver\:Nitrate=Ag(NO_3)_2[/tex]
[tex]\\ \rm\Rrightarrow Ammonium\:Sulphate=(NH_4)_2SO_4[/tex]
[tex]\\ \rm\Rrightarrow Ferric\:oxide=Fe_2O_3[/tex]
If an atom has three shell and number of valence electrons are two. Is this element metal
or non-metal and why? Name the element and it’s valency.
Answer:
Metal
Element: Calcium
Valency: 2
Explanation:
To find the element, let's use the periodic table. (Look below)
We already went past 3 shells, just need the 2 electrons after it.
Just skip to the 4th row and count 2 to the right
We end up at Calcium.
Calcium is a metal and we're also on the alkaline earth metals column.
Calcium will need to lose 2 electrons to reach stability, so the valency is 2.
a sample of element X contains 90% X-35 atoms,8.0%X-37 atoms, and 2.0% X-38 atoms. The average atomic mass will be closest to which value?
Answer:
35.2.
Explanation
R.A.M= Mass of isotopes divide by 100 percent