Answer:
23.1 grams of sodium is use for this kind of stuff
Alkanes are considered as saturated hydrocarbons and thus...
A.have only single bonds
B.contain a benzene ring
C.contain a triple bond
D.contain at least one double bond
Answer:
A
Explanation:
Option A is correct. Saturated hydrocarbons are stable compounds, which means that they only have single bonds between carbon atoms.
b. Sugar and salt are both white, crystalline powders that dissolve in water. If you were given an unknown sample that contained one or both of these solids, how could you determine what your unknown sample contained (without tasting it)? (2 points)
We can distinguish between sugar and salt without tasting but using some chemical tests. Adding silver nitrate to the solution will produce a white precipitate if chloride is present in it. Similarly if the solution is dehydrates the brown colored solid remains indicates the presence of sugar.
What is qualitative analysis ?Qualitative analysis are used to test the quality or identity of a sample or compound. The samples are treated with other compounds to test for the anions or cations present in them.
For sugar, we can use sulphuric acid testing or boiling. Just boil the solution to test whether it gives a brown dehydrate.
Similarly we can check for chloride ions if salt is present. Add some silver nitrate to the sample. If it produces a white precipitate, it contains salt. The formed precipitate is silver chloride.
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How many electrons are in Tin's (Sn) highest energy level?
What is the molecular geometry about the antimony atom in the structure below?
[Image description: A Sb atom is singly bound to five Fatoms. There is one electron pair on Sb. Each Fhas
three electron pairs. The molecule as a 2- charge.]
720
FF
Answer:
Square Pyramidal.
Explanation:
Because the Sb atom has six electron domains (five bounded and one unbounded), its electron domain geometry is octahedral.
Because one electron domain is unbounded, its molecular geometry is square pyramidal.
What amino acid covalently bind transport and store ammonia
Answer:
Which amino acid bind ammonia?
Ammonia is loaded via glutamine synthetase by the reaction, NH3 + glutamate → glutamine. It occurs in nearly all tissues of the body.
what are two ways to increase thermal energy are
1. Name three obstacles that Mendeleev faced in his life?
Answer:
was difficult to place isotopes of elements as they have the same chemical properties but different atomic masses. It was not possible to predict how many elements could be discovered between two heavy elements as the rise in atomic mass is not uniform.
The three obstacles that Mendeleev faced in his life include the following:
He found it difficult to place isotopes of elements in a group He found it difficult to fit some elements in the periodic table.He had marital problems which made him practice bigamy.Who was Mendeleev?Mendeleev was of Russian region and was instrumental in the formation of
the periodic law and table. He faced several challenges such as marital
issues and also in the formulation of the periodic table as it became
ambiguous for him.
He couldn't fit in some elements on the table due to differences in the order
of atomic masses .
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Suppose that 25.0 mL of 0.440 M sodium chloride is added to 25.0 mL of 0.320 M silver nitrate. How many moles of silver chloride precipitate? What would be the concentrations of each of the ions in the reaction mixture after the reaction?
The number of moles of silver chloride that will precipitate is 0.008 mole
From the question,
We are to determine the number of moles of silver chloride that will precipitate
First,
We will write a balanced chemical equation for the reaction
The balanced chemical equation for the reaction is
NaCl + AgNO₃ → AgCl + NaNO₃
This means
1 mole of sodium chloride reacts with 1 mole of silver nitrate to produce 1 mole of silver chloride and 1 mole of sodium nitrate
Now, we will determine the number of moles of each reactant present
For sodium chloride (NaCl)Concentration = 0.440 M
Volume = 25.0 mL = 0.025 L
Using the formula
Number of moles = Concentration × Volume
∴ Number of moles of NaCl present = 0.440 × 0.025
Number of moles of NaCl present = 0.011 mole
For silver nitrate (NaNO₃)Concentration = 0.320 M
Volume = 25.0 mL = 0.025 L
∴ Number of moles of NaNO₃ present = 0.320 × 0.025
Number of moles of NaNO₃ present = 0.008 mole
From the balanced chemical equation,
1 mole of sodium chloride reacts with 1 mole of silver nitrate to produce 1 mole of silver chloride
Then,
0.008 mole of sodium chloride will react with the 0.008 mole of silver nitrate to produce 0.008 mole of silver chloride
∴ 0.008 mole of silver chloride will be produced
Hence, the number of moles of silver chloride that will precipitate is 0.008 mole
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How many atoms are in 9.35 moles of lithium?
Answer:
Answer: 3.45 moles Li contains 2.08 × 10 (to the power of)24 atoms . Explanation: The relationship between atoms and moles is:. 1 mole atom. =6.022
Answer:
[tex]\boxed {\sf 5.63 \times 10^{24} \ atoms \ Li}}[/tex]
Explanation:
We are asked to find how many atoms are in 9.35 moles of lithium (Li)
Moles are converted to atoms using Avogadro's Number or 6.022×10²³. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this case, the particles are atoms of lithium.
We convert using dimensional analysis, so we set up a conversion factor using Avogadro's Number.
[tex]\frac {6.022 \times 10^{23} \ atoms \ Li}{1 \ mol \ Li}[/tex]
We are converting 9.35 moles of lithium to atoms, so we multiply the conversion factor by this value.
[tex]9.35 \ mol \ Li *\frac {6.022 \times 10^{23} \ atoms \ Li}{1 \ mol \ Li}[/tex]
The units of moles of lithium cancel.
[tex]9.35 *\frac {6.022 \times 10^{23} \ atoms \ Li}{1 }[/tex]
[tex]9.35 *{6.022 \times 10^{23} \ atoms \ Li}[/tex]
[tex]5.63057\times10^{24} \ atoms \ Li[/tex]
The original value of moles (9.35) has 3 significant figures, so our answer must have the same. For the number we found that is the hundredth place. The 0 in the thousandth place tells us to leave the 3 in the hundredth place.
[tex]5.63 \times 10^[24} \ atoms \ Li[/tex]
9.35 moles of lithium contains approximately 5.63×10²⁴ atoms of lithium.
The volume of a gas varies inversely as the pressure upon it. The volume of a gas is 1600 cm3 under a pressure of 4 kg/2. What will be its volume under a pressure of 640 kg/cm2?
Answer:
10cm3
v ∞ 1\p
by introducing a constant k
v = k\p
making k subject of the formula
k= vp
k= 1600×4
k=6400
to find the second volume
k=vp
6400=v×640
v=6400\640
v=10cm3
help please thank you so muchhh
³
hope it helps!correct me if I'm wrong
state three properties of oxygen
Answer:
Color : Colorless.
Phase : Gas. ...
Odor : Oxygen is an odorless gas.
Taste : A tasteless gas.
Conductivity : A poor conductor of heat and electricity.
Solubility : Slightly soluble in water, alcohol and some other common liquids.
Density : It is denser than air.
Explanation:
A __________ compound is a cyclic compound in which one or more of the ring atoms is an atom other than carbon. g
Answer:
heterocyclic compound
Explanation: by the fact that some or all of the atoms in their molecules are joined in rings containing at least one atom of an element other than carbon
The element used most in development of atomic weapons
Answer:
Explanation:
uranium processing.
3CH4 and C3H12 have the same number and kind of elements. How are they different?
3CH4 refers to three molecules of a compound and C3H12 refers to only one molecule of a compound.
3CH4 and C3H12 are actually different molecules though they contain the same number and types of atoms. Recall that both of them are hydrocarbons hence they contain only hydrogen and carbon.
3CH4 refers to three molecules of methane while C3H12 refers to one molecule of diphenyl methane. Hence 3CH4 refers to three molecules of a compound and C3H12 refers to only one molecule of a compound.
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What do these two changes have in common?
The law of conservation of mass states that mass is neither created nor destroyed during a chemical reaction. This can be gleaned from the third postulate in Dalton's series. Magnesium oxide decomposes into magnesium and oxygen. If 4.03 g of magnesium oxide decomposes to form 2.43 g of magnesium, what mass of oxygen gas is also released in the reaction
Answer:
Explanation:
The law of conservation of mass states that mass is neither created nor destroyed during a chemical reaction. This can be gleaned from the third postulate in Dalton's series. Magnesium oxide decomposes into magnesium and oxygen. If 4.03 g of magnesium oxide decomposes to form 2.43 g of magnesium, what mass of oxygen gas is also released in the reaction
The word say magnesium oxide decomposes to magnesium and oxygen
the chemical symbols say
MgO-----------> Mg + O2 (since natural oxygen is diatomic)
the balanced equation says
2MgO-------------->2Mg + O2
4.03 gm----------> 2.43 + ?0 gms
tour high school Algebra I class says
? = 4.03 -2.43 =1.60
your chemical analytcal lab says %mO in MgO = 16/40.3 = 39.7%
your calculator says
39.7/100 X 4.03 = 1.60
all of these prove the law of conservation of mass
The arrow and
blue colored
blocks indicate
the
elements.
NO LINK
Answer:
The arrow and blue colored blocks indicate the transition metal elements
Explanation:
B.
"The arrow and blue colored blocks in periodic table indicate transition elements. "
What is transition elements?
The type of elements in which the last electrons enter into d-orbital can be referred to as transition elements. They can be placed in the middle of the periodic table. they are indicated with blue color in the periodic table so that it is easy to identify transition element in periodic table. Transition elements can show colored property because it shows d-d transition.
The electronic configuration of transition elements can be shown as:
(n-1)[tex]d^{1-10}[/tex]n[tex]s^{1-2}[/tex].
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what is the fnction of a cell membrance
Answer:
Maybe to hold the whole parts of the cell
I need to solve #5 and #6
Answer:
hello
Explanation
sup
solveeeeee plzzzzzzzzz
what shows the substance at the highest temperature?
Answer:
needs more information
Explanation:
We need more information (like picture options / etc), but a substance at it's highest temperature will have the most movement in it's molecules. Depending on the substance, it may be in a gas or plasma form (free moving molecules).
Hope this helps, have a nice day! :D
Which of the following statements is true?
All physical properties depend on how much material you have.
Some physical properties, like mass, volume, and density, depend on how much material you have.
The density of a material may differ as it changes state.
Changing the state of a material from solid to gas, for example, generally makes the material more dense.
Answer:
Es la tercera por qué cuando el material varía va cambiando de estado
Explanation:
Using the name of the ionic compound, select the appropriate chemical formula. Use the periodic table
that has been provided. Click here to access the common polyatomic ion sheet.
Sodium acetate
a. NaC2H302
b. SC2H302
c. Na2C2H302
Answer:
A
Explanation:
Abcd
The chemical formula for sodium acetate is NaCH₃COO.
What is the chemical formula?A symbolic representation of the chemical composition of an element or a compound is its chemical formula. The chemical formula helps in providing information about the elements that make up the molecules of a compound. It also represents the ratio in which the atoms of these elements combine to form such molecules.
For example, H₂O, which is the chemical formula for water, shows that there are two hydrogen atoms combined with one oxygen atom to form one molecule of water.
For writing a chemical formula, it is important that there is knowledge of the symbols of the elements that are present in the compound. The formula of the radicals should be known along with the valency of the elements in that compound.
Therefore, the chemical formula for sodium acetate is NaCH₃COO.
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The process when the more dense plate gets pushed under a less dense plate.
Conduction
Subduction
Answer:
The correct answer is Subduction
HELP PLS (CHEMISTRY)
How is writing formulas for ionic compounds with transition metals different from the regular metals?
The first most obvious thing to note is when naming transitional metals, you have to state its charge with roman numerals (except for 1 if I remember correctly). For example, Iron (lll), iron has a charge of 3.
What is the potential energy of your 3 kg puppy that is sitting in the grass in your backyard?
As we know that
P.E. = mgh
where,
P.E. = Potential energy of the object =?
m= mass of object= 3kg
g= acceleration due to gravity = 9.8 ms^-2
h = height between object and animal = 0 m
Then
P.E. = 3× 9.8 × 0 = 0 Joules or 0J
Have a luvely day!
Please help me !!!!!!!!!!!!!!!!!!!!!!
Answer:
sure ill help you
Explanation:
How many moles are of sodium are needed to react completely with 3.1 moles of chlorine in the reaction shown below? (Work shown is preferred)
2Na(s) + Cl2(g) —> NaCl(s)
A) 3.1 moles Na
B) 1.5 moles Na
C) 2 moles Na
D) 6.2 Na
Answer: D. 6.2 Na
Explanation: Just took the test
Which of the following correctly identifies the intermolecular force represented by A and compared its strength relative to the intermolecular force represented by B
A represents hydrogen bonding, which is weaker than the force represented by B correctly identifies the intermolecular force represented by A and compared its strength relative to the intermolecular force represented by B. Therefore, option B is correct.
What is intermolecular force ?Intermolecular forces, such as electromagnetic forces of attraction or repulsion that act between atoms and other kinds of nearby particles, such as atoms or ions, mediate interactions between molecules.
The forces that draw molecules together are known as intermolecular forces. These forces are crucial because they enable chemists to ascertain a substance's state, melting point, boiling temperature, and other physical characteristics. The higher the melting and boiling temperatures are, the stronger the intermolecular forces are.
The strength of the London force will differ greatly if the molecules have highly different molar masses (by a factor of 2 or more).
Thus, option B is correct.
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your question is incomplete, probably the question was Which of the following correctly identifies the intermolecular force represented by A and compared its strength relative to the intermolecular force represented by B A represents London dispersion forces, which are weaker than the force represented by B. A represents hydrogen bonding, which is weaker than the force represented by B. A represents London dispersion forces, which are stronger than the force represented by B. A represents hydrogen bonding, which is stronger than the force represented by B.
