Answer:
B. The order in which specific traits may have evolved
Explanation:
Write the chemical formula of the ionic compound that is formed with Na+ combines with S2-
Answer:
Compounds are formed by the combination of cation and anion.
On combining all the possible positive ions with negative ions, we get
CuCl
2
,CuSO
4
,NaCl,Na
2
SO
4
,FeCl
3
,Fe
2
(SO
4
)
3
Explanation:
ur ans
A bone contains 6.25% of Carbon -14 it began with. How old is the bone ?
Answer:
Is there a multiple choice??
Explanation:
5.478 grams of potassium acetate and 2.143 grams of iron(III) hydroxide are added to a beaker containing 100.0 mL of water and stirred vigorously. A solid settles to the bottom of the beaker. If the water is decanted and the solid is dried, what is the maximum mass of solid that should be recovered
Solution :
[tex]$Fe(OH)_3+3CH_3COOK \rightarrow Fe(CH_3COO)_3 + 3KOH$[/tex]
(iron (potassium
hydroxide) acetate)
Number of moles of [tex]$Fe(OH)_3 = \frac{\text{mass of }Fe(OH)_3}{\text{molar mass of }Fe(OH)_3}$[/tex]
[tex]$=\frac{2.143 \ g}{106.867 \ g/mol}$[/tex]
= 0.02005 mol
Number of moles of [tex]$CH_3COOK = \frac{\text{mass of }CH_3COOK}{\text{molar mass of }CH_3COOK}$[/tex]
[tex]$=\frac{5.478 \ g}{98.15 \ g/mol}$[/tex]
= 0.0585 mol
Since 1 mol of [tex]$Fe(OH)_3$[/tex] reacts with 3 mols of [tex]$CH_3COOK$[/tex]
Therefore, number of moles of [tex]$CH_3COOK$[/tex] reacted [tex]$=\frac{0.0585}{3 }$[/tex] mol
= 0.0195 mol
Therefore the limiting reagent is [tex]$CH_3COOK$[/tex] and hence the number of moles of [tex]$Fe(CH_3COO)_3$[/tex] produced is 0.0195 mol
Amount of [tex]$Fe(CH_3COO)_3$[/tex] produced = moles x molar mass
= 0.0195 moles x 232.98 g/mol
= 4.5431 g
6.25 x 10^22 Molecules of BR2 = ?moles
0.104 mol Br₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
6.25 × 10²² molecules Br₂
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 6.25 \cdot 10^{22} \ molecules \ Br_2(\frac{1 \ mol \ Br_2}{6.022 \cdot 10^{23} \ molecules \ Br_2})[/tex]Multiply/Divide: [tex]\displaystyle 0.103786 \ mol \ Br_2[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
0.103786 mol Br₂ ≈ 0.104 mol Br₂
What is the rate of reaction
Answer:
The reaction rate is defined as the amount of substance that is transformed into a given reaction per unit volume and time.
why do you think they stilk proruxe bright flowers to attract bees?
Answer:
A
Explanation:
In order for plants to entice pollinators, they must first offer their favorite foods: nectar and protein. Since most pollinators fly, the colors of a flower must attract them; therefore, the brighter the flower, the more likely it will be visited. ... For instance, bees are attracted to bright blue and violet colors.
hope this helps you out...
A compound decomposes by a first-order process. If 36 %% of the compound decomposes in 60 minutes, the half-life of the compound is ________minutes. A compound decomposes by a first-order process. If 36 of the compound decomposes in 60 minutes, the half-life of the compound is ________minutes. -5 93 41 -18 39
Answer: The half-life of the compound is 93 minutes
Explanation:
Expression for rate law for first order kinetics is given by:
[tex]t=\frac{2.303}{k}\log\frac{a}{a-x}[/tex]
where,
k = rate constant
t = age of sample
a = let initial amount of the reactant =100
a - x = amount left after decay process = (100-36) = 64
a) for completion of 36 % of reaction
[tex]60=\frac{2.303}{k}\log\frac{100}{100-36}[/tex]
[tex]k=\frac{2.303}{60}\log\frac{100}{64}[/tex]
[tex]k=0.0074min^{-1}[/tex]
b) for completion of half life:
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
[tex]t_{\frac{1}{2}}=\frac{0.693}{k}[/tex]
[tex]t_{\frac{1}{2}}=\frac{0.693}{0.0074min^{-1}}=93min[/tex]
The half-life of the compound is 93 minutes
True or False:
Houston, Texas received approximately 2 inches of snow on February 15, 2021. Based on this, we can now say Houston's climate consists of long, freezing winters and yearly snowfall. Please answer ASAP. Thanks
Answer:
False.
Explanation:
I majored in Chemistry
2. Explain in your own words what will happen to the chemical structure of aspirin when it is in solution at pH 1.0. Compare this to what will happen to the chemical structure of aspirin at pH 8.0. Highlight your answers by drawing appropriate chemical structures for aspirin at each of the pH values.
Answer:
don't sent such messages whatever you are
According to the concept of solubility and dissociation, aspirin at pH 8 and 10 undergoes dissociation to yield ions.
What are ions?
An ion is defined as an atom or a molecule which has a net electrical charge. There are 2 types of ions :1) cation 2) anion . The cation is the positively charged ion and anion is the negatively charged ion . As they are oppositely charged they attract each resulting in the formation of ionic bond.
Ions consisting of single atom are mono-atomic ions while which consists of two or more ions are called as poly-atomic ions . They are created by chemical interactions . They are very reactive in their gaseous state and rapidly react with oppositely charged ions resulting in neutral molecules.Ions are generated on dissociation.
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Kinetic energy is energy stored in an object due to its position.
True
Or
False
Answer:
[tex]\boxed {\boxed {\sf False}}[/tex]
Explanation:
Kinetic energy is the energy of movement or energy at work. An example is a ball rolling down a hill.
Potential energy is stored energy due to the position of an object. For example, a ball resting at the top of a hill.
The question incorrectly described potential energy as kinetic energy. Therefore, the answer is false.
How many atoms are in 6.30 moles of sulfur (S)?
Answer: 3.79*10^24 atoms
Explanation:
1 mole = 6.02214076*10^23 atoms
What is the name for Si3S
Answer:
Silicopropane
Explanation:
Choose the correct statement.
A) Anions gain electrons having a charge of positive.
B) Cations lose electrons having a charge of positive
C)Cations lose electrons having a charge of negative.
D)Anions gain electrons having a charge of neutral.
Answer:
B) Cations lose electrons having a charge of positive.
Explanation:
Hello there!
In this case, it is widely known that ions are classified as positive cations and negative anions, since the former is produced when a metal loses electrons and the latter when a nonmetal gains electrons; in such a way, the correct choice is:
B) Cations lose electrons having a charge of positive.
Best regards!
Answer:
Either B or A
Explanation:
The other answer said B, and I said either B or A, so anyone who is currently cheating on a chemistry test, try B
i don’t get this- it’s due tmrw
please help asappp♀️!
40 points for this question PLEASE HELP SOMEONE ILL GIVE BRAINLIEST
Answer:
whats the question?
Explanation:
which statement describes the energy and bonding changes as two atoms of fluorine become a molecule of fluorine?
Statement that gives description as regards energy and bonding changes between atoms such as fluorine become a molecule of fluorine, bond Energy is released as a bond is formed. Thus option 4 is correct.
What is bond energy ?The Bond Energy otherwise called as bond enthalpy is a quantity that offers insight into the strength of a chemical bond.
The ‘bond energy’ can also be represented as “the average value obtained from the bond dissociation enthalpies of all the chemical bonds in a given chemical compound.
The bond energy of a chemical bond is directly proportional to the stability of that bond which implies that the greater the bond energy o between two atoms, the greater the stability of that chemical bond.
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Your question was incomplete. The probable question.
Which statement describes the energy and bonding changes as two atoms of fluorine become a molecule of fluorine?
1.Energy is absorbed as a bond is broken.
2.Energy is absorbed as a bond is formed.
3.Energy is released as a bond is broken.
4.Energy is released as a bond is formed.
Which would occur if a ball x were rolled across a smooth floor to collide with a similar ball y that was stationary
Answer:
For a collision where objects will be moving in 2 dimensions (e.g. x and y), the momentum will be conserved in each direction independently (as long as there's no external impulse in that direction). In other words, the total momentum in the x direction will be the same before and after the collision.
Explanation:
I need help ASAP pls the last question
Answer:When more gas particles enter a container, there is less space for the particles to spread out, and they become compressed. ... The particles exert more force on the interior volume of the container. This force is called pressure.
Explanation:
What would be an inference you could make about this cat?
Answer:
pickles are ligit good
Explanation:
i like pickles but not his
Carbon dioxide is produced by the human body through
O combustion
O respiration
O photosynthesis
O decomposition
Answer:
Respiration
I hope this helps!
Explain how Milankovitch cycles can be used to predict future changes in Earth's climate
How many atoms is 45 moles of silicon (Si)?
What is the answer to this question?
Answer:
Its is C urea if this is correct please make me brainliest
Explain the concept of law of multiple proportions
Which process occurs during transpiration?
A.
During transpiration, water vapor precipitates from plants.
B.
During transpiration, water vapor evaporates from plants.
C.
During transpiration, water vapor condensates from plants.
D.
During transpiration, water vapor collects from plants.
E.
During transpiration, water vapor is absorbed by plants.
Answer:
It should be B
Explanation:
because I just searched it up if I'm wrong I'm wrong
Answer:transpiration just took the test
Explanation:
100%
Ap LSCHpnGKIASAJQSMZc4qoidborFmvFig/USHTVPBWHqozowvg Viewo
8. Two or more forces that cancel each other out are*
A:Net forces
B:balanced forces
C:Unbalanced forces
D:Normal force
Answer:
Balance and Unbalanced.
Argon makes up about 0.93% of our atmosphere. If the atmospheric pressure is 760 mm Hg, what is the pressure contributed by argon?
Answer:
[tex]P_{Ar}=7.068mmHg[/tex]
Explanation:
Hello!
In this case, according to the given percent of argon in our atmosphere, it is possible to compute the pressure contributed by it as shown below:
[tex]P_{Ar}=P_{atm}*0.93\%[/tex]
Thus, we plug in to obtain:
[tex]P_{Ar}=760mmHg*0.0093\\\\P_{Ar}=7.068mmHg[/tex]
Best regards!
The pressure of the argon gas will be equal to [tex]P_{Ar}=7.068 \rm\ mmHg[/tex]
What will be the pressure of the argon gas?Pressure is defined as the normal force acting on any surface in the case of gases it is the normal force acting on the surface of the earth.
now it is given in the question that the Argon contains 0.93% part in the atmosphere.
So here are the calculations
[tex]\rm P_{Ar}=P_{Atm}\times 0.93[/tex]%
[tex]\rm P_{Ar}=700\times 0.93[/tex]%
[tex]\rm P_{Ar}=7.068\ mmHg[/tex]
Thus the pressure of the argon gas will be equal to [tex]P_{Ar}=7.068 \rm\ mmHg[/tex]
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The carbon cycle is the exchange of carbon between the lands, the oceans the atmosphere and the earth's interior
O True
O False
Answer:
True
Explanation:
Carbon is the backbone of life on Earth. Most of Earth's carbon, about 65,500 billion metric tons is stored in rocks. The rest is in the ocean, atmosphere, plants, soil, and fossil fuels. Carbon flows between each reservoir in an exchange called the carbon cycle, which has slow and fast components.
How do most animals produce offspring
Answer:
Some animals produce offspring through asexual reproduction while other animals produce offspring through sexual reproduction. Both methods have advantages and disadvantages. Asexual reproduction produces offspring that are genetically identical to the parent because the offspring are all clones of the original parent.
Explanation: