Answer:
[Ar] 3d¹⁰ 4s² 4p³
Explanation:
so...... ur welcome
a muscle fiber contracts when myosin filaments pull actin filaments closer together and thus shorten sarcomeres within a fiber. When all the sarcomeres in a muscle fiber shorten, the fiber contracts
Answer:According to the sliding filament theory, a muscle fiber contracts when myosin filaments pull actin filaments closer together and thus shorten sarcomeres within a fiber.
Explanation:
No need for an explanation if i just answered it
The average speed of an oxygen molecule is 6.14 x 104 cm/sec at a certain temperature. What is the average speed of a CO2 molecule at the same temperature? (molar mass O2 = 31.9988; CO2 = 44.0098)
Answer:
the average speed of [tex]V_{av} CO_2[/tex] is 5.24 × 104 cm/s
Explanation:
The computation of the average speed of a [tex]CO_2[/tex] is as follows:
[tex]\sqrt{average} = \sqrt{\frac{8 RT}{\pi M} }[/tex]
where,
M = Molar mass
[tex]V_{av} = \frac{\sqrt{1}}{M}[/tex]
Given that
[tex]V_{av} \ of\ oxygen= 6.14 \times 10^4 cm/s[/tex]
The molar mass of oxygen i.e. (MO_2) = 31.9988 g/mol
And, the molar mass of CO_2 is 44.0098 g/mol
Now
[tex]\frac{V_{av} CO_2}{V_{av} O_2} = \frac{\sqrt{M_{O2} }}{M_{CO2}}[/tex]
Now place these values to the above formula
[tex]\frac{V_{av}CO_2}{6.14\times 104 cm/s} = \frac{\sqrt{31.9988} }{44.0098}[/tex]
So,
V_av CO_2 is 5.24 × 104 cm/s
hence, the average speed of [tex]V_{av} CO_2[/tex] is 5.24 × 104 cm/s
Which of the following observations would be the expected indication that a reaction has taken place when a solution of cesium sulfate is mixed with strontium perchlorate.
Bubbling
Formation of percipitate
Formation of soluble salts
Formation of a gas
Answer:
Formation of precipitate
Formation of soluble salts
Explanation:
Let's consider the molecular equation that takes place when an aqueous solution of cesium sulfate is mixed with an aqueous solution strontium perchlorate.
Cs₂SO₄(aq) + Sr(ClO₄)₂(aq) ⇒ 2 CsClO₄(aq) + SrSO₄(s)
According to the solubility rules:
CsClO₄ is a soluble salt.SrSO₄ is an insoluble salt that precipitates as a solid.For a double displacement reaction to occur, at least one of the products must be insoluble or volatile.
Answer:
It's b) Formation of a precipitate
Explanation:
I took the quiz and got it right.
Sodium chloride (NaCl) can be broken down to produce
pure sodium (Na) and chlorine gas (CI).
Which equation represents this chemical reaction?
A. 2NaCl + Cl2
2Na
B. 2NaCl + 2Na
Cl2
C. 2Na
2NaCl + Cl2
D. 2Naci - 2Na+ Cl2
Answer:
Explanation:
B
Answer:
Explanation:
It D I’m taking it right nowwww
What kind of reaction has the general form A+B → AB?
O A. Combination
OB. Decomposition
O C. Combustion
O D. Displacement
Pls help ASAP
Answer: combination (it is synonymous with synthesis)
A metal sample weighs 57.3g and has volume of 6.3mL what is the density of the sample
Answer:
9.10 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question we have
[tex]density = \frac{57.3}{6.3} \\ = 9.095238...[/tex]
We have the final answer as
9.10 g/mLHope this helps you
consider the reaction between acetylene C2H2 and oxygen in a welding torch 2C2H2 + 5O2 = 4CO2 + 2H2O of 5.4 moles of acetylene react with sufficient oxygen how many grams of CO2 should form
Answer:
C. 4.8*10² g.
Explanation:
Can someone help with 1 2 3 please I give you brainlest
Answer:
1. Option C : oppositely charged
2. Option B : positively charged
3. Option D : negatively charged
Can someone help me please
____________ sedimentary rocks form from the remains of living things.
a.
organic
c.
detrital
b.
chemical
d.
foliated
Answer:
I believe the answer is A. Organic.
Hope it helps!
Answer:
Organic
Explanation:
living things are organic, so chemical is wrong, detrital is when rocks form from broken down rocks left behind, again not from living things so that's also wrong, that leave Organic and foliated, foliated makes no sense which leave only Organic, so organic will be your answer
what is the effect of molecular weight on melting and boiling point of alkanes??
Answer:
Their melting and boiling points of alkanes are relatively low. The higher the molecular weight (the greater the number of carbons), the higher the boiling point.
How many double covalent bonds can form with a hydrogen atom
answer: covalent bonds
A fruit juice has a very sour taste. What does this most likely indicate?
A. The juice is a metal
B. The juice is a salt
C. The juice is an acid
D. The juice is a base
Explanation:
its hard its either B or C i dont wanna be wrong;-;
Answer:
The Juice wouldnt be a metal, Salt isnt that effective in juice if you have sensitive tastebuds. Your answer is C. THe Juice is an acid
Explanation:
PLEASE HELP! (IM GIVING BRAINLIEST) Which of the following is a monatomic cation?
A.) NH4+
B.) SO4 -2
C.) Fr+
D.) Br-
Answer:
C. Francium
Explanation:
Bromine is diatomic, and A + B are polyatomic ions. C is the right answer
Answer:
Fr^+
Explanation:
took the test
What is the mass % of acetone in a 1.77 M solution of acetone (MM = 58.08 g/mol) in water? The density of the solution is 0.971 g/mL.
Answer:
[tex]\%m/m=10.6\%[/tex]
Explanation:
Hello!
In this case, since the by-mass percent is defined by:
[tex]\%m/m=\frac{m_{solute}}{m_{solution}} *100\%[/tex]
Thus, since the given 1.77 M solution is given in terms of mol/L, we need to compute the mass of acetone via its molar mass and the volume of solution in L to g via the density:
[tex]\%m/m=1.77\frac{mol}{L}*\frac{58.08g}{1mol}*\frac{1L}{1000mL}*\frac{1mL}{0.971g} *100\%\\\\\%m/m=10.6\%[/tex]
Best regards!
Determine the number of hydrogen atoms in an alkyne with one carbon–carbon triple bond and 4 carbon atoms.
number of hydrogen atoms: ?
Answer:
There are 6 hydrogen atoms.
Explanation:
The formula for an alkyne that has only one triple bond is as follows:
CₙH₂₍ₙ₎₋₂Where n is any natural number greater than 2.
For this problem, n=4. This would mean the formula is:
C₄H₂₍₄₎₋₂Thus
C₄H₈₋₂C₄H₆Thus the answer is 6, there are 6 hydrogen atoms.
Fe + CuCl2 → FeCl2 + Cu
The type of reaction represented by the above equation is -
decomposition
synthesis
single-replacement
double-replacement
Answer:
the type is single replacement
The given reaction equation represents a single-replacement reaction.
Explanation:
A chemical reaction is defined as the rearrangement of the atoms of a substance to give a new substance as a product.A decomposition reaction is a type of chemical reaction in which a substance breakdowns into two or more than two simpler substances.ABC→ A+B+C
A synthesis reaction is a chemical reaction in which two or more compounds are combined together to form a single compound.A+B+C → ABC
A single-replacement reaction is defined as the chemical reaction in which an element replaces another element from its compound.AB+ C → AC + B
A double-replacement reaction is defined as the chemical reaction in which ions of compounds are exchanged.AB+ CD → AC + BD
Given:
[tex]Fe + CuCl_2 \rightarrow FeCl_2 + Cu[/tex]
To find:
The type of chemical reaction represented by the given equation.
Solution:
In the given reaction:
[tex]Fe + CuCl_2 \rightarrow FeCl_2 + Cu[/tex]
Iron is replacing copper from its compound which is copper(II) chloride to give iron(II) chloride and copper as a product.
So from this, we can conclude that the given reaction equation represents a single-replacement reaction.
Learn more about types of chemical reactions here:
brainly.com/question/1071297?referrer=searchResults
brainly.com/question/12844777?referrer=searchResults
6. If you 5.5 mol of Nitrogen in: N2 + 3H2 → 2NH3
a. How many moles of Hydrogen are needed to completely react with the nitrogen?
b. How many moles of Ammonia will be produced?
Answer:
Therefore 9 moles of nitrogen are required to produce 18 moles of ammonia.
When warm, less dense air ________, an area of low pressure is left behind.
A
rises
B
disappears
C
sinks
D
moves south
Answer:
B
disappears
Explanation:
Bbbbbbbbbb
5.00 ml of an H2SO4 solution with unknown molarity was diluted with 25.00 ml. This was tirated with 15.00ml of .1000 M NaOH to reach the equivalence point. What is the molarity of the original unknown H2SO4 solution? Also, what would the balanced chemical equation for this reaction be?
Answer:
0.1500 M
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O
Explanation:
The balanced chemical equation is:
H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂OFirst we calculate how many NaOH moles reacted, using the volume and concentration:
15.00 mL * 0.100 M = 1.5 mmol NaOHThen we convert NaOH moles into H₂SO₄ moles:
1.5 mmol NaOH * [tex]\frac{1mmolH_2SO_4}{2mmolNaOH}[/tex] = 0.75 mmol H₂SO₄This amount of H₂SO₄ moles was originally contained within 5.00 mL of solution, thus the molarity is:
0.75 mmol H₂SO₄ / 5.00 mL = 0.1500 Mbalance the chemical equation KC1O3→KC1+O2
Answer:
2 KCO3 → 2 KC + 3 O2
Explanation:
Reaction Type
Decomposition
Reactants
KCO3
Products
KC
Dioxygen - O2
O₂ Oxygen Molecular Oxygen Diatomic Oxygen Triplet Oxygen Oxygen Gas Liquid Oxygen LOx
A chemist combine did 3.50g of potassium level with chlorine gas to yield 6.6 7g of potassium for it. Assuming all the potassium was consumed, and that potassium chloride was the only product that formed, what mass of chlorine reacted?
Answer: mass of chlorine reacted is 3.18 g
Explanation:
2 K + Cl2 = 2KCl
no. of moles of K = mass / molar mass
= 3.50 / 39
= 0.0897
no. of moles of KCl = mass / molar mass
= 6.67 / 74.5
= 0.0895
no. of moles of Cl2 required = number of moles of KCl / 2
= 0.0895 / 2
= 0.0448 moles
mass of Cl2 required = no. of moles of Cl2 required x molar mass
= 0.0448 x 71
= 3.1808 g ≈ 3.18 g
Therefore mass of chlorine reacted is 3.18 g
Which of the following physical properties is NOT characteristic of a metal?
A.Malleable
B.Solid at room temperature
C.Dull in color
D.Good conductors
Joshua wants to create something to put between a hot pot and a table, so he doesn't burn the table. He
knows he needs to choose a material that does not conduct heat well. Which material would be the best for
him to choose?
A. Wood
B. Aluminum
C. Copper
D. Glass
What is the difference between a purine and a pyrimidine?
Answer: Adenine and guanine are the two purines and cytosine, thymine and uracil are the three pyrimidines. The main difference between purines and pyrimidines is that purines contain a sixmembered nitrogencontaining ring fused to an imidazole ring whereas pyrimidines contain only a sixmembered nitrogencontaining ring. They both are types or categories of nitrogen containing bases present in nuclei acids of DNA and RNA.
Purines are 2 Ring or Carbon Ring, Nitrogen containing bases. That consist of these 2 rings next placed next to each other. These examples include - Adenine and Guanine.
Pyrimidines are 1 or single Ring Nitrogen containing structures. There are 3 nitrogenous bases that are categorized as pyrimidines. Cytosine, Thymine, and Uracil.
Which of the following shows correctly an ion pair and the correct formula for the ionic compound the two ions form?
A) Cu1+, O2–; CuO
B) Cr3+, I–; CrI
C) Sn4+, N3–; Sn4N3
D) Fe3+, O2–; Fe2O3
Answer:
D) Fe³⁺, O²⁻; Fe₂O₃
Explanation:
Option D shows correctly an ion pair and the correct formula for the ionic compound the two ions form.
Ion pairs of iron and oxygen react to form iron (III) oxide. The iron (III) oxide is one of the oxides of iron. The compound is usually attacked by acids and it is often called rust. It is used in the feedstock of the steel and iron industries. This means that the compound is used in the production of iron, steel, and many alloys.
Below are some equations:
4 Fe + 3 O₂→ 2 Fe₂O₃
Fe⁰ + 3O₂⁰ → Fe³⁺O₃²⁻
A student drops a rubber ball from a height of 100cm and draws a diagram to show the path of a bouncing ball. Describe the energy transformation that occurs as the ball goes from position A to E. Include the words kinetic energy and potential energy in your explanation.
Picture is down below.
Answer:
hjgihgvoj
Explanation:
Density of molecules
(6
32. Calcium carbide, CaC2, is an important preliminary chemical for industries producing
synthetic fabrics and plastics. CaC2 may be produced by heating calcium oxide with
CaO + C CaC2+CO
What is the mass of CaC2 which can be produced from the reaction of excess calcium oxi
10.2 g of carbon? (Hint: Balance the equation first)
Answer:
18.1 g
Explanation:
Step 1: Write the balanced equation
CaO + 3 C ⇒ CaC₂ + CO
Step 2: Calculate the moles corresponding to 10.2 g of C
The molar mass of C is 12.01 g/mol.
10.2 g × 1 mol/12.01 g = 0.849 mol
Step 3: Calculate the moles of CaC₂ produced from 0.849 moles of C
The molar ratio of C to CaC₂ is 3:1. The moles of CaC₂ produced are 1/3 × 0.849 mol = 0.283 mol
Step 4: Calculate the mass corresponding to 0.283 moles of CaC₂
The molar mass of CaC₂ is 64.10 g/mol.
0.283 mol × 64.10 g/mol = 18.1 g
An object that has kinetic energy must be?
A at rest
B stopped
C in motion
Or
D at an elevated position
Answer:
C in motion
Explanation:
trust