Answers
Answer:
D
Explanation:
because reduction is gain of electron so Cl- gained one electron hope this make sense :)
Related Questions
If a sample of 12.0 grams of fluorine gas at 45.00C has a pressure of 0.544 atm, what is the volume of the container?
R = 0.0821 L atm/mol K
15.1 L
4.29 L
30.3 L
2.14 L
Answers
Answer: Volume of the container is 30.3 L.
Explanation:
Given: Mass = 12 g
Temperature = [tex]45^{o}C[/tex] = (45 + 273) K = 318 K
Pressure = 0.544 atm
R = gas constant = 0.0821 L atm/mol K
Moles is the mass of substance divided by its molar mass.
Hence, moles of fluorine (molar mass = 18.99 g/mol) are as follows.
[tex]Moles = \frac{mass}{molar mass}\\= \frac{12.0 g}{18.99 g/mol}\\= 0.631 mol[/tex]
Formula used to calculate the volume of container is as follows.
PV = nRT
where,
P = pressure
V = volume
n = no. of moles
R = gas constant
T = temperature
Substitute the value into above formula as follows.
[tex]PV = nRT\\0.544 atm \times V = 0.631 mol \times 0.0821 L atm/mol K \times 318 K\\V = 30.3 L[/tex]
Thus, we can conclude that volume of the container is 30.3 L.
The activation energy for a reaction is the energy difference between what two components of a reaction?
reactant and the intermediate
product and the reactant
reactant and the activated complex
product and the intermediate
Answers
Answer:
Option C: reactant and the activated complex
Explanation:
The activation energy for a reaction is the energy difference between reactant and the activated complex.
What is activation energy?The minimum amount of energy required by reactant to complete the reactant or to form activated complex or reach at activated complex stage is called activation energy.
What is threshold energy?The minimum energy must posses by reactant that is colliding molecule to make effective collision and form product in a reaction is called threshold energy.
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When the products of a reaction have less energy than the reactants
Answers
Answer:
the energy of the products is less than the energy of the reactants.
Explanation:
the the change is enthalpy is negative, and heat is released to the surroundings.
A location along stream where most erosions occur
Answers
Answer:
At a stream's headwaters, often high in the mountains, gradients are steep. The stream moves fast and does lots of work eroding the stream bed.As a stream moves into lower areas, the gradient is not as steep. Now the stream does more work eroding the edges of its banks.
hope that helps bby<3
Which of the following elements is a metalloid (semimetal)?
C
P
Sb
N
In
Answers
Answer:
Sb
Explanation:
Sb (antimony) is an metalloid
Which substance would require the most energy to heat 10.00 g of it by 10.0°C?
O Ice, c = 2.03 Jigº
O Mercury, c = 0.140 J/gºC
O Water, c = 4.18 J/gºC
O Aluminum, c = 0.902 J/gºC
Answers
Answer:
a
Explanation:
a
This cell is dividing into two cells.
Answers
Answer:
answer: B or D
Explanation:
hope it helps thanks❤
The correct pathway for air entering the human respiratory system is _______.
A)nose, trachea, alveoli, bronchi
B)nose, bronchi, trachea, alveoli
C)alveoli, trachea, epiglottis, nose
D)nose, trachea, bronchi, alveoli
Answers
Answer: D
Explanation:
The process of nuclear division that produces haploid sex cells is mitosis. Please select the best answer from the choices provided T F
Answers
Answer:
Explanation:
meiosis
Haploid sperm and eggs are produced via meiosis.
7) The negative-feedback system of the endocrine system works much like a ______
Answers
Answer: Most of the hormones released by endocrine system are regulated by negative feedback mechanism.
- Negative feedback mechanism functions to reduce the intensity of original stimulus in order to maintain homeostasis.
Explanation:
When blood calcium levels are decreased, parathyroid gland releases parathyroid hormone (PTH).
PTH acts on bone and stimulate bone resorption by promoting osteoclastic activity. It stimulates reabsorption of calcium in kidneys. PTH promotes calcitriol synthesis that acts on small intestine to increase calcium absorption.
Action of PTH increases blood calcium levels.
When blood calcium levels are increased, thyroid gland releases hormone calcitonin.
Calcitonin opposes PTH and acts to deposit calcium in the bone.
Calcitonin acts on osteoblasts and promote increase in bone mass.
Action of calcitonin decreases blood calcium levels.
What will change if liquid 5.0 molar NiCl2 is added?
Answers
When liquid 5.0 molar NiCl₂ is added to 0.3 M of NiCl₂ solution :
Molarity will increase ( A )
What is Molarity ?
Molarity is the measure of the number of moles of solute present per volume of the solution. The addition of 5.0 molar nickel chloride into a 0.3M Nickel chloride solution will lead to an increase in the number of moles of Nickel chloride present in the solution.
Molarity is directly proportional to moles of solute in a solution therefore the molarity of the solution will increase.
Hence we can conclude that When liquid 5.0 molar NiCl₂ is added to 0.3 M of NiCl₂ solution : Molarity will increase.
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What is the amount of heat, in joules, required to increase the temperature of a 49.5-gram sample of water from 22°C to 66°C?
1) 2.2 x 103^3 J
2) 4.6 10^3 J
3) 9.1 x 10^3 J
4) 1.4 x 10^4 J
Answers
Answer:
3) 9.1 x 10^3 J
Explanation:
Which event is a chemical change?
O a) The paint cracks and chips,
O b) The roof
the car dents
Oc) The baseball strikes the roof.
O d) The exposed metal rusts.
Answers
the periodic table below shows major regions in different colors. which answer choice describes all nonmetals?
A. hydrogen and all of the elements in blue boxes
B. hydrogen and all of the other elements in orange boxes
C. all elements of group 18 in orange boxes
D. all of the elements of period 2 in green boxes
PLS HELP!!
Answers
Answer:
b
Explanation:
because it's more orange in the boxes then others
Which statement best supported by the data on the map
Answers
Which three types of reactions yield a product that is a chemically bonded combination of reactants?
Answers
Answer:
oxidation, synthesis, polymerization.
4. If the relative molecular mass of CH20 is 60.
calculate its empirical formula. (C = 12. H = 1
0 = 16)
A 4
В І
C2
D 3
Answers
Answer:
C2H4O2
Explanation:
because you do mr of CH2O= 12+2+16=30
so 60÷30=2 empirical units
so CH2O × 2=C2H4O2
hope this helps :)
The Empirical formula of the given compound is CH₂O
What is Empirical formula ?A formula giving the proportions of the elements present in a compound but not the actual numbers or arrangement of atoms.
Empirical formula mass = 12g/mol + 2 g/mol + 16 g/mol = 30 g/mol
Molecular formula mass / Empirical formula mass = 60 g/mol / 30 g/mol
= 2
Molecular formula = 2 × CH₂O = C₂H₄O₂
Empirical formula = CH₂O
Empirical formula mass = 12g/mol + 2 g/mol + 16 g/mol = 30 g/mol
Therefore, The Empirical formula of the given compound is CH₂O
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(Help) which of these is correct?
Answers
Explain a polar molecules and give examples
Answers
find the coordinates of the following points
Answers
(
a
,
b
)
is a are the coordinates of a point in Cartesian Plane,
u
is its magnitude and
α
is its angle then
(
a
,
b
)
in Polar Form is written as
(
u
,
α
)
.
Magnitude of a cartesian coordinates
(
a
,
b
)
is given by
√
a
2
+
b
2
and its angle is given by
tan
−
1
(
b
a
)
Let
r
be the magnitude of
(
−
2
,
5
)
and
θ
be its angle.
Magnitude of
(
−
2
,
5
)
=
√
(
−
2
)
2
+
5
2
=
√
4
+
25
=
√
29
=
r
Angle of
(
−
2
,
5
)
=
tan
−
1
(
5
−
2
)
=
tan
−
1
(
−
5
2
)
=
−
68.198
degree
⇒
Angle of
(
−
2
,
5
)
=
−
68.198
degree
But since the point is in second quadrant so we have to add
180
degree which will give us the angle.
⇒
Angle of
(
−
2
,
5
)
=
−
68.198
+
180
=
111.802
⇒
Angle of
(
−
2
,
5
)
=
111.802
=
θ
⇒
(
−
2
,
5
)
=
(
r
,
θ
)
=
(
√
29
,
111.802
)
⇒
(
−
2
,
5
)
=
(
√
29
,
111.802
)
Note that the angle is given in degree measure.
what is the molarity of a solution made by dissolving 18.5 grams of NaCL into enough water to reach 450.0ML
Answers
Answer:
0.702M
Explanation:
Molarity of a solution, which refers to the molar concentration of that solution can be calculated thus;
Molarity = number of moles (n) ÷ volume (V)
Firstly, we convert 18.5 grams of NaCl to moles using the formula; mole = mass/molar mass
molar mass of NaCl = 23 + 35.5 = 58.5g/mol
mole = 18.5/58.5
mole = 0.32moles
Volume of water (V) = 450mL = 450/1000 = 0.450L
Molarity = n/V
Molarity = 0.32/0.450
Molarity = 0.702M
Determine a concentração de 50mL de NaOH que consumiu em sua titulação 80mL de HCl de concentração 1,5mol/L
Answers
Answer:
Given the concentration of HCl is 1.5mol/L or 1.5M
The volume of HCl required is --- 80mL
The volume of NaOH is ---- 50mL
What is the concentration of NaOH-- ?
Explanation:
The chemical reaction between NaOH and HCl is shown below:
[tex]NaOH(aq)+HCl(aq)-> NaCl(aq)+H2O(l)\\1mol of NaOH reacts with 1mol. of HCl.\\Number of moles =molarity * volume in L\\At the equivalence point:\\Number of moles of HCl=number of moles of NaOH\\Hence,\\0.08L* 1.5M =0.05L * C \\=>C=\frac{0.08L* 1.5M}{0.05L} \\=>C=2.4M[/tex]
Answer:
The concentration of NaOH required is 2.4M or 2.4mol/L.
already answered but i would appreciate it if someone checked for me !!
Answers
Answer:
correct
Explanation:
I belve ou got it
bf3 can be octet or not
Answers
Answer:
(BH3 follows the octet rule by dimerizing, as Hadi Kurniawan AR pointed out.) For H and He, an "octet" = 2 electrons. Boron does prefer to follow the octet rule, in that it likes to form borate compounds such as NaBH4. It also is happy to form compounds with elements with lone pairs.
Question 2 of 10
Why is the atomic theory important?
Answers
Answer:
It lead to scientific breakthroughs in chemistry.
Explanation:
How many carbon atoms are there in .500 mol of CO2?
Answers
Answer: There are [tex]3.011 \times 10^{23}[/tex] atoms present in 0.500 mol of [tex]CO_{2}[/tex].
Explanation:
According to the mole concept, there are [tex]6.022 \times 10^{23}[/tex] atoms present in 1 mole of a substance.
In a molecule of [tex]CO_{2}[/tex] there is only one carbon atom present. Therefore, number of carbon atoms present in 0.500 mol of [tex]CO_{2}[/tex] are as follows.
[tex]1 \times 0.500 \times 6.022 \times 10^{23}\\= 3.011 \times 10^{23}[/tex]
Thus, we can conclude that there are [tex]3.011 \times 10^{23}[/tex] atoms present in 0.500 mol of [tex]CO_{2}[/tex].
The closest living relatives to Gorillas are:
(Look at pic)
A. Humans
B. Chimpanzees, and humans equally
C. Orangutans
D. Chimpanzees
(DO NOT ANSWER IF YOU CANNOT ACTUALLY HELP)
Answers
Answer is B
Help I dont know how to do this
Answers
Which of the following issues surrounding nuclear power creates the biggest
concern?
A. Where nuclear power should be used
B. How to deal with the radioactive waste
c. How many power plants should be built
O D. What nuclear power should be used for
Answers
Question : Which issue surrounding nuclear power creates the biggest concern?
Answer : How to deal with the radioactive waste (B)
The following issues surrounding nuclear power that create the biggest concern is What nuclear power should be used for?
What is nuclear power?Nuclear powers are those powers that are produced by nuclear reactions. These reactions include nuclear fission, nuclear fusion, and nuclear decay. Nuclear power is currently in use to produce electricity. The reaction uses uranium and plutonium reaction to produce electricity.
Nuclear power is used for generating electricity, and it is necessary to use the correct radioisotopes to produce electricity.
Thus, the correct option is D. What nuclear power should be used for?
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25 g of NH, is mixed with 4 moles of O, in the given reaction:
4NH,(g) + 50 (8) 4NO(g) + 6H,O(1)
a Which is the limiting reactant?
b What mass of NO is formed?
c What mass of H2O is formed?
Answers
Answer:
a. NH3 is limiting reactant.
b. 44g of NO
c. 40g of H2O
Explanation:
Based on the reaction:
4NH₃(g) + 5O₂(g) → 4NO(g) + 6H₂O(l)
4 moles of ammonia reacts with 5 moles of oxygen to produces 4 moles of NO and 6 moles of water.
To find limiting reactant we need to find the moles of each reactant and using the balanced equation find which reactant will be ended first. Then, with limiting reactant we can find the moles of each reactant and its mass:
a. Moles NH3 -Molar mass. 17.031g/mol-
25g NH3*(1mol/17.031g) = 1.47moles NH3
Moles O2 = 4 moles
For a complete reaction of 4 moles of O2 are required:
4mol O2 * (4mol NH3 / 5mol O2) = 3.2 moles of NH3.
As there are just 1.47 moles, NH3 is limiting reactant
b. Moles NO:
1.47moles NH3 * (4mol NO/4mol NH3) = 1.47mol NO
Mass NO -Molar mass: 30.01g/mol-
1.47mol NO * (30.01g/mol) = 44g of NO
c. Moles H2O:
1.47moles NH3 * (6mol H2O/4mol NH3) = 2.205mol H2O
Mass H2O -Molar mass: 18.01g/mol-
2.205mol H2O * (18.01g/mol) = 40g of H2O
Answer:
a) NH₃ is the limiting reactant
b) 44.1 g NO
c) 39.7 g H₂O
Explanation:
The chemical equation is the following:
4 NH₃(g) + 5 O₂(g) → 4 NO(g) + 6 H₂O(l)
According to the balanced chemical equation, 4 moles of NH₃ reacts with 5 moles of O₂ to produce 4 moles of NO and 6 moles of H₂O.
a) To determine which is the limiting reactant we have to compare the stoichiometric amounts of reactants (NH₃ and O₂) with the actual amounts.
Stoichiometric amounts:
Molecular weight of NH₃= 14 g/mol + (1 g/mol x 3) = 17 g/mol
Stiochiometric amount of NH₃ = 4 moles NH₃ x 17 g/mol = 68 g NH₃
Stiochiometric amount of O₂ = 5 moles
⇒ Stiochiometric ratio = 68 g NH₃/5 moles O₂
Then, we multiply the stoichiometric ratio by the actual amount of O₂ to calculate the required amount of NH₃:
required NH₃ = 4 moles O₂ x 68 g NH₃/5 moles O₂ = 54.4 g NH₃
Thus, we need 54.4 grams of NH₃ to completely react with 4 moles of O₂, but we only have 25 grams of NH₃. Therefore, NH₃ is the limiting reactant.
b) To calculate the amount of NO formed, we use the limiting reactant (NH₃). According to the equation, 4 moles of NH₃ produce 4 moles of NO.
Molecular weight NO = 14 g/mol + 16 g/mol = 30 g/mol
4 mol NH₃ x 17 g/mol = 68 g NH₃
4 mol NO x 30 g/mol = 120 g NO
⇒ Stiochiometric ratio = 120 g NO/68 g NH₃
Now, we multiply the stoichiometric ratio by the actual amount of NH₃ to calculate the mass of NO formed:
NO formed = 25 g NH₃ x 120 g NO/68 g NH₃ = 44.1 g NO
c) According to the chemical equation, 4 moles of NH₃ (68 g) produce 6 moles of H₂O.
Molecular weight H₂O = (2 x 1 g/mol) + 16 g/mol = 18 g/mol
6 mol H₂O x 18 g/mol = 108 g H₂O
⇒ Stoichiometric ratio = 108 g H₂O/68 g NH₃
Finally, we multiply the stoichiometric ratio by the actual amount of NH₃ (limiting reactant) to obtain the mass of H₂O formed:
H₂O formed = 25 g NH₃ x 108 g H₂O/68 g NH₃ = 39.7 g H₂O
