Answer:
(a) H2
Explanation:
ok. write the answer
[tex]{ \qquad\qquad\huge\underline{{\sf Answer}}} [/tex]
The chemical formula for Nascent Hydrogen is :
" H "
what we mean by Nascent hyrogen is a single atom atom of hydrogen, although its not stable. so it tends to form hydrogen gas ([tex]\sf H_2 [/tex]) to gain stability.
2NH3(g) <--> N2(g)+3H2(g)
Which is most likely the effect to the forward reaction if there is an increase in pressure of the system?
The reactant surface area increases.
The reaction rate decreases.
The reaction is not affected at all.
The reaction stops completely.
Answer:
B. The reaction rate decreases.
Explanation:
Name 2 diatomic molecules.
Why does salt give off a colored flame when it is burned? What does the green color barium burns
Answer:
The sodium ion has a stronger affinity for the electron, so more energy is required to move the electron. ... The anion can affect the result of the flame test. For example, a copper(II) compound with a non-halide produces a green flame, while a copper(II) halide yields a blue-green flame
Explanation:
Use the exponential notation to express the physical quantities
(a) V = 15.50 mL to L
Answer:
hdoehdbdjdmsosmebbdxndksnsjsjs
Consider the following reaction:
Fe3+(aq) + SCN-(aq) ↔︎ [Fe(SCN)]2-(aq)
1)Explain what is meant by the term dynamic equilibrium.
2) Write the equilibrium expression for the reaction.
3) The numerical value of Kc at 298K is about 1000 for the reaction. What does this tell you about the position of the equilibrium at 298K?
Answer: In 1860s, Norwegian scientists C. M. Guldberg and P. Waage noted a peculiar relationship between the amounts of reactants and products in an equilibrium. Today, we call this observation the law of mass action. It relates the amounts of reactants and products at equilibrium for a chemical reaction. For a general chemical reaction occurring in solution, aA + bB ⇄ cC + dD the equilibrium constant, also known as Keq, is defined by the following expression: Keq = [C]c/[D]d where [A] is the molar concentration of species A at equilibrium, and so forth. The coefficients a, b, c, and d in the chemical equation become exponents in the expression for Keq. The Keq is a characteristic numerical value for a given reaction at a given temperature. That is, each chemical reaction has its own characteristic Keq. The concentration of each reactant and product in a chemical reaction at equilibrium is related; the concentrations cannot be random values, but they depend on each other. The numerator of the expression for Keq has the concentrations of every product (however many products there are), while the denominator of the expression for Keq has the concentrations of every reactant, leading to the common products over reactants definition for the Keq. Let us consider a simple example. Suppose we have this equilibrium: A ⇄ B .There is one reactant, one product, and the coefficients on each are just 1. The Keq expression for this equilibrium is Keq = [B]/[A]. Exponents of 1 on each concentration are understood. Suppose the numerical value of Keq for this chemical reaction is 2.0. If [B] = 4.0 M, then [A] must equal 2.0 M so that the value of the fraction equals 2.0: Keq = [B]/[A] = 4.0/2.0 =2.0 .By convention, the units are understood to be M and are omitted from the Keq expression. Suppose [B] were 6.0 M. For the Keq value to remain constant (it is, after all, called the equilibrium constant), then [A] would have to be 3.0 M at equilibrium: Keq = [B]/[A] = 60/3.0= 2.0 .If [A] were not equal to 3.0 M, the reaction would not be at equilibrium, and a net reaction would occur until that ratio was indeed 2.0. At that point, the reaction is at equilibrium, and any net change would cease. However, that the forward and reverse reactions do not stop because chemical equilibrium is dynamic.
How many atoms are in 1.4 moles of H3PO4?
8.4 X 10^23 atoms
8.9 X 10^23 atoms
8.4 X 10^23 grams
8.4 X 10^23 moles
8.4 × 10²³ atoms H₃PO₄
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
MolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 1.4 moles H₃PO₄
[Solve] atoms H₃PO₄
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 1.4 \ mol \ H_3PO_4(\frac{6.022 \cdot 10^{23} \ atoms \ H_3PO_4}{1 \ mol \ H_3PO_4})[/tex][DA] Multiply [Cancel out units]: [tex]\displaystyle 8.4308 \cdot 10^{23} \ atoms \ H_3PO_4[/tex]Step 4: Check
Follow sig fig rules and round. We are given 2 sig figs.
8.4308 × 10²³ atoms H₃PO₄ ≈ 8.4 × 10²³ atoms H₃PO₄
Given the following equation formats, which form matches a single replacement
reaction?
O AB + CD → AD + CB
O A+B → AB
O A + BC → AC + B
O AB → A+B
Answer:
The answer is c. A + BC → AC + B
Choose all the answers that apply.
Which of the following increases erosion?
careless farming
crop rotation
leaving fields unplanted
clearing forests
contour plowing
Answer:
1, 3, and 5
Further Information:
Careless farming - increases erosion
Crop rotation - does not increase erosion
Leaving fields unplanted- increases erosion
Clearing forests - does not increase erosion
Contour plowing - increases erosion
Hope this helps and brainliest would be greatly appreciated!!
Weather is caused by the:
mesosphere
stratosphere
troposphere
thermosphere
I WILL MARK BRAINLIST
An insulated lunch bag keeps food warm by
Answer:
slowing the transfer of thermal energy from the air outside the bag
Answer:
D slowing the transfer of thermal energy from the food inside the bag to the air outside the bag
Explanation:
D
Which of the following statements about maintaining a fitness program is ture?
Answer:
im sorry but you havent posted the pic
Explanation:
(55 points) Please help me with my homework please please help me thanks so much
Explanation:
the most important observations is the conversion of electrical energy into light energy which performs the function of a lamp
in addition to this there is considerable amount of energy loss in form of heat energy when the electrical lamp is there is production of a result of this is not converted into light energy
How many grams are in 7.32 x 1023 molecules of potassium carbonate (K2CO3)?
(I leave off the x10^23 because they both will divide out) Use your per
Pl help it’s for a grade I will give Brainly
Answer:
it is c
Explanation:
b,c,a is the decreasing for
10,7,1
Answer:
Answer D: B, C, A
Explanation:
A Newton is measured in kg*m/s^2 and it can be interpreted as "this is how much an object weighing 1kg will accelerate when this much force is applied.
So to get the acceleration, we need to divide the force by the weight.
Object A:
a = 1N / 2kg = 1kg*m/s^2 / 2kg = 0.5m/s^2
Object B:
a = 10N / 8kg = 10kg*m/s^2 / 8kg = 1.25m/s^2
Object C:
a = 7N / 7kg = 7kg*m/s^2 / 7kg = 1m/s^2
So the decreasing order of acceleration is B, C, A
What mass of Fe(OH)3 will be obtained when 100. mL of 0.240 M FeCl3 is mixed with 200. mL of 0.182 M NaOH?
Answer:
648.68 mg
Explanation:
The reaction that takes place is:
FeCl₃ + 3NaOH → Fe(OH)₃ + 3NaClFirst we calculate how many moles of each reactant were added, using the given volumes and concentrations:
FeCl₃ ⇒ 100 mL * 0.240 M = 24 mmol FeCl₃NaOH ⇒ 100 mL * 0.182 M = 18.2 mmol NaOH24 mmol of FeCl₃ would react completely with (24 * 3) 72 mmol of NaOH. There are not as many NaOH mmoles, so NaOH is the limiting reactant.
Now we calculate how many moles of Fe(OH)₃ are formed, using the moles of the limiting reactant:
18.2 mmol NaOH * [tex]\frac{1mmolFe(OH)_3}{3mmolNaOH}[/tex] = 6.07 mmol Fe(OH)₃Finally we convert 6.07 mmol Fe(OH)₃ to grams, using its molar mass:
6.07 mmol Fe(OH)₃ * 106.867 mg/mmol = 648.68 mgThe 129.6 g mass of Fe(OH)₃ will be obtained.
How we calculate mass or weight from moles?Weight or mass of any substance can be calculated from mole as:
n = W/M.
Given chemical reaction is:
FeCl₃ + 3NaOH → Fe(OH)₃ + 3NaCl
According to the question:
Concentration of FeCl₃ = 0.240 M
Volume of FeCl₃ = 100 mL
Concentration of NaOH = 0.182 M
Volume of NaOH = 200 mL
Moles can be calculated by using the formula M = n/V mole/L 0r M = n×1000/V g/mL,
Moles of FeCl₃ = 0.240 × 100 = 0.024 mole
Moles of NaOH = 0.182 × 200 = 3.64 mole
From the stoichiometry of the reaction, it is clear that 3 mole of NaOH i.e. 109.2 moles of NaOH reacts with 1 mole of FeCl₃ to form product. So here NaOH is the limiting agent and responsible for the formation of product. Now we calculate how many moles of Fe(OH)₃ are formed, using the moles of the limiting reactant as follow:
Moles of Fe(OH)₃ = 1/3 × ( 3.64) = 1.21 mole
Finally we convert 12.1 mole Fe(OH)₃ to grams, using its molar mass:
W = 1.21 mole × 106.87 g/mole = 129.6 g
Hence, 129.6 gram of Fe(OH)₃ will be obtained.
To know more about moles, visit the below link:
https://brainly.com/question/14464650
Pl help it’s for a grade I will give you Brainly
Answer:
D. B, C, A
Explanation:
A. For object A, given the following data;
Mass = 2kg
Net force = 1N
To find the acceleration;
Acceleration = net force/mass
Acceleration = 1/2
Acceleration = 0.5m/s²
B. For object B, given the following data;
Mass = 8kg
Net force = 10N
To find the acceleration;
Acceleration = net force/mass
Acceleration = 10/8
Acceleration = 1.25m/s²
C. For object C, given the following data;
Mass = 7kg
Net force = 7N
To find the acceleration;
Acceleration = net force/mass
Acceleration = 7/7
Acceleration = 1m/s²
Therefore, placing the objects in decreasing order, according to the magnitude of the acceleration they are experiencing is B, C, A
Mass is measured based on a unit called the
A. Gram
B. Liter
C.meter
D. Cubic units
Answer:
it's A. Grams
what is the mechanism of action of potassium permanganate as disinfectant ?
Answer:
When applied to your skin, potassium permanganate kills germs by releasing oxygen when it meets compounds in your skin. It also acts as an astringent, which is a drying agent. Some of the conditions that potassium permanganate can help treat include: Infected eczema.
When an ionic solid is added into a solvent, you can see that the ionic solid dissociates into its respective cations and anions. The solvent molecules immediately cluster around the ions. This is known as solvation. When the solvent is water, the solvation process is called hydration. Dissolution and hydration occur simultaneously, and salt is said to be dissolved in water. You can observe that some of the ions dissolved in the solution recrystallize or deposit to form the solid salt. When the rate of dissolution equals the rate of recrystallization (deposition), dynamic equilibrium is reached.
Rank from the first step to the last step.
a. hydration of anions
b. dissolution of salt into its cations and anions
c. hydration of cations
d. rate of dissolution is equal to the rate of deposition
e. hydrated cations and anions begin to deposit as a salt
Answer: See explanation
Explanation:
Based on the information given in the question, the ranking from the first step to the last step goes as follows:
1. Dissolution of salt into cations and anions
2. Hydration of anions
3. Hydration of cations
4. Dissolved cations and anions begin to deposit as a solid salt.
5. Rate of dissolution is equal to the rate of recrystallization.
During which changes of state do atoms that connot move past one another becomes free to move?
a. Vaporization and sublimation
b. boiling and deposition
c. sublimation and melting
d. condensation and melting
Answer:
c. sublimation and melting
Hope it helps...
Have a great day : )
Answer:
Option C is your answer
C. sublimation and melting
Explanation:
hope it helps u ^_^
have a great day/night
12. Which is a disadvantage of using solar or wind energy to produce
electricity?
A. They are controlled energy resources
B. These energy sources are nonrenewable
C. They are an expensive way to produce energy
D. Their ability to produce energy is inconsistent and variable
Answer:
C. or D.
Explanation:
C. Having Solar Energy panels are very expensive
D. Solar Energy can only be produced whenever the sun is out and Wind energy can only be produced when it's a windy day/if there's wind
Consider this reaction mechanism:
Step 1: C4H9Br C4H9+ + Br- (slow)
Step 2: C4H9+ + OH- C4H9OH (fast)
Which rate law is consistent with the mechanism?
What number will go in the _?_ below to balance the equation?
3Gr3V2 + O3 --> 3GrO + __?__V
Question 1 options:
A. 1
B. 2
C. 3
D. 4
E. 5
F. 6
G. 9
Answer:
Option F 6 will be the answer.
rain washing away soil from a hillside
Answer:
deposition
Explanation:
what is organic chemistry?
Answer:
Organic chemistry is the scientific study of the structure, properties, compositions, reactions and synthesis of organic compounds that by definition contains carbon.The organic compounds are molecules composed of carbon and hydrogen and it may contain any number of other elements.
Maybe this was your answer for your question.
When magnesium reacts with oxygen, magnesium atoms lose electrons.
What happens to magnesium in this reaction?
A. It is reduced.
B. It is oxidized.
C. It is decomposed.
D. It undergoes redox.
Answer:
B : it is oxidized .
Explanation:
What is the mass in grams of 1.00 x 10^12 lead (Pb)
atoms?
3.44 × 10⁻¹⁰ g Pb
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 1.00 × 10¹² atoms Pb
[Solve] grams Pb
Step 2: Identify Conversions
Avogadro's Number
[PT] Molar Mass of Pb - 207.2 g/mol
Step 3: Convert
[DA] Set up: [tex]\displaystyle 1.00 \cdot 10^{12} \ atoms \ Pb(\frac{1 \ mol \ Pb}{6.022 \cdot 10^{23} \ atoms \ Pb})(\frac{207.2 \ g \ Pb}{1 \ mol \ Pb})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 3.44072 \cdot 10^{-10} \ g \ Pb[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
3.44072 × 10⁻¹⁰ g Pb ≈ 3.44 × 10⁻¹⁰ g Pb
Answer:
[tex]\boxed {\boxed {\sf 3.44 *10^{-10} \ g \ Pb}}[/tex]
Explanation:
1. Atoms to Moles
Use Avogadro's Number to convert atoms to moles. This number: 6.022*10²³, tells us the number of particles (atoms, molecules, etc.) in 1 mole of a substance. In this case, the particles are atoms of lead.
[tex]\frac {6.022*10^{23} \ atoms \ Pb}{1 \ mol \ Pb}[/tex]
Multiply by the given number of atoms.
[tex]1.00 *10^{12} \ atoms \ Pb *\frac {6.022*10^{23} \ atoms \ Pb}{1 \ mol \ Pb}[/tex]
Flip the fraction so the atoms of lead cancel.
[tex]1.00 *10^{12} \ atoms \ Pb *\frac {1 \ mol \ Pb}{6.022*10^{23} \ atoms \ Pb}[/tex]
[tex]1.00 *10^{12}*\frac {1 \ mol \ Pb}{6.022*10^{23}}[/tex]
[tex]\frac {1.00 *10^{12}\ mol \ Pb}{6.022*10^{23}} = 1.66057788*10^{-12} \ mol \ Pb[/tex]
2. Moles to Grams
Use the molar mass to convert moles to grams. This can be found on the Periodic Table. For lead it is 207.2 grams per mole.
[tex]\frac {207.2 \ g\ Pb}{ 1 \ mol \ Pb}[/tex]
Multiply by the number of moles we calculated.
[tex]1.66057788*10^{-12} \ mol \ Pb* \frac {207.2 \ g\ Pb}{ 1 \ mol \ Pb}[/tex]
[tex]1.66057788*10^{-12}* \frac {207.2 \ g\ Pb}{ 1 }[/tex]
[tex]1.66057788*10^{-12}* {207.2 \ g\ Pb}= 3.44071737*10^{-10} \ g \ Pb[/tex]
3. Round
The original measurement of atoms has 3 significant figures, so our answer must have the same. For the number we calculated, it is the hundredth place. The 0 in the thousandth place tells us to leave the 4.
[tex]3.44 *10^{-10} \ g \ Pb[/tex]
An unknown gas diffuses 0.25 times as fast as He. What is the molecular mass of the unknown gas?
Answer:
64 amu
Explanation:
An unknown gas (X) diffuses 0.25 times as fast as He. Mathematically, we can say that the rate of diffusion of X (rX) is 0.25 that of He.
rX = 0.25 rHe
rX/rHe = 0.25
Given the molecular mass of He (MHe) is 4.00 amu, we can calculate the molecular mass of X using Graham's law of diffusión.
rX/rHe = √(MHe/MX)
0.25 = √(4.00 amu/MX)
MX = 64 amu
You dissolve 0.47 g of potassium chloride (KCl) in 700 ml of water.
What is the molarity of the solution?
(From the periodic table: 1 mol K = 39.10 g; 1 mol Cl = 35.453 g)
Enter the value rounded to three decimal places with no units
Will give BRAINLEst
Answer:
0.009
Explanation:
Molarity, a measure of molar concentration of a substance is calculated thus;
Molarity = number of moles ÷ volume
According to the provided information, mass of KCl = 0.47g, volume of water = 700ml
Using mole = mass/molar mass
Molar Mass of KCl = 39.10 + 35.453
= 74.553g/mol
Mole = 0.47/74.55
Mole = 0.0063mol
Volume of water = 700ml = 700/1000 = 0.7L
Molarity = 0.006/0.7
Molarity = 0.00857
The value of molarity rounded to three decimal places (3 d.p) = 0.009
_Na+ Cl2 - -> _NaCl
A 2,4
B 1,2
C 3,3
D 2,2
Answer:
D 2,2
Explanation:
We can see that there are 2 chlorines on the reactant side so there has to be a 2 on the product side
Now we have Na + Cl2 --> 2NaCl
The problem now is that there are 2 sodiums on the product side so add a 2 to the Na on the reactant side
2Na + Cl2 --> 2NaCl
Now it's balanced!