Answer:
340 N
Explanation:
Force formula
The force formula is defined by Newton's second law of motion: Force exerted by an object equals mass times acceleration of that object: F = m ⨉ a. To use this formula, you need to use SI units: Newtons for force, kilograms for mass, and meters per second squared for acceleration.
Equilibrium
It is a state of rest or balance due to the equal action of opposing forces. equal balance between any powers, influences, etc.; equality of effect. mental or emotional balance; equanimity: The pressures of the situation caused her to lose her equilibrium.
As CaCl2 dissolves in water, and warms the solution,
a. delta H is positive, and delta S is negative
b. delta H is negative, and delta S is negative
c. delta H is negative, and delta S is positive
d. delta H is positive, and delta S is positive
As [tex]CaCl_{2}[/tex] dissolves in water, and warms the solution, delta H is negative, and delta S is positive.
What are exothermic and endothermic reactions?Chemical reactions that release energy are called exothermic. In exothermic reactions, more energy is released when the bonds are formed in the products which is used to break the bonds in the reactants. Chemical reactions that absorb (or use) energy are called endothermic.
The dissociation of [tex]CaCl_{2}[/tex] in water is
[tex]CaCl_{2}+H_{2}O(l)=Ca_{++}+2Cl_{-}+H_{2}O(l)[/tex]
As the solution is warm, change in Enthalpy is exothermic ΔH < 0.
(ΔH is negative, so the dissociation is exothermic).
As there are produced 2 ions from 1 solid molecule, the disorder is increasing and ΔS > 0
Hence, option C is correct.
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For lunch today, I ate an apple. What type of carbohydrate did I ingest?
Answer:
Monosaccharide
Explanation:
Apples contain high levels of fructose, which is a monosaccharide.
2NH3(g)+3CuO(s)= + 3H2O(I)+N2(g)
If a sample of 51.0g of ammonia's reacted with excess copper oxide, how many moles of nitrogen would be produced?
Answer:
1.50 mol N₂
Explanation:
Step 1: Write the balanced equation
2 NH₃(g) + 3 CuO(s) ⇒ 3 Cu + 3 H₂O(I) + N₂(g)
Step 2: Calculate the moles corresponding to 51.0 g of NH₃
The molar mass of NH₃ is 17.03 g/mol.
51.0 g × 1 mol/17.03 g = 2.99 mol
Step 3: Calculate the moles of N₂ produced from 2.99 moles of NH₃
The molar ratio of NH₃ to N₂is 2:1. The moles of N₂ produced are:
2.99 mol NH₃ × 1 mol N₂/2 mol NH₃ = 1.50 mol N₂
Oxygen has a total of 8 electrons, does that satisfy the octet rule? Explain why or why not.
Answer:
No
Explanation:
The first 2 electrons are in the inner shell, and the other 6 are valence electrons. Oxygen needs 2 more electrons to fill its valence shell and satisfy the octet rule.
calculate the molar mass of sodium carbonate
Answer:
Explanation:
105.9888 g/mol
Answer:
105.9888 g/mol
Explanation:
You will add both the molar mass of each element multiply by the number of atoms present.
When 565g of a metal with temperature of 90.00 C added to 200.0 g of water at 25.00 degrees. Assuming all the heat lost by the iron is transferred to the water ( specific heat capacity of water = 4/18 J/(g-C)), and the final temperature of the mixture is 34.40 degree Celsius what is the heat capacity of the metal?
Answer:
The specific heat is 0.25J/g°C
Explanation:
To solve this question we must know that the heat released for the metal is equal to the heat absorbed for the water. The equation is:
S(Metal)*m(Metal)*ΔT(metal) = S(water)*m(water)*ΔT(water)
Where S of metal is our incognite (Specific heat of metal)
m is the mass of the metal = 565g
ΔT is change in heat of the metal = 90.00°C - 34.40°C = 55.60°C
Specific heat of water = 4.18J/g°C
The mass of water = 200.0g
ΔT of water is 34.40°C - 25.00°C = 9.40°C
Replacing:
S(Metal)*565g*55.60°C = 4.18J/g°C*200.0g*9.40°C
S(metal) = 0.25J/g°C
The specific heat is 0.25J/g°C
what is the acceleration of a 100kg object being pushed with a force of 1000 newton's
Answer:
the person that answered it with the link, dont click it's a virus
Explanation:
1)
Steel Wool Experiment
Before
Observations
After
Observations
Appearance
Steel wool dark gray,
Balloon deflated
Appearance
Steel wool dark
brown; Balloon
inflated
Mass (9)
485.68
Mass (9)
The students data can be seen here. A chemical reaction clearly took
place in the flask. One entry is missing: the mass of the system at the
end of the experiment. What amount should be added to the data
table?
Answer:
Chemical reactions, chemistry, science as inquiry and data analysis. ... Students burn steel wool in both an open and closed environment to understand ... The difference in mass for this small sample of steel wool will be very small. ... careful attention to the balloon! 9. When rusting occurs the properties of the metal changes.
Explanation:
Explain Lewis electron dot formula of H, O, N, H2, O2, and N2
Answer:
For a hydrogen atom, H which has only one valence electron, the Lewis electron dot formula is with a single dot on the H atom.
For oxygen atom which has six valence electrons, the Lewis electron dot formula is shown with six dots around the O atom
For nitrogen atom with five valence electrons, the Lewis electron dot formula is shown with five dots around the N atom
For the hydrogen gas molecule, the Lewis electron dot formula is shown with two dots between the two H atoms which represents the bonding electrons.
For the oxygen gas molecule, the Lewis electron dot formula is shown with four dots between the two O atoms which represents the bonding electrons, and four other dots on each atom which represents the non-bonding electrons
For the nitrogen gas molecule, the Lewis electron dot formula is shown with six dots between the two N atoms which represents the bonding electrons, and two other dots on each atom which represents the non-bonding electrons
Explanation:
Lewis electron dot structures are structural formulas for molecules and polyatomic ions that represent all valence (outermost shell electrons involved in bonding with other atoms of the same or different elements) electrons in an atom of an element. It shows the bonding between atoms of a molecule, as well as the lone pairs of electrons that may exist in the molecule. These electrons are represented with dots around the atom, thus the name Lewis electron dot formula.
The Lewis electron dot formula for the given atoms and molecules are explained below:
For a hydrogen atom, H which has only one valence electron, the Lewis electron dot formula is with a single dot on the H atom.
For oxygen atom which has six valence electrons, the Lewis electron dot formula is shown with six dots around the O atom
For nitrogen atom with five valence electrons, the Lewis electron dot formula is shown with five dots around the N atom
For the hydrogen gas molecule, the Lewis electron dot formula is shown with two dots between the two H atoms which represents the bonding electrons.
For the oxygen gas molecule, the Lewis electron dot formula is shown with four dots between the two O atoms which represents the bonding electrons, and four other dots on each atom which represents the non-bonding electrons
For the nitrogen gas molecule, the Lewis electron dot formula is shown with six dots between the two N atoms which represents the bonding electrons, and two other dots on each atom which represents the non-bonding electrons
how is the air in tube 4 kept out of contact with the nail
Answer:
If you ever wonder why nails rust, it's because rusting happens when a metal is exposed to oxygen. The molecules of iron on the surface of the nail exchange atoms with the oxygen in the air and produce a new substance, the reddish-brown ferrous oxide, a.k.a. rust.
Explanation:
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The fluorine-17 nuclide radioactively decays by electron capture.
Answer: daughter nucleus is Oxygen-17
Explanation: electron and proton form a neutron in nucleus.
Mass number remains same and number of proton decreases.
Fluorine -17 isotope undergoes nuclear decay by electron capture results in the formation of the oxygen-17 nuclei and one neutron as written below:
[tex]\rm _{9}^{17}F + _{-1}^{0}e \rightarrow _{9}^{1 7}O + _{0}^{1}n[/tex]
What is nuclear decay?Unstable radioactive isotopes of some elements undergoes breaking their nuclei by emitting or absorbing some charged particles such as alpha or beta.
Alpha decay result in the emission of one helium nuclei where, the mass number reduces by 4 units and atomic number by 2. In beta decay mass umber does not change but atomic number increases by one.
The process of electron capture, is the bombardment of an electron into the unstable nucelli result where the atomic number reduces by one. Therefore, fluorine converts to oxygen -17 by electron capture where the latter isotope is stable one.
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Your question is incomplete. But your complete question probably was:
Fluorine-17 nuclide radioactively decays by electron capture. Write a balanced nuclear chemical equation that describes this process.
What is the pH of a solution with [OH-]=0.0004? (Show your work)
NO LINKS
Please help
Answer:
10.6
Explanation:
We'll begin by calculating the pOH of the solution. This can be obtained as follow:
Concentration of Hydroxide ion [OH¯] = 0.0004 M
pOH =?
pOH = –Log [OH¯]
pOH = –Log 0.0004
pOH = 3.4
Finally, we shall determine the pH of the solution. This can be obtained as follow:
pOH = 3.4
pH =?
pH + pOH = 14
pH + 3.4 = 14
Collect like terms
pH = 14 – 3.4
pH = 10.6
Thus, the pH of the solution is 10.6
Please help with completing number 5
Answer:
D.
Explanation:
NH3 (Ammonia) is a water soluble gas, and is polar. While C6H14 is non-polar and does not mix with water soluble.
Consider an atom that has an electron in an excited state. The electron falls to a lower energy level. What effect does that have on the electron?
Answer:
On returning to lowest energy state which is stable, it releases energy in the form of light. Hence, option A that is the electron releases energy in the form of light on falling to lower energy state from excite state.
What is the molarity of a Sodium Chloride solution if 86.00g of NaCl was dissolved in enough water to form 1000.mL of solution?
Answer:
1.47 M
Explanation:
First we convert 86.00 g of NaCl into moles of NaCl, using the molar mass of NaCl:
86.00 g ÷ 58.44 g/mol = 1.472 mol NaClThen we convert 1000 mL into liters:
1000 mL / 1000 = 1.0 LFinally we can calculate the molarity of the solution:
Molarity = moles / liters1.472 mol / 1.0 L = 1.472 M1 point C3Hg(g) + 5 O2(g) → 3 CO2(g) + 4H2O(g)
If 0.678 g of propane (C3Hg) are used in the reaction, how many liters of oxygen gas are required to react completely at STP?
Molar mass of C3Hg = 44.11 g/mol
0.077 L
1.72 L
75.9L
0.015L
Answer: 1.72
Explanation:
help help help help
Answer:
2,4,6–trimethylheptanal
Explanation:
To name the compound given, we must first obtain the following:
1. Determine the functional group of the compound.
2. Determine the longest continuous carbon chain. This gives the parent name of the compound.
3. Identify the substituent group attached to the compound.
4. Locate the position of the substituent group.
5. Combine the above to obtain the name of the compound.
Now, we shall name the compound as follow:
1. The functional group of the compound is –CHO. Thus, the compound is an alkanal.
2. The longest continuous carbon chain is 7. Thus, the parent of the compound is heptanal.
3. The substituent group attached to the compound is methyl (–CH₃).
NOTE: There are 3 methyl groups attached to the compound.
4. The methyl groups attached to compound are located at carbon 2, 4 and 6.
5. Therefore, the name of the compound is:
2,4,6–trimethylheptanal
PLEASE HELP !! ILL GIVE BRAINLIEST !! 100 POINTS
IF YOU KNOW CHEMISTRY OR BIOLOGY
In this reaction diagram, which part represents the difference in energy
between the reactants and the products?
Potential energy
HA
Reaction progress
Answer:
Option D. G
Explanation:
In the energy profile diagram, the difference in the energy between reactant and product is called enthalphy Change (ΔH).
Mathematically, the enthalpy change (ΔH) is represented as:
Enthalpy change (ΔH) = Heat of product (Hₚ) – Heat of reactant (Hᵣ)
ΔH = Hₚ – Hᵣ
Considering the diagram given in question above, the difference in the energy of product and reactant is indicated by the letter G
Thus, option D gives the correct answer to the question.
20 POINTS PLEASE ANSWER
In the following reaction, if you wanted to produce more hydrochloric acid (HCl), what should you do? (2 points)
4HCl + O2 ⇄ 2H2O + Cl2
Select one:
a. Add more H2O
b. Add more O2
c. Remove H2O
d. Remove Cl2
Answer:
Add more H2O
Explanation:
Consider the following reaction
X + Al(NO3)3 (aq) → X(NO3)y (aq) + Al(s)
Using the provided Activity Series of Elements, determine which of the following elements could be X.
a. Copper b. Lead c. Iron d. Calcium
Answer: Calcium
Explanation: an element need to reduce Iron in reaction.
Calcium is only metal in list which can reduce Iron
What is the meaning of a null hypothesis being rejected?
The hypothesis is definitely correct.
The hypothesis might be correct.
The hypothesis is false.
The null hypothesis is correct.
Answer:
the hypothesis is false
Explanation:
it I rejected because the hypothesis has been tested severally and the answer still proves to be wrong
Answer:
probably the third option: The hypothesis is false
Explanation:
Someone please help !!!!!
Sodium chromate can be prepared by oxidizing a chromium(III) salt with sodium peroxide in alkaline
solution. The chromium(III) ions are oxidized to chromate ions. The peroxide ions are reduced to hydroxide
ions. Write down unbalanced half reaction equations and a balanced overall equation for the reaction.
The physical states of all the reagents and products must be shown throughout.
Here's link to the answer:
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Consider these two entries from a fictional table of standard reduction potentials.
X3++3e−⟶X(s)o=−2.11 V
Y3++3e−⟶Y(s)o=−0.22 V
What is the standard potential of a galvanic (voltaic) cell where X is the anode and Y is the cathode?
ocell=
V
Answer:
1.89 V
Explanation:
To calculate the standard cell potential, subtract the reduction potential of the anode from the reduction potential of the cathode.
So for your calculation,
-0.22 V - (-2.11 V)= 1.89 V
In the voltaic cell, current is produced by a sponteanous chemical reaction. The standard cell potential here is 1.89 V.
What is a voltaic cell?A voltaic cell is a cell that produces current by a sponteanous chemical reaction. We are told here that X is the anode and Y is the cathode.
Now;
E°cell = E°cathode - E°anode
E°cell = (−0.22 V) - (−2.11 V) = 1.89 V
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what is ionisation energy
Answer:
minimum energy required to to remove the most loosely bound election of an isolated gaseous atom.
Explanation:
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The blank
and the blank
of atoms are the same on both sides of a chemical equation.
Answer:
which states that matter cannot be created or destroyed. Therefore, there must be the same number of atoms of each element on each side of a chemical equation.
Explanation:
Which best explains why ionization energy tends to decrease from the top to the bottom of a group? The number of orbitals decreases. The number of neutrons decreases. Electrons get closer to the nucleus. Electrons get farther from the nucleus.
Answer:
Electrons get farther from the nucleus.
Explanation:
By going from the top to the bottom of a group, the atomic number increases. That would mean that:
The number of orbitals increases, as there are more electrons.A higher atomic number implies an increasing number of neutrons.As there are more electrons, they get farther from the nucleus. The farther an electron is from the nucleus, the easier it is for the electron to be removed from the atom.Ionization energy decreases down the group because electrons get farther from the nucleus hence they are easier to remove.
Ionization energy refers to the energy required to remove an electron from an atom. The ionization energy is a periodic trend that decreases down the group but increases across the period.
The ionization energy decreases down the group because electrons get farther from the nucleus hence they are easier to remove.
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HELP HELP HELP HELP!!!!!!!
Answer:
About 200 moles water
Explanation:
O2 is the limiting reactant, and it allows for 193.75 moles of water to be produced. Good luck on your assignment!
What mass of Ca(OH)2 will be used to make 45.6g of NaOH?
NaCl + Ca(OH)2 -> NaOH + CaCl2
2 NaOH+ CaCl2-> 2 NaCl+ Ca(OH)2
How many moles of NaPh are produced when 26.9 of NaCl are used?
How many moles of fluorine will be needed to produce 5.6 g of HF?
H2+F2-> HF
Answer is in a photo. I can only upload it to a file hosting service. link below!
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Calculate mass in grams in 2.28 mol of h2so4
Answer:
224g
Explanation:
Molar mass of h2so4:
1.008x2+32.06+16.00x4=98.08g/mol
2.28 x 98.08=224g