Answer:
Topographical is the correct ans
10) the three factors that affect the rate of weathering are:
A.climate, color, and air quality
B. climate, type of rock and pollution
C. climate, luster of rock, and pollution
Consider the reaction between NaOH (aq) and H2SO4(aq). 1) Please write the balanced reaction equation.
2) What is the concentration of the sodium hydroxide solution if 25.0 mL of it required 15.8 mL of a 0.350 M sulfuric acid for complete reaction?3) What is the concentration of the sodium hydroxide solution if 25.0 mL of it required 15.8 mL of a 0.350 M sulfuric acid for complete reaction?
4) If 14.0 mL of a 1.250 M sodium hydroxide solution and 25.0 mL of a 1.10 M phosphoric acid were reacted, what is the theoretical mass, in g, of the water produced?
Answer:
Explanation:
2NaOH + H₂SO₄ = Na₂SO₄ + 2H₂O .
2 ) 15.8 mL of .35 M sulphuric acid will contain .35 x .0158 moles of sulphuric acid
= .00553 moles
1 mole of H₂SO₄ reacts with 2 moles of NaOH
.00553 moles of H₂SO₄ will react with 2 x .00553 moles of NaOH
= .01106 moles
.01106 moles were contained in 25 mL
so concentration of NaOH = .01106 / .025
= .4424 M .
4 )
3NaOH + H₃PO₄ = Na₃PO₄+ 3H₂O .
14 mL of 1.25 M NaOH will contain .014 x 1.25 moles = .0175 moles
25 mL of 1.1 M phosphoric acid = .025 x 1.1 moles = .0275 moles
.0275 moles of phosphoric acid will require triple moles of NaOH , but it is in short supply . So NaOH is limiting reactant .
water formed = .0175 moles .
= .0175 x 18 grams of water
= .315 grams .
What properties does Chlorine have on its own?
Answer:
When isolated as a free element, chlorine takes the form of a greenish-yellow gas, which is 2.5 times heavier than air and smells like bleach. Chorine is the second-most-abundant halogen and the second-lightest halogen on Earth, after fluorine
Explanation:
Which of the following are excited in ultraviolet photoelectron spectroscopy?
A. Core electrons
B. Nonvalence electrons
C. X-rays
D. Valence electrons
Answer:
D. Valance Electrons
Explanation:
2. What are instrument strings made of now?
Answer: They are made of nylon, steel or sometimes gut.
Explanation:
Calculate the pH of the resulting solution if 32.0 mL of 0.320 M HCl(aq) is added to (a) 42.0 mL of 0.320 M NaOH(aq). (b) 22.0 mL of 0.420 M NaOH(aq).
Answer:
a) pH = 11.5
b) pH= 3
Explanation:
a) lets calculate the number of moles of each reactant
moles of HCl = 32/1000 * 0.32 = 0.01024 mole
moles of NaOH = 42/1000 * 0.32 = 0.01344 moles
1 moles of HCl reacts with 1 moles of NaOH , so 0.01024 mole of HCl should react with 0.01024 moles of NaOH , but there is some excess NaOH.
excess NaOH= 0.01344 -0.01024 = 0.0032 moles
[H+]= [tex]\frac{10^{-14} }{0.0032} = 3.125 *10^{-12}[/tex]
pH= -log [3.125*10^-12) = 11.5
b) moles of NaOH = 0.00924
excess HCl present = 0.01024 - 0.00924 =.001
so excess [H+] = 0.001
pH= -log( 0.001) = 3
Define and give an example of each of Law of Conservation of Mass
Answer:
The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted.
Explanation:
That is what I think on the subject
What does the main difference between protons and neutrons
Answer:
The main difference is that neutrons are neutral while protons are positive.
Explanation:
Neutrons have nor charge and protons have a positive charge. Hope this helps!
Answer:
Protons: Determine the element
Neutrons: Is for the Average atomic mass or AMU for short.
Explanation:
2. Which property would help to determine whether matter is a solid or a liquid?
a. volume
b. color
C.shape
d.Mass
Answer:
A
Explanation:
Volume will help you determine whether is a solid or a liquid.
Have a great day
1.3188g of antacid is weighed and mixed with 75.00 mL of excess 0.1746 M HCl. The excess wcid required 27.20 mL of 0.09767 M NaOH for back titration. Calculate the amount of CaCO3 in the tablet.
The amount of CaCO₃ in the tablet : 0.5219 g
Further explanationReaction
1. CaCO₃(in antacid) + 2HCl⇒ CaCl₂+H₂CO₃
2. Titration ⇒ HCl+NaOH⇒NaCl+H₂O
Reaction 2For titration :
M₁V₁.n₁=M₂V₂n₂(n=acid/base valence⇒NaOH/HCl=1)
mol HCl=mol NaOH = excess HCl
[tex]\tt 27.2\times 0.09767=2.657~mlmol[/tex]
Reaction 1mol HCl
[tex]\tt 75\times 0.1746=13.095~mlmol[/tex]
Moles of HCl used (reacted with CaCO₃) :
initial HCl - excess HCl =
[tex]\tt 13.095-2.657=10.438~mlmol=0.010438~mol[/tex]
From reaction 1 :
mol HCl : mol CaCO₃ = 2 : 1
[tex]\tt mol~CaCO_3=\dfrac{1}{2}\times 0.010438=0.005219[/tex]
mass of CaCO₃ :
[tex]\tt 0.005219\times 100~g/mol=0.5219~g[/tex]
What is the mass percentage of carbon in 5.000 g of sucrose? 50.00 g of sucrose?
500.0 g of sucrose? Explain.
Answer:
first you have to know the molecular formula of carbon which is C12H22O11, Then with that you can calculate the mass of each element in the molecule. C:12.01*12= 144.12, H: 1.008*22= 22.176, O: 16*11= 176
Explanation: give me brainliest pls
which of these phrases best describes an ecosystem
Answer:
all the living organisms in a specific location 2. ...
Identify some biotic factors in the diagram.
Identify some biotic factors in the diagram.
Identify some biotic factors in the diagram.
Identify what this diagram represents? ...
Give one effect that an increase in the minnow population would have on the ecosystem.
What type of bonding would be expected in argon?
Answer:
Argon is a member of the noble gas family of elements. This means that it already has eight valence electrons in its outermost shell. Because of this, Ar rarely bonds with other atoms to form compounds
Explanation:
If, in a particular process, reactants are able to form products, and products are also able to form reactants, then this process may be described as:_________. A. a reversible process. B. an elementary process. C. at equilibrium. D. forbidden. E. a forward process.
Answer:
A. Reversible Process
Explanation:
Going through the meaning of the options we have;
A Reversible: This reaction involves a backward and forward step.. This means that reactant would react to form products and products in turn wold react to form reactants. This is the correct option.
B. Elementary process: This refers to a single step reaction with a single transition state and no intermediates. This option is wrong because that is not what the question says.
C. Equilibrium Reaction: This refers to a reaction in which there is no change in the concentration of the reactants and products. Rate of forward reaction is equal to the rate of backward reaction.
D. Forbidden Reaction: This is not the correct option.
E. Forward process: This refers to the reaction that involves reactants reacting to form products. This is also not correct as the question states that the products are also able to form reactants.
Which property is NOT a physical property?
Melting Point
Color
Ability to Burn
Density
Answer:
im pretty sure color is the right one
Answer: Ability to Burn
Explanation: I TOOK THE TEST
Which of the following compounds has the lowest vapor pressure at 25°C?
a.
CH3CH2CH3
b.
CH3OCH3
c.
CH3OHCH2OH
d.
CH3CH2CH2Cl
e.
CH3CH2CH2CH3
CH₃CH₂CH₃ is a compound which has lowest vapor pressure at 25°C as it is a small chain compound without any functional group or substituent present in it.
What is a compound?Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
Learn more about compound,here:
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Methane is a major component of natural gas, which is used as a fuel in homes.Write a balanced equation for the complete oxidation reaction that occurs when methane (CH4) burns in air.
Answer:
CH4(g) + 2O2(g) --> CO2(g) + 2H2O(g)
Explanation:
Methane is an hydrocarbon. Whenever hydrocarbon undergoes a reactio with oxygen, the products formed are carbon(iv) oxide and water.
The equation of the reaction is given as;
CH4 + O2 --> CO2 + H2O
Upon balancing the equation, we have;
CH4(g) + 2O2(g) --> CO2(g) + 2H2O(g)
In the process of eating, what kind of energy in food is transformed into heat energy by your body?
chemical energy
light energy
mechanical energy
Answer:The chemical energy
Explanation:because The chemical energy in the food you eat is changed into another kind of chemical energy that your body can use. Your body then uses that energy to give you the kinetic energy that you use in everything you do.
Answer:
c i think
Explanation:
If an athlete weighs 159 lb and has 15.0% % body fat by weight, how many pounds of fat does the athlete's body contain?
Answer:
23.85
Explanation:
is over of percent over 100
[tex]\frac{x}{159}[/tex]x[tex]\frac{15}{100}[/tex]
15 x 159 = 2385
2385 ÷ 100 = 23.85
If an athlete weighs 159 lb and has 15.0% % body fat by weight, the athlete's body contains approximately 23.84 pounds of fat.
To calculate the number of pounds of fat in the athlete's body, we can use the following steps:
Convert the athlete's weight from pounds to kilograms:
159 lb × 0.4536 kg/lb = 72.1224 kg
Calculate the weight of the athlete's body fat:
72.1224 kg × 0.150 = 10.81836 kg
Convert the weight of body fat from kilograms to pounds:
10.81836 kg × 2.2046 lb/kg = 23.8447 lb
Therefore, the athlete's body contains approximately 23.84 pounds of fat.
Learn more about fats here:
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Which type of weathering causes the mineral composition of rocks to change?
Chemical weathering
General weathering
Mechanical weathering
Permeable weathering
Answer: chemical weathering
Explanation: Chemical weathering is different from mechanical weathering because the rock changes, not just in size of pieces, but in composition. That is, one type of mineral changes into a different mineral. Chemical weathering works through chemical reactions that cause changes in the minerals.
Answer:
I am not very sure but I think it's chemical weathering
what star sign would you be if you were born on 1st January?
What is the orbital or electronic geometry of a molecule with 0 nonbonding electron pairs and 2 bonding electron pairs?
What are three examples of matter you can see where you are right now. Thanks for the help everyone!
Answer: So you are matter, the apple, water, a computer etc.
Explanation: matter is anything that takes up space
Which of the following occurs in an ionic bond? *
O Oppositely charged ions attract.
OTwo atoms share two electrons.
Two atoms share more than two electrons.
Like-charged ions attract.
Answer:
Oppositely charged ions attract.
Explanation:
In an ionic bond oppositely charged ions attracts one another by electrostatic attraction.
To form ionic bonds, chemical species must lose or gain electrons. Most metals will lose their electrons due to electropositive nature. Non-metals gains the electrons. When a substance lose electrons, it becomes positively charged. A non-metal gaining electrons becomes negatively charged. The attraction between these two species forms the ionic bond.When 1.365 g of anthracene, C14H10, is combusted in a bomb calorimeter that has a water jacket containing 500.0 g of water, the temperature of the water increases by 25.89°C. Assuming that the specific heat of water is 4.18 J/(g ∙°C), and that the heat absorption by the calorimeter is negligible, estimate the enthalpy of combustion per mole of anthracene.
The law of conservation of energy can be applied to heat changes, i.e. the heat received/absorbed is the same as the heat released
Q in = Q out
Heat can be calculated using the formula:
Q = mc∆T
Heat released by anthracene= Heat absorbed by water
Heat absorbed by water =
[tex]\tt Q=500\times 4.18\times 25.89=54110.1~J[/tex]
mol of anthracene (MW=178,23 g/mol)
[tex]\tt \dfrac{1.365}{178.23}=0.00766[/tex]
The enthalpy of combustion per mole of anthracene :
[tex]\tt \Delta H=-\dfrac{Q}{n}=\dfrac{54110.1}{0.00766}=-7063981.7~J/mol\approx -7064~kJ/mol[/tex]
NaF +
A.
Br2
NaBr
+
F2
Na=
F=
Na=
F=
1. Use equation A to choose the correct coefficients from the answers below:
a. 2,1,2,1
b. 3,2,1,1
c. 1,2,2,1
d. 2,3,1,1
2. Use Equation A to identify the type of reaction:
a. Synthesis
b. Decomposition
c. Single Displacement
d. Double Displacement
B.
K +
Cl2
КСІ
K=
CI=
K=
CI=
3. Use equation B to choose the correct coefficients from the answers below:
a. 3,1,2
b. 2,1,3
c. 2,1,2
d. 1,2,1
Answer:
1. 2121
2. i have no idea
3. 212
Explanation:
Is this true or false? :D
Answer:
true i am pretty sure
Explanation:
the ans. is false (:) ok
what is the combustion reaction for CH3OH(l)
Answer:
CH3OH(l) + 3 2 O2(g) → CO2(g) + 2 H2O(l
Explanation:
.
While hiking in the Everglades, Melissa finds the fossil of a clam in a rock. In which type of rock would you most likely find a fossil?
Please answer this :)
Answer:
Sedimentary
Explanation:
Describe how this instrument works.
Operation:
Answer:
It amplifies the picture of something far away.
Explanation:
Answer:
Light from the moon reflects from large mirror, bent by small mirror, focused at focal point, magnified by eyepeice.
Explanation:
