The description that correctly describes the acidity or the basicity of a solution is that:
The higher the pH is, the more the hydroxide ion concentration increases and the more basic the solution becomes.
How is the pH determined?The pH of a solution is determined by the strength of the acid and the base pair. Both of these are dependent on the same chemical reaction.
As the pH rises, the the hydroxide ion is increased in concentration and the solution gets to be more basic.
acidity -the amount of H+ ions can be produced by a compound determines the acidity
pH range:less than 7
acidity increase with decrease in pH number
basicity- the amount of OH- ion can be produced by a compound determines basicity
pH range : 8 to 14
7 is neutral
Basicity increases with increase in number.
Therefore the higher the pH is, the more the hydroxide ion concentration increases and the more basic the solution becomes.
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Use the following equation to answer questions : 2 C6H10 + 17 O2 12 CO2 + 10 H2O a) If I do this reaction with 35 grams of C6H10 and 45 grams of oxygen, how many grams of carbon dioxide will be formed? b) What is the limiting reagent? ___________ c) How much of the excess reagent is left over after the reaction is finished? d) If 35 grams of carbon dioxide are actually formed from the reaction, what is the percent yield of this reaction?
The answers of every subquestion is given below:
What is percentage yield ?
Percent yield of the reaction is the percent ratio of actual yield to the theoretical yield.It is calculated to be the experimental yield divided by theoretical yield multiplied by 100%.
The theoretical yield is the amount predicted by a stiochiometric calculation based on the number of moles of all reactants present.
This calculation assumes that only one reaction occurs and that the limiting reactant reacts completely.
The actual yield is the quantity of a product that is obtained from a chemical reaction.
2 C₆H₁₀ + 17 O₂ ⇒ 12 CO₂ + 10 H₂O
1. When you do this calculation for 35 grams of C₆H₁₀, you find that 113 grams of CO2 will be formed.
When you do the calculation for 45 grams of oxygen,You find that 43.7 grams of CO2 will be formed.Because 43.7 grams is the smaller number forming 43.7 grams of product.
2. Oxygen is the limiting reagent
3. 21.4 grams of C₆H₁₀ will be left over.
4. 80.1%
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11. How much heat is required to raise the temperature of a 25 gram block of wood from
20 °C to 25 °C?
Answer:
Keep the pace of 5 C up until you get to about 60 C. Than Measure the totl amount of heat added to the factor of these numbers.
Explanation:
100 POINTS!!!
What coefficient must I add to the product to balance the following equation?
La2O3 + 3H2O --> La(OH)3
A: 2
B: 3
C: 1
D: it is balanced as it
Coefficient A: 2 must be added to the product to balance the equation.
What is a chemical equation?a chemical equation is a representation of elements taking part in chemical reactions.in a chemical reaction, all elements are written with their physical state.Law of a chemical equationThe mass of the reactant side is always equal to the mass of the reactant side.
To balance the chemical equation coefficient is added to make the number of atoms equal on both sides.
La₂O₃+ 3H₂O => 2La(OH)₃
Left-hand side of atoms is equal to right-hand side La=2
O=6
H =6
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2. Which of the following elements does not lose an electron easily? (a) Na (6) F (c) Mg (d) Al
Answer:
Answer: (b) F
Explanation:
Sodium has 1, magnesium has 2 and Aluminium has 3 electrons in its outermost shell whereas Fluorine has 7 electrons in its outermost shell hence Fluorine does not lose electrons easily.
The electronic configuration of fluorine is 2,7.
Fluorine is the ninth element with a total of 9 electrons.
The first two electrons will go in the 1s orbital.
The next 2 electrons for F go in the 2s orbital.
The remaining five electrons will go in the 2p orbital. Therefore the F electron configuration will be 1s22s22p5.
I will give Brain list and lot of points
Answer: gugygy
Explanation:
20. What is the name of the compound?
0 3,1 diethylcyclopentane
O 1, 3 dimethylcyclopentane
0 1,3 diethylcyclopentane
O 3,1 dimethylcyclopentane
Answer:
There is no compund in the question...could you provide it please?
What is the mass percent when 96 grams of NaCl is dissolved in 255 grams of water
Find the number of CoCl2 units present in a 0.78 mol sample.
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
Here we go ~
1 mole of [tex] \sf{ COCl_2} [/tex] has 6.022 × 10²³ molecules of the given compound.
So, 0.78 mole of [tex] \sf{COCl_2} [/tex] will have ~
[tex]\qquad \sf \dashrightarrow \: 0.78 \times 6.022 \times 10 {}^{23} [/tex]
[tex]\qquad \sf \dashrightarrow \: \approx4.7 \times 10 {}^{23} \: \: \: molecules[/tex]
how is the water in the swimming pool similar to earth's interior? How is it different?
Explanation:
Water is a liquid, it is same as the oceans water, but, swimming pool water contains Flourine (F) or Chlorine (CI) to clean it up, scinece there is no way that the water moves.
what is the balanced equation for the production of water?
Answer:
H₂ + O₂ → H₂O
Now, check that oxygen has two atoms on the left and one on the right
so, you put 2 on the right side
H₂ + O₂ → 2H₂O
oxygen is balanced so, add 2 on H₂ to balance out hydrogen
THE FINAL BALANCED EQUATION:
2H₂ + O₂ → 2H₂OHow is star stuff connected to the sun?
How can we prevent coral reefs from dying in the first place?
Answer:
recycle and dispose of trash properly
minimize use of fertilizer
use environmentally friendly modes of transportation
scientists say creating marine refuges where fishing, mining, and recreating are off limits, make the reefs healthier, and so more resilient
A radioactive nuclide that is used for geological dating has an atomic number of 19 and mass number 40. which is the symbol of this nuclide? superscript 19 subscript 21 upper k. superscript 21 subscript 19 upper k. superscript 40 subscript 19 upper k. superscript 19 subscript 40 upper k.
The symbol of the radioactive nuclide given the data is superscript 40 subscript 19 upper K (⁴⁰₁₉K)
Composition of atomsAn atom is composed of sub-particles which include
Proton Neutron Electron How to represent an atomThe symbol of an atom showing its atomic number and molar mass can be represented as follow
ⁿₓA
Where
n is the mass number x is the atomic number A is the symbol How to represent the symbol of the nuclei Mass number (n) = 40Atomic number (x) = 19Symbol (A) = K Representation =.?ⁿₓA => ⁴⁰₁₉K
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Answer:
c
Explanation:
edge
Which factor helped to first drive plants to live on land?
greater access to sunlight on land
lack of competition in the water
greater access to water on land
lack of turgor pressure in the water
A factor which helped to first drive plants to live on land is: A. greater access to sunlight on land.
The chemical reaction for photosynthesis.In Science, photosynthesis is a light-dependent process and it is typically represented by the following chemical reaction:
Carbon dioxide + water + light energy ⇒ sugar + oxygen
Based on the chemical reaction above, we can infer and logically deduce that light energy (sunlight) obtained from the Sun is a very important factor for photosynthesis.
Consequently, greater access to sunlight on land became a factor which helped to first drive plants to live on land.
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Answer:
it is A step by step
Explanation:
Lake Michigan holds 1.3 x 1015 gallons of water. If just Chicago removed water from the
lake and it never rained again, how many days would the water last? Chicago uses 1.2 x 109
gallons of water /day
1,300,000,000,000,000 gallons
Show work
1.3 x 10¹⁵ : 1.2 x 10⁹ = 1.083 x 10⁶
Answer:
1.3x 10 15 gallons of water / 1.2x 10 9 gallons/day=
1.1x 10 6 gallons/day
Explanation:
name two regulations that mining operations must follow to reduce the impact they have on the environment?
Answer:
The Clean Water Act and the Endangered Species Act.
Explanation:
mining operations must follow these regulations or else they will not be able to use the land
A solution has a [OH-] of 1 x 10^-12 M. What is the [H3O+] of the solution?
How does the rate of formation of o2 compared with the rate of formation of h2o and the rate of hydrogen peroxide consumption
The rate of formation of water and the decomposition of hydrogen peroxide is double as compared to rate of formation of oxygen.
What is chemical reaction?The chemical reaction is given as the reaction of the reactants in the process to form the new compound.
The chemical reaction with the decomposition of hydrogen peroxide is:
[tex]\rm 2\;H_2O_2\;\rightarrow 2\;H_2O\;+\;O_2[/tex]
The rate of formation of water is given to be double the rate of formation of oxygen as 2 moles of water formed with 1 mole of oxygen.
The rate of disappearance of hydrogen peroxide is double with formation of oxygen as for decomposition of 2 moles of hydrogen peroxide, 1 mole of oxygen is formed.
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A 1. 0 l solution of agno3 and pb(no3)2 has a ag concentration of 0. 20
With an Ag concentration of 0.020 M and a Pb2+ concentration of 0.0010 M, Only PbSO₄(s) will precipitate. The correct option is C.
What is molarity?Molarity is the measure of the concentration of any solute in per unit volume of the solution.
The equations are
[tex]\rm Ag_2SO_4--- > 2Ag++SO4^{-2}[/tex]
[tex]PbSO_4--- > Pb_2+ +SO4^{-2}[/tex]
Therefore:
[tex]Ag_2SO_4=[0.02^2[0.001]]\\Ag_2SO_4=4 \times 10^{-7}[/tex]
and
[tex]PbSO_4=[0.001^2[0.001]]\\PbSO_4=4*10^{-6}[/tex]
Since, [tex]PbSO_4 > > PAg_2SO_4[/tex], only PbSO₄ will precipitate.
Thus, the correct option is (C) Only PbSO₄(s) will precipitate.
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The pOH of pure water at 40 oc is 6.8. What is the hydronium concentration, [H30 ], in pure water at this temperature
The pOH of pure water at 40 degree C is 6.8, then the hydronium ion concentration in pure water at this temperature is 6.3 × 10⁻⁸M.
What is the relation between pH and pOH?Relation between the pH and pOH will be represented by the following equation:
pH + pOH = 14
Given that, pOH of water = 6.8
Then pH will be pH = 14 - 6.8 = 7.2
We know that, pH = -log[H⁺]
[H⁺] = [tex]10^{-pH}[/tex]
[H⁺] = [tex]10^{-7.2}[/tex] = 6.3 × 10⁻⁸M
Hence concentration of hydronium ion at that temperature is 6.3 × 10⁻⁸M.
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A few drops of methyl orange are added to a reaction mixture. during the reaction, a gas is produced and methyl orange turns from red to orange. what are the reactants?
a- aqueous sodium hydroxide and ammonium chloride
b- aqueous sodium hydroxide and calcium carbonate
c- dilute hydrochloric acid and magnesium
d- dilute hydrochloric acid and aqueous sodium hydroxide
*please tell the correct answer and its reasoning.
The reactants are Option C , dilute hydrochloric acid and magnesium which turns methyl orange from red to orange .
What are Indicators ?Indicators are substances that change colour when they are added to acidic or alkaline solutions.
Litmus, phenolphthalein, and methyl orange are all indicators that are commonly used in the laboratory.
Methyl orange in an acidic medium turns Red or orange , Yellow in neutral medium and Yellow in akaline medium .
Phenolphthalein in an acidic medium turns Colourless , Colourless in neutral medium and Pink in akaline medium .
Magnesium reacts with hydrochloric acid to produce hydrogen gas
Mg (s) + 2 HCl (aq) → MgCl₂ (aq) + H₂ (g)
In this reaction, the magnesium and acid are gradually used up. However the acid is in excess, so it is mainly the loss of magnesium.
So the solution is acidic and therefore when methyl orange are added to a reaction mixture methyl orange turns from red to orange
Therefore the The reactants are Option C , dilute hydrochloric acid and magnesium which turns methyl orange from red to orange and H₂ gas is produced .
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When butane burns in an excess of oxygen, the principal products are:.
Answer:
Carbon dioxide and water
Explanation:
All hydrocarbons, when burned in excess of oxygen produces carbon dioxide and water [along with the unused oxygen].
The equation for the combustion of butane is:
C₄H₁₀ + 6.5O₂ → 4CO₂ + 5H₂O
(C=12.01 amu, H=1.008 amu, O=16.00 amu)
[?] g/mol CH20
CH₂O = C + 2.H + O
= 12.01 + 2 x 1.008 + 16
= 30.026 amu = 30.026 g/mol
Which chemical symbol represents an element?
O H2O
O C20
O H₂CO3
O CO
Answer:
C20
Explanation:
Element is a pure substance which is composed of atoms of similar elements. It can not be decomposed into simpler constituents using chemical reactions. Example: Carbon
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass. It can be decomposed into simpler constituents using chemical reactions.
Example: Carbon monoxide.
Thus chemical symbol represents an element is C20
Pretty sure this is what you're looking for.
For which part of the engineering process would the use of statistics to
analyze data about a new drug test be helpful?
O A. Making a plan
a
B. Identifying a need
O C. Testing the solution
D. Evaluating the results
Answer:
D
Explanation:
While evaluating you will notice if it works or not
If a rock sample originally contained 12 g of uranium 235, how much will be left after 2 half lives?
Answer:
3 g
Explanation:
new mass = (1/2)^n * original mass
where n = number of half lives
(1/2) ^2 * 12
= 3 g
Describe each type of reaction that can take place and explain the factors that affect reaction rates.
There are 2 different questions above...
Answer(s):
synthesis, decomposition, combustion, single replacement, and double replacement.the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.::: (\_(\ Hope
*: (=' :') this
•.. (,('')('') helped :)
Question: What is the specific heat of iron if 985 J of energy is required to raise the temperature of 158.5 g from 10.0°C to 24.0°C?
I will give brainliest please help
Answer: 0.065
Explanation:
As hcl(g) is added to water , the ph of the water solutiuon
Answer:
See below
Explanation:
goes down....turns more acidic as HCl is added to water
Answer:
Decrease
Explanation:
There will be a decrease in the pH of the water solution.
What do the craters on the moon’s surface tell us about its past?
There may be alien life on the moon.
The moon’s surface has been struck with other objects.
There are volcanoes on the moon.
Mountains formed on the moon.
Answer:
The moon's surface has been struck with other objects.
Explanation:
Answer 1 - Craters are not a sign of alien life as there is nothing directly showing the crater's are not natural phenomena.
Answer 2 - Craters are (normally) produced by the impact force of a foreign object that is moving quickly and collides with an object of larger size.
Answer 3 - Volcanos form mountains and magma tubes, not craters.
Answer 4 - The formation of mountains does not relate to craters in any meaningful way.
Answer: The moon’s surface has been struck with other objects.
Explanation: because those crates were caused by drifting objects such as asteroid's and meteorite's that caused craters in the moon.
the answer is D
