Select ALL of the abiotic factors
lesson 5.01
Question 1 options:
air
light
fungi
soil
salinity
Answer:
I think it should be
salinity and
light
What is the lowest whole number ratio between the aluminum ion and carbonate ion in the compound, aluminum carbonate?
A. 2 :1
B. 1: 1
C. 3 : 2
D. 1 : 2
E. 2 : 3
Answer:
E. 2 : 3
Explanation:
Aluminium carbonate is a neutral compound made by aluminium ion, Al³⁺ and carbonate ion, CO₃²⁻. As is neutral, the formula must be:
Al₂(CO₃)₃.
2 Al₃⁺ = 6 positives charges
3 CO₃²⁻ = 6 negative charges
Thus, the simplest whole number ratio between Al³⁺ and CO₃²⁻ must be:
2:3
And right answer is:
E. 2 : 3what dose bioverisidy refer to
Answer:
The term biodiversity (from “biological diversity”) refers to the variety of life on Earth at all its levels, from genes to ecosystems, and can encompass the evolutionary, ecological, and cultural processes that sustain life.
or if you want a short answer:
The term “biodiversity” refers to the variety of living organisms.
Answer:
the term bioverisidy refer to the veriety of life on earth at all its levels from genes to ecosystem and ecompass the evolutionary ecological and cultural prosesses that sustain life
If 50 mL of pure acetone is mixed with 450 mL of water, what is the percent by volume of acetone?
Answer:
10%
Explanation:
The percent by volume of acetone is given by the following formula:
% v/v = Volume of acetone / Total Volume * 100%
Now we calculate the total volume of the solution:
Total Volume = Volume of Acetone + Volume of Water
Total Volume = 50 mL + 450 mL = 500 mL
Then we calculate the percent by volume:
% v/v = 50 mL / 500 mL * 100 % = 10%
2. In the electrolysis of water
(a) Name the gases liberated at anode and cathode.
(b) Why is it that the volume of gas collected on one electrode is two times that on the other
electrode?
(c) What would happen if dil.H,SO, is not added to water?
Answer:
In the electrolysis of water the gases collected in anode is oxygen and in cathode is hydrogen.
It is because water contains two molecules as compared to one molecules of oxygen.
If Dil.H,So, is not added in water then water doesn't conduct electricity.
Please make me brainiest answer
Give the following number of protons, neutrons, and electrons in the following isotope:
ll5Ag
Group of answer choices
47,47.64
47,47.68
47,47.47
Answer:
47, 68, 47
Explanation:
Let's consider the following isotope: ¹¹⁵Ag.
If we look in the Periodic Table, the atomic number of Ag is 47, that is, silver has 47 protons.
Since ¹¹⁵Ag is neutral it must have the same number of protons that of electrons. Then, it also has 47 electrons.
The number 115 in ¹¹⁵Ag stands for the mass number, which is the sum of protons and neutrons. Then, the number of neutrons is:
p⁺ + n⁰ = 115
n⁰ = 115 - p⁺ = 115 - 47 = 68
The number of protons, neutrons, and electrons in ¹¹⁵Ag is: 47, 68, 47.
7. What is the pH of [OH-] = 1.0 * 10-5 solution?
О
1
5
14
9
Answer:
I'd 9 Coz is better than anything else I help so u need to other people that question don't be jealous of them
Please hurry! And help!!
Best answer gets marked Brainliest!
NO LINKS or question will be REPORTED!
When two nitrogen atoms combine, they form a
A) Compound
B) Liquid
C) mixture
D) Molecule
Answer:
I guess the answer is compound
Explanation:
Coz compound it is on there playing with me again Go ahead and paste it in the class
Which substance has Delta.Hf defined as 0 kJ/mol?
A. H2O (s)
B. Ne (l)
C. F2 (g)
D. CO2 (g)
Answer:
its actually c
Explanation:
A nurse practitioner prepares 470. mL of an IV of normal saline solution to be delivered at a rate of 85 mL/h. What is the infusion time, in hours, to deliver 470. mL?
Answer: Infusion time is 5.5 h
Explanation: Time is 470 ml / 85 ml/h = 5.5 h
Titan, the largest moon of Saturn, has an atmosphere that is about 94% nitrogen (N2) and 6% methane (CH4). The molecular mass of nitrogen is 4.651e-26kg and the molecular mass of methane is 2.663e-26kg. The acceleration due to gravity at the surface is about 1.35 m/s^2. For this problem, assume that Titan's atmosphere is in thermal equilibrium at 100 K. What fraction of the atmosphere is methane at altitude 2 km
Answer:
9.493 e-01
Explanation:
Given that Titan's temperature at thermal equilibrium = 100 K
Determine the fraction of the atmosphere that is methane
at an altitude of 2 km
applying Ideal gas law
P = Po e^ -Z/k ---- ( 1 )
In this question Z = M₀ g z ( replace -Z in equation 1 with M₀gz )
P = Po e^- M₀gz / RT ------ ( 2 )
where : Mo = 16 * 10^ -3 kg/mol , g = 1.35 m/s^2 , z = 2 * 10^3 m , R = 8.3 J/mol.k , T = 100 k
insert values Back to equation 2
P = Po e^-0.052
P = 0.9493 Po
hence the fraction of the atmosphere that is methane
= P / Po = 9.493 * 10^-1
= 9.493 e-01
Charles's Law: This law essentially states that gas volume has a direct relationship to temperature. If a football is inflated indoors during winter and then taken outside, what volume will be occupied inside the football if indoors the football is inflated at 26°c taking up 100 cm3, and it is 13°c outside?
Answer:
V2 = 95.65 cm^3 or 96 cm^3 (depends on if you want to round up or not)
Explanation:
Charles law is V1 / T1 = V2 / T2 (1 means initial and 2 means final condition)
For Charles law, you must use kelvin scale for temperature. So to convert from C to K, you add 273.15
T1 = 26 +273.15 = 299.15 K
T2 = 13 + 273.15 = 286.15 K
Now plug in the values,
100 / 299.15 = V2/286.15
V2 = 95.65 cm^3 or ~ 96 cm^3
The answer should make sense because if they have a direct relation, if one goes down then the other goes down. For final condition, we lowered the temperature so our volume should have decreased too and it did (we went from 100 to 96 cm^3)
tetrachlorination of methane
Answer:
Correct option is
CCI 4
Chlorination of methane follows free radial mechanism. When chlorine is present in small quantity then only single substitution takes place, but if chlorine is present in excess then all the hydrogen is substituted by chlorine. So tetra substituted product is formed. The following is the reaction of chlorination of methane:
solution
What kind of changes do chefs make to food?
[readworks]
If a buffer solution is 0.190 M in a weak acid ( a=3.6×10−5) and 0.480 M in its conjugate base, what is the pH?
Solution :
[tex]pk_b = -log ( K_b)\\\\pk_b = - log ( 3.6 \times 10^{-5})\\\\pk_b = 4.44[/tex]
We know, pH of this solution :
[tex]pH = pK_a + log ( \dfrac{|conjugate\ base|}{|weak \ acid|}\\\\pH = 4.44 + log(\dfrac{0.480}{0.190})\\\\pH = 4.44 + 0.40\\\\pH =4.84[/tex]
Hence, this is the required solution.
How many moles of Fe(OH), are produced when 85.0 L of iron(III)
sulfate at a concentration of 0.600 mol/L reacts with excess
NaOH?
Answer:
102 mol Fe(OH)₃
Explanation:
The reaction that takes place is:
Fe₂(SO₄)₃ + 6NaOH → 2Fe(OH)₃ + 3Na₂SO₄First we calculate how many Fe₂(SO₄)₃ moles reacted, using the given concentration and volume:
0.600 mol/L * 85.0 L = 51 mol Fe₂(SO₄)₃Then we convert Fe₂(SO₄)₃ moles into Fe(OH)₃ moles, using the stoichiometric coefficients of the reaction:
51 mol Fe₂(SO₄)₃ * [tex]\frac{2molFe(OH)_3}{1molFe_2(SO_4)_3}[/tex] = 102 mol Fe(OH)₃An Arrhenius base increases the concentration of hydrogen ions when dissolved in solution. (3 points)
Answer:
Explanation:
False
Answer:
false
Explanation:
took the test
When fluorine (F) forms chemical compounds with metals, the fluorine atom gains electrons , looses electrons
how can miscible liquids that different boiling points be separated
Answer:
By boiling and further condensing the liquid with the lowest boiling point.
Explanation:
Hello there!
In this case, according to the attached diagram, it turns out possible for us to infer that the mechanism whereby miscible liquids with different boiling points are separated is distillation, because the flask is heated until the boiling point of the liquid with the lowest value, in order to boil it and subsequently condense it, whereas the liquid with the highest boiling point remains in the flask; and therefore, the two liquids are separated.
Regards!
What chemical is used to represent compounds
Answer:
Compounds are represented by chemical formulas. Elements in a compound are represented by chemical symbols, and the ratio of different elements is represented by subscripts.
Calculate the molar mass of Ca3(PO4)2
934.32 g Ca3(PO4)2 =______
moles Ca3(PO4)2
Answer:
Molar mass of Ca₃(PO₄)₂ = 310.18 g/mol934.32 g Ca₃(PO₄)₂ = 3.01 moles Ca₃(PO₄)₂Explanation:
The molar mass (MM) of Ca₃(PO₄)₂ can be calculated as follows:
MM of Ca₃(PO₄)₂ = (MM of Ca)*3 + [(MM of P) +(MM of O)*4]*2MM of Ca₃(PO₄)₂ = 310.18 g/molNow we can convert 934.32 g of Ca₃(PO₄)₂ into moles:
934.32 g ÷ 310.18 g/mol = 3.01 molesMaintaining constant pressure, the volume of a gas is increased from 12,0 L
to 32.0 L by heating it. If the original temperature was 23.0°C, what is the
new temperature? *
23. 45 K
61.33 K
789.33 K
567.87 K
Answer:
790 K
Explanation:
Step 1: Given data
Initial volume of the gas (V₁): 12.0 LInitial temperature of the gas (T₁): 23.0 °CFinal volume of the gas (V₂): 32.0 LStep 2: Convert 23.0 °C to Kelvin
We will use the following expression.
K = °C + 273.15 = 23.0 + 273.15 = 296.2 K
Step 3: Calculate the final temperature of the gas
Assuming constant pressure and ideal behavior, we can calculate the final temperature of the gas using Charles' law.
T₁/V₁ = T₂/V₂
T₂ = T₁ × V₂/V₁
T₂ = 296.2 K × 32.0 L/12.0 L = 790 K
27. Sample of neon gas has a pressure of 4.1 atm and argon gas with a pressure of 3.2 atm are added to a
container of nitrogen gas which has a pressure of 6.2 atm, what is the total pressure of the container?
A) 7.3 atm
B) 10.3 atm
C) 13.5 atm
D) 5.3 atm
Answer:
Option C. 13.5 atm
Explanation:
From the question given above, the following data were obtained:
Pressure of Neon (Pₙₑ) = 4.1 atm
Pressure of Argon (Pₐᵣ) = 3.2 atm
Pressure of nitrogen (Pₙ₂) = 6.2 atm
Total pressure (Pₜ) =?
The total pressure in the container can be obtained by adding the pressure of the individual gases. This is illustrated below:
Pₜ = Pₙₑ + Pₐᵣ + Pₙ₂
Pₜ = 4.1 + 3.2 + 6.2
Pₜ = 13.5 atm
Therefore, the total pressure in the container is 13.5 atm
Consider the role of third world countries in this system. How would they benefit or not benefit from a cap and trade system?
Answer:
they would benefit
Explanation:
they would benefit because we can move more machines that reduce pollution in those countries.
A chemist must dilute of aqueous potassium iodide solution until the concentration falls to . He'll do this by adding distilled water to the solution until it reaches a certain final volume. Calculate this final volume, in liters. Round your answer to significant digits.
Answer:
The answer is "[tex]0.157\ L[/tex]"
Explanation:
Please find the complete question in the attached file.
[tex]M_1=13.5\ M\\\\V_1=58.0\ ml\\\\M_2=5.00\ M\\\\[/tex]
Using formula:
[tex]M_1V_1=M_2V_2\\\\V_2 = \frac{(M_1V_1)}{M_2}\\\\[/tex]
[tex]= \frac{(13.5 \times 58.0)}{5.0}\\\\= 156.6 \ ml\\\\[/tex]
[tex]= \frac{156.6}{1000}\ L\\\\ =0.157\ L\\\\[/tex]
15men work in 80days .How long will it take to finish that work if 5men were added?
Answer:
80 day= 15 men
Explanation:
1 man takes = 80*15 = 1200 days
20 men take = 1200/20= 60 days
Answer:
80 days=15 men
Explanation:
hope it helps❣️
A “happy” atom is one that has a _________ valence orbital. octet rule
Answer:
Hello There!!
Explanation:
I believe the answer is 8.
hope this helps,have a great day!!
~Pinky~
what are factors that affecting the boiling point of liquid?
How many liters of C3H6O are present in a sample weighing 25.6 grams?
Answer:
V = 0.0327 L.
Explanation:
Hello there!
In this case, according to the given information, it turns out possible for us to calculate the liters of C3H6O by the definition of density. We can tell the density of this substance as that of acetone (0.784 g/mL) and therefore calculate the liters as shown below:
[tex]V=25.6g*\frac{1mL}{0.784g}*\frac{1L}{1000mL}\\\\V=0.0327L[/tex]
Regards!
A beaker of 450g of water is heated from 4.0°C to 25.0°C on a hot plate. If the
specific heat of H2O is 4.18J/9°C how much energy has the water absorbed?
A 39,501 J
B 4.42 x 104
C 5.13 J
D 54,549 J
Answer: 5.13
Explanation: juss do it
Taking into account the definition of calorimetry, the water has absorbed 39,501 J.
CalorimetryCalorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
So, the equation that allows to calculate heat exchanges is:
Q = c× m× ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
Energy that the water absorbedIn this case, you know:
Q= ?c= 4.18 [tex]\frac{J}{gC}[/tex]m= 450 g ΔT= Tfinal - Tinitial= 25 C - 4 C= 21 CReplacing in the definition of calorimetry:
Q = 4.18 [tex]\frac{J}{gC}[/tex]× 450 g× 21 C
Solving:
Q= 39,501 J
Finally, the water has absorbed 39,501 J.
Learn more about calorimetry:
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