Answer:
A) Los alquimistas.
Explanation:
¡Hola!
En este caso, es necesario recordar que en la historia de la ciencia, la alquimia se define como una vieja práctica protocientífica con tintes filosóficas que se enfocaba en la combinación de elementos de la química, metalurgia, física, medicina, astrología, semiótica, misticismo, espiritualismo y el arte; por tal razón, se sabe que esta era la que buscaba el elixir de la vida eterna. Por lo tanto, la respuesta es A) Los alquimistas.
¡Saludos!
Which one of the samples contains the most molecules?
o
A. 1 mol of CO2(g)
B. 1 mol of UF6(g)
O C. 1 mol CH3COOH()
D. They all have the same number of molecules
Answer: D is right
Explanation: One mole contains 6.0225 ·10^23 molecules
Despite of the substance
Soil is the result of weathering?
Answer:
yes, soil is weathered from the bedrock below the subsoil. Soil contains whatever the bedrock below it consist of whatever the bedrock below it is made of.
Explanation:
Hope this helps!
Humans have altered the composition
of Earth's atmosphere by
A. Making the air pressure drop
B. Making the air temperature drop
C. Polluting it with excess ozone
D. Polluting it with carbon dioxide gas
The answer is most likely D
Determine the concentration of strontium ions in saturated solution of strontium sulfate, SrSO4, if the Ksp for SrSO4 is 3.2x10-7.
Answer:
[tex][Sr^{2+}]=5.66x10^{-4}M[/tex]
Explanation:
Hello there!
In this case, given the solubility equilibrium of strontium sulfate:
[tex]SrSO_4(s)\rightleftharpoons Sr^{2+}(aq)+SO_4^{2-}(aq)[/tex]
Whose equilibrium expression is:
[tex]Ksp=[Sr^{2+}][SO_4^{2-}][/tex]
In such a way, we can introduce the molar solubility, s, in the equation to obtain:
[tex]Ksp=s*s=s^2\\\\3.2x10^{-7}=s^2[/tex]
Then, we apply the square root to obtain:
[tex]s=\sqrt{3.2x10^{-7}}\\\\s=5.66x10^{-4}M[/tex]
Which is also the concentration of strontium ions:
[tex][Sr^{2+}]=5.66x10^{-4}M[/tex]
Best regards!
Carbon dioxide reacts with lithium hydroxide to produce lithium carbonate and water.
What mass of lithium hydroxide would be required to react with 1.00 x 103 grams of carbon dioxide?
Answer:
1.08827 x 10^3 g.
Explanation:
The equation for the reaction is:
2LiOH + CO2 ----> Li2CO3 + H2O
Using the molar masses:
CO2 = 12.011 + 2* 16 = 44.011.
LiOH = 6.94 + 1.008 + 16 = 23.948
S0 44.011 of CO2 reacts with 2*23.948 g of LiOH
1.00 *10^3 g CO2 reacts with 2*23.948 * 1.00 *10^3 / 44.011
= 1088.27 g LiOH.
Identify each of the following as a single bond, double bond, or triple bond.
What is the pH of a solution with a [H+] concentration of 1.0 x 10^-6 M?
Answer:
6Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log ([ {H}^{+} ])[/tex]
From the question we have
[tex]pH = - log(1.0 \times {10}^{ - 6} ) \\ = 6[/tex]
We have the final answer as
6Hope this helps you
Homeostasis is the balance between your internal and external environments. We
learned three major factors that your body helps to regulate. Match each description
of body responses on the right to the types of regulation on the left.
Regulation of Body
Temperature
Regulation of Blood pH
Regulation of Blood glucose
———————————————
1. Sweat or shivering helps control
this
2. Breathing faster or slower help
adjust this
3. Eating or drinking help adjust this
Answer:
They are already matched for you. It goes
1.
2.
3.
in the order of the questions.
Consider the reaction 2CO * O2 —> 2 CO2 what is the percent yield of carbon dioxide (MW= 44g/mol) of the reaction of 10g of carbon monoxide (MW=28g/mol) with the excess O2 produces 10g of carbon dioxide? Answer in units of %
Answer:
Y = 62.5%
Explanation:
Hello there!
In this case, for the given chemical reaction whereby carbon dioxide is produced in excess oxygen, it is firstly necessary to calculate the theoretical yield of the former throughout the reacted 10 grams of carbon monoxide:
[tex]m_{CO_2}^{theoretical}=10gCO*\frac{1molCO}{28gCO}*\frac{2molCO_2}{2molCO} *\frac{44gCO_2}{1molCO_2}\\\\ m_{CO_2}^{theoretical}=16gCO_2[/tex]
Finally, given the actual yield of the CO2-product, we can calculate the percent yield as shown below:
[tex]Y=\frac{10g}{16g} *100\%\\\\Y=62.5\%[/tex]
Best regards!
can someone do this for me i wasent there when we learned it
A student prepares two solutions as shown. The dots represent solute particles. The student wants to test the conductivity of each solution. Prior to carrying out the investigation, the student needs to identify the variables being controlled and the variables being changed between the two solutions.
A.
The volume of the solution and the number of solute particles are being changed between the two solutions, but the concentration of the solution is being held constant.
B.
The number of solute particles and the concentration of the solution are being changed between the two solutions, but the volume is being held constant.
C.
The number of solute particles is being changed between the two solutions, but the volume and concentration of the solution is being held constant.
D.
The volume of the solution and the concentration of the solution are being changed between the two solutions, but the number of solute particles is being held constant.
Answer:
I think its D
Explanation:
It cant be B or C bc the solute particles arent changing. And its not A because the concentration isnt constant
The volume of the solution and the concentration of the solution are being changed between the two solutions, but the number of solute particles is being held constant.
What is conductivity?The term conductivity refers to the movement of electric current through a solution and it depends on the avilability of ions in the solution.
When measuring the conductivity of solutions, the volume of the solution and the concentration of the solution are being changed between the two solutions, but the number of solute particles is being held constant.
Learn more about conductivity: https://brainly.com/question/14356798
Students were shown models of two atoms and asked to make a list of similarities and differences between the models.Which statement about the atomic models shown is correct?
Answer:
lol you don't have the models showing but I found this question online
" Both models represent atoms with the same atomic number. "
Explanation:
hope this helps
In the reaction below, 22 g of H2S with excess
O2 produced 5 g of sulfur.
? H2S + ? O2 → ? S + ? H2O .
What is the percent yield of sulfur?
Answer in units of %.
Answer:
24%
Explanation:
From the question, the limiting reactant is H2S.
The reaction equation is;
2H2S + O2 → 2S + 2H2O
Number of moles of H2S reacted = 22g/34 g/mol = 0.647 moles
According to the reaction equation;
2 moles of H2S yields 2 moles of sulphur
0.647 moles of H2S yields 0.647 moles of sulphur
So;
Theoretical yield of sulphur = 0.647 moles * 32 g/mol = 20.7 g
Actual yield = 5 g
% yield = actual yield/theoretical yield * 100
% yield =5 g/20.7 g * 100
% yield = 24%
What volume of H2S is needed to produce 14.2 L of SO2 gas? The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O.
Answer:
14.2 L H2S
Explanation:
Mole ratio
2 mol H2S:2 mol SO2
We are just looking for volume, so the required amount is the same as the produced amount as long as the mole ratio is balanced.
The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.
What is Mole ratio?Two factors can be used to identify stoichiometry problems: the information provided in the problem and he information that needs to be solved for, also known as the unknown.
The given and the unknown might both be reactants, could both be products, or could both be products with one of them acting as a reactant. Mole amounts can be used to express the substance quantities.
However, it is typical in a laboratory setting to calculate a substance's mass in grams to determine how much of it is present. A gaseous substance's volume can be used to express its quantity.
Therefore, The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.
To learn more about balanced equation, refer to the link:
https://brainly.com/question/7181548
#SPJ2
Unsorted sands have a lower porosity.
True
O False
Answer:
True
Explanation:
Where in nature would we find pure
sand that does not contain smaller or
larger particles?
Explanation:
Sand is a common material found on beaches, deserts, stream banks, and other landscapes worldwide. In the mind of most people, sand is a white or tan, fine-grained, granular material. However, sand is much more diverse - even beyond the pink sand beaches of Bermuda or the black sand beaches of Hawaii.
pls answer no robots
a student was investigating the reaction between marble chips and dilute hydrochloric acid
Answer:
Marble chips react with dilute hydrochloric acid to produce carbon dioxide gas. The rate of this reaction can be changed by changing the size of the marble chips.
Explanation:
Hope it helps u
FOLLOW MY ACCOUNT PLS PLS
Please help answer this. And please no links!
Answer:
i am not sure but its 2 ican"t qry
Explanation:
2) A bicycle rider is traveling up a hill. When the rider reaches the top of
the hill, she stops to rest. Then she travels down the hill. The diagram
shows the rider in the three different positions. Which of these correctly
describes the potential energy and kinetic energy of the bicycle rider?
Answer: A: When the rider is at the top of the hill, her potential energy is greatest, and her kinetic energy is the least.
Explanation:
A toy car rolls 8 meters in 2 seconds. What is the average speed of the toy car?
16 m/s
10 m/s
4 m/s
6 m/s
Elements in Group I of the Periodic Table react with water.
Which row describes the products made in the reaction and the trend in reactivity of the elements?
Answer:
B
Explanation:
Si en un planeta la presión atmosférica es mayor que 5,1 atm terrestres, los habitantes podrían nadar en ríos de dióxido de carbono líquido?
Answer:
Los habitantes del planeta con una atmósfera superior a 5,1 atm de la Tierra, no estarían nadando en ríos de dióxido de carbono líquido
Explanation:
De las tablas de datos termodinámicos, la presión a la que el vapor de dióxido de carbono está en equilibrio con su estado líquido a una temperatura ambiente de 25 ° C es 6,401 kPa, lo que equivale a 63,17296 atm.
Por lo tanto, a una presión de 5.1 de la atmósfera terrestre, el dióxido de carbono es completamente gaseoso y los habitantes del planeta con una presión atmosférica de 5.1 atm de la Tierra todavía observarían solo hidrógeno gaseoso y no estarían nadando en ríos de dióxido de carbono líquido.
Question is in picture
Answer:
Explanation: hELLO its b
Describe bonding in water molecules using the VBT. Show the overlap of hybridised orbitals leading to the formation of H2O molecule. Account for the bond angle 104.5°
What element is 1s^2 2s^2 2p^6 3s2 3p^3
Answer:
Phosphorus
Explanation:
If you add up all the electrons (the exponents) it equals 15 which is the atomic number of phosphorus. And since stable atoms have the same number of protons and electrons it'll be phosphorus
What common item can detect the presence of radiation? A. Bleach B. A roll of photographic film C. LED watch D. Baking soda
Answer: B- a roll of photographic film
Explanation:
Founders education answer
.In a _____ relationship one variable increases and a second variable increases proportionally,
A. inverse relationship/inversely proportional
B. direct relationship/directly proportional
C. converse relationship/conversely proportional
Answer:
Explanation: b
A gas at 55.0°C occupies a volume of 3.60L. What volume will it occupy at 30.0° C?
Pressure is constant
Answer:
3.33L
Explanation:
What term is used by chemists to quantitatively describe a solution in which a relatively small amount of solute is dissolved?