Answer: 24
Explanation: multiply 12 with 2
Which is the most explosive element?
Answer:
Hydrogen is the most explosive element
Hey guys. Sorry for all the questions. But I’m checking my answers for a Science test. Here are my questions.
1. Which type of energy does moving water have?
A. Electrical
B. Wind
C. Kinetic
D. Potential
2. A teacher walks quickly by a student sitting at her desk. Which term describes what the student observed?
A. Speed
B. Motion
C. Position
D. Force
Thank you!!
Answer:
1. c 2. b that's what i think i learned this in middle school i dont completely remember
How does the angle of the incoming light affect the intensity of the light that is refracted?
Answer:
A reflected ray always comes off the surface of a material at an angle equal to the angle at which the incoming ray hit the surface. In physics, you'll hear this called the law of reflection. You've probably heard this law stated as "the angle of incidence equals the angle of reflection
Explanation:
What type of reaction is the following: *
2C4H10 + 1302 – > 8C02 + 10,0
synthesis
decomposition
combustion
double displacement
Answer:
it is synthesis reaction
whats the powerhouse of the cell?
Answer:
Mitochondria is known as the powerhouse of the cell as it provides teh energy required for the cell to carry out cellular respiration and cellular process that maintain the cell
Define Fusion and Fission.
I just need a summed up answer.
Answer:
Fission and fusion are two physical processes that produce massive amounts of energy from atoms. They yield millions of times more energy than other sources through nuclear reactions.
Explanation:
Hope this answer your question.
The equation below represents chemical reaction that occurs in living cells. C₆H₁₂O₆ + 6O₂ → 6CO₂ + 6H₂O + energy How many atoms are represented in the reactants of this equation?
Answer:
36
Explanation:
There are 6 Carbon atoms, 12 Hydrogen atoms, and 18 Oxygen atoms.
Rafa places some copper into a solution of sodium chloride. No reaction takes place. Using the displacement theory, explain why no reaction took place?
Na more reactive than Cu
Further explanationGiven
Copper in a solution of NaCl
Required
The displacement theory
Solution
A single replacement reaction is a chemical reaction in which one element replaces the other elements of a compound to produce new elements and compounds
Not all of these reactions can occur. We can use the activity series, which is a list of elements that can replace other elements below / to the right of them in a single replacement reaction.
The voltaic series:
Li-K-Ba-Ca-Na-Mg-Al-Mn- (H2O) -Zn-Cr-Fe²⁺-Cd-Co-Ni-Sn-Pb- (H) -Cu-Hg-Fe³⁺-Ag-Pt-Au
The electrode which is easier to reduce than the hydrogen (H2) electrode has a positive sign (E red= +) and is located to the right of the voltaic series (right of H)
The electrode which is easier to oxidize than the hydrogen (H2) electrode and is difficult to experience reduction has a negative sign (E red= -) and is located to the left of the voltaic series (left of H)
Reaction
Cu + NaCl≠
The existing copper element can not replace the sodium element, which is on the left side so the reaction will not occur.
But if it is reversed, then a reaction can occur
2 Na + CuCl2 → Cu + 2 NaCl
Write a paragraph that would persuade your family members and neighbors to wear their face mask whenever they gout from their homes and to observe physical distancing with another. Follow the tips for structuring a persuasive piece.
Answer:
going without without masks is like to play with a dirty things which is very undesired and unwanted .corona virus is very serious world wide epidemic which is surrounded in all region due to our carelessness many lives are taken due to our carelessness. so please wear mask and maintain social distance to fight against all types of communicable diseases. I hope please be rational and aware.
Answer:
Hola porfa ayudame si podes
Calculate the percent of each component in the mixture. Show your calculations. Circle final answers.
Answer:
See Explanation
Explanation:
The question is incomplete; as the mixtures are not given.
However, I'll give a general explanation on how to go about it and I'll also give an example.
The percentage of a component in a mixture is calculated as:
[tex]\%C_E = \frac{E}{T} * 100\%[/tex]
Where
E = Amount of element/component
T = Amount of all elements/components
Take for instance:
In [tex](Ca(OH)_2)[/tex]
The amount of all elements is: (i.e formula mass of [tex](Ca(OH)_2)[/tex])
[tex]T = 1 * Ca + 2 * H + 2 * O[/tex]
[tex]T = 1 * 40 + 2 * 1 + 2 * 16[/tex]
[tex]T = 74[/tex]
The amount of calcium is: (i.e formula mass of calcium)
[tex]E = 1 * Ca[/tex]
[tex]E = 1 * 40[/tex]
[tex]E = 40[/tex]
So, the percentage component of calcium is:
[tex]\%C_E = \frac{E}{T} * 100\%[/tex]
[tex]\%C_E = \frac{40}{74} * 100\%[/tex]
[tex]\%C_E = \frac{4000}{74}\%[/tex]
[tex]\%C_E = 54.05\%[/tex]
The amount of hydrogen is:
[tex]E = 2 * H[/tex]
[tex]E = 2 * 1[/tex]
[tex]E = 2[/tex]
So, the percentage component of hydrogen is:
[tex]\%C_E = \frac{E}{T} * 100\%[/tex]
[tex]\%C_E = \frac{2}{74} * 100\%[/tex]
[tex]\%C_E = \frac{200}{74}\%[/tex]
[tex]\%C_E = 2.70\%[/tex]
Similarly, for oxygen:
The amount of oxygen is:
[tex]E = 2 * O[/tex]
[tex]E = 2 * 16[/tex]
[tex]E = 32[/tex]
So, the percentage component of oxygen is:
[tex]\%C_E = \frac{E}{T} * 100\%[/tex]
[tex]\%C_E = \frac{32}{74} * 100\%[/tex]
[tex]\%C_E = \frac{3200}{74}\%[/tex]
[tex]\%C_E = 43.24\%[/tex]
Both lowercase letters have to be present for the recessive trait to show.
A. True
B. False
Can someone please check my answer for question 2? If It’s wrong please correct me. Thank you
The new volume : V₂ = 1185.9 cm³
Further explanationGiven
V₁ = 571 cm³
T₁ = 260 K
T₂ = 540 K
Required
The new volume (V₂)
Solution
Charles's Law
When the gas pressure is kept constant, the gas volume is proportional to the temperature
[tex]\tt \dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
Input the value :
V₂ = V₁.T₂/T₁
V₂ = 571 x 540 / 260
V₂ = 1185.9 cm³
Answer:
V₁ = 571 cm³
T₁ = 260 K
T₂ = 540 K your right
Explanation:
The new volume will by 1185.9
determine the density of an object that is 25 cm long 10 cm wide and 2 cm high with a mass of 50 g
Answer:
[tex]\boxed {\boxed {\sf \rho= 0.1 \ g/cm^3 }}[/tex]
Explanation:
Density is found by dividing the mass by the volume.
[tex]\rho=\frac{m}{v}[/tex]
The mass is 50 grams, but we have to find the volume.
Assuming this is a solid rectangular object, we can use this formula for volume:
[tex]v=l*w*h[/tex]
The length is 25 centimeters, the width is 10 centimeters, and the height is 2 centimeters.
[tex]v= 25 \ cm * 10 \ cm * 2 \ cm[/tex]
[tex]v= 250 \ cm^2 * 2 \ cm[/tex]
[tex]v= 500 \ cm^3[/tex]
Now we know the mass and volume:
[tex]m= 50 \ g\\v= 500 \ cm^3[/tex]
Substitute the values into the formula.
[tex]\rho = \frac{50 \ g}{500 \ cm^3}[/tex]
[tex]\rho= 0.1 \ g/cm^3[/tex]
The density of the object is 0.1 grams per cubic centimeter.
(ii) When shale gas is burned, the hydrogen sulfide reacts with oxygen.
2H2S + 3022SO2 + 2H2O
Explain how the combustion of shale gas can lead to the formation of acid rain.
Answer:
See explanation
Explanation:
Now , we have the equation of the reaction as;
2H2S(g) + 302(g)------->2SO2(g) + 2H2O(g)
This equation shows that SO2 gas is produced in the process. Let us recall that this same SO2 gas is the anhydride of H2SO4. This means that it can dissolve in water to form H2SO4
So, when SO2 dissolve in rain droplets, then H2SO4 is formed thereby lowering the pH of rain water. This is acid rain.
What causes a liquid resistance to flow
How many particles are present in 0.24 moles of carbon?
SHOW WORK
Calculate the morality
10.0 g of sodium chloride is dissolved in 2.0 L of solution.
The dashed line in the represent?
Answer:
Ok so, I would say D) because decreasing the blood glucose is actually recycling the organic chemicals. Your body uses everything in your body, filtering out the unusable chemicals and such.
Explanation:
Science :3
How is Muscular Strength measured and why is this important to know?
Answer:
Your ability to move and lift objects refers to muscular strength. It's measured by how much force you can exert for a short period of time and how much weight you can lift.
Explanation:
Describe the relationship between speed and kinetic energy.
A) A positive linear relationship
B) A negative linear relationship
C) A negative but not linear relationship
D) A positive but not linear relationship
Answer:
D) A positive but not linear relationship
Explanation:
This comes from the equation Ek=1/2mv^2
Where Ek is Kinetic Energy, m is mass, and v is the speed (or velocity).
As we can see in the equation, the relation is not linear but quadratic and it is positive.
Answer:
D) A positive but not linear relationship
Explanation:
Speed is equal to distance divided by time. ... Therefore, the kinetic energy of an object is proportional to the square of its velocity (speed). In other words, If there is a twofold increase in speed, the kinetic energy will increase by a factor of four.
CAN ANYONE HELP ME PLEASE!!
Answer:
26.34 moles
Explanation:
Define electronegativity
Answer:
The ability of an atom to attract electrons.
Explanation:
Electronegativity is the ability of an atom to attract electrons. In a bonded pair, electrons tend to stay closer to the more electronegative atom. Atoms become more electronegative near the top right of the Periodic Table, with the highest electronegativity being Fluorine.
PLEASE HELP! 80 points!!
A metal crystallizes in the face‑centered cubic (FCC) lattice. The density of the metal is 12020 kg/m3, and the length of a unit cell edge, , is 389.08 pm. Calculate the mass of one metal atom in grams.
Identify the metal. either ( gold, silver, platinum, palladium)
Answer:
the metal is gold I'd say
The mass of one metal atom is [tex]1.770\times 10^{-22}[/tex]grams.
The metal atom is palladium.
Explanation:
Given:
A face-centered unit cell.
The density of the unit cell is [tex]12020 kg/m^3[/tex].
The edge length of the unit cell 389.08 pm
To find:
The mass of one atom of the metal
Solution:
The density of the unit cell = d = [tex]12020 kg/m^3[/tex]
The edge length of the unit cell = a = 389.08 pm
[tex]1 pm = 10^{-12} m\\a=389.08 pm=389.08\times 10^{-12} m=3.8908\times 10^{-10}m[/tex]
Total number of atoms in F.C.C unit cell = z = 4
The atomic mass of the metal atom = M
The density of the unit cell is given by:
[tex]d=\frac{z\times M}{N_A\times a^3}\\12020 kg/m^3=\frac{4\times M}{6.022\times 10^{23}mol^{-1}\times (3.8908\times 10^{-10}m)^3}\\M=0.106586 kg/mol\\1 kg=1000 g\\M=0.106586 kg/mol=0.106586 \times 1000 g/mol\\M=106.586 g/mol[/tex]
The mass of one mole of metal atom = 106.586 g
The mass of 1 atom of metal :
[tex]=\frac{106.586 g}{6.022\times 10^{23}}\\=1.770\times 10^{-22} g[/tex]
The mass of one metal atom is [tex]1.770\times 10^{-22}[/tex] grams.
The atomic mass of the metal atom is 106.586 g/mol which is close to the atomic mass of the palladium. Hence, the metal atom is palladium.
Learn more about the density of unit cell here:
brainly.com/question/7210717?referrer=searchResults
brainly.com/question/1594030?referrer=searchResults
How many moles of Aluminum are in 54.0 grams of Aluminum (Al)?
Answer: 2 moles
Explanation:
AM of Al 27
What is the name given to substances that are initially involved in a chemical reaction?
Answer:
the awnser is reactants
How many grams are there in 0.250 moles of Ba(NO3)2?
Answer:
261.3368
Explanation:
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Ba(NO3)2, or 261.3368 grams.
How many grams are there in 3.4 x 10^24 atoms of He?
Group of answer choices
2.07
5.7 g
0.57 g
20.7
Given :
Number of He atoms, [tex]n = 3.4\times 10^{24}[/tex] atoms.
To Find :
How many grams are their in given number of He atoms.
Solution :
We know, molecular mass of He is 4 g. It means that their are [tex]6.022 \times 10^{23}[/tex] atoms in 4 g of He.
Let, number of gram He in [tex]3.4\times 10^{24}[/tex] atoms is x , so :
[tex]x = \dfrac{3.4\times 10^{24}}{6.022\times 10^{23}}\times 4\\\\x = $$22.58\ g[/tex]
Therefore, grams of He atoms is 22.58 g .
what is the physical property to the temperature when a liquid begins to boil?
Answer:
The boiling point
Explanation:
The boiling point is the temperature where a liquid starts to boil.
Answer:
the boiling point.
Explanation:
7.The number of protons is represented by the element’s
a.atomic number
b.mass number
c.atomic mass
d.isotope
How does an increase in temperature affect the equilibrium concentration of the underlined substance and K for each of the following reactions?
(c) SO2(g) S(s) + O2(g) DH° = 297 kJ
I WANT IT NOW PLEASE
Explanation:
The reaction is given as;
SO2(g) ⇄ S(s) + O2(g) ΔH° = 297 kJ
This reaction is an endothermic reaction because of the positive value of the ΔH°. Increasing the temperature for an equilibrium reaction with froward reaction being endothermic leads to increase in equilibrium constant (K).
Regarding equilibrium concentration;
In an equilibrium reaction, any change to the system is annuled. If there is an increase in temperature, in order to annul that, the forward reaction is favoured leading to increase in concentration of of the products and decrease in reactants.