Answer:
The answer is oxygen and silicon
Explanation:
I took the test and it was right
The answer is oxygen and silicon
CO2 + H2O → H2CO3. If 495 milliliters of carbon dioxide at 25°C and 101.3 kilopascals reacts with excess water, what is the theoretical yield of carbonic acid?
Answer:
The theoretical yield of carbonic acid is 1.24 grams.
Explanation:
The balanced equation for the formation of carbonic acid by the reaction of carbon dioxide with water is:
CO₂ + H₂O → H₂CO₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of reactant and product participate:
CO₂: 1 moleH₂O: 1 moleH₂CO₃: 1 moleAn ideal gas is characterized by three state variables: absolute pressure (P), volume (V), and absolute temperature (T). The relationship between them constitutes the ideal gas law, an equation that relates the three variables if the amount of substance, number of moles n, remains constant and where R is the molar constant of the gases:
P * V = n * R * T
Moles of carbon dioxide can be calculated using ideal gas law equation. In this case:
P= 101.3 kPa= 1 atmV= 495 mL= 0.495 L (being 1,000 mL=1 L)n=?R= 0.082 [tex]\frac{atm*L}{mol*K}[/tex]T= 25 C= 298 K (being 0 C=273 K)Replacing:
1 atm* 0.495 L= n* 0.082 [tex]\frac{atm*L}{mol*K}[/tex] *298 K
Solving:
[tex]n=\frac{1 atm*0.495 L}{0.082\frac{atm*L}{mol*K}*298 K }[/tex]
n= 0.02 moles
Then, by reaction stoichiometry 0.02 moles of carbon dioxide produces 0.02 moles of carbonic acid.
Since the molar mass of carbonic acid is 62.03 g/mol, then you can apply the following rule of three: if there are 62.03 grams in 1 mole, how much mass is there in 0.02 moles?
[tex]mass=\frac{0.02 moles*62.03 grams}{1 mole}[/tex]
mass= 1.24 grams
The theoretical yield of carbonic acid is 1.24 grams.
please help me ill give brainliest if right
Answer:
3000kg
Explanation:
Given parameters:
Speed = 20m/s
Kinetic energy = 600000J
Unknown:
Mass = ?
Solution:
Kinetic energy is the energy due to the motion of a body.
It is expressed as;
K.E = [tex]\frac{1}{2}[/tex] m v²
m is the mass
v is the speed
Now find m;
600000 = [tex]\frac{1}{2}[/tex] x m x 20²
600000 = 200m
m = 3000kg
140 g of apple contains about
80 Calories (C) of energy. How many
grams of apples would you need to eat
to consume 360 Calories?
How many grams of apple would you need to eat and consume 360 calories
Answer:
630 grams
Explanation:
140/80 = 1.75
360 times 1.75 = 630
what would you need to do to calculate the molarity of 10g of NaCl in 2kg of water?
A. convert the 10 g of NaCl to Kg of NaCl
B. Convert the 10g of NaCl to moles of NaCl
C. Convert the 2kg of water to liters of water
D. Convert the 2kg of water to moles of water
Answer:
B) we will convert the 10 g of NaCl into moles.
Explanation:
Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.
Formula:
Molarity = number of moles of solute / L of solution
we will convert the 10 g of NaCl into moles.
Number of moles of NaCl:
Number of moles = mass/molar mass
Number of moles = 10 g/ 58.44 gmol
Number of moles = 0.17 mol
1 Kg = 1 L
Molarity = 0.17 mol / 2 L
Molarity = 0.085 mol/L
Molarity = 0.085 M
Answer:
B. Convert the 10g of NaCl to moles of NaCl
whats the answer giving brainliest :))))
Answer:
D
Explanation:
Because B and C are talking about the climate. And A is just saying something general about the climate! :)
Answer:
d
Explanation:
Naturally occurring rubidium consists of just two isotopes. One of the isotopes consists of atoms having a mass of 84.912 amu; the other of 86.901 amu. What is the percent natural abundance of the heavier isotope
Answer:
The percent natural abundance is 27.95% for the heavier isotope (86.901 amu)
Explanation:
The atomic mass of Rubidium (Rb) is 85.468.
To find the percent natural abundance, first we need to use the following equation:
84.912x + 86.901(1-x) = 85.468
x represents the percent natural abundance, in basic decimal form
In order to find x, we will use the distributive property, combine like terms and then move the constant to the other side to get x.
We are first finding the percent natural abundance of the first isotope to make this easier for us.
84.912x + 86.901(1-x) = 85.468
-> 84.912x + 86.901- 86.901x = 85.468
-> 86.901 - 1.989x = 85.458 (like terms were combined)
-> Subtract both sides by 86.901
-> Divide both sides by-1.989x
x = 0.720462544
Now turn this into a percent by multiplying by 100.
--> 72.05% for the first isotope (the one that contains 84.912 amu)
To find the natural abundance of the other isotope (the denser, heavier isotope), you could just subtract 72.05 from 100 to save time, but the usually desired way (the way that your teacher would probably want you to do) is down below:
We plug this decimal for the x-value into the parentheses from earlier:
(1 -x) ---> ( 1 - 0.720462544 ) = 0.279537456
Now we just need to convert this to a percent by multiplying by 100
0.279537456 * 100 = 27.95% of the heavier isotope (86.901 amu)
An atom with 5 protons, 6 neutrons, and 5 electrons has an atomic mass of __amu. (Enter a whole number.
Numerical Answers Expected!
Answer for Blank 1:
Answer:
3
Explanation:
A current of 1.5A was passed through two electrolytes arranged
in series for 10 minutes and 2.16 g of silver deposited on the cathode
of the first cell. (Atomic wt. of Ag=108 ,Ni =59) .Calculate
a) The quantity of electricity that passes through the two cells.
b) The amount of Nickel deposited on the cathode of the second cell
containing Nickel(II) nitrate, Ni(NO3)2 ?
Answer:
0.59 g
Explanation:
The reaction at the first cathode;
Ag^+(aq) + e -----> Ag
if Q = It = 1.5 * 10 * 60 = 900C
According to Faraday's second law of electolysis; if we pass the same quantity of electricity through different electrolytes, the mass of substances deposited on each cathode is proportional to the equivalent weights.
Equivalent weight E = Atomic mass/valency
For Ag = 108/1 = 108
For Ni = 59/2 = 29.5
Hence
Let m1 = mass of Ag deposited =2.16
Let m2 = mass of Ni deposited
Let E1 = equivalent weight of Ag
Let E2 = equivalent weight of Ni
m1/m2 = E1/E2
2.16/m2 = 108/29.5
m2 = 2.16 * 29.5/108
m2 = 0.59 g
HELP!!!!!! 20 POINTS
step 2 on the performance task thing.
C) Judge the closeness of your trend line to the data points. Do you notice a relationship between the data points? (2 points)
D) Is the trend line linear? If so, write a linear equation that represents the trend line. Show your work.
I believe that the answer is C
If a sample of air in a closed, rigid container was heated, would the partial pressure of oxygen increase, decrease or remain the same?
Answer:
increase
Explanation:
To solve this problem, you simply have to apply the Ideal Gas Law. Using this equation, we know that the pressure is directly proportional to the temperature. Thus, as something is heated (i.e. its temperature is increasing), its pressure would increase as well.
How many moles are in 7.18x10^24 ions of mg
Answer:
11.93 molesExplanation:
To find the number of moles in a substance given it's number of entities we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question we have
[tex]n = \frac{7.18 \times {10}^{24} }{6.02 \times {10}^{23} } \\ = 11.92691...[/tex]
We have the final answer as
11.93 molesHope this helps you
The integumentary system functions to retain body fluids, protect against disease, eliminate waste products, and regulate body temperature. Which organelle performs the same function as the integumentary system?
Cell membrane
Mitochondria
Nucleus
Cell wall
The integumentary system functions to retain body fluids, protect against disease, eliminate waste products, and regulate body temperature. Cell membrane performs the same function as the integumentary system. Therefore, option A is correct.
What is cell membrane?The cell membrane performs a function that is similar to the integumentary system. The cell membrane is a thin, flexible layer that surrounds the cell and acts as a barrier between the cell and its external environment.
It helps to regulate the movement of substances in and out of the cell, maintain the balance of fluids and electrolytes, and protect the cell from harmful substances.
The cell membrane can also play a role in temperature regulation, as it helps to maintain the proper internal environment of the cell.
Thus, option A is correct.
To learn more about the cell membrane, follow the link:
https://brainly.com/question/13524386
#SPJ3
How many molecules of HCl would react with 1 mole of Mg0?
Mg0 +2HCI
MgCl, + H,0
Answer:
12.044 ×10²³ molecules of HCl
Explanation:
Given data:
Number of moles of MgO = 1 mol
Number of molecules of HCl react = ?
Solution:
Chemical equation:
MgO + 2HCl → MgCl₂ + H₂O
with 1 mole of MgO 2 moles of HCl are react.
Number of molecules of HCl react:
1 mole contain 6.022×10²³ molecules
2 mol × 6.022×10²³ molecules / 1 mol
12.044 ×10²³ molecules
Acids containing polyatomic ions are named according to the name of the anion. true or false
Answer:
true
Explanation:
Names for such acids consist of the prefix “hydro-“, the first syllable of the anion, and the suffix “-ic”. Complex acid compounds have oxygen in them. For an acid with a polyatomic ion, the suffix “-ate” from the ion is replaced with “-ic.”
The center atom of the CO 2 molecule corresponds to the notation
Answer:
simplest explanation regarding CO2 Molecular Geometry and hybridization. ... Carbon is the least electronegative that means it stays at the center
Explanation:
hope this helps
An atom of nitrogen would be stable if it bonded with how many atoms of chlorine?
Describe what has to happen when matter is heated by convection
Answer:
Here^
Explanation:
The matter starts heating, up as if it's ice , turns into a liquid.
Atoms was determined to be 143 picometers. What is the percent error of this measured value?
Answer:
9.1% error
Explanation:
Full Question:
A measured value for the atomic radius of platinum atoms was determined to be 143 picometers. What is the percent error of this measured value?Which ions aren't shown in net ionic reactions, because they are present as both reactants and products of the reaction, so they do not participate in the reaction?
Explanation:
This is correct!
Ions that exist in both the reactant and product side of the equation are referred to as spectator ions. Overall, they do not partake in the reaction. If they are present on both sides of the equation, you can cancel them out.
An example is;
Na+(aq) + Cl−(aq) + Ag+(aq) + NO3−(aq) → Na+(aq) + NO3−(aq) + AgCl(s)
The ions; Na+, NO3−(aq) would be cancelled out to give;
Cl−(aq) + Ag+(aq) → AgCl(s)
When a neutral atom gains or loses a proton, it becomes a(n)
*
Different Element
Isotope
lon
Neutral Atom
Answer:
Ion
Explanation:
I'm pretty sure yhi
(4.2 x 10^8) + (2.6 x 10^6) *
Answer:
4.226×10^8
Explanation:
4.2 ×10^8+2.6×10^6=422600000
or 4.226×10^8
Using the periodic table, choose the more reactive nonmetal.
Br or As
Answer:
Br
Explanation:
Please answer this question.
Mass of Helium = 4
Helium = 55 liters
How many moles = ?
_____________________________________SOLUTION:By the equation(AT S.T.P) of,
Moles = [tex]\frac{Given\ Volume}{22.4\ dm^3}[/tex]
Substitute the values,
Moles = [tex]\frac{55}{22.4}[/tex]
Simplify the fraction,
Moles = 2.5 grams/moles
_____________________________________Best Regards,'Borz'can u please answer this for me
Answer:
answer c
Explanation:
If you could show work
We need to balance the equation
[tex]\sf \bullet\quad H_2 + O_2 \longrightarrow H_2O [/tex]
By adding 2 moles of [tex]\sf H_2 [/tex] on the both sides
[tex]\sf \bullet \quad 2H_2+O_2 \xrightarrow{\;By\:balancing\;} H_2O[/tex]
Hence, balanced !
Please help me am stuck between "B" and "C"
Which of the following is the best example of a heterogeneous mixture?
A. Lemonade made of water, lemonade powder mix, and sugar.
B. An omelet made of scrambled eggs and cheddar cheese.
C. Trail mix made of raisins, peanuts, and chocolate candies.
D. A glass of ice water made of ice cubes and pure water.
Answer:
I think it's C
Explanation:
all the other ones are homogeneous because they are uniform and the same when mixed
a. lemonade is one color(yellow when mixed the same throughout)
b. omelet is scrambled together and the cheese and eggs melt together to be one
c.ice cubes and water are the same, both water
trail mix is the only different one made with different ingredients that standout
hetero- different (trail mix)
homo- same (lemonade)
What is a radio wave?
Answer:
Radio waves are a type of electromagnetic radiation best-known for their use in communication technologies, such as television, mobile phones and radios.
Calculate: (5.03 x 109) – (42.6 x 108) =
Answer: x108(5.03x−42.6)
Explanation: Factor 5.03x109−42.6x108
5.03x109−42.6x108
=x108(5.03x−42.6)
Using VSEPR theory which of the following would be the correct shape for nitrogen trifluoride?
Answer:
trigonal pyramidal
Explanation:
In NF3, the nitrogen atom is sp3 hybridized. Now we must remember that according to the VSEPR theory, the number of electron pairs in the valence shell of the central atom in a molecule determines its shape.
Here, the nitrogen atom is the central atom and its outermost shell is surrounded by four electron pairs - one lone pair and three bond pairs. This means that it has a tetrahedral electron pair geometry.
However, due to the lone pair, the three fluorine atoms are arranged in a trigonal pyramidal geometry. Hence the correct shape of the molecule is trigonal pyramidal.
10 points- plz help me..
A science class is at a frozen lake for a field trip, and they are experimenting with hockey pucks on the ice. A student says, "If I push harder on this hockey puck when I make it slide, then it will slide faster along the ice.”
What could the student add to make the statement a hypothesis?
A: dependent and independent variables
B: proof that the statement is true
C: examples of other objects on ice
D: explanations of why the puck slides faster
Answer:
the answer is D: explanations of why the puck slides faster
Explanation:
A Girl in Brainly Banned/Removed the answer i had put the first time, Brainly claims she removed my answer because i was violating community guidelines such as cheating or plagiarism. The reason for putting my answer was because i took a test, i got it right and i want other people to take a test and get the answer right. Im trying to help:).
so katie if your reading this, try next time to mind your own business
Answer:d
Explanation:
