Answer:
chemistry wow
Explanation:
Please Answer Giving Brainleist
What gas in the air is used by plants to make their own food?
A) Nitrogen
B) Water vapor
C) Carbon dioxide
D) Oxygen
Answer:
C) Carbon dioxide is the answer.
Answer:
C. Carbon Dioxide
Carbon is absorbed by plants and chemically converted to oxygen via photosynthsis.
Hope this helps!
why does a mole of silicon weigh a different amount than a mole of carbon?
Answer:
[tex]\boxed {\boxed {\sf Different \ amount \ of \ protons, neutrons, \ and \ electrons}}[/tex]
Explanation:
Remember that a mole is equal to Avogadro's number: 6.022*10²³ atoms. Also, remember that an atom is made up of protons, neutrons, and electrons. Each element has a different amount of each.
If an element has more of these particles in 1 atom, then the atomic mass will be greater, ultimately making the molar mass (mass of 1 mole) greater.
Silicon has 14 protons, electrons, and neutrons, making its atomic mass 28.085 amu and its molar mass 28.085 grams. However, carbon only has 6 of each particle, so its atomic mass is smaller at 12.011 amu and molar mass is 12.011 grams.
assign an oxidation number to each element in the following species. H2O
Answer:
the oxidation number of hydrogen is +2, while oxygen is -2
How many grams of NaOH (MW = 40.0) are there in 500.0 mL
of a 0.175 M NaOH solution?
A) 3.50
B) 114
C) 14.0
D) 2.19x10
Answer:
3.5
Explanation:
500*0.175= 8.75 *40/1000=3500/1000=3.5
Answer:
3.50 grams
Explanation:
Mastering chem
how many moles are in 83 particles of sodium chloride?
Answer:
there are 1.4201927800478769 moles in 83 particles of sodium chloride. or 1.42 for short.
Explanation:
Helpppp me pleaseeee now I’ve been struggling so bad w this
Answer:
I don't know what the passage says, but I feel like the most logical conclusion is D or the last one.
Explanation:
Answer:
D! Hope this helps! Figured id help with all of ur questions!
Explanation:
Im a wiz at science! ;)
Hard water contains relatively large concentrations of
A. Magnesium ions
B. Calcium ions
C. Iron ions
D. All of these ions
Answer:
I think the answer is All of these ions
3
1 point
The formula for acetic acid is HC H302
What is the percent composition of carbon in acetic acid?
molar mass of the element you need to find a percentage of
molar mass of the entire substance
40.0%
20.0%
33.3
41.4%
Previous
A gas has a volume of 590 mL at a temperature of –55.0°C. What The temperature be if the volume expands to 15L at constant pressure?
Answer:
5542.37 K
Explanation:
Given that,
Initial volume, V₁ = 590 mL
Initial temperature, T₁ = -55°C = -55 + 273 = 218 K
Final volume, V₂ = 15 L
We need to find the final temperature of the gas. The relation between the volume and the temperature is given by :
[tex]\dfrac{V_1}{T_1}=\dfrac{V_2}{T_2}[/tex]
Where
T₂ is final volume of the gas
Put all the values in above relation,
[tex]T_2=\dfrac{V_2T_1}{V_1}\\\\T_2=\dfrac{15\ L\times 218\ K}{590\times 10^{-3}\ L}\\\\T_2=5542.37\ K[/tex]
So, the required temperature is equal to 5542.37 K.
What is the pressure (in atm) in a 5.00 L tank with 9.00 grams of oxygen gas at 350 K?
Answer:
1.61 atm
Explanation:
Using general gas law equation as follows:
PV = nRT
Where;
P = pressure (atm)
V = volume (L)
n = number of moles (mol)
R = gas law constant (0.0821 Latm/molK)
T = temperature (K)
From the information provided in this question,
V = 5.00L
T = 350K
mass of O2 = 9.00g
Using mole = mass/molar mass
Molar mass of O2 = 16(2) = 32g/mol
mole = 9/32
mole = 0.28mol
Using PV = nRT
P = nRT/V
P = 0.28 × 0.0821 × 350/5
P = 8.0458/5
P = 1.609
Pressure = 1.61 atm
The pressure of the oxygen gas at the given temperature and volume is 1.61 atm.
The given parameters;
volume of the gas, V = 5 Lmass of the oxygen gas, m = 9 gtemperature of the gas, T = 350 KThe number of the moles of the given gas is calculated as follows;
[tex]moles = \frac{m}{M} \\\\moles = \frac{9}{32} \\\\moles = 0.28 \ mol[/tex]
The pressure of the gas is calculated as follows;
[tex]PV = nRT\\\\P = \frac{nRT}{V} \\\\P = \frac{0.28 \times 0.0821 \times 350}{5} \\\\P = 1.61 \ atm[/tex]
Thus, the pressure of the oxygen gas at the given temperature and volume is 1.61 atm.
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What is the percent yield of LiCl if I produced 30.85g LiCl and my theoretical yield was calculated to be 35.40g LiCl?
Answer:
87.15%
Explanation:
To find percent yield, we can use this simple equation
[tex]\frac{Actual}{Theoretical} *100[/tex]
Where "Actual" is the amount in grams actually collected from the reaction, and "Theoretical" is, well, the theoretical amount that should have been produced.
They give us these values, so to find the percent yield, just plug the numbers in.
[tex]\frac{30.85}{35.40} *100\\\\ =87.15[/tex]
So, the percent yield is 87.15%
An easy trick to remember how to do this is just to divide the smaller number by the bigger number and move the decimal back two places. If you have a percent yield greater than 100%, something is wrong in the reaction.
why pie bond are not perticipate in hybridaization
the exact position of the electrons of an atom cannot be determined because they are in constant ___
Choose the larger atom from each of the following pairs.
a. Between Se and Te, the larger atom is __________
b. Between I and Kr, the larger atom is ________
c. Between P and Pb, the larger atom is _______
d. Between Ge and Br, the larger atom is___________
e. Between G e and B r, the larger atom is _________
1. Se
2. Kr
3. S
4. C
Answer:
C, between P and Pb, largest atom is Pb
The larger atom from each of the following pairs is as,
a. Between Se and Te, the larger atom is Te .
b. Between I and Kr, the larger atom is I .
c. Between P and Pb, the larger atom is Pb .
d. Between Ge and Br, the larger atom is Ge .
e. Between G e and B r, the larger atom is Ge .
How atomic size of elements vary in periodic table?In periodic table, on moving from top to bottom in a group the atomic size of elements increases while on moving left to right in a period the atomic size of elements decreases.
To learn more about periodic table here.
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A student pours 800.0 mL of a 3.000 molar solution of sodium hydroxide into a 2.00 liter volumetric flask and fills the flask up with water. What is the new molarity of the solution?
5 points
12.00 M
1.20 M
14.00 M
0.0750 M
what is elimination reaction
Which category is our Sun located?
Question 2 options:
White Dwarfs
Supergiants
Giants
Main Sequence
Answer:
main sequence is the correct answer of your question
The sun is located in the main sequence in the solar system of the universe. Option D is correct.
What is a solar system?The solar system is a gravitational bound system that consists of some planets like the moon, earth, Neptune, venus, mars, mercury, Saturn, and Uranus these revolve around on the orbit of space.
The sun is the center of all the planets that is all planets revolve around the sun only as it is the biggest star for all the planets and the majority of the mass of the planet is the sun only.
Therefore, Option D is the correct sun located in the main sequence in the solar system of the universe.
Learn more about the solar system, here:
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help me please i beg u
Answer:
none of the above
Explanation:
Conduction is the transfer of energy by the movement of currents. ture or false
conduction is the transfer of energy by the movement of currents(it is true)
Answer:
false
Explanation: Its actually Convection
Hydrogen burns exothermically in oxygen
What is the energy given out during the reaction: 2H2 + O2 -> 2H2O?
Given:
H-H bond: 436 kJ/mol
O=O double bond: 498 kJ/mol
O-H bond: 464 kJ/mol
A. -3226 kJ/mol
B. -884 kJ/mol
C. -486 kJ/mol
D. -442 kJ/mol
Answer:
C. -486 kJ/mol
Explanation:
Enthalpy change equals bonds broken (reactants) minus bonds formed (products)
Bonds broken = 2 H-H bonds + 1 O=O double bond = 2(436) +498 = 1,370 kJ/mol
Bonds formed = 4 O-H bonds = 4(464) = 1,856 kJ/mol
Bonds broken - bonds formed = 1,370 - 1,856 = -486 kJ/mol
For the reaction shown, drsw the major(s) expected product.
Answer:
2
Explanation:
Please please help me
Answer:
I agree with Omar because it depends on what the charge of the object and magnet is. If the magnet is negative and the object is positive, they will pull together. If the magnet is negative and the object is negative then they will pull apart.
Explanation:
If you are given 64.0 grams of CH4, how many grams of H2O are made
Answer:
144 g of H₂O.
Explanation:
We'll begin by writing the balanced equation for the reaction. This is given below:
CH₄ + 2O₂ —> CO₂ + 2H₂O
Next, we shall determine the mass of CH₄ that reacted and the mass of H₂O produced from the balanced equation. This can be obtained as follow:
Molar mass of CH₄ = 12 + (4×1)
= 12 + 4 = 16 g/mol
Mass of CH₄ from the balanced equation = 1 × 16 = 16 g
Molar mass of H₂O = (2×1) + 16
= 2 + 16 = 18 g/mol
Mass of H₂O from the balanced equation = 2 × 18 = 36 g
SUMMARY:
From the balanced equation above,
16 g of CH₄ reacted to produce 36 g of H₂O.
Finally, we shall determine the mass of H₂O produced by the reaction of 64 g of CH₄. This can be obtained as follow:
From the balanced equation above,
16 g of CH₄ reacted to produce 36 g of H₂O.
Therefore, 64 g of CH₄ will react to produce = (64 × 36)/16 = 144 g of H₂O.
Thus, 144 g of H₂O were obtained from the reaction.
plz someone help me i dont get this and i need to finish this
Answer:
The height of A is 900
Explanation: Beside A, there is a number which explains what the height is so the answer is A.
Part A
Choose the paramagnetic species from below.
O He
O Te
O T14+
O All of the above are paramagnetic.
None of the above is paramagnetic.
Answer:
o He
Explanation:
basyshsiz0qnshshhsjzz
How is this effect of dissolved
substances important in nature?
Explanation:
Water is called the "universal solvent" because it is capable of dissolving more substances than any other liquid. This is important to every living thing on earth. It means that wherever water goes, either through the air, the ground, or through our bodies, it takes along valuable chemicals, minerals, and nutrients.
Photosynthesis in a plant is an example of which characteristic of living things?
1. Reproduction
2. Response to the environment
3. Growth and development
4. Ability to obtain and use energy
Answer:
4. Ability to obtain and use energy16. What is the typical diameter of an atom?
A. | 10-14 m
B. I x 10-12 m
C. | 10-10 m
D. | x 10-8 m
HELPP PLSS
An __________ includes all living and non-living things in an environment.
Answer:
an ecosystem
Explanation:
it compromises of living and non living things in an environment.
How many moles of Ag can be obtained from 2.77 moles Cu using the following
balanced reaction?
2AgNO3
+ Cu
Cu(NO3)2
+ 2Ag
Answer:
2.77×2= 5.4 mol Ag can be obtained