Answer:
Carbon dioxide is composed of one carbon atom covalently bonded to two oxygen atoms. It is a gas (at standard temperature and pressure) that is exhaled by animals and utilized by plants during photosynthesis. Carbon dioxide, CO2, is a chemical compound composed of two oxygen atoms and one carbon atom
Explanation:
Answer:
Carbon dioxide is composed of one carbon atom covalently bonded to two oxygen atoms. It is a gas (at standard temperature and pressure) that is exhaled by animals and utilized by plants during photosynthesis. Carbon dioxide, CO2, is a chemical compound composed of two oxygen atoms and one carbon atom.
Explanation:
hope this help
pick me as the brainliest
How many oxygen atoms does 1 mol of 02 gas have?
Answer:
two oxygen atoms
Explanation:
One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.
Answer:
2 * (6.02 * 10^23)
Explanation:
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Which factor affects a solute's solubility rather than its rate of solution? A. Nature of the solvent B. Size of solute particles c. Amount of solute particles D. Shaking of the solvent
i took the test and it is a
Explanation:
because
Answer:
its a
Explanation:
explain why benzoic acid is insolube in water at room temperature but is soluble in 2.5M NaOH solution
Answer:
It is known generally that polar compounds are soluble in polar solvents. Based on the structure of benzoic acid, it comprises the non-polar C6H6 group and polar COOH group. Based on the structure, in benzoic acid, the nonpolar hydrocarbon outweighs and influences the polar part as nonpolar, due to which benzoic acid is not soluble in water.
On the other hand, benzoic acid produces sodium salt benzoic acid when it reacts with 2.5 M sodium hydroxide, this salt is ionic. Generally, the ionic compounds are soluble in water. Therefore, the salt of benzoic acid gets dissolved in water. Hence, benzoic acid is soluble in the solution of sodium hydroxide.
How many moles are in 68 grams of Mg(OH)
Answer:
1.16 mol
Explanation:
Given data:
Mass in gram Mg(OH)₂ = 68 g
Number of moles of Mg(OH)₂ = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of Mg(OH)₂ = 58.32 g/mol
By putting values,
Number of moles = 68 g/ 58.32 g/mol
Number of moles = 1.16 mol
A kind of decomposition reaction that requires a catalyst is
Combustion
Electrolysis
Catalytic
Thermal
Oxidizer
Answer:
The answer is Catalytic
the picture shows a scientist collecting data from an ice core whats the answer giving brainliest
Answer:
c
Explanation:
Gas change and climate change are very similar and thats why its c
Answer:
C
Explanation:
help pls this is rocks and minerals fell free to zoom in!!!
Answer:rocks
Explanation:
draw two lewis structures for a compound with the formula c2h6o and compare the boiling points of the two molecules
Answer:
See explanation and images attached
Explanation:
There are two compounds that could have molecular formula of C2H6O, they are ethanol and methoxy methane (trivial name: methyl ether). The structures of the two compounds are shown in the image attached as obtained from quora.
The boiling point of methoxymethane is -24.8°C while that of ethanol is about 78.5°C. The reason for the high boiling point of ethanol is the presence of intermolecular hydrogen bonding leading to a stronger intermolecular interaction compared to methoxymethane molecules held together only by very weak dispersion forces.
The Lewis structures of ethanol and methoxymethane are attached below.
Ethanol (C₂H₆O) and methoxymethane (CH₃OCH₃) are both organic compounds, but they have different molecular structures and intermolecular forces, which can affect their boiling points.
Due to the presence of hydrogen bonding in ethanol, its boiling point is significantly higher compared to methoxymethane. The boiling point of ethanol is around 78.3°C (173°F), while the boiling point of methoxymethane is approximately -24.8°C (-12.6°F). The difference in boiling points arises from the stronger intermolecular forces, namely hydrogen bonding, present in ethanol.
Learn more about Lewis's structure, here:
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Plzzz figure out at least the first one
If a cat goes meow what does that mean?
Answer: HHHHHHHHHHHHHHHHHHHHHHAHAHHAHAHHAHHAHHAHHAHHAHAHAHHHAHAHAHHAHAHHA
DON"T KNOW?
Explanation:
2.
and chemical equation
k. Molarity, normality, molality and formality
What mass of CH4 in grams, is required to react with 96.0 grams of O2?(2points)
S. A 15.6 g sample of benzene is mixed with excess nitric acid. We isolate 18.0 g of
C6H5NO2. What is the percent yield of C6H5NO2 in this reaction? (2points)
4. Calculate the volume of a 0.225 M solution of potassium hydroxide, KOH,
required to react with 0.215 g of acetic acid, CH3COOH? (2points)
5. An excess of AgNO3 reacts with 185.5 mL of an AlCl3 solution to give 0.325 g
of AgCl. What is the concentration, in moles per liter, of the AlCl3 solution?
(2 points)
6. Calculate the volume of pure water that used to dilute 100. mL of 12 M NaOH to
4.75 M. (2points)
3
2 16
&
Answer:
See explanation
Explanation:
2)CH4 + 2O2 -------> CO2 + 2H2O
96g of O2 = 96g/32g/mol = 3 moles of O2
If 1 mole of CH4 reacts with 2 moles of O2
x moles of CH4 reacts with 3 Moles of O2
x = 3/2 = 1.5 moles of CH4
Mass of CH4 = 1.5 moles * 16 = 24 g of CH4
3)C6H6 + HNO3 ---->C6H5NO2 + H2
Number of moles in 15 g of benzene = 15 g/ 78 g/mol = 0.19 moles
Number of moles of 18 g of C6H5NO2 = 18g/123 g/mol = 0.15 moles
From the reaction equation;
1 mole of C6H6 yields 1 mole of C6H5NO2
Hence 0.19 moles of C6H6 also yields 0.19 moles of C6H5NO2
% yield = actual yield/ theoretical yield * 100
actual yield = 0.15 moles
Theoretical yield = 0.19 moles
% yield = 0.15/0.19 * 100
% yield = 78.9%
4)The reaction equation is
KOH + CH3COOH ------> CH3COOK + H2O
number of moles of acetic acid reacted = 0.215g/60 g/mol = 3.58 * 10^-3 moles
Since the reaction is 1:1, 3.58 * 10^-3 moles moles of KOH is used.
But;
n = CV
n = number of moles
C = concentration of reactants
V = volume of solution
V = n/C
V= 3.58 * 10^-3 moles/0.225M = 0.016 L
5) 3AgNO3 + AlCl3 -----> Al(NO3) + 3AgCl
Number of moles in 0.325 g of AgCl = 0.325g/143 g/mol = 2.27 * 10^-3 moles
From the reaction equation;
1 mole of AlCl3 yields 3 moles of AgCl
x moles of AlCl3 yields 2.27 * 10^-3 moles of AgCl
x = 2.27 * 10^-3 moles/3
x = 7.6 * 10^-4 moles
From;
n = CV
C = n/V
C = 7.6 * 10^-4 moles * 1000/185.5
C= 4.1 * 10^-3 MolL-1
6)From;
C1V1 =C2V2
Where;
C1 = initial concentration
V1= initial volume
C2= final concentration
V2= final volume
100 * 12 = 4.75 * V2
V2 = 100 * 12/4.75
V2 = 252.6 ml
Volume of water added = 252.6 - 100 = 152.6 ml of pure water
Many first aid kits include an instant cold pack. A cold pack utilizes a chemical reaction that has a significant change in energy in order to make the pack feel cold. Explain which type of reaction, an endothermic reaction or an exothermic reaction, would be most useful for making a cold pack.
Answer:
Endothermic reaction
Explanation:
A cold pack is used as a cold compress in order to numb pain caused by minor injuries. it is useful in first aid treatment of bruises, sprains, cuts and burns in addition to the application of a bandage.
A cold pack functions by absorbing heat away from the surrounding thereby decreasing the temperature and making the surface to feel cool. This is an endothermic reaction.
In an endothermic reaction, heat is absorbed from the environment and the reaction surface feels cool. Hence, an endothermic reaction is most useful in making a cold pack because the product of the endothermic reaction will feel cool to touch making it suitable to be used as a cold pack in first aid.
A sealed balloon containing 0.51 L of air is carried from Toronto (P-1.01 atm) to Whistler (P=0.78 atm). What would the volume of the bag be in L) upon arrival in Whistler ?
Assume constant temperature and ideal gas behaviour.
Write your answer with 2 significant figures. Enter the number only - do not enter units.
The volume of the bag would be in (L) upon arrival in Whistler : 0.66
Further explanationBoyle's Law
At constant temperature, the gas volume is inversely proportional to the pressure applied
[tex]\rm p_1V_1=p_2.V_2\\\\\dfrac{p_1}{p_2}=\dfrac{V_2}{V_1}[/tex]
V₁=0.51 L
P₁=1.01 atm
P₂=0.78 atm
[tex]\tt V_2=\dfrac{P_1.V_1}{P_2}\\\\V_2=\dfrac{1.01\times 0.51}{0.78}\\\\V_2=0.66[/tex]
What will happen when a piece of magnesium metal is dropped into a beaker containing a l M solution of copper(1) chloride?
Mg2+ + 2e = Mg(9) P = - 2.37 V
Cu2+ + 2e → Cu(9) ° = + 0.34 V
A. The magnesium will dissolve but nothing else will happen.
B. The magnesium will dissolve and the copper will be deposited
C. The copper will dissolve and the magnesium will be deposited
D. The magnesium will dissolve and chloride gas will be produced E. There will be no reaction,
Answer:
Did you get the answer to this?
Explanation:
I need this too.
if water does break down by electrolysis to form a new substance what might form
Answer:
When an electric current is passed through liquid water (H2O), it changes the water into two gases—hydrogen and oxygen. The molecules of water break apart into individual atoms.
hope this helps
Which description refers to cirrus clouds?
are fluffy
are wispy
produce snow
form at low altitudes
Answer:
I think ur answer would be B or are wispy
Explanation:
hope this helps <3
The description that refers to cirrus clouds is : ( B ) Are wispy
What are Cirrus cloudsCirrus clouds are white, short, detached clouds that look like human hair, they are found mainly at high altitudes and appear wispy looking like a turf of hair. They are the whitest of all clouds but may take the color of the sunset.
Therefore we can conclude that the description that refers to cirrus clouds is that they are wispy.
Learn more about cirrus clouds : https://brainly.com/question/3586202
Select all that apply.
In two molecules of carbon dioxide (2CO2), there are _____.
two atoms of oxygen
two atoms of carbon
four atoms of carbon
four atoms of oxygen
Answer: In two molecules of carbon dioxide (2CO2), there are _____.
two atoms of carbon
four atoms of oxygen
Propose the structure of the following HNMR data.
chemical shift ppm splitting integration
3.7 t 2.0
1.75 m 2.0
1.0 t 3.0
mol.formula:C3H7Cl
Answer:
1-Chloropropane is likely the answer (attached a picture)
Explanation:
First off there are 3 peaks and 3 carbons which indicates to me that this will be a chain without any symmetry and that each carbon has hydrogens on it.
Second the triplet at 1.0 that integrates to 3 likely correlates to a CH3 (methyl) group. Peaks are very upfield triplets that integrate to three are almost always methyl peaks.
Third the triplet at 3.7 is indicative of being next to the halogen. Hydrocarbons by themselves do not have peaks that far downfield meaning that its shift could only be explained by the chlorine being involved. Also we know that this can't be next to the methyl group since its multiplicity is to low to be next to it.
That leaves the multiplet at 1.75 being the hydrogens on the middle carbon which also makes sense since it is more downfield then the methyl group (due to being closer to the chlorine) but is not far enough downfield to say the chlorine is there. It also makes sense that it is a multiple since it would be a hextet due to the adjacent 5 hydrogens which can't always be resolved.
I hope this helps and let me know if anything is unclear or needs further explanation.
In the diagram below, particles of the substance are moving from the liquid phase to the gas phase at the same ra
as they move from the gas phase to the liquid phase.
The gas and liquid are at
O equilibrium.
O a high vapor pressure.
O a low vapor pressure.
O zero vapor pressure.
Mark
Answer:
The gas and liquid are at equilibrium
NEED HELP ASAP WILL MARK BRAINLY PLS HURRY I DONT HAVE LONG
Is this a scientific model? Use complete sentences to explain why or why not. (5 points) A graphic organizer showing the water cycle
Answer:
Yes it is, because scientist use this to demostrate the water cycle
Explanation:
2. How many moles of HI would be necessary to react with 0.5 moles of Mn? 2Mn + 6HL - 3H, + 2Mnl,
Answer:
gfxshsfh5eyggs
shtrsgrtgdshs
Explanation:
dfhdhnfxgnfgbc. wrgsfd sh srtwe5yr
Can someone explain were do they get the number 2.99 and 10^8?
Answer: In standard decimal notation, the speed of light is 299,800,000.0 meters per second. In scientific notation this is written as 2.998x108 meters per second, meaning that the true position of the decimal point is 8 digits to the right. In this case, that means filling in the empty spots with zeros.
Hope it helped
A reaction at evolves of boron trifluoride gas.Calculate the volume of boron trifluoride gas that is collected. You can assume the pressure in the room is exactly . Round your answer to significant digits.
Answer:
3.10 L
Explanation:
A reaction at 11.0°C evolves 133.mmol of boron trifluoride gas. Calculate the volume of boron trifluoride gas that is collected. You can assume the pressure in the room is exactly 1 atm. Round your answer to 3 significant digits.
Step 1: Convert the temperature to the Kelvin scale
When working with gases, we must use the absolute temperature scale. We can convert the temperature from Celsius t Kelvin using the following expression.
K = °C + 273.15
K = 11.0°C + 273.15
K = 284.2 K
Step 2: Convert the amount of matter to moles
We will use the conversion factor 1 mol = 1000 mmol.
133 mmol × (1 mol/1000 mmol) = 0.133 mol
Step 3: Calculate the volume of boron trifluoride gas
We will use the ideal gas equation.
P × V = n × R × T
V = n × R × T / P
V = 0.133 mol × (0.0821 atm.L/mol.K) × 284.2 K / 1 atm
V = 3.10 L
How do organisms like humans grow?
by increasing the number of organs
by increasing the size of their organelles
by increasing the size of cells
by increasing the number of cells
Two solutions initially at 24.60°C are mixed in a coffee cup calorimeter. when a 100.0 ml volume of 0.100 m AgNO3 solution is mixed with a 100.0 ml sample of 0.200 m nacl solution, the temperature in the calorimeter rises to 25.30°C. Determine the dh for the reaction as written below. Assume that the density and heat capacity of the solutions is the same as that of water.
NaCl(aq)+AgNO3(aq) → AgCl(s)+NaNO3(aq)
a. -69 kJ
b. -35 kJ
c. -16 kJ
d. -250 kJ
Answer:
= - 59.7 kJ/mol
Explanation:
From the given information:
no of moles of AgNO3 = 100/1000 × 0.100 = 0.01 mol
no of moles of NaCl = 100/1000 × 0.200 = 0.02 mol
The total volume of the solution is:
= (100 + 100 ) mL
= 200 mL
mass of the solution = 200 × 1.00 = 200 g
Heat gained by the solution:
= mass × specific heat × temperature change in solution
= 200× 4.184 × (25.3 - 24.6)
= 585.76 J
Heat gained by calorimeter
= heat capacity × change in temperature of caiorimeter
= 15.5 × (25.3 -24.6)
= 10.85 J
Thus, total heat released = total heat gained
Q = 585.76 + 10.85 J
Q = 596.61 J
From above, it is obvious that AgNO3 is the limiting reagent
∴
ΔH_{rxn} = total heat released/ moles of AgNO3
= -596.61/0.01
= 59661 J/mol
= - 59.7 kJ/mol
An open pot of water is heated on the stove. As the water boils, the molecules____________?
Answer:
the molecules . . . separate and eventually evaporate into gas.
Explanation:
Consider the equilibrium system described by the chemical reaction below, which has a value of Kc equal to 1.87 × 10⁻³ at a certain temperature. If 5.00 g of solid PH₃BCl₃ and 0.0700 g of BCl₃ are added to a 4.500 L reaction vessel, what will the equilibrium concentration of PH₃ be? SO CONFUSED BE VERY SPECIFIC especially WITH FINDING Qc.
Answer:
[PH₃(g)] = 0.0432M at equilibrium
Explanation:
Given: PH₃BCl₃(s) => PH₃(g) + PH₃(g); Kc = 1.87 x 10⁻³
*Let solids have concentration value = 1.0M and apply common ion (compound) effect to Ci b/c of 0.070g BCl₃ added initially.
PH₃BCl₃(s) => BCl₃(g) + PH₃(g
Ci: 5.00g 0.07g 0.00g
*≅1.0M(s) =0.07g/115.81g·mol⁻¹
= 6 x 10⁻⁶ mol
= 6 x 10⁻⁶mol/4.5L
= 1.3 x 10⁻⁴M = 0.00M
ΔC: -x +x +x
Ceq: 1M - x ≅ 1M = (1.3 x 10⁻⁴ + x)M = x
Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + x)(x) = 1.87 x 10⁻³
=> 1.3 x 10⁻⁴·x + x² = 1.87 x 10⁻³
=> x² + 1.3 x 10⁻⁴·x + 1.87 x 10⁻³ = 0
=> x = -b ± [Sqrt(b² - 4ac)] / 2a
=> x = -1.3 x 10⁻⁴ ± Sqrt[(1.3 x 10² - 4(1)(1.87 x 10⁻³)] / 2(1)
=> x = 0.0432M in PH₃ at equilibrium
Check:
Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + 0.0432)(0.0432) = 1.87 x 10⁻³ (QED)
What happens to matter when it reaches absolute zero?
which climate is most likely found in a high pressure belt ty
Answer: Desert i do the quiz and it's corect
HELP!!
In the EXPLORE section of your lesson 4.08 on Potential energy there were several animations to watch that provided a graphic illustrating how the PE and KE in a system changed as skateboarder rides a pipeline or a pendulum moves, why did the bar for the total energy remain constant?
Question 1 options:
A. Because these models do not take into account the impact of friction and air resistance and are helping to solidify the concept of energy conservation and that the total mechanical energy remains constant in that model.
B. This is because no energy is being created or destroyed in this system.
C. Energy is converted from kinetic to potential and potential to kinetic, but the total amount of energy is conserved.
D. all answers given are correct
Answer: In physics, potential energy is the energy held by an object because of its position relative to other objects, stresses within itself, its electric charge, or other factors.
Explanation:
