Answer:
The rate of gas diffusion is directly proportional to temperature
Explanation:
The rate of gas diffusion is
a) directly proportional to square root of temperature
b) inversely proportional to the square root of density
c) directly proportional to pressure
d) inversely proportional time and square root of molecular mass
Thus, option A is correct
Can someone please help me on this
Answer:
it's none because the graph is decreasing like a milf so that why
Sam is visiting the desert. He is standing beside a cactus watching a
snake move across the sand. There is a lizard basking in the sun on a rock
nearby. Which of the following correctly identifies the biotic and abiotic
parts of the ecosystem?
Abiotic: Rock, Sand, Sun Biotic: Cactus, Lizard, Sam, Snake
Abiotic: Cactus, Rock, Sam Biotic: Lizard, Sand, Snake, Sun
Abiotic: Cactus, Rock, Sand, Sun Biotic: Lizard, Sam, Snake
Abiotic: Cactus, Lizard, Sam, Snake Biotic: Rock, Sand, Sun
Answer:
A
Explanation:
Rock sand sun arent living. cactus lizard sam and snake are living or biotic
What is the iupac name of CH3-O-CH2-CH2-CH3?
Answer:
The iupac name of CH3-O-CH2-CH2-CH3 is Methoxybutane.
(PLEASE HELP)
Analyzing the pros and cons of a decision can help you make a difficult choice. Which of the following is a pro associated with the use of hydropower as an energy source?
A. A large amount of energy can be released by a small amount of fuel.
B. The use of hydropower produces environmentally friendly waste products.
C. Hydropower is a renewable energy source.
D. The chemical reactions involved remove harmful substances from the air.
1. Hay un gas con 700 milímetros de Mercurio de presión en 922 ml de volumen a 20 grados Celsius. Calcula la temperatura final a 500 mm de mercurio con 451 ml.
2. un gas ocupa un gas ocupa 205 mililitros a 20 grados centígrados y 1,05 atm. Calcule el volumen final a 60 grados centígrados y 2,4 Atmósferas de presión.
3. tenemos 22 L de un gas a una temperatura de 220 K y una presión de 5 Atm, si se modifican la presión a 6.5 atm y la temperatura a 200 K, cuál será el volumen que obtenemos.
Answer:
püvinlbxyfsswgrxzvnnchcyv nkivtcdg
50 extra if correct !!
Which of the following describes continental drift?
A. A continent moves very slowly.
B. The inner core rotates quickly.
C. The outer core causes magnetism.
D. The types of animals on a continent change.
Answer:
A.
Explanation:
the gradual movement of the continents across the earth's surface through geological time.
Answer:
a
Explanation:
EASY 100 POINTS, WILL MARK BRAINLEST, 2 QUESTIONS, SHOW YOUR WORK OR NO POINTS
Answer:
Explanation:
1. Please provide the enthalpy info - I will work on it with the info
2.
i) Reaction a should be modified to match the number of S in equation:
2S + 2O2 -> 2SO2 deltaH = -370kJ
ii) Reaction b should be written reversely to match the reactants of SO2:
2SO2 + O2 -> 2SO3 deltaH = 256kJ
iii) Adding the equations together:
2S + 3O2 -> 2SO3
iv) Enthalpy of the combined reaction = -370+256 = -114kJ
It is negative so the reaction is exothermic.
Answer:
Explanation:
1 c. enthalpy change = enthalphies of formation of all products - enthalphies of formation of all reactants = -526.3 kcal/mol
1 d. C3H8(g) + 5 O2 (g) → 3 CO2 (g) + 4 H2O (l) ΔH = -526.3 kcal/mol
Thermal energy is a measure of the __________ of particles of matter. *
(subject is science I just cant change it right now)
Explain in terms of structure and bonding why carbon dioxide has a low boiling point and calcium carbide has a high boiling point
Answer:
See explanation
Explanation:
Let us consider the two compounds carefully. Carbon dioxide is purely a non-polar molecular compound while the bond between the C2^2- ion and Ca^2+ is ionic thereby making CaC2 an ionic compound.
Recall that ionic compounds have high melting and boiling points due to strong ionic interactions in the structure of the compound.
On the other hand, CO2 is a non-polar substance whose molecules are held together only by weak dispersion forces.
As a result of the reasons outlined above, carbon dioxide has a low boiling point and calcium carbide has a high boiling point.
Two water molecules are weakly attracted to each other when a slightly positive hydrogen atom in the first molecule is attracted to the slightly negative oxygen atom on the second molecule. What type of bond is this
What is the molecular weight (rmm) of NaOH?
40
20
50
60
Answer: A/40 it is actually 39.997 but since that is not an answer they rounded up
Explanation:
You have 11.27 moles of Cl2 gas. How many moles of NaBr do you need to completely undergo this reaction?
Answer:
22.54 moles of NaBr are needed
Explanation:
The reaction of Cl2 with NaBr occurs as follows:
Cl2 + 2NaBr → 2NaCl + Br2
Where 1 mole of Cl2 requires 2 moles of NaBr for a complete reaction
As in the problem, we have 11.27 moles of Cl2, the moles of NaBr required are:
11.27mol Cl2 * (2mol NaBr / 1mol Br2) =
22.54 moles of NaBr are needed1. How many times more acidic is Lemon Juice than apples?
container has 3 moles of gas with a volume of 60 liters and at a temperature of 250 K, Calculate the pressure inside the container in kPa
Answer:
103.9 KPa
Explanation:
From the ideal gas equation;
PV=nRT
From the parameters given;
P= ?
T=250 K
V= 60L
n=3
R=0.082 atmLK-1mol-1
P= nRT/V
P= 3 × 0.082 × 250/60
P= 1.025 atm
1 atm=101325 pascals
1.025 atm = 1.025 atm × 101325 pascals/1atm
= 103.9 KPa
Answer:
103.9kPa
Explanation:
To solve this question we must use the equation:
PV = nRT
P = nRT / V
Where P is pressure in atm
n are moles of the gas = 3mol
R is gas constant = 0.082atmL/molK
T is absolute temperature = 250K
V = 60L
P = 3mol*0.082atmL/molK*250K / 60L
P = 1.025atm
As 1atm = 101.325kPa
1.025atm * (101.325kPa / 1atm) = 103.9kPa
How can autoimmune diseases be dangerous?
Inicialmente una muestra de neón tiene un volumen de 2,50 L a 15 °C. ¿Cuál es la
temperatura en °C, cuando el volumen de la muestra cambia a cada uno de los
siguientes volúmenes, ¿manteniéndose la presión constante?
a. 5,0 L b. 1250 ml c. 7,50L d. 3550 ml
naoooooooo seiiiiiiiii !!!!!!!!!!!!!!
Why does the rate of the forward reaction increase when the surface area of a reactant is increased
?
When the surface area increases, the concentration of the substance increases, which reduces
the number of effective collisions.
When the surface area increases, the temperature of the system increases, which in turn
increases the number of effective collisions.
When the surface area increases, the density of the substance increases, which increases the
number of collisions.
When the surface area increases, the number of particle collisions increases, which in turn
increases the number of effective collisions.
definition of spirilla
don't write incorrect answer
Answer:
a bacterium with a rigid spiral structure,found in stagnant water and something causing disease
Is this an alpha or beta decay?
Answer:
In Alpha Decay the nucleus is split into 2 parts with one of these parts – the alpha particle – zooming off into space. The nucleus has its atomic number reduced by 2 and its mass number is reduced by 4 (2 protons and 2 neutrons are removed). In Beta Decay (minus) a neutron turns into a proton.
Explanation:
a gas with a volume of 20.0l at a pressure of 275 kpa is allowed to expand to a volume of 35.0l. what is the pressure in the container if the temperature remains constant?
1. 2.54 kPa
2. 157 kPa
3. 481 kPa
pls help ;(
Answer:
[tex]\boxed {\boxed {\sf 2. \ 157 \ kPa}}[/tex]
Explanation:
Since temperature remains constant, the only variables that change are volume and pressure. Therefore, we are using Boyle's Law. This states that the pressure is inversely proportional to the volume. The formula is:
[tex]P_1V_1=P_2V_2[/tex]
We know the gas starts with a volume of 20.0 liters at a pressure of 275 kPa. We can substitute these values into the left side of the formula.
[tex]275 \ kPa *20.0 \ L=P_2V_2[/tex]
We know the gas expands to a volume of 35.0 Liters, but we do not know the pressure.
[tex]275 \ kPa *20.0 \ L=P_2* 35.0 \ L[/tex]
Since we are solving for the new pressure, we must isolate the variable P₂. It is being multiplied by 35.0 Liters and the inverse of multiplication is division. Divide both sides by 35.0 L.
[tex]\frac {275 \ kPa * 20.0 \ L}{ 35.0 \ L}= \frac{P_2*35.0 \ L}{35.0 \ L}[/tex]
[tex]\frac {275 \ kPa * 20.0 \ L}{ 35.0 \ L}=P_2[/tex]
The units of liters cancel.
[tex]\frac {275 \ kPa * 20.0 }{ 35.0 }=P_2[/tex]
[tex]\frac {5500}{35.0} \ kPa= P_2[/tex]
[tex]157.142857 \ kPa=P_2[/tex]
The original measurements of pressure and volume have 3 significant figures, so our answer must have the same. For the number we calculated, that is the ones place.
The 1 in the tenths place (157.142857) tells us to leave the 7 in the ones place.
[tex]157 \ kPa= P_2[/tex]
If the gas expanded to a volume of 35.0 liters while the temperature remained constant, the pressure in container was approximately 157 kilopascals.
What is the molarity of 2.5 mol NaOH in a 1.0 L solution?
Answer:
0.0015 M
Explanation:
we know, M = n/V = 2.5/1000 = 0.0015 M
Which of the following pH numbers are acidic? (Choose 2)
9
11
7
5
3
the pH numbers that are acidic above is 3 and 5
answer questions 3 and 4 for a brainly!
Answer:
The correct answer is -
3. Butyne
4. Pentene
Explanation:
The names of such organic compounds are classified on the number of the carbon atoms and based on a number these prefixes are attached -
Meth - one carbon
Eth - two carbons
Prop - three carbons
But - four carbons
Pent - five carbons, and so on
The bonds can be identified by names of an organic compound by their suffixes -
- ane = single bond
- ene = double bond
-yne = triple bond
Thus, for question 3, carbon numbers are 4 and triple bond so Butyne, and similarly for question 4, 5 carbon atoms and double bond so Pentene.
What does an increase in temperature do to the reaction rate?
Answer:
An increase in temperature typically increases the rate of reaction because an increase in temperature will raise the average kinetic energy of the reactant molecules. Therefore, a greater proportion of molecules will have the minimum energy necessary for an effective collision.Increasing the temperature increases reaction rates because of the disproportionately large increase in the number of high energy collisions. It is only these collisions (possessing at least the activation energy for the reaction) which result in a reaction.
Explanation:
Can you please give this answer a brainliest answer please
8.
(a) Tick (™) the box next to the correct statement about the mixture.
mixture of four elements
mixture of four compounds
mixture of two elements and two compounds
mixture of one element and three compounds
Answer:
mixture of four compounds
mixture of two elements and two compounds
Explanation:
it can be one of thosecan u tell me if its correct pls I'm studying this tooIn hospitals, staff members wear shoes with special soles to prevent build up of static charge as they walk. Why?Single line text.
Answer:
The correct answer is - sudden static charge could damage sensitive medical equipment.
Explanation:
Staff members of a hospital or medical institution wear special shoes that are able to prevent static charge as they walk. These shoes help to prevent static charge as we know that the sudden transfer of a static charge to medical equipment may alter the reports or damage sensitive equipment. This type of static charge is negative or positive due to electronic devices touches the device leads to damage of electric devices.
Thus, the correct answer is - sudden static charge could damage sensitive medical equipment.
N2 + 3H2 → 2NH3 How many moles of hydrogen are needed to react with 5 moles of nitrogen?
Answer: 15 mol
Explanation:
From the equation, we know that for every mole of nitrogen consumed, 3 moles of hydrogen are consumed.
So, the answer is 5(3) = 15 mol
How many miles are in 27.4 g of NO2
Answer:
0.59 moles
Explanation:
Given mass = 27.4 g
Molar mass of NO₂ = 46 g/mol
We need to find the number of moles. We know that,
No of moles = given mass/molar mass
Put all the values,
[tex]n=\dfrac{27.4}{46}\\\\n=0.59[/tex]
Hence, there are 0.59 moles of NO₂ .
write the chemical formula of 25 compound
Ca(OH)2+CO2=___+____
Answer:
CaCO3 + H2O
Step by step explanation