Answer: The pressure of the He is 2.97 atm
Explanation:
According to Dalton's law, the total pressure is the sum of individual pressures.
[tex]p_{total}=p_{N_2}+p_{O_2}+p_{He}.[/tex]
Given : [tex]p_{total}[/tex] =total pressure of gases = 6.50 atm
[tex]p_{N_2}[/tex] = partial pressure of Nitrogen = 1.23 atm
[tex]p_{O_2}[/tex] = partial pressure of oxygen = 2.3 atm
[tex]p_{He}[/tex] = partial pressure of Helium = ?
putting in the values we get:
[tex]6.50atm=1.23atm+2.3atm+p_{He}[/tex]
[tex]p_{He}=2.97atm[/tex]
The pressure of the He is 2.97 atm
the correct formula for the diagram is
1. 2KO
2. K2O
3. K2O
4. KOK2
Answer:
The diagram provided shows K2O, or potassium oxide.
Explanation:
Ok... so, there are two "K2O" options, so I would just choose either and hope for the best. I don't know, maybe it's a mistake...
Answer:
The answer is K2O or dipotassium Monoxide
I NEED HELP PLZZ THX <3
Question 16
A hockey puck is hit with a large force. The puck moves at a high speed as it slides over the ice.
What happens according to Newton’s first law of motion?
A) The puck does not lose any speed because ice is a very slippery surface.
B) The puck gradually slows down because mass makes objects slow down.
C) The puck gradually slows down because friction would be acting on it.
D) The puck does not lose any speed because once an object starts moving, the force of friction would no longer apply to it.
Answer:
C) The puck gradually slows down because friction would be acting on it.
Explanation:
It would be C because the puck would be scraping the ice and when it's scraping it slowly losses its speed because the ground is pushing it lightly
Hoped that helped :/
how heart attacks and Strokes caused by cholesterol
With high cholesterol, you can develop fatty deposits in your blood vessels. Eventually, these deposits grow, making it difficult for enough blood to flow through your arteries. Sometimes, those deposits can break suddenly and form a clot that causes a heart attack or stroke.
Answer:
Cholesterol is a waxy substance found in your blood. Your body needs cholesterol to build healthy cells, but high levels of cholesterol can increase your risk of heart disease.
With high cholesterol, you can develop fatty deposits in your blood vessels. Eventually, these deposits grow, making it difficult for enough blood to flow through your arteries. Sometimes, those deposits can break suddenly and form a clot that causes a heart attack or stroke.
Explanation:
High cholesterol can cause a dangerous accumulation of cholesterol and other deposits on the walls of your arteries (atherosclerosis). These deposits (plaques) can reduce blood flow through your arteries, which can cause complications, such as:
Chest pain. If the arteries that supply your heart with blood (coronary arteries) are affected, you might have chest pain (angina) and other symptoms of coronary artery disease.
Heart attack. If plaques tear or rupture, a blood clot can form at the plaque-rupture site — blocking the flow of blood or breaking free and plugging an artery downstream. If blood flow to part of your heart stops, you'll have a heart attack.
Stroke. Similar to a heart attack, a stroke occurs when a blood clot blocks blood flow to part of your brain.
Solutions of potassium chloride and silver nitrate are mixed.
Answer:
A solution of potassium chloride when mixed with silver nitrate solution forms an insoluble white substance silver chloride.
Explanation:
:)
Helllllp meh pleaseeeeeee
Answer:
c (clay)
Explanation:
What causes an object to have a positive charge?
Which of the following factors would affect the rate at which the stages of death happen
A.Humidity
B.Temperature
C.If the person was sick
D.All of the choice would affect the rate
What is the chemical formula for propane?
C38H
3C8H
C3H8
3CH8
Answer:
C38H
Thank You! :)
This is 10th grade Chemistry
Answer:
shift to restore equilibrium
Explanation:
Le Châtelier's Principle states that when a stress is applied to a system at equilibrium, the system will respond by shifting in the direction (either towards the products or reactants side) that opposes/ minimizes the effect of the stress.
Note that although the system tries to restore equilibrium, this equilibrium is a new equilibrium.
Equilibrium is the state of a reversible reaction when:
• two opposing reactions occur at the same rate;
• the concentrations of reactants and products are constant
3) A child has a toy balloon with a volume of 1.8 liters. The temperature of the balloon when it was filled was 22° C and the pressure was 1.0 atm. If the child were to let go of the balloon and it rose into the sky where the pressure is 0.86 atm and the temperature is 8° C, what would the new volume of the balloon be?
This is a combined gas law problem, according to which
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]
where P is the pressure of the gas, V is the volume of the gas, and T is the temperature of the gas, and the subscripts 1 and 2 correspond to the initial and final conditions of the gas. In this problem, we are given the initial pressure, volume, and temperature of the gas in the balloon:
P₁ = 1.0 atm
V₁ = 1.8 L
T₁ = 295.15 K (K = °C + 273.15).
Moreover, we are given the final pressure and temperature of the gas in the balloon.
P₂ = 0.86 atm
T₂ = 281.15 K.
What we want to find is the final volume, V₂, which we can obtain by rearranging the combined gas equation to solve for V₂:
[tex]V_2=\frac{P_1V_1T_2}{T_1P_2} = \frac{(1.0 \text{ atm})(1.8 \text{ L})(281.15 \text{ K})}{(295.15 \text{ K})(0.86 \text{ atm})} \\ V_2 = 1.99 \text{ L}[/tex]
This answer has three significant figures. However, the question as written would warrant an answer that comprises one significant figure (as 8 °C has only one sig fig). In that case, the answer would be 2 L. If the answer is to be given to two significant figures, the volume would then be 2.0 L.
what does 3 hour change mean?
Answer:
like what happens In 3 hours
What are the similarities between a phylogenetic trees and cladograms.
Answer: A phylogenetic tree is an evolutionary tree that shows the evolutionary relationships between different groups of animals, Cladograms give a hypothetical picture of the actual evolutionary history of the organisms
Explanation: Hope this helps you out :)
Which describes the molecule below?
O A. A lipid with three saturated fatty acids
• B. A lipid with two unsaturated fatty acids and one saturated fatty
acid
• C. A lipid with three unsaturated fatty acids
• D. A lipid with two saturated fatty acids and one unsaturated fatty
acid
Calculate the number of moles of NaOH contained in 250. mL of a 0.05M solution.
Answer:
https://newshamchem.weebly.com/uploads/2/2/0/3/22035226/molarity_&_worksheet_answer.pdf
question 9.
Explanation:
Answer:
.0125 moles
Explanation:
Molarity = moles/volume
.05 M = moles/.250L
.0125 = moles
need help balancing these
Answer:
The answers are 1:3:13
Explanation:
when I had to do these types of equations just search them up on you-tube lol theres this guy called Wayne Breslyn that does a really good job of explaining and has like the answers for any and everyy balancing equation
Plants and animals require large amounts of water in order to survive. Although vast numbers of plants and animals have lived throughout time, the amount of water in our environment has remained relatively constant. Which of the following statements explains why this occurs?
A. Water continually flows from the center of Earth.
B. Vast quantities of water are created by lightning in clouds.
C. Organisms return water to the environment after they use it.
D. Organisms combine hydrogen and oxygen to make their own water.
please help me
Answer: C - Organisms return water to the environment after they use it.
Explanation: The amount of water on earth will always remain the same. Water goes in and out of all organisms. It is not possible to be more or less.
Answer the multiple choice question below
Which physical property allows liquid-liquid mixtures to be separated using filtration?
I
A. Melting point
В.
Density
C.
Flammability
Evaporation
Answer:
flammability evaporation
How many grams are in 3.00 moles of carbon
Answer: Ok I think The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Carbon, or 12.0107 grams. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between moles Carbon and gram. 12 grams
This means that the atomic mass or atomic weight (12 grams) of carbon is equal to exactly 1 mole of carbon.
hope this helps have a awesome night/day❤️✨
Explanation:
There are 36 grams in 3.00 moles of carbon.
HOW TO CALCULATE MASS:
The mass of a substance can be calculated by multiplying the number of moles by its molar mass. That is;mass (g) = no. of moles (mol) × molar mass (g/mol)According to this question, 3 moles of carbon was given. The mass can be calculated as follows:atomic mass of Carbon = 12g/molMass = 12g/mol × 3molMass = 36g. Therefore, there are 36 grams in 3.00 moles of carbon.Learn more at: https://brainly.com/question/15743584?referrer=searchResults
which substance will evaporate first???????????????????
Answer:
I think it would be a liquid.
Explanation:
If the temperature hits a certain point, it will turn to ice. If the ice gets exposed to heat, it will melt and return back to it's natural form, a lqiuid. If the liquid is exposed to enough heat, it will evaporate. Not sure if this is right, but I tried my best!
PLEASE HELP ME QUICKLY!
Imagine you are at your favorite beach. The sun is shining and you are enjoying the ocean breeze. The temperature is about 89F. You take your shoes off and realize that the sand is almost too hot to walk on. You run to the water's edge to wet your feet after the walk over the sand and realize that the water is almost too cold. Explain the temperature difference between the sand and water using Thermodynamics.
Answer:
The specific heat of water is more specific than the heat of sand, therefore, it will take more energy to raise the same amount of water with the same temperature.
Explanation:
The temp is 89 F so, 31.67° C
The specific heat of the water is 4.184 J/g° C
The specific heat of the sand is 0.290 J/ g° C
The heat is the amount of energy that is needed to raise the temp. of the substance
You will need a lot more energy to raise the temp of the water then of the same amount of sand, therefore, because of the specific lower heat of the sand it will raise it's temperature quicker compared to water.
Which of the following is an
example of thermal energy?
A. turning on a lamp so you can read
B. rubbing your hands together to get warm
C. kicking a ball
Answer:
B. rubbing your hands together to get warm,
Explanation:
Rubbing your hands together warms them by converting work into thermal energy.
Hope it helps ;)
Answer:
I think its A
Explanation:
Because a lamp has a lightbulb and it produces wasted heat and is thermal energy
Name the following cycloalkane:
CH2CH2CH2CH3
A. butylcyclohexane
B. butylcyclopentane
C. propylcyclohexane
Answer:
The answer for this question is A. butylcyclohexane
Explanation:
Choose letter A
You welcome have a nice day.
Name of the given compound is butyl cyclohexane.
What are cyclo alkanes?Cyclo alkanes are those organic compounds in which alkanes are present in the cyclic form.
In the nomenclature of cyclo alkane, name of the substitute is put before the name of the main ring. In the given structure number of carbons in ring is 6 so that given cycloalkane is cyclohexane and butyl group is attached as substitute. So name of the given compound is butyl cyclohexane.
Butyl cyclopentane is wrong because 6 carbons are present in ring.Propylcyclohexane is also wrong because 4 carbons are attached in the ring.Hence name of the compound is butyl cyclohexane.
To know more about cycloalkanes, visit the below link:
https://brainly.com/question/25058711
#SPJ2
Covalent bonds form due to the attraction between _____.
a positive atomic nucleus and a negative one
the nuclei of two atoms
the electrons of two atoms
the electrons of one atom and the nucleus of another
Answer:
the electron of one atom and the nucleus of another
how many grams of iorn reacts with 71 grams of chlorine to produce 117 grams of sodium chloride
Answer:
The answer to your question is: 71 g of Chlorine
Explanation:
Na = 46 g
Cl = ?
NaCl = 117 g
Equation
2 Na + Cl₂ ⇒ 2 NaCl
46g X 117g
If we consider the law of conservation of matter, we know that the mass of the reactants equals the mass of the products, then
mass Na + mass Cl₂ = mass NaCl
46 g + X = 117
X = 117 - 46
x = 71 g of Chlorine
Silver is a metal; it reacts with oxygen which is a non-metal to form Silver Oxide. The bond between Silver and Oxygen is called
(Related to Science)
2.50 L of gas originally at 50 K is warmed to 80 K. If the pressure remains constant, which gas law needs to be used to find the new volume?
Select one:
a.Charles law
b.Gay-Lussac’s law
c.Boyle’s law
d.Combined gas law
The cells of all organisms must produce energy in order for the cell to survive and function. The diagrams below show
different parts of an animal cell and a plant cell.
In which organelle is energy produced in both plant and animal cells?
O Ribosomes
Nucleus
Chloroplast
O Mitochondria
Answer:
Mitochondria Is produced by both animal and plant cells
Explanation:
how much energy is used to raise the temperature of 3kg of aluminium from 18°C to 23°C? Use the table below and this equation: Q=mc T
A. 13,455 J
B. 2691 J
C. 13.455
D. 4.485 J
How much energy is required to raise the temperature of 3 kg of aluminum from 18°C to 23°C? Use the table below and this equation: Q=mcΔT
in which group in the periodic table do we not find metal A.Group 1 B.Group 2 C.Group 3 D.Group 5
Answer:
Group 5
Explanation:
Using method of elimination:
A. Group 1
Also known as the Alkali metals group. It contains metals such as lithium and sodium. This option is incorrect.
B. Group 2
Also known as the Alkali Earth metals group. It contains metals such as Magnesium and calcium. This option is incorrect.
C. Group 3
It contains metals such as Aluminium and scandium. This option is incorrect.
D. Group 5
This is the correct option. The elements in these group are non metals. Examples include Nitrogen.
What type of energy transfer happens when you turn on a light bulb?
Answer:In the case of an electric bulb, the electrical energy is converted to light and heat. The amount of electrical energy put into a bulb = the amount of light energy (desirable form) plus the heat energy that comes out of the bulb
Explanation:
Just trust me
Answer:
A type of energy
Explanation: