Answer:
Veins
Explanation:
Veins, which usually look blue, return blood to the heart.
Use the activity series below to predict whether the following reactions will take place.
Answer: I HAVE ATTACHED PROOF SO DONT REMOVE MY ANSWER, MODS.
1. NO
2. NO
Answer: 1. NO 2. NO
Explanation: Just did it and got it correct.
An aerosol can contains 400.0 ml of compressed gas at 5.2 atm pressure. When the gas is sprayed into a large plastic bag, the bag inflates to a a volume of 2.14 L. What is the pressure of gas inside the plastic bag?
Answer:
0.97 atm ≅ 1 atm
Explanation:
The relation between the pressure (P) and volume (V) of a gas is given by the Boyle's law. According to this, the volume is inversely proportional to the pressure:
P₁ x V₁ = P₂ x V₂
From the problem, we have:
V₁= 400.0 mL x 1 L/1000 mL = 0.4 L
P₁= 5.2 atm
V₂= 2.14 L
We calculate the final pressure (P₂) from the equation, as follows:
P₂ = (P₁ x V₁)/V₂ = (5.2 atm x 0.40 L)/ 2.14 L = 0.97 atm ≅ 1 atm
Therefore, as the volume is increased (from 0.4 L to 2.14 L), the pressure in decreased (from 5.2 atm to 0.97 atm).
A 400.0-mL can contains compressed gas at 5.2 atm. The gas is sprayed into a bag, that inflates to 2.14 L at 0.97 atm.
What does Boyle's law state?Boyle's law states that the pressure of a given mass of an ideal gas is inversely proportional to its volume at a constant temperature.
A 400.0-mL can contains compressed gas at 5.2 atm. The gas is sprayed into a bag, that inflates to 2.14 L. We can calculate the final pressure of the gas using Boyle's law.
P₁ × V₁ = P₂ × V₂
P₂ = P₁ × V₁ / V₂
P₂ = 5.2 atm × 0.4000 L / 2.14 L = 0.97 atm
where,
P₁ and V₁ are the initial pressure and volume.P₂ and V₂ are the final pressure and volume.A 400.0-mL can contains compressed gas at 5.2 atm. The gas is sprayed into a bag, that inflates to 2.14 L at 0.97 atm.
Learn more about Boyle's law here: https://brainly.com/question/469270
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will give brainliest
Answer:
Kinetic energy.
Explanation:
what is the # of Electrons in carbon?
Answer:
Carbon dioxide (CO2)
Ethene (C2H4)
Methane (CH4)
Explanation:
Draw a line to connect the following terms to their definitions PLZ HURRY
A - 3
B - 4
C - 1
D - 5
E - 2
(hope this helps ^^)
Answer:
Ya I kinda just new, answers I feel Mede it easier to.
name two solid liquid and gaseous element at the normal temperature and normal press
ure
Answer:
Solid: calcium and potassium
Liquid: mercury and bromine
Gaseous: oxygen and fluorine
Explanation:
Matter exists in three different states namely: solid, gaseous and liquid. Elements that are found in nature are classified as matter. Since, these elements are grouped as matter, they can either be found as either solids, liquids or gases at normal temperature and pressure.
At normal temperature (20°C or 293K) and pressure (1 atm), the following elements are found to exists in the respective state of matter:
Solid: Calcium (Ca) and potassium (K)
Liquid: Mercury (Hg) and bromine (Br)
Gaseous: Oxygen (O) and fluorine (F)
bacon head chicken noob
Answer:
alright that sounds like a recipe i gota try
Answer:
cool!!!
Explanation:
If you have 2 of the same substance and they are at the same temperature but have a different amount, what changes?
Answer:
The heat energy stored within them changes
Explanation:
Heat energy is a function of the mass of a body, its specific heat capacity, and its temperature.
In this case, the bodies have the same specific heat capacity since they are made from the same material and the same temperature.
To get the quantity of heat stored in a body, we need to multiply all three parameters as shown below
[tex]Q = mC \Delta T[/tex]
An increase in mass, through an increase in the amount of substance of a material present, will cause a corresponding increase in the heat energy stored within the material
If the sun heated our atmosphere and the molecules began to s;read apart and rise but the atmosphere was to weak to keep them down , what would happen?
What is the molar mass of NaOCI?
Answer:
the molar mass of NaOCl is 74.5g
PLS HELP ASAP I DONT KNOW WHAT TO WRITE AND I ONLY HAVE 6 MINUTES HELPP
Answer:
In all of the ecoregions, wind and rain can weather and erode the landforms and soil. Rivers are also
powerful weathering and erosion agents. They can cut into rock and form canyons. When rivers deposit
eroded material, they change their shape or extend the shoreline. When waves along coastlines deposit
sediment, they extend beaches; when they wash sediment away, the waves erode beaches. Rivers, rock
formations, soils, topography, and precipitation in an ecoregion will determine how the processes of
weathering, erosion, and deposition work to reshape it.
Explanation:
Can someone please help me with these questions
Answer:
1. 40 grams
2. 20 grams
Explanation:
every 10 years, divide by 2
year 0; 80
year 10; 40
year 0; 80
year 10; 40
year 20; 20
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I HAVE 5 minutes HELP!!
Which organelle accurately completes the chart?
O lysosome
O cell wall
O vacuole
O endoplasmic reticulum
Answer:
endoplasmic reticulum
Explanation:
Endoplasmic reticulum will complete the chart. The Endoplasmic reticulum is one type of organelle that is present in eukaryotic cells. They form a network that is interconnected with membrane-enclosed sacs or structures that are tube shaped and are called cisternae.
The belief that you lose fat mass in a specific body part by concentrating exercise in that area is known as:
Answer:
Targeted fat loss
Explanation:
Answer:
Spot reduction
Explanation:
<3
Please help im tryna finish school
Answer:
A. Wave Height
Explanation:
disadvantages of Mendeleev's periodic table
Answer:
Various limitations of Mendeleev's periodic table are:-
Position of hydrogen - he couldn't assign a correct position to hydrogen as it showed properties of both alkali and halogens .
Position of isotopes - he considered that the properties of elements are a function of their atomic masses. Hence isotopes of a same element couldn't be placed.
In the d-block , elements with lower atomic number were placed before higher atomic number.
Explanation:
What is specific heat a measure of?
O A. How much energy it takes to break chemical bonds
B. How much energy it takes to heat a substance
C. How much energy it takes to vaporize a substance
D. How much energy it takes to melt a substance
Answer:
B. How much energy it takes to heat a substance
Explanation:
Specific heat capacity:
It is the amount of heat required to raise the temperature of one gram of substance by one degree.
Formula:
Q = m.c. ΔT
Q = amount of heat absorbed or released
m = mass of given substance
c = specific heat capacity of substance
ΔT = change in temperature
The substances with higher value of specific heat capacity require more heat to raise the temperature by one degree as compared the substances having low value of specific heat capacity. For example,
The specific heat capacity of oil is 1.57 j/g. K and for water is 4.18 j/g.K. So, water take a time to increase its temperature by one degree by absorbing more heat while oil will heat up faster by absorbing less amount of heat.
Consider that both oil and water have same mass of 5g and change in temperature is 15 K. Thus amount of heat thy absorbed to raise the temperature is,
For oil:
Q = m.c. ΔT
Q = 5 g× 1.67 j/g K × 15 K
Q = 125.25 j
For water:
Q = m.c. ΔT
Q = 5 g× 4.18 j/g K × 15 K
Q = 313.5 j
we can observe that water require more heat which is 313.5 j to increase its temperature.
For questions 14-16 pick out the variables that will be needed to answer the following question: Do trees grow faster if it is wetter in the summer?
14) What is the independent variable?
a.) amount of rain
b.) no rainfall
c.) amount of growth
15) What is the dependent variable?
a.) amount of rain
b.) no rainfall
c.) amount of growth
16) What is the control?
a.) amount of rain
b.) no rainfall
c.) amount of growth
Answer:
14) A. amount of rain
15) C. amount of growth
16) B. no rainfall
Explanation:
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How many joules are needed to change the temperature of 40 g of water from 33 C to 23 C?
Answer:
Explanation:
Given parameters:
Mass of water = 40g
Initial temperature = 33°C
Final temperature = 23°C
Specific heat capacity of water = 4.2J/g°C
Unknown:
Quantity of heat = ?
Solution:
To solve this problem, we use the expression below;
H = m c Δt
H is the quantity of heat
m is the mass
c is the specific heat capacity
Δt is the change in temperature
H = 40 x 4.2 x (23 - 33) = -1680J
The water will have to lose 1680J of heat to bring it to that final temperature.
i need help on this science question
Answer:
C
Explanation:
The kinetic energy of a body is the energy due to the motion of a body. It is mathematically given as;
Kinetic energy = [tex]\frac{1}{2}[/tex] m v²
m is the mass of the body
v is the velocity
Now, let us find the K.E from the given choices;
Option C will have the greatest kinetic energy;
mass = 0.14kg , v = 40m/s
Kinetic energy = [tex]\frac{1}{2}[/tex] x 0.14 x 40² = 112J
A 14.1g sample of NaOH is dissolved in 200.0g of water in a coffee-cup colorimeter. The temperature increases from 20.0C to —-. Specific heat of liquid water is 4.18 J/g-K and deltaH for the dissolution of sodium hydroxide in water is 44.4kj/mol.
Answer:
The temperature finally increased from 20 °C to 38.7 °C
Explanation:
This a problem about calorimetry. Formula to solve it is:
Q = m . C . ΔT
Where ΔT is Final T° - Initial T°
m is the mass
and C, specific heat.
In this situation we are dissolving NaOH where 1 mol requires 44.4 kJ of heat. As we do not have 1 mol, we need to determine the heat that is released.
We convert the mass to moles
14.1 g . 1 mol / 40g = 0.3525 mol
We determine the heat
0.3525 mol . 44400 J/mol = 15651 Joules of heat.
Now we can replace data in the calorimetry formula:
15651 J = 200 g . 4.18 J/g°C (Final T° - 20°C)
15651 J / (200 g . 4.18 J/g°C) = Final T° - 20°C
18.7°C + 20°C = Final T° → 38.7°C
A chemist was working on a new treatment for nonliving infectious agents that are not curable. What type of infectious agent is the new medicine for?
A. Virus
B.Fungus
C.Parasite
D.Bacteria
Answer: D: bacteria
Explanation:
Why is Newton's first law of motion important to science?
Answer:
Newton's laws are very important because they tie into almost everything we see in everyday life. These laws tell us exactly how things move or sit still, like why you don't float out of bed or fall through the floor of your house.
Explanation: Newton's laws of motion are important because they are the foundation of classical mechanics, one of the main branches of physics. Mechanics is the study of how objects move or do not move when forces act upon them.
Plz i wanna those answers click on the photo to see all the question they are 2 queastions part A and B
Answer:
a.
Turn paper Blue - these are alkaline/ base substances.
ToothpasteSoapBleachTurn paper Red - these substances are acidic in nature.
Lemon JuiceVinegarCola drinkb. i. A wasp sting - Lemon juice
ii. A bee sting - Toothpaste
iii. A wasp sting is alkaline which means that running an acidic substance like lemon or lemon juice on it should neutralize it.
A bee sting is acidic so an alkaline substance such as toothpaste should neutralize it as well.
How did we find out the nitroglycerin would also help people with weak hearts?
Answer:
The physician William Murrell was one of the first physicians to recognize the the clinical benefits of nitroglycerin in the treatment of the heart disease known as angina pectoris, a type of chest pain caused by reduced blood flow to the heart.
Explanation:
The physician William Murrell was one of the first physicians to recognize the the clinical benefits of nitroglycerin in the treatment of the heart disease known as angina pectoris, a type of chest pain caused by reduced blood flow to the heart. He also used nitroglycerin to treat and reduce high blood pressure. He used small diluted doses of nitroglycerin to treat patients with angina pectoris. Murrell published his treatment results in the article "Nitro-glycerine as a remedy for angina pectoris," in the journal The Lancet in 1879. Thereafter, the use of nitroglycerin as treatment procedure for angina pectoris soon became generally adopted by other physicians.
Nitroglycerin is a vasodilator which is a medicine that opens blood vessels in order to improve blood flow. Nitroglycerine acts to improve blood flow to the heart by opening up or dilating the coronary arteries in the heart, thereby reducing how hard the heart has to work in pumping blood round the body. It reduces preload by dilating veins and reduces afterload moderately by dilating arteries.
Nitroglycerin comes in two forms: quick-acting forms and long-acting forms.
The quick-acting forms include tablets or oral sprays.
Long-acting forms include pills, tablets, skin ointment, and skin patches.
When a machine does work, a trade-off occurs. Which of the following best exemplifies this trade-off?
A. A pulley changes the direction of your force, but requires a greater input force.
B. A lever increases output force and the distance the load moves.
C. A wheel and axle increases output force and the distance the load moves.
D. A ramp allows you to decrease force, but requires a greater distance.
Answer:
A
A pulley changes the direction of your force, but requires a greater input force.
Explanation:
A pulley changes the direction of your force, but requires a greater input force when machine does work. so option A is correct.
What is machine ?Any tool that makes work easier is a machine. We can complete tasks with the aid of machines by using less force and energy.
By using a simple machine, you can move anything with less effort, but you have to move it farther to do the same amount of labor.
Our bodies function like machinery. For instance, our arms can be compared to a machine that can be utilized to quickly lift objects.
By using a machine to perform work, either the force or the distance across which the force is delivered may rise, but not both at once. In other words, as one grows, either force or distance, the other must decrease. The force-distance trade off is what is meant by this.
Thus, option A is correct.
To learn more about machine follow the link below;
https://brainly.com/question/3135614
#SPJ6
All energy originates from the _______.
A. biomass
B. mitochondria
C. sun
D. chloroplast
Answer:
sun
Explanation:
because all plants use energy from the sun to make food and grow
1. How much heat is required to melt 25.0 g of ice at 0°C?
Answer: The heat required to melt 25.0 g of ice at [tex]0^0C[/tex] is 8350 Joules
Explanation:
Heat of Fusion tells us how much energy is needed to convert 1g of a solid to a liquid at the same temperature.
[tex]Q=m\times L[/tex]
Q = Heat absorbed = ?
m = mass of ice = 25.0 g
L = Latent heat of fusion of ice = 334 J/g
Putting in the values, we get:
[tex]Q=25.0g\times 334J/g=8350J[/tex]
Thus heat required to melt 25.0 g of ice at [tex]0^0C[/tex] is 8350 Joules
How might a collision between Neptune and Halley's Comet
affect Neptune's orbit?
Answer:
It will mess up the orbit around the sun
Explanation:
The impact of Halley's Comet with Neptune may force the asteroid to descend into Neptune's orbit, which may divert somewhat from its original path.
The collision of two heavenly bodies results in a powerful impact.
This collision might prevent Halley's Comet from continuing on its path and eventually colliding with Neptune.
Learn more:
https://brainly.com/question/11453551?referrer=searchResults
Can someone answer this for me?
Answer: The moles of nitrogen dioxide produced are 96.3
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
To calculate the moles, we use the equation:
[tex]\text{Number of moles}=\frac{\text{Given volume}}{\text {Molar volume}}=\frac{3714L}{22.4L}=165.8moles[/tex]
[tex]4NH_3(g)+7O_2(g)\rightarrow 4NO_2(g)+6H_2O(g)[/tex]
According to stoichiometry:
7 moles of oxygen [tex](O_2)[/tex] produce = 4 moles of nitrogen dioxide [tex](NO_2)[/tex]
Thus 168.5 moles of oxygen [tex](O_2)[/tex] will produce = [tex]\frac{4}{7}\times 168.5=96.3[/tex] moles of nitrogen dioxide [tex](NO_2)[/tex]
