Answer: 7.00 L
Explanation:
Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.
[tex]P\propto \frac{1}{V}[/tex] (At constant temperature and number of moles)
[tex]P_1V_1=P_2V_2[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 42.0 mm Hg
[tex]P_2[/tex] = final pressure of gas = 75.0 mm Hg
[tex]V_1[/tex] = initial volume of gas = 12.5 L
[tex]V_2[/tex] = final volume of gas = ?
[tex]42.0\times 12.5=75.0\times V_2[/tex]
[tex]V_2=7.00L[/tex]
Therefore, the volume when the pressure has increased to 75.0 mm Hg is 7.00 L
A model of the helium atom is shown below. Select all of the neutrons in the picture.
Given is a helium atom. Inside the nucleus , there are 2 protons denoted by blue colour and the other two are neutrons denoted by green colour
Chemical element helium has the atomic number 2 and the symbol He. It is the first member of the noble gas group in the periodic table and is a colorless, odorless, tasteless, non-toxic, inert, monatomic gas.Neutrons have no charge, protons have a positive charge, and electrons have a negative charge.One proton's positive charge and one electron's negative charge are equal.While electrons have essentially negligible mass, protons and neutrons each have a mass of 1.While electrons quickly revolve around the nucleus in fixed circular orbits, protons and neutrons are present collectively in the nucleus at its center.The nucleus, located in the heart of the atom, is home to protons and neutrons, which are heavier than electrons.Learn more about helium here:
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What type of boundary exists along the coast of California?
Answer:
I exist ;-;
Explanation:
can someone help me??
Which action is a result of gravity in relation to moving tectonic plates?
Earth's internal heating
circulating material in the mantle
ridge push and slab pull
Earth's magnetic field reverses
Answer:
I do K12 and c is correct!
Answer: B. ridge push and slab pull
Explanation: Took the test.
Which of the following best describes the velocity of an object?
A B0 m/s
B 30 m east
C 30 m/s east
D 30 m/s2
Answer:
[tex]\boxed {\boxed {\sf C. \ 30 \ m/s \ east}}[/tex]
Explanation:
Velocity is the vector measurement of the change in position over time. A vector measurement means the answer must include a magnitude (numerical value) and a direction.
Here are some units of velocity:
m/s (meters per second) kph (kilometers per hour) km/s (kilometers per second)There are many other units, but m/s is the most common.
We can eliminate choice B and D, because the units (meters-m and meters per second squared-m/s²) are not for velocity.
We are left with choice A (30 m/s) and C (30 m/s east). Remember, velocity needs a number and a direction. C contains the direction east, so it must be the correct answer.
The partial symbol for a particular ion is 26M2+ What are the number of electrons contained in one ion
Answer:
24
Explanation:
26-2=24 because when an atoms loses 2 electrons it gains 2+ charge
A 1.25 g sample of aluminum is reacted with 3.28 g of copper (II) sulfate. What is the limiting reactant?
2Al(s) + 3CuSO4(aq) = Al2(SO4)3(aq) + 3Cu(s)
Select one:
a. Copper
b. Aluminum sulfate
c. Aluminum
d. Copper (II) sulfate
Answer:
d. Copper (II) sulfate
Explanation:
Given data:
Mass of Al = 1.25 g
Mass of CuSO₄ = 3.28 g
What is limiting reactant = ?
Solution:
Chemical equation:
2Al + 3CuSO₄ → Al₂ (SO₄)₃ + 3Cu
Number of moles of Al:
Number of moles = mass/molar mass
Number of moles = 1.25 g/ 27 g/mol
Number of moles = 0.05 mol
Number of moles of CuSO₄:
Number of moles = mass/molar mass
Number of moles = 3.28 g/ 159.6 g/mol
Number of moles = 0.02 mol
now we will compare the moles of reactant with product.
Al : Al₂ (SO₄)₃
2 : 1
0.05 : 1/2×0.05=0.025 mol
Al : Cu
2 : 3
0.05 : 3/2×0.05 = 0.075 mol
CuSO₄ : Al₂ (SO₄)₃
3 : 1
0.02 : 1/3×0.02=0.007 mol
CuSO₄ : Cu
3 : 3
0.02 : 0.02
Less number of moles of reactants are produced by CuSO₄ thus it will act as limiting reactant.
What is the relationship between the number of digits and the evolution of the tetrapod?
Answer:As the tetrapod evolved, the number of digits decreased
Explanation:
Answer: During the evolution of the tetrapod limb, the number and pattern of elements along the proximal–distal axis (running from the shoulder to the fingers) has remained invariant, while the number and pattern of elements along the autopod anterior–posterior axis (thumb to little finger, also designated digi
Explanation:
An atom of hydrogen loses its electron. What is its charge
Answer:
When an atom of hydrogen loses its electron it becomes positively charged.
Hope it will help you........Final Answer: +1
Explanation/Reasoning:
Because hydrogen is an atom (not an ion), you'll write it as H (not H+). Hydrogen (H) has one proton and one electron, so if it loses its electron, it will only have one proton. Therefore, it becomes an ion of H+. This means that the charge will be +1.
~I hope I helped you :)~
When two continental plates of similar
densities collide,
A. they remain level since densities in both plates are equal.
B. they both push back down into the mantle
C. one plate rides over the other one and forms a trench
D.they buckle upward and form mountains
Answer:
D. They buckle upward and form mountains.
Explanation:
When two plates (either oceanic or terrestrial) converge and they are of similar density then they will crash into each other and form mountains. A great example of this is when India crashed into the Asian continent and the Himalayas were formed.
Do the earth plates ride on the crust or mantle?
Answer:
Mantle
Explanation:
The crust is also known as earths tectonic plates
what hypothesis is best for chemical reaction?
will give Brainliest
Answer:
If the reactants in the chemical reactions are known, then the products can be predicted because the pattern of the chemical reactions is being followed. The pattern for a single replacement is A + BC --> AC + B. This is like the Hear It Pop Chemical Reaction which is also an example of the single replacement.
Explanation:
A scientist observes plant roots growing through the mountain side. This is evidence for which type of natural process?
Physical weathering
Chemical Weathering
Erosion
Deposition
Answer:
I think chemical Weathering
Answer:
Deposition is the answer
Explanation:
Please help me !!!!!
manganese atom has 30 neutrons and atomic number 25
determine the electron cloud charge of manganese
Answer:
the most common oxidation no.of manganese is +2 +3 +4 +6 +7
What is the similarity between teeth and eggshells?
*. Please answer
Answer: Eggshells have a similar chemical composition to our tooth enamel, making them react similarly with other chemicals. This can help us understand what stains tooth enamel. When we brush an eggshell with fluoridated toothpaste, it strengthens the shell and protects it from acid, just like it does for our tooth enamel
Explanation:
Answer: Eggshells have a similar chemical composition to our tooth enamel, making them react similarly with other chemicals. This can help us understand what stains tooth enamel. When we brush an eggshell with fluoridated toothpaste, it strengthens the shell and protects it from acid, just like it does for our tooth enamel.
soap making ingredients list (not harmful chemicals)
20 oz. coconut oil
10 oz. olive oil
9 oz. distilled water
essential oils
colorants (optional)
dried herbs or flowers (optional)
soap base accordingly
Do electrons have psrticle nature or wave nature?
Explanation:
they have wave nature
its correct answer
A block is pulled 0.90 m to the right in 3.75 s.
What is the block’s average speed to the nearest hundredth of a m/s?
Answer:
0.36 m/s
Explanation:
im in 8th grade in honors science and i think, since u have distance and time you have to divide distance by time
The table shows data for two groups of plants one grown with fertilizer and the other without fetalizer was the mean height of the plant given fertilizer
Answer:
What is the question?
Explanation:
GIVING BRAINLIEST!
Please define the following in your own words:
law of conservation of matter
Answer:
Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another.
Explanation:
brainliest?
Answer: Hope this helps:)
The Law of Conservation of Mass dates from Antoine Lavoisier's 1789 discovery that mass is neither created nor destroyed in chemical reactions. In other words, the mass of any one element at the beginning of a reaction will equal the mass of that element at the end of the reaction. The law of conservation of matter states that in any given system that is closed to the transfer of matter, the amount of matter in the system stays constant. The law of conservation of matter says that in chemical reactions, the total mass of the products must equal the total mass of the reactants. French chemist A. Lavoisier laid the foundation to the scientific investigation of matter by describing that substances react by following certain laws. These laws are called the laws of chemical combination. Matter says that the amount of matter stays the same, even when matter changes form. Sometimes it may seem that matter disappears during a science experiment, but this law tells us that matter cannot magically appear or disappear, it simply changes from one form to another. Matter can change form through physical and chemical changes, but through any of these changes, the matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.
___SeCl6+ ____ O2——> ___ seO2 +___Cl2
If you can do this I need help with more
Answer:
SeCl6 + O2——> seO2 + 3Cl2
Whic statements explain why rocks weather at different rates? Check all that apply
Explanation:
Weathering occurs one of three ways: through physical processes such as freezing and thawing, because of live organisms whose roots break rocks or through chemical processes that occur when carbon dioxide in the soil and air and mixes with water and specific minerals in rocks to form a weak acid that reduces rocks into silt, soil and sediment.
Chemical weathering typically increases as temperatures rise and rain falls, which means rocks in hot and wet climates experience faster rates of chemical weathering than do rocks in cold, dry climates.
Read all above and you may just find your answer!Agl + Na25 yields Ag2S + Nal
Explanation:
Agl+hih+356bnh$&56DG hug zero cg hydh hod sir un bucks
A student spends 4.5 hours studying for a test. How much time is this equivalent to in seconds?
Select one:
a. 2,700 seconds
b. 16,200 seconds
c. 270 seconds
d. 6,480 seconds
Answer:
B. 16,200
Explanation:
1) Reduce.
4.5 hours can be translated to minutes. We know there are 60 minutes in an hour.
4.5 * 60 = 270 minutes
2) Reduce further
270 minutes can then be translated to seconds using the same equation
270 * 60 = 16,200
PLEASE ANSWER CORRECTLY !!!!!!!!!!!!!! WILL MARK BRAINLIEST !!!!!!!!!!!!!!
Answer:
the ice has reached its melting point
the water has reached its freezing point
the whatever that is has reached its cooling point I guess
Answer:A chemical reaction?
Explanation:let me be
PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP
DETERMINE THE MASS NUMBER OF EACH OF THE ISOTOPES OF LITHIUM
Answer:
not sure about it .I also need an answer
What is the primary organ of the nervous system
Answer:
The nervous system consists of the brain, spinal cord, sensory organs, and all of the nerves that connect these organs with the rest of the body. Together, these organs are responsible for the control of the body and communication among its parts.
Brain, spinal cord, retina, sensory neurons, ganglia, as well as nerves are the primary organ of the nervous system.
What is nervous system?Nervous system: a network of organized cells with the specific purpose of carrying electrochemical inputs from sensory receptors to the location where a reaction takes place.
Every living thing has the capacity to recognize changes in both its own surroundings and outside it. Changes in the inner environment include those in the posture of the head and limbs as well as those in the internal organs, whereas changes in the exterior environment include those in light, temperature, sound, motion, as well as odor. The nervous system's organs include the brain, spinal cord, retina, sensory neurons, ganglia, as well as nerves.
Therefore, brain, spinal cord, retina, sensory neurons, ganglia, as well as nerves are the primary organ of the nervous system.
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d. what happens when an iron nail is kept in copper sulphate solution?
Answer:
it changes color from blue to light green.
Explanation:
due to copper iron nail functions
Answer:
give the other person brainlieset plz
Explanation:
Can someone help me please!
Answer:
It tells you on the chart I've attached. It's all color coded. :p
A layer of sandstone is found on top of a layer of shale
Answer: Yes it is
Explanation: