Answer:
A force meter
i need help with this guys
Name the 3 steps involved in the treatment of polluted water? class 7
Explanation:
The processes involved in removing the contaminants include physical processes such as settling and filtration, chemical processes such as disinfection and coagulation, and biological processes such as slow sand filtration
1. The pressure of a gas is 100.0 kPa and its volume is 500.0 ml. If the volume increases to 1,000.0 ml, what is the new pressure of the gas?
2. If a gas at 25.0 °C occupies 3.60 liters at a pressure of 10 kPa, what will be its volume at a pressure of 25 kPa?
3. When the pressure on a gas increases three times, by how much will the volume increase or decrease?
4. Boyle's Law deals what quantities?
Answer:
1) The new pressure of the gas is 500 kilopascals.
2) The final volume is 1.44 liters.
3) Volume will decrease by approximately 67 %.
4) The Boyle's Laws deals with pressures and volumes.
Explanation:
1) From the Equation of State for Ideal Gases we construct the following relationship:
[tex]\frac{P_{2}}{P_{1}} = \frac{V_{1}}{V_{2}}[/tex] (1)
Where:
[tex]P_{1}, P_{2}[/tex] - Initial and final pressure, measured in kPa.
[tex]V_{1}, V_{2}[/tex] - Initial and final pressure, measured in mililiters.
If we know that [tex]P_{1} = 100\,kPa[/tex], [tex]V_{1} = 500\,mL[/tex] and [tex]V_{2} = 1000\,mL[/tex], then the new pressure of the gas is:
[tex]P_{2} = P_{1}\cdot \left(\frac{V_{1}}{V_{2}} \right)[/tex]
[tex]P_{2} = 500\,kPa[/tex]
The new pressure of the gas is 500 kilopascals.
2) Let suppose that gas experiments an isothermal process. From the Equation of State for Ideal Gases we construct the following relationship:
[tex]\frac{P_{2}}{P_{1}} = \frac{V_{1}}{V_{2}}[/tex] (1)
Where:
[tex]P_{1}, P_{2}[/tex] - Initial and final pressure, measured in kPa.
[tex]V_{1}, V_{2}[/tex] - Initial and final pressure, measured in mililiters.
If we know that [tex]V_{1} = 3.60\,L[/tex], [tex]P_{1} = 10\,kPa[/tex] and [tex]P_{2} = 25\,kPa[/tex] then the new volume of the gas is:
[tex]V_{2} = V_{1}\cdot \left(\frac{P_{1}}{P_{2}} \right)[/tex]
[tex]V_{2} = 1.44\,L[/tex]
The final volume is 1.44 liters.
3) From the Equation of State for Ideal Gases we construct the following relationship:
[tex]\frac{P_{2}}{P_{1}} = \frac{V_{1}}{V_{2}}[/tex] (1)
Where:
[tex]P_{1}, P_{2}[/tex] - Initial and final pressure, measured in kPa.
[tex]V_{1}, V_{2}[/tex] - Initial and final pressure, measured in mililiters.
If we know that [tex]\frac{P_{2}}{P_{1}} = 3[/tex], then the volume ratio is:
[tex]\frac{V_{1}}{V_{2}} = 3[/tex]
[tex]\frac{V_{2}}{V_{1}} = \frac{1}{3}[/tex]
Volume will decrease by approximately 67 %.
4) The Boyle's Laws deals with pressures and volumes.
What is the density of a sample with a mass of 5250g and a volume of 4.5mL
Answer:
1166.67
Explanation:
density=mass/volume
density= 5250/4.5
density=1166.67g/mL
why is atomic radi measured using the nuclues from 2 of the same atoms
Explanation:
Atomic radii is measured using the distance between nucleus of 2 atoms rather than the distance between the nucleus and outermost shell because:
- There is no clear/sharp boundary of the orbital. This is why it is called an electron cloud.
- Also, the exact location of the electron is not known. What is known is the probability of finding the electron there.
Due to this, it is not possible to measure the atomic radii precisely. That's why the distance between the nucleus of two atoms is used.
5
Increasing the amount of current flowing through a wire strengthens
what? *
O magnetic field
O polarity
O electromagnetism
solenoid
Answer:
Increasing the current would strengthen the
electromagnetisn
What volume of a 0.100 M AgNO3 solution is required to completely react with the CaCl2 in 3.00 L of a 0.100 M CaCl2 solution? The balanced chemical equation is: 2 JUpper A g upper N upper 0 subscript 3 plus upper C a upper C l subscript 2 right arrow 2 upper A g upper C l plus upper C a (upper N upper O subscript 3) subscript 2. L AgNO3
Answer:
6.00 LAgNO3
Explanation:
Got it right on Edge. :)
Answer:
B
Explanation:
How many moles of MgO are produced if 0.37 moles of O2 react with excess of Mg?
Answer:
yez so the answer is mg 1.0
Explanation:
The excess reactant is present in an amount that is greater than required. The amount of MgO that is produced in the reaction is 0.74 moles.
What is an excess reactant?An excess reactant is that reantant thatis present in an amount that is more than required.
Now we are told that the magnessium is the reactant in excess so we have to use the amount of oxygen.
The reaction is: 2Mg + O2 ---->2MgO
1 mole of O2 produces 2 mole of MgO
0.37 moles of O2 produces 0.37 moles * 2 moles/1 mole
= 0.74 moles
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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
5. How many Earths could fit between the Earth and the sun?
30
400
1200
12000
Please please please please help me
3) Find the mass, in grams, of 5.08 mol Ca(NO3)2
Answer:
833.12g
Explanation:
Use the mole=mass/mr equation (rearrange this to find mass)
Mr= 164
So, 5.08 x 164 = 833.12g
The mass in grams of 5.08 mol Ca(NO3)2 is =833.12g
What is a mole?
The mole is the amount of substance of a gadget which includes as many standard entities as there are atoms in zero.012 kilogram of carbon 12;
Molecular mass of Ca(NO3)2 = 40+(14+48)*2
=40+124
= 164 g
1 mole of Ca(NO3)2 = 164 g
5.08 mole of = 5.08*164g
=833.12g
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It late, I need help quick
Answer:
what is late ? there is no attachment ?
Answer:
For people asking for the questions
Explanation:
1. Plants that perform photosynthesis convert sun (solar) energy to
food energy.
Answer:
true
Explanation:
one reason is because plants need sunlight and water because it is their source of food
HELP ME PLEASEEEEE!!!!!!!!!!
Answer:
I dont know what the answer is
Explanation:
explain the laws of universal graviation?
Answer:
Newton's law of universal gravitation is usually stated as that every particle attracts every other particle in the universe with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
What mass of iron is formed when 240 g of iron(III) oxide reacts completely with carbon monoxide?
Answer:
168 g
Reaction:
[tex]Fe_{2}O_{3} + 3 CO >>> 2 Fe + 3CO_{2}[/tex]
Explanation:
First we need to figure out what is the formula mass (Mr) of Fe2O3 (Iron(III) oxide).
The atomic mass of Fe=56, O=16
Mr= 56+56+16+16+16=160 g/mol
We can now figure out the moles of the iron:
240/160 = 1.5 mol
Then we need to find the ratio to make Fe.
In the reaction, we know that 1 mole of Fe2O3 can make 2 moles of Fe. So 1.5 moles of Fe2O3 can make 3 moles of Fe.
And then we need to find the mass of the Fe.
3×56=168 g.
Hence 168g of the iron is made after the reaction.
The mass of a single gold atom is 3.27X10^-22 grams. How many gold Adams with there be in 57.8 mg of gold.
Answer:
18 * 10^19 atoms
Explanation:
We must first convert 57.8 mg to grams.
If 1000 mg = 1g
57.8 mg = 57.8/1000 = 57.8 * 10^-3 g
Now;
If 1 gold atom has a mass of 3.27X10^-22 grams
x gold atoms have a mass of 57.8 * 10^-3 g
x = 57.8 * 10^-3 g/3.27X10^-22 g
x = 18 * 10^19 atoms
How many lone pairs does this molecule have?
Answer:
Just 1 i.e., Option B.
Because except for top of the molecule, all other sides are filled with a letter meaning there is one free space.
Answer:
B
Explanation:
H . + H . -----> H:H {":" represents a covalent bond, that is, a shared pair of electrons}
A Lewis structure is a convention used to represent the covalent bonding in a molecule. Dots or lines are used to represent
valence electrons (electrons available for bonding). The Lewis structure for the hydrogen molecule is as follows.
H:H or H-H
A bonding pair is an electron pair shared between two atoms.
A nonbonding pair (lone pair, unshared pair) is a pair of electrons that remains on one atom and is not shared.
what is the meaning of flourish?
If I had 50 graham cracker squares, 15 marshmallows, and 100 little
chocolate pieces, how many total s'mores could I make before I ran out of
ingredients?
What 3 things will you do to dissolve a solid (salt) faster in a liquid (water)
Answer:
There are three ways to make solids dissolve faster: Break the solute into smaller pieces. Stir the mixture. * Heat the mixture.
Explanation:
Substances can dissolve in water three ways—by dissociation, dispersion, and ionization.
What is the pH of a solution with a (H+] = 0.80 M? *Please round your answer to the appropriate number of significant figures. Your answer can be in standard notatic "e" in place of x10.*
Answer:
The pH of a solution with a (H+] = 0.80 M is [tex]9.6 e^{-2}[/tex]
Explanation:
As we know
pH = -[log H+]
Substituting the value of H+ ion concentration in the above equation, we get -
pH = -log [0.80]
pH [tex]= -[-0.096] = 0.096 = 9.6 e^{-2}[/tex]
Waste water from nuclear power plants is generally
Answer:
waste water from nuclear power plant is
generally very harmful for our environment
and for everyone
hope it will help
Give two examples of elevation.
Answer:
An example of elevation is a plane flying at 36,000 feet above the ground. An example of elevation is a pope being raised to the position of saint. An example of elevation is a ballet dancer leaping three feet in the air. ... At 8,850 m (29,028 ft), the summit of Mount Everest is the highest elevation on Earth.
Explanation:
please mark me brainly!
If it takes 38.70 cm^3 of 1.90M NaOH to neutralize 10.30cm^3 of H2SO4 in a battery. What is the concentration of the H2SO4?
Answer:
3.57 M
Explanation:
The reaction that takes place is:
2NaOH + H₂SO₄ → Na₂SO₄ + 2H₂OFirst we calculate how many NaOH moles reacted, using the given concentration and volume:
38.70 cm³ = 38.70 mL1.90 M * 38.70 mL = 73.53 mmol NaOHThen we convert NaOH moles into H₂SO₄ moles, using the stoichiometric coefficients:
73.53 mmol NaOH * [tex]\frac{1mmolH_2SO_4}{2mmolNaOH}[/tex] = 36.765 mmol H₂SO₄Finally we calculate the concentration of H₂SO₄:
36.765 mmol H₂SO₄ / 10.30 mL = 3.57 M(Help would be greatly appreciated, chemistry is not my strong suit) How many moles of NaCl are present in a solution with a molarity of 8.59M and 125mL of a solution?
1. 1.07g
2. 62.7mol
3. 1.07mol
4. 62.7g
Molarity is a unit of concentration defined as the number of moles of solute (the substance being dissolved) per volume of solution (the solvent in which all the solute is dissolved). Mathematically, molarity is expressed as
[tex]M = \frac{\text{ mol solute}}{\text{ L solution}}[/tex].
In this question, we are given the molarity and the volume of a solution of NaCl. We can use this information to calculate the number of moles of NaCl present in the solution. Rearranging the equation to solve for moles of solute, we multiply the molarity by the volume of the solution (the units for volume must be in liters, so 125 mL is expressed as the equivalent 0.125 L):
[tex](8.59 \text{ M})(0.125 \text{ L}) = 1.07 \text{ moles of NaCl}.[/tex]
The question asks for the number of moles of NaCl in this solution, so number 3 would be correct.
How is the Methane on Titan similar to water on Earth?
Which of the following statements is true?
the answer is the third one
Explanation:
it just is I think
A horse weighs 240 kg. If its running at a speed of 18 m/s, what's the linear momentum of the horse
Answer: The answer is 4320
Explanation:
I got the answer correct
A student pushes a box with a force of 20 N to the right and another student pushes the box with a force of 5 N to the left.
What is the net force and direction in which the box moved?
The net force acting on the box is 15 N which is the difference of the two acting forces and the box shifts to the right in the direction in which greater amount of force is applied.
What is force?Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.
It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.
The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.
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