Answer:
It is a heterogeneous mixture
Two same charges: As charge increases, potential energy
Increases
Decreases
Stays the same ?
Answer:
decreases
i think so
byeeee
please help me answer this question?
how dose the scientific method help scientisis?
Answer:
It helps us to insure what will the current rate will be to those subject or nartual disaster can conquere
How is thermal energy generated?
Answer:
thermal energy is produced when a rise in temperature causes atoms and molecules to move faster and collide with each other.
Explanation:
I'm pretty sure its that. Hope its right!
Answer:
says wrong
Explanation:
Help I really need help and don't search it on go.ogle this is a school assignment and i can get in trouble thank you sm :)
Based on your research of nuclear energy thus far, how do you feel about the use of nuclear fission as a source of energy?
Answer:
Nuclear fission is almost 5 times times more efficient than traditional fossil fuels at producing energy. That's a lot of energy packed into a small space. Nuclear energy is more efficient, which means it uses less fuel to power the plant and produces less waste.
Explanation:
The following list contains some common polyatomic ions. Using the charge on these ions and the idea of valence,
predict the formulas for the compound formed from the following:
potassium and permanganate
A) K(MnO4)
B) K4MnO4
C) K4MnO
D) KMnO4
Answer: or Sodium carbonate.
or Potassium permanganate
Explanation: ion carries 1 + charge whereas carbonate ion carries overall charge of -2. So for every carbonate ion, two sodium ions combine to balance the charges and thus form a stable compound,
Potassium ion carries 1 + charge where as permanganate ion carries overall charge of -1. So for every permanganate ion, one potassium ion combines to balance the charges and thus form a stable compound, Explanation:
Jude has a 30.00 L cylinder full of acetylene gas that he will use for welding in his workshop. If the pressure of the cylinder is 1720 kPa and the workshop is at 20.0 °C, then how many moles of acetylene are in the tank? (Show work)
Answer:
About 21.2 moles.
Explanation:
Recall the ideal gas law:
[tex]\displaystyle PV = nRT[/tex]
Where P is the pressure of the gas; V is its volume; n is the number of moles of gas; R is the universal gas constant; and T is the absolute temperature.
Rearrange to solve for n:
[tex]\displaystyle n = \frac{PV}{RT}[/tex]
Because R has units of L-atm/mol-K, convert the pressure to atm:
[tex]\displaystyle 1720 \text{ kPa} \cdot \frac{1\text{ atm}}{101.3\text{ kPa}} = 17.0\text{ atm}[/tex]
And convert from Celsius to kelvins:
[tex]\displaystyle \begin{aligned}T _ k & = T_C + 273.15 \\ \\ & = (20.0) + 273.15 \\ \\ & = 293.2\text{ K} \end{aligned}[/tex]
Hence substitute and evaluate:
[tex]\displaystyle \begin{aligned} n & = \frac{PV}{RT} \\ \\ & = \frac{\left(17.0\text{ atm})(30.00\text{ L})}{\left(\dfrac{0.08206\text{ L-atm}}{\text{mol-K}}\right)(293.2\text{ K})} \\ \\ & = 21.2\text{ mol } \end{aligned}[/tex]
In conclusion, there are about 21.2 moles of acetylene in the tank.
Why does water roll off of dry ice?
PLEASE HELP ASAP
Label the correct descriptors (volume, temperature, pressure, moles) *
Explanation:
1. volume
2. pressure
3. moles
4. temperature
5. temperature
6. moles
7. pressure
8. volume
9. pressure
10. volume
Chemical reactions spontaneously occur when the free energy of the products is ___________ the free energy of the reactants.
Answer:
lower
Explanation:
For a spontaneous process, the standard Gibbs free energy change has to be less than zero:
∆G° < 0 → spontaneous
∆G° > 0 → non- spontaneous
∆G° = 0 → system is at equilibrium
For a negative change in standard Gibbs free energy, the Gibbs free energy of the products has to be lower than that of the reactants since Gibbs free energy change is the standard Gibbs free energy of products minus that of the reactants.
[tex]\boxed{∆G= G°(products) -G°(reactants)}[/tex]
Mathematical derivation:
G°(products) -G°(reactants) < 0
G°(products) < G° (reactants)
✩ Note that in the image attached, the Gibbs free energy change is usually denoted by a single-headed arrow, from reactants to products.
What is free energy?
the amount of energy available to do useful workit tells us the spontaneity of a chemical processStandard state conditions
You may have noticed the superscript ° after the letter G (which stands for Gibbs free energy), and this symbol denotes standard state.implies that the pressure of a gas is 1 atmimplies that for a solute, its concentration is 1MSpontaneity
the ability of a reaction to occur without outside interventionFor example, an ice melting in a cup of hot tea is a spontaneous process (i.e. the transfer of heat from a hotter object to a cooler object is spontaneous).In a calorimeter, 10.0 g of ice melts at 0oC. The enthalpy of fusion of the ice is 334 J/g.
How much heat was absorbed?
A.) 0.33 kJ
B.) .34 kJ
C.) 33.4 kJ
D.) 334 kJ
Answer:
D
Explanation:
In the problem above it is
q = mass x heat fusion
q = 10 g x 334 J/g = 3340 J. Since the ice is absorbing heat it is + 334 J.
Answer:
3.34 kJ
Explanation:
took the test
Which two characteristics describe reputable digital resources?
A.They contain an author’s name.
B.They sell products and services.
C.They are created by high school students.
D.They have been updated recently.
E.They can be edited by readers.
The two best characteristic best describes the reputable digital resource are the precision and accuracy.
Explanation :The more the accuracy the better the digital product.
Any slight error on application or usage may result in severe loss on product manufacturing and also loss in application purpose.
How does the difference in the mass of the ball affects the changes in the distance of the object
Answer:
In very simple words ,
As the weight increases the gravitational force acting on the ball increases and thus it effects the change in the distance of the ball as the ball will fall very close to its initial distance if it has more mass and shall go far if the mass is less .
will lithium oxide ever be a liquid on any of the planet's or moon in our system? yes or no?
Answer:
no
Explanation:
trust me i got it right on my test
Lithium oxide ever be a liquid on any of the planet's or moon in our system - No.
What is lithium oxide?Lithium oxide is an inorganic compound with the chemical formula Li₂O, and it present in white solid form.
Lithium oxide is a strong base and on reacting with water will form lithium hydroxide. In this Lithium oxide compound atrong ionic bonds is present with great attraction force. Melting point of Lithium oxide is 1,438 degree celsius and no planet and moon have this much of temperature.
So, it is not possible to get liquid Lithium oxide in our system.
Hence, answer is NO.
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How much concentrated 18 M sulfuric acid is needed to prepare 250 mL of a 6.0 M solution?
Answer:
I believe 83.33 mL is needed. :)
Which natural polymers are involved with making clothing?
A. wool, silkworm cocoon, and cellulose
B. wool, nylon, and DNA
C. starch, nylon, and DNA
D. starch, silkworm cocoon, and cellulose
Answer:
The answer is A!!!
Explanation:
just took the quiz on edge:)
Answer:
The answer that you are looking for is A.) wool, silkworm cocoon, and cellulose
Explanation:
I got it right on edge 2020. 100%
A chemist conducts an experiment in which 2. 00 l of hydrogen gas is collected over water at 1. 00 ATM and 298. 15 K. The phrase over water means that the gas was collected by bubbling it into an inversed bottle filled with water which is sitting in a water bath. However the gas collected is now saturated with water vapor. The partial pressure of water vapor at 298. 15 K is 0. 0 300 ATM. Using Dalton's law calculate the pressure of the hydrogen gas in ATM
Answer:According to Dalton's law of partial pressures, the total pressure is equal to the sum of the partial pressures of each gas. In equation form, this looks like this ...
Pt = P1 + P2 + ...
Pt = total pressure
P1 = partial pressure of gas 1
P2 = partial pressure of gas 2
Explanation:
What are the 3 principles of the Kinetic molecular theory?
The kinetic molecular theory is a classical model that explained the movement of gas particles. It started about constant motion and collision, and the relation of KE with temperature.
What is Kinetic molecular theory?The Kinetic molecular theory was given by several scientists including Rudolf Clausius, Boltzman, Avogadro, and Graham. It stated several principles based on observations and experiments.
It stated that matter is composed of particles that are constantly in motion and have been known to show the constant perfect elastic collision due to the addition or removal of energy.
The kinetic energy of the particles is directly proportional to the temperature of the ideal gas condition and is involved in changes in the state of matter. Higher temperature exhibits more collisions.
Therefore, the Kinetic molecular theory stated about the particles, motion, collision, temperature, etc.
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What is true about all real machines?
= equals
> greater than
work output may be < or > work input
work output > work input
work output < work input
work output = work input
Answer:It is always greater than the actual mechanical advantage because all machines must overcome friction. The mechanical advantage of a machine may be greater than, less than, or equal to 1, depending on the type of machine.
Milk, if 2.00 liters has a mass of 2.06 kg. Find the density in g/cm^3
Answer:
The answer is 1.03 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
1 kg = 1000 g
2.06 kg = 2060 g
1 L = 1000 cm³
2 L = 2000 cm³
mass = 2060 g
volume = 2000 cm³
We have
[tex]density = \frac{2060}{2000} = \frac{103}{100} \\ [/tex]
We have the final answer as
1.03 g/cm³Hope this helps you
Answer:
The density of milk is 1.03 g/cm³.
Explanation:
Given data:
Volume of milk = 2.00 L
Mass of milk = 2.06 kg
Density of milk = ?
Solution:
We know that density is equal to the mass divided by volume.
we will convert the unit first because we require the density in g/cm³.
2.06 kg ×1000 g/ 1 kg = 2060 g
2.00 L × 1000 mL / 1L = 2000 mL
d = m/v
d = 2060 g/2000 mL
d = 1.03 g/mL
mL = cm³
d = 1.03 g/cm³
Thus, density of milk is 1.03 g/cm³.
When 2 small figures are pulling in the opposite direction, their
individual forces
Answer:
To determine if the forces acting upon an object are balanced or unbalanced, an analysis must first be conducted to determine what forces are acting upon the object and in what direction. If two individual forces are of equal magnitude and opposite direction, then the forces are said to be balanced
Explanation:
How does the shape of a molecule affect the polarity of the molecule?
A. A molecule that is symmetrical in shape will have nonpolar bonds.
O B. A molecule that has a symmetrical shape will be a nonpolar
molecule.
C. A molecule with polar bonds will be polar, regardless of its shape.
D. A molecule that is not symmetrical will be a nonpolar molecule.
Answer:
It is A
Explanation:
If you think about it, no-polar covalent bonds are in a symmetrical line, and polar bonds are on the diagonals of the center atom.
I hope I helped :)
Answer:b
Explanation:
The haber process can be used to produce ammonia (nh3) from hydrogen gas (h2) and nitrogen gas (n2). the balanced equation for this process is shown below. 3h2 n2 right arrow. 2nh3 the molar mass of nh3 is 17.03 g/mol. the molar mass of h2 is 2.0158 g/mol. in a particular reaction, 0.575 g of nh3 forms. what is the mass, in grams, of h2 that must have reacted, to the correct number of significant figures? 0.1 grams 0.102 grams 0.10209 grams 0.1021 grams
The mass of hydrogen reacted with nitrogen to give ammonia is 0.1 grams.
How we calculate the mass from moles?
Mass of any substance will be calculated by using the moles as:
n = W/M, where
W = required mass
M = molar mass
Given chemical reaction is:
3H₂ + N₂ → 2NH₃
Moles of 0.575 g of NH₃ will be calculated as:
n = 0.575g / 17.03g/mol = 0.033 moles
From the stoichiometry of the reaction, it is clear that:
2 moles of NH₃ = produced by 3 moles of H₂
0.033 moles of NH₃ = produced by 3/2×0.033=0.0495 moles of H₂
Now we calculate the mass of hydrogen from the given moles and molar mass as:
W = (0.0495mol)(2.0158g/mol) = 0.09 grams = 0.10 grams
Hence, option (a) is correct i.e. 0.1 grams.
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A sample of hydrogen at 39°c exerts a pressure of 0. 163 atm. the gas is heated to 63 °c at
constant volume. what will its new pressure be?
answer in units of atm.
Answer:
[tex]p2 = 0.175atm[/tex]
Amylase was shown to work best at a ph of 7 in comparison of a ph of 2. If the stomach juices have a ph of 2, what do we know about the function of salivary amylase within the stomach?.
The salivary amylase did not perform well if the pH becomes lower because it needs neutral pH for performing its functions.
Effect of pH on the enzymeWe can say that the salivary amylase did not perform their function very well within the stomach due to unfavourable environment such as lower pH. Due to lower pH, the enzyme structure is damaged so unable to perform its function so we can conclude that the salivary amylase did not perform well if the pH becomes lower.
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I need help with an science IXl i need to go up to 8- its about comparing cells and cell parts somebody please save me!
Answer:
o cany give because of i am in 9th
Which type of substance is water able to dissolve? nonpolar ionic polar ionic and polar.
Water is able to dissolve polar or ionic solutes.
What is Water?Water is a liquid that is transparent or colourless, tasteless and odourless which form the Earth hydrosphere and can be use for fringing, cooking, washing, feeding animals and so on.
What is Polar Substance?Polar or ionic solvents dissolve polar or ionic solutes. Polar Substance are substances that can dissolve in water completely or polar solvent.
Water is a polar solvent and it can dissolve polar solute.
Therefore, Water is able to dissolve polar or ionic solutes.
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Answer:
the answer is d ionic and polar
Explanation:
just took the quiz and got it right
How might microorganisms be spread?
Answer:
Asexual reproduction
Explanation:
for microorganism to reproduce and spread, the microorganism uses a process of cell division called mitosis, where the microorganism divides it self into two individual microorganism by mitosis using Asexual reproduction (an organism dividing itself into 2 individual organism not involving sexual activities, called Asexual reproduction). for these microorganisms to be able to reproduce Asexually that makes it much faster for these organisms to spread much more faster then mammals of other Sexually reproductive organisms.
How many moles are in 25 grams of oxygen?
The number of moles in 25 grams of oxygen is equal to 1.56 moles, as 16 grams of oxygen contain one mole.
What is a mole?A mole is a unit measurement that is used to calculate a large number of chemical entities such as atoms, molecules, ions, or other particular particles.
The mass of the one mole of any chemical element in the periodic table is called atomic mass and that of any compound is known as molar mass.
The number of chemical entities present in one mole was found to be equal to approximately 6.023 × 10 ²³ which is known as Avogadro’s number. In the calculation of the number of moles of a substance the given mass of the substance is divided by its molecular mass.
Given, the mass of the oxygen = 25 grams
As we know the atomic mass of oxygen is equal to 16g/mol
So 16 g of oxygen contains moles = 1
Then 25 g of oxygen will contain moles = 25/16 = 1.56 mol
Therefore, the moles of oxygen in 25 grams are equal to 1.56.
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Calculate the atomic mass of Carbon if the two common isotopes of carbon have masses of 12.000 amu (98.89 % abundance) and 13.003 amu (1.11 % abundance).
Answer:
Average atomic mass =
(mass of isotope)(%abundance)+(mass of isotope) ( abundance ) / 100
avg. atomic mass =(12)(98.89) + (13)(1.11) /100
=1186.68 + 14.43 / 100
=1201.11 / 100
=12.0111