Answer:
There are
0.0642 mol Na
2
CO
3
in
6.80 g
.
Explanation:
The chemical formula of sodium carbonate is
Na
2
CO
3
. The molar mass of sodium carbonate is
105.988439 g/mol
.
A company is using bioleaching to extract copper from copper ores. This involves using bacteria to produce solutions that contain copper
compounds. These solutions are called... what??
Answer:
leachate
Explanation:
Bioleaching. Certain bacteria can break down ores to produce an acidic solution containing copper(II) ions. The solution is called a leachate and the process is called bioleaching . Bioleaching does not need high temperatures, but it produces toxic substances, including sulfuric acid, which damage the environment.
Hope this helps:)
If the momentum of a car is reduced by half, assuming mass did not change, what must also have been reduced by half?
Answer:
Velocity is halved
Explanation:
Momentum is contingent on mass and velocity. The quantity of motion in a body is called the momentum of the body.
Momentum = mass x velocity
Now, if mass does not change and momentum is reduced by half, it suggests that the velocity was reduced by half.
Velocity is directly related to momentum.
1. What part of the human body has the same role as the processor on a computer?
2. What part of the human body has the same job as the wires and circuits in a computer?
Answer:
Starting from head to toe: A human brain is like a computer's central processing unit (CPU). In order for both the human body and computer to perform tasks, they need a brain or CPU. The brain and CPU communicate with other parts of the computer.Jan 27, 2011
Explanation:
An element ‘A’ has valency +3, while another element ‘B’ has valency -2. Give the formula of their
compound formed when ‘A’ reacts with ‘B’.
Answer:
A2B3...........................
Why can we not use the Nitrogen that we breath in
Answer:
Nitrogen is an inert gas — meaning it doesn't chemically react with other gases — and it isn't toxic. But breathing pure nitrogen is deadly. That's because the gas displaces oxygen in the lungs. Unconsciousness can occur within one or two breaths, according to the U.S. Chemical Safety and Hazard Investigation Board.
Answer:
because it is an insert gas and it is very dangerous for ear and our nose
Whitney is making sweet tea. She adds 15 grams of
sugar to the 100 mL of tea. Once the sugar
dissolves, what is the mass of the sugar?
Answer:
the mass of the sugar would stay the same i think.
Explanation:
The table gives the solubility of each substance in 100
g water at 20°C. Use the drop-down menus to rate the solubility of each substance from greatest (1) to least
(4).
Calcium chloride
Calcium bromide
Calcium carbonate
Calcium bicarbonate
Answer:
2 1 4 3
Explanation:
Polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore the order of solubility is calcium bromide> calcium chloride>calcium bicarbonate>calcium carbonate.
What is solubility?Solubility shows the extent of solubility of a solute in solvent to make a solution. Solute is substances that is present in small amount. solvent is a substance that is present in large amount. Its SI unit is gram per liter or g/L.
Bond strength affect the solubility of a solute in solvent. weaker the bond strength is, more the solubility is. The weaker bond can be easily broken by water molecule
Calcium bromide is more soluble than calcium chloride as the bond strength in calcium bromide is weaker than calcium chloride. Calcium bicarbonate is more soluble than calcium carbonate.
Therefore the order of solubility is calcium bromide> calcium chloride>calcium bicarbonate>calcium carbonate.
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The density of red wine is 1.01g/cm3 and the density of olive oil is 0.92g/cm3.A salad dressing that consisted of these two ingredients was left sitting too long.The ingredients separated in the bottle ,which ingredient is which layer? Explain.
Answer:
The olive oil will be on top of the vinegar, this is because the density is more
Explanation:
since vinegar has a higher density than oil it will sink to the bottom of the bottle. subsequently oil will raise up. thus oil higher layer vinegar lower layer! :) . concentration in g/L....what u are given is 5.4g and 50ml
so first change the ml into L
50ml = 0.050L
now... 5.4g/0.050L = 108g/L
resolve in significant figures is 1.1 x 10^2 g/L
b. molarity = mol/L
L = 0.050 (calculated from above)
now we only have to convert the grams (5.4g) into mols
there are three elements in sucrose ( C = carbon, H = hydrogen
and O = oxygen)
look at the periodic table and find their molar mass (atomic weight)
Carbon = 12.0g/mol
Hydrogen = 1.00g/mol
Oxygen = 16.0g/mol
Sucrose contains 12 carbons, 22 hydrogens, and 11 oxygens
So the total molar mass of sucrose =
Carbon - 12 x 12.0 = 144
Hydrogen - 22 x 1.00 = 22
Oxygen - 11 x 16.0 = 176
Total = 144 + 22 + 176 = 342g/mol
Now u have 5.4grams of sucrose to change to mols u:
5.4 grams x 1 mol/ 342grams
in other words 5.4 grams / 342 grams leaving u with mols
= 0.0158 mols
now your concentration in molarity will be:
0.0158 mols / 0.050L = 0.32M (two significant figures)
and the unit is M which stands for mol/L
c. you are given 7M (aka mol/L)
you are given 100ml which equals 0.1L
7 mol/L x 0.1L = 0.7mol
all u have left to do is change the 0.7 mol back into grams
to do that we do the opposite of what we did in part b
in part b u took grams and changed it into mols
here we are taking mols and changing it back into grams
from part b we calculated the total molar mass = 342g/mol
so:
0.7 mol x 342 g/mol = 239.4grams
resolve into significant figures = 2 x 10^2 grams
Relate pH values of 9.1, 1.2, and 5.7 to hydronium and hydroxyl ion concentration.
Answer:
9.1 = basic 1.2= very acidic 5.7= acidic
Explanation:
explain what is earthquakes and volcanoes
Explanation:
There is no ostensible relation between earthquakes and volcanoes though there are zones on earth where both natural...
• Volcanoes result from openings in the surface of the earth that brings along hot magma (molten rocks) with its wake
Answer:
Earthquakes are when the earth starts to movers and usually cracks open.
Volcanoes are big like of like spouts that go from under the ground to as tall as a small mountain. When erupted the will spit out lava and magma from the top.
Explanation:
Hope this Helps!
:)
At the Beltway Outlet store, you buy x computer games for 13$ each and a magazine for 4$. Write an expression in simplest form that represents the total amount of money you spend. Someone please help
Answer:
y = 13x + 4
Explanation:
Given parameters:
number of computer games bought = x
cost of each games = $13
number of a magazine = 1
cost of magazine = $4
Unknown:
Total amount of money spent = ?
Solution:
The total amount spent;
let total amount = y
y = total cost of magazine + total cost of computer games
total cost of magazine =$4
total cost of computer games = 13x
y = 13x + 4
Chemistry, please help
Answer:
yeap this substance can conduct electricity
Which situation provides the best evidence that a chemical reaction is taking place?
Answer: The following can indicate that a chemical change has taken place, although this evidence is not conclusive: Change of odor.
Explanation:
Cavendish carried out a second experiment to test the properties of the hydrogen gas produced in the experiment. Was this experiment also a chemical reaction?
Answer:
Yes, this experiment is also an example of a chemical reaction. The original substance, hydrogen, disappeared, and a new substance, water, was formed.
Explanation:
Answer:
Yes, this experiment is also an example of a chemical reaction. The original substance, hydrogen, disappeared, and a new substance, water, was formed.
Explanation:
This was the answer straight from Plato. I hope that this helped you, please mark me the brainiest, like and rate my answer if it did! :)
a group of the periodic table is called
Answer:
The elements are arranged in seven horizontal rows, called periods or series, and 18 vertical columns, called groups.
Explanation:
In chemistry, a group (also known as a family) is a column of elements in the periodic table of the chemical elements. ... Groups may also be identified using their topmost element, or have a specific name. For example, group 16 is also described as the "oxygen group" and as the "chalcogens".
(hope this helps ^^)
how can alcohol content be increased
Answer:
Alcohol is a byproduct of the fermentation process, which takes place when the yeast converts the sugars derived from the grain. Knowing that, you can increase the alcohol by volume (ABV) by increasing the size of the grain bill or increasing the amount of malt extract used.
how does science look at man
A helium balloon in a closed car occupies a volume of 1.32 L at 30.0°C. If the car is parked on a hot day and the volume of the balloon increases to 2.50 L what is the temperature in the car, assuming the pressure remains constant?
Answer:
T₂ = 573.86 K
Explanation:
Given data:
Initial volume = 1.32 L
Initial temperature = 30.0°C (30+273 = 303 K)
Final volume = 2.50 L
Final temperature in car = ?
Solution:
Solution:
The given problem will be solve through the Charles Law.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
T₂ = V₂T₁/V₁
T₂ = 2.50 L × 303 K / 1.32 L
T₂ = 757.5 L.K / 1.32 L
T₂ = 573.86 K
How many hydrogen atoms are in the following molecule of ammonium sulfide? (NH4)2S
a. 2
b. 4
c. 8
d. 16
Answer:
[tex]\boxed {\boxed {\sf C. \ 8 \ hydrogen \ atoms}}[/tex]
Explanation:
There are "2 parts" to the molecule S(NH₄)₂
The ammonium (NH₄) The sulfide (S)Let's focus on the ammonium, since it contains the hydrogen.
There is 1 Nitrogen atom (no subscript) and 4 hydrogen atoms ( subscript of 4).
But, this is only for 1 molecule of ammonium. If we look back at the original molecule, there is a subscript of 2 around (NH₄). This indicates there are 2 molecules of ammonium.
There are 4 hydrogen atoms in 1 molecule. So, to find the number in 2 molecules, simply multiply 4 by 2.
4 H atoms in 1 molecule * 2 molecules = 8 H atomsThere are 8 hydrogen atoms in S(NH₄)₂
You can make a solute dissolve more quickly in a solvent by?
A. Adding more solute
B. adding ice
C. Heating the solvent
D. Removing some solvent
The solute molecules will be more readily dissolved in the solvent molecules by heating the solvent. Thus, option C is correct.
The dissolution of solute molecules in the solvent molecules has been based on the attraction between the solute and solvent. The higher interaction between the solute and solvent molecules has been responsible for higher solubility.
The solute molecules have interactions present within them. This limits the interaction of the solute with solvent, and thereby the solubility. With the gain in energy by the solute molecules, there have been lesser interactions between solute molecules, and they are available for interacting with the solvent molecules.
The increased interactions between the solute and solvent molecules by the gain of energy due to heating have been responsible for increased solubility. Thus, option C is correct.
For more information about solubility, refer to the link:
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The image shows particles of salt dissolved in water.
How will the arrangement of salt particles most likely change?
Salt particles will move toward the left through diffusion.
Salt particles will move toward the left through active transport.
Salt particles will move toward the right through diffusion.
Salt particles will move toward the right through active transport.
Answer: Hope it may help you
Explanation:
Diffusion can be defined as the movement of particles from a region where there a more concentration of solute to the region having less concentration of the solute.
Here, the salt particles will move from right side of the box to the left side of the box.
This is because the right side has more particle and the left side has less particles so they will move towards the left side.
Answer:
A
Explanation:
The electronegativity values of carbon, hydrogen, and nitrogen are compared in the table.
Comparison of
Electronegativity
Element Electronegativity
Carbon
2.5
Hydrogen 2.1
Nitrogen 3.0
Which of the following statements is true about the strength of the intermolecular forces in CH4 and NH3? (4 points)
Answer:
C. CH₄ is less than NH₃ because the NH bond is more polar than the CH bond
Explanation:
The intermolecular forces between ammonia is far stronger than for methane. Between the molecules of ammonia we have the presence of hydrogen bonds. This bond is absent in methane.
Hydrogen bonds are one of the strongest intermolecular forces. It is as a result of the electrostatic attraction between the hydrogen atom of one molecule and the electronegative atom N, O and F of another molecule.
This strong interaction is absent in methane which has just dipole - dipole attraction.The strength of the hydrogen bond depends on the electronegativity of the combining atoms.
Addie mixes together a solution of 10 grams of
salt and 15 mL of hot water. What is the total
mass of the solution?
Answer: 150 grams
Explanation: m = V × ρ
= 15 milliliter × 10 gram/cubic centimeter
= 15 cubic centimeter × 10 gram/cubic centimeter
= 150 gram
What is the physical and chemical properties of oxygen element??
Answer:
At standard temperature and pressure (STP), two atoms of the element bind to form dioxygen, a colorless, odorless, tasteless diatomic gas with the formula O2. Oxygen is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element.
Answer:
Oxygen is a colorless, odorless, tasteless gas. It changes from a gas to a liquid at a temperature of -182.96°C (-297.33°F). The liquid formed has a slightly bluish color to it. Liquid oxygen can then be solidified or frozen at a temperature of -218.4°C (-361.2°F).
Explanation:
Describe the process of evaporation condensation, and precipitation
Answer:
eva... water to gaseous foum .... condensation liquid to solid and perp ..... water that is falling out of the sky, this could be rain, drizzle, snow, sleet, hail or something rarer!Answer:
Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase. Precipitation is water released from clouds in the form of rain, freezing rain, sleet, snow, or hail. Condensation is the process by which water vapor in the air is changed into liquid water.
Explanation:
(02.05 LO
Which type of heat transfer takes place through electromagnetic waves? (3 points)
RADIATION ❤️
We know that radiation is defined as he transfer of heat energy by electromagnetic radiation.
What will weigh more when a chemical change is complete? The reactants before the
chemical reaction, or the product after the reaction is complete?
A.The reactant will
weigh more than
the product
B. They both will loose
mass after the
reaction
C. They both will weigh
the same
D.The product always
weighs more than
the reactant
Plzzz Hurry!!!!! This is urgent
Answer:
I guessed and got c and got it right
Explanation:
When a chemical change is complete the reactants before the chemical reaction and the products after the chemical reaction will weigh the same.
Explanation:
The law of conservation of mass states that 'in a chemical reaction, mass can neither be created nor be destroyed.In accordance with this law, the total mass of reactants before the chemical reaction is equal to the total mass of the products after the chemical reaction.In chemical reaction mass of the reactants and products remains conserved.The number of atoms on the reactant side is always equal to the number of atoms on the product side.So, from this, we can conclude that when a chemical change is complete the reactants before the chemical reaction and the products after the chemical reaction will weigh the same.
Learn more about the 'law of conservation of mass' here:
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Convert from 300 calories to calories (kicalories)?
Please help mee
Answer:
0.3 kicalories
Explanation:
300/1000
=0.3
PLS GIVE BRAINLIEST
Help please If there are 10 moles of HCl gas occupying 15L at 350°C, what is the pressure? Be sure to show the setup and
the final answer and unit.
Show Your Work
Answer:
P = 34.1 L
Explanation:
Given data:
Number of moles = 10 mol
Volume occupy = 15 L
Temperature = 350°C
Pressure of gas = ?
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
Now we will convert the temperature.
350+273 = 623 K
by putting values,
P×15 L = 10 mol ×0.0821 atm.L/ mol.K ×623 K
P = 511.48atm.L/15L
P = 34.1 L
why is 99 not a prime number
Explanation:
99 is not a prime number because it can be multiplied by itself and by other numbers
99*1
9*11
Answer:
A prime number is a number that can only be divisible by ±itself and ±1
but 99 can be divisible by ±3; ±11 => 99 isnt a prime number
Explanation: