Answer:
There are
1.479
×
10
−
13
concentration of hydrogen ions
m
o
l
L
.
Explanation:
Because pH is a logarthmic scale, we can use the formula:
[
H
+
]
=
10
-pH
. Where...
=>
[
H
+
]
is the concentration of hydrogen ions in the solution.
=>
p
H
is the pH of the solution.
=> Where
10
is the base of the power - it's a logarithm formula.
We can now just sub in the values and solve for [
H
+
]
.
[
H
+
]
=
10
-pH
=
10
−
(
12.83
)
=
1.479108388
×
10
−
13
We can round (if required) to
1.479
×
10
−
13
.
Thus, there are
1.479
×
10
−
13
concentration of hydrogen ions
m
o
l
L
.
Hope this helps :)
*
What does the temperature measure?
A)Total Kinetic Energy of Matter
b) Average Potential Energy of Matter
C) Average Kinetic Energy of Matter
D)Total Potential Energy of Matter
Answer:
it would be C average kinetic energy
A first order reaction has a rate
constant of .001 sec-1. What is the
half life in seconds) of this reaction if
the initial concentration is 2.0 M?
-hurry it’s a test
Answer:
one-half
Explanation:
cuz for a first order reaction is a half life independent of concentration and constant over time
A chemical reaction takes place in a closed system. The mass of the reactants before the reaction was 35 grams. What must the mass of the products of the reaction be, according to the law of conservation of mass?
If you have 4 moles of barium hydroxide, how many moles of oxygen atoms do you
have?
Answer:
8 moles of oxygen.
Explanation:
The chemical formula for barium hydroxide is Ba(OH)₂
This means one mole of barium hydroxide contains one mole of barium, two moles of hydrogen, and two moles of oxygen. If you have four moles of Ba(OH)₂ you will have four times the amount that is found in one mole.
4 moles of Ba(OH)₂ will have 8 moles of oxygen.
The number of moles of oxygen atoms we have in the compound is 8 moles .
The chemical equation for barium hydroxide is as follows:
Ba(OH)₂
According to the compound we have 1 atom of barium, 2 atoms of oxygen and 2 atoms of hydrogen.
Therefore, 4 moles of the compound can be represented as follows;
4 Ba(OH)₂
This means we have 4 atoms of barium, 8 atoms of oxygen and 8 atoms of hydrogen.
Therefore, we have 8 moles of oxygen atoms or 4 moles of oxygen molecules.
learn more: https://brainly.com/question/12228235?referrer=searchResults
(NH4)2SO4(s) + 2NaOH(aq) → Na2SO4(aq) + 2NH3(g) + 2H200)
What mass of sodium hydroxide is required to react
completely with 15.4 g of (NH4)2SO4?
Answer:
9.36 grams NaOH needed
Explanation:
Given Rxn
(NH₄)₂SO₄(aq) + 2NaOH(aq) → Na₂SO₄(aq) + 2NH₃(g) + 2H₂O shows a molar reaction ratio of 1-mole (NH₄)₂SO₄ to 2-moles NaOH. If the 15.4 gram sample of (NH₄)₂SO₄ is converted to moles, then 2 times moles of ammonium sulfate will be the molar amount of NaOH needed to completely react. Complete computation by converting moles to grams NaOH; that is, multiply by formula wt. of NaOH (=40g/mol).
moles (NH₄)₂SO₄ = 15.4g/132.14g·mol⁻¹ = 0.117 mole (NH₄)₂SO₄.
moles NaOH = 2 x 0.117-mole = 0.234-mole NaOH needed.
∴grams NaOH needed = 0.234-mole NaOH x 40-g NaOH/mole NaOH = 9.36 grams NaOH needed. (3 sig. figs.)
Then multiply 0.117 mole by 2 => 0.234 mole NaOH needed to completely react with the 0.117 mole (NH₄)₂SO₄. Converting to mole to grams, multiply by formula wt. of NaOH => 0.117 mole x 40g/mole = 9.36 grams NaOH needed.
Antoine put some metal into a container with air. He closed the container. He measured the weight of the closed container with the metal; it weighed 250 grams. Then he heated the container until the metal changed colors. He weighed the closed container after heating. Predict the weight of the closed container (greater than 250 grams, equal to 250 grams, less than 250 grams) after heating. Enter your answer in the space here.
Answer:
the same
Explanation:
due to the law of conservation of mass, the mass will not change
Answer: The mass will be the same it will not be able to change.
Explanation: due to the law of conservation of mass, the mass will not change telling us that the mass and the grams or whatever it was saying on there will stay exactly no change. so the 250 grams will not change.
Ella is interested in combining substances to form a new material.
She read about some of the products chemists have discovered. She learned that sometimes synthetic materials are created accidentally. For instance, a chemist working on plastic gun sights synthesized a very sticky material accidentally. Which product had he accidentally made?
A. a coil spring toy
B. a heavy-duty adhesive glue
C. a new sweetener
D. a non-stick surface
please hurry
Find the mass of 2 moles of:
1. Oxygen atoms
2. Oxygen molecules
Answer: 1. 2 moles of oxygen atoms = 32 grams
2. 2 moles of oxygen molecules = 64 grams
Explanation:
According to avogadro's law, 1 mole of every substance weighs equal to its molecular mass and contains avogadro's number of particles.
1 mole of oxygen atom (O) weighs = 16 g
Thus 2 moles of oxygen atom (O) weighs = [tex]\frac{16}{1}\times 2=32 g[/tex]
Also 1 mole of oxygen molecule [tex](O_2)[/tex] weigh = 32 g
Thus 2 moles of oxygen molecule [tex](O_2)[/tex] = [tex]\frac{32}{1}\times 2=64 g[/tex]
under what conditions will the particles of a substance have the most energy
Answer:
All particles have energy, and the energy varies depending on the temperature the sample of matter is in, which determines if the substance is a solid, liquid, or gas. Solid particles have the least amount of energy, and gas particles have the greatest amount of energy.
Suppose you wanted to know how many grams of KCl would be left if 350mL of
a 2.0M KCl solution were evaporated to dryness.
b. How would heating the solution affect the mass of KCl?
Answer:
52.2g of KCl would be left
The mass of KCl will remain despite the solution is been heated
Explanation:
When you are heating a solution, just the solvent (In this case, water), will be evaporated and, in theory, the mass of KCl will remain despite the solution is been heated.
Now, the mass of KCl that you can obtain from 350mL of a 2.0M solution will be:
Moles KCl:
350mL = 0.350L * (2.0mol / L) = 0.700 moles
Mass KCl -Molar mass: 74.55g/mol-:
0.700mol * (74.55g/mol) = 52.2g of KCl would be left
what element has similar chemical properties as magnesium (Mg) and strontium (Sr) It has an atomic number less than krypton (Kr) but greater than magnesium.
Answer:
Calcium
Explanation:
It has similar properties as Magnesium (Mg) and Strontium (Sr)
The Atomic number of Calcium (Ca) is 20
The Atomic number of Krypton is 36
The Atomic number of Magnesium is 12
12 < 20 < 36
6HCl(aq) + 2A1)
-
3H2(g) + 2AlCl3(aq)
1. How many moles of hydrogen are produced from 1.20 moles of aluminum?
Answer: 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
The balanced chemical reaction is:
[tex]6HCl(aq)+2Al(s)\rightarrow 3H_2(g)+2AlCl_3(aq)[/tex]
According to stoichiometry :
2 moles of [tex]Al[/tex] produce = 3 moles of [tex]H_2[/tex]
Thus 1.20 moles of [tex]Al[/tex] will produce=[tex]\frac{3}{2}\times 1.20=1.80moles[/tex] of [tex]H_2[/tex]
Thus 1.80 moles of [tex]H_2[/tex] will be produced 1.20 moles of aluminium.
are single replacement reactions reversible.
The Greek letter δ (delta) is used to signify _____.
a) an ion
b) a charged particle
c) a mixed number
d) a small fraction
e) none of the above
Answer:
b) a charged particle
Explanation:
Gatorade is an example of a homogenius or heterogenius mixture?
Answer: Homogeneous mixtures are mixtures that are completely mixed where you cannot see any separate parts. This would include stuff like Gatorade, water, coffee, and paint. Heterogeneous mixtures are mixtures that are uneven and you can see individual parts.Gatorade usually comes in one type of color, one type of flavor. Gatorade. Because it's made up of different components, it's actually a homogenous mixture or homogeneous mixture.Gatorade Thirst Quencher contains water, sucrose (table sugar), dextrose, citric acid, natural flavor, sodium chloride (table salt), sodium citrate, monopotassium phosphate, and flavoring/coloring ingredients. Some Gatorade flavor variations used to contain brominated vegetable oil as a stabilizer. Hope this helps have a nice day❤️
Explanation:
The movement of water both on and
above Earths surface
The movement of water on and above the earth's surface is called the hydrologic cycle, or the water cycle. Hope this helps!
3. What do you think is the primary reason why the Unionid mussel population declined whenever there is a dramatic increase in the Zebra mussel population?
When the Zebra arrived they ate all the food in the area leaving Unionid numbers to decline and die as they have no food to eat.
What are low tides caused by
Regarding water molecules, adhesion is best described as * the attraction water molecules have to other water molecules the attraction water molecules have to ionic substances the attraction water molecules have to polar substances the attraction water molecules have to other surfaces
Answer:
the attraction water molecules have to other surfaces
Explanation:
Adhesion is defined as the attractive forces between unlike substances, e.g water moving up a capillary tube.
Adhesion is the tendency of dissimilar particles or surfaces to cling to one another(Wikipedia).
So, what we mean by adhesion in this context, is the attraction water molecules to other surfaces.
What do you infere about using nonrenweable vs renewable resources and the effect this has on the cost of energy
Answer:
See explanation
Explanation:
Renewable energy resources refers to energy resources that can not be depleted such as wind, solar, biomass etc.
Non-renewable energy resources refers to those energy resources that can be depleted such as fossil fuels.
Globally, it has been established that energy from renewable sources costs less than energy from nonrenewable(especially fossil fuel) sources.
According to Forbes, 2019, "The worldwide weighted average cost of electricity from solar power concentration fell by 26%, that of bioenergy reduced by 14%, solar photovoltaics, geothermal, onshore, as well as offshore wind, fell by 14%, and hydropower by 12%.".
This shows us that renewable energy remains the cheapest alternative in terms of energy cost.
An object moves from one location to another that has a different gravitational pull. How would the object's mass be affected?
What is 24.3 – 15.45 when accounting for sig fig rules?
Answer:
8.85 because im smart
27. What element has this electron configuration: 1s2 2s22p6 352 3p6 452
3d10 4p4
Choices:
Sulfur
Selenium
Arsenic
Tellurium
Answer:
Selenium
Explanation:
One way to figure this out is to count the electrons and add them up.
2+2+6+2+6+2+10+4 = 34 electrons
A neutral atom has the same number of electrons and protons. Protons tell us the atomic number of an element. Element number 34 is Selenium.
Another way to figure it out is to look at just the highest "s" or "p" level of the electron configuration, and then see which element corresponds to that. This element has a 4s and a 4p, so I will look at 4p. The configuration is 4p4, so I will look at the 4th row of the periodic table (4p4) in the "p" block (4p4) and the 4th element in the "p" block (4p4). That's selenium :)
Ba(OH)₂ + 2 HBr --> BaBr₂ + 2 H₂O is this a double replacement reaction
Answer:
The answer is Yes
Explanation:
Barium Hydroxide + Hydrogen Bromide = Barium Bromide + Water =
Double Displacement
POV: You’ve been through many question and evening answering some of them.
Here’s your break time pass, Enjoy.
:D
How many grams are in
.093 liters of o2, gas at STP?
Answer:
0.13 grams of O2
Explanation:
Just did worksheet
NEED HELP ASAP GIVING 20 POINTS AND BRAINLIEST
Given 18.5 grams of CHA and 24.0 grams of Oz the following reaction occurs. Calculate the number of grams of
carbon dioxide that form from the reaction.
CH4 + 20 + CO2 + 2 H2O
Answer:
CO2 should be 50.88 g
Explanation:
CH4 + 2 O2 --> CO2 + 2 H2O
First, find the moles of CH4:
Molar Mass of CH4 (formular mass):
12+1*4=16 g/mol (actually just use the atomic mass in your periodic table to add them up)
Then we can find how many moles in CH4 = 18.5÷16=1.15625 mol
As we know 1 mole of methane(CH4) makes 1 mole of CO2, so if 1.15625 moles of methane is reacted, 1.15625 moles of CO2 will be made.
So the moles of CO2 is 1.15625 moles.
Calculate the mass of CO2:
Molecular mass: 12+16*2=44 g/mol
Mass=44*1.15625=50.88 g (cor. to 2 d.p.)
Which of the following is NOT an example of a chemical reaction?
A loaf of bread is sliced with a knife
A loaf of bread is baked in an oven
A loaf of bread is digested in the stomach
A loaf of bread molds in a pantry
Answer: D
Explanation:
because mold is a chemical reaction with with the air that's why the put a date cause the bread can only last for so long in till the chemical reaction.But D is is right because your body has to go though a chemical reaction in or to digest it and and break it down even more.So D would be the right answer cause that's where most of your chemical reaction happens when food is swallowed into the stoamch i hope i was able to explain it as much as i can
Hi! I'm going to give brainliest to the person who answers this first/best. It has the answer choices. Thanks!
Answer:
the answer is electron....
please hurry
You discover a substance that is made of 10.6 g of Carbon and 4.4 g of Hydrogen.
(Use this to calculate empirical formula.)
The molar (molecular mass) of the compound is 68.204 g/mol.
(Use this when solving for molecular formula.)
What is the percent composition of this substance? (Make sure you percent has two (2) decimal places.)
What is the empirical formula of your substance? (Do not worry about making the numbers subscript).
What is the molecular formula of your substance? (Do not worry about making the numbers subscript).
please explain your answers
Explanation:
Elements contained. C. H
% by mass. 10.6. 4.4
/ each by its a.m. 10.6/12.0. 4.4/1.0
amount. 0.88. 4.4
/ each by the smaller. 0.88/0.88. 4.4/0.88
ratio of amount. 1.00. 5.00
simplest whole number ratio= 1 : 5
The empirical formula=CH5