Answer:
i belive the answer you are looking for is A.. hope this helps!
Explanation:
im not really 100% certain of this answer due to the fact i am a little rusty.
what soda was the first to use the two-liter bottle?
Answer:
Coca-Cola or Pepsi
Explanation:
Im sure one of those
Carbon-14 emits beta radiation and decays with a half life of 5730 years. Assume you start with 2.5x10^15 grams of Carbon-14, how many grams remain at
the end of 5 half lives?
A. 1.1x10^-10 g
B. 2.5x10^-10 g
C 1.3x10^-10 g
D. 5.0x10^-10 g
The amount remaining at the end of 5 half-lives is 7.81×10¹³ g
From the question given above, the following data were obtained:
Half-life (t½) = 5730 yearsOriginal amount (N₀) = 2.5×10¹⁵ gNumber of half-lives (n) = 5Amount remaining (N) =?The amount remaining can be obtained as follow:
N = 1/2ⁿ × N₀
N = 1/2⁵ × 2.5×10¹⁵
N = 1/32 × 2.5×10¹⁵
N = 0.03125 × 2.5×10¹⁵
N = 7.81×10¹³ g
Therefore, the amount remaining after 5 half-lives is 7.81×10¹³ g
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13. A natural flow of groundwater that has
reached the surface is a(n)
a. spring.
c. aquifer.
b. well.
d. travertine.
A natural flow of ground water that has reached surface level is call a spring.
Water moves underground downward and sideways, in great quantities, due to gravity and pressure.
A spring is the result of an aquifer being filled to the point that the water overflows onto the land surface. They come in different sizes, from intermittent seeps, which flow only after much rain, to huge pools flowing hundreds of millions of gallons daily.
Learn more:
https://brainly.com/question/2375655
how much evaporated milk equals 1 cup of whole milk?
Answer:
1/2 cup evaporated milk plus 1/2 cup water.
Explanation:
Which model of the atom is thought to be true?
A. Protons, electrons, and neutrons are evenly distributed throughout the volume of the atom.
B. The nucleus is made of protons, electrons, and neutrons.
C. Electrons are distributed around the nucleus and occupy almost all the volume of the atom.
D. The nucleus is made of electrons and protons.
Its A. Explanation:I just know
Which of the liquids will sink in milk?
Answer:
mercury 13.6 has a great density than milk
Which example accurately describes a solution?
Typical examples of solutions are
Alcoholic beverage (ethanol in water)GasolineWhat is a solution?A solution can be defined as a mixture (homogeneous) of two or more substances typically a solute in a solvent, the solvent is usually in greater quantity and the substance or substances present in lesser amounts are the solutes.
Other good examples of a solutionCommon examples of solutions are sugar in water and salt in water solutions, soda water,
Furthermore, solutions can be homogenous or heterogenous
Learn more about solutions here:
https://brainly.com/question/2626617
Helpppppppp plzzzzzz asaaaapppp
Answer:
Alright, the first thing we have to do is to balance the chemical equation
2Na3N -----> 6Na + 1N2
We have 60g of Na3N, we convert them into moles by dividing the mass of the compound by the molar mass.
Molar mass of Na3N = (22.98 x 3) + (14) = 82.94g/mol
60 = 0.72341451651 moles of Na3N
82.94
Now because we did the balanced equation, we know the mole to mole ratio of Na3N to N2 would be 2:1, so in order to get the moles of N2 you have to divide the moles of Na3N by 2
0.72341451651 moles/2 = 0.361707258 moles of N2
Now that we have the moles of N2, we just have to determine the mass of it in grams. In order to do that, just multiply the moles by the molar mass of N2 (28g/mol)
0.361707258 x 28 = 10.13g of N2
Therefore the decomposition of 60g of Na3N would result in 10.13g of N2 (nitrogen gas)
how many grams of baf2 are dissolved in 75.0 ml of a saturated solution of baf2? ksp = 1.00 x 10-6
Using the solubility product of the saturated solution, the mass of BaF2 dissolved is 0.083 g.
The equation of the reaction is obtained from;
BaF2(s) ⇄ Ba^+(aq) + F^-(aq)
The concentration of the substance can be obtained from the Ksp as follows;
Ksp = [Ba^2+] [2F^-]^2
Ksp = 4x^3
x = ∛Ksp/4
x = ∛ 1.00 x 10-6/4
x = 6.3 x 10^-3 M
Given that;
mass/molar mass = concentration x volume
molar mass = 175 g/mol
concentration = 6.3 x 10^-3 M
volume = 75.0 ml or 0.075 L
Mass = ?
Mass = concentration x volume x molar mass
Mass = 6.3 x 10^-3 M x 0.075 L x 175 g/mol
Mass = 0.083 g
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Two gas jars are connected to each other, but they are separated by a closed valve. One gas jar contains oxygen, and the other contains hydrogen. What will happen when the valve is opened?
Answer Choices:
A. Oxygen and hydrogen molecules will mix because of random movement of their molecules.
B. Oxygen and hydrogen molecules will remain in separate jars because of different partial pressures.
C. Oxygen and hydrogen molecules will remain in separate jars because of different rates of expansion.
D. Oxygen and hydrogen molecules will mix because the molecules have a much lower volume than the volume of the jars.
When the valve is opened, oxygen and hydrogen molecules will mix because of random movement of their molecules.
What is diffusion?
Diffusion involves the movement of gas molecules from one region where they are in higher concentration to another region where they are in lower concentration.
When the valve is opened, oxygen and hydrogen molecules will mix because of random movement of their molecules.
Learn more about diffusion: https://brainly.com/question/576417
Answer:
Oxygen and hydrogen molecules will mix because of random movement of their molecules.
Explanation:
I need help!!!!!!!!!!!!!!!
Answer:
I think the answer is A.
Explanation:
hope this helps.
Can someone help?
Name the compound:
CH=benzene
Why?
benzene is represented by the empirical formula CH, which indicates that a typical sample of the compound contains one atom of carbon (C) to one atom of hydrogen (H).
----(Is this what you meant???)
name any two chemical required for preparation of ammonia gas
Answer:
Ammonium chloride and slacked lime
Explanation:
We can generate ammonia gas in the research centre by slowly heating ammonium chloride (NH4Cl) and slaked lime [Ca(OH)2]. Ammonia gas is lighter than air, requiring its accumulation by the descending displacement of air.
What are the molecular formulae of the following compounds ?
Hydrochloric acid, sulphuric acid, sodium chloride, glucose, methane.
Let's see
[tex]\\ \sf\longmapsto Hydrochloric\:acid=HCL[/tex]
[tex]\\ \sf\longmapsto Sulphuric\:acid=H_2SO_4[/tex]
[tex]\\ \sf\longmapsto Sodium\: Chloride=NaCl[/tex]
[tex]\\ \sf\longmapsto Glucose=C_6H_12O_6[/tex]
[tex]\\ \sf\longmapsto Methane=CH_4[/tex]
.
Answer:
the molecular formulae of the following compounds are:
Hydrochloric acid: HCl
Sulphuric acid:[tex]H_2SO_4[/tex]
sodium chloride: NaCl
glucose:[tex]C_6H_{12}O_6[/tex]
methane:[tex]CH_4[/tex]
Explanation:
HELP ME PLZZZ
SMNSNSNS
D
D
D
D
D
D
D
D
D
D
Answer:
#1 is C, #2 is D, #3 is A
Explanation:
what happens when carbon dioxide gas is cooled to -78 degree Celsius
Answer:
It will be solid
Explanation:
-78 C° is the freezing point of carbon dioxide, so at the temperature of -78 Celsius, the particles of carbon dioxide will come closer together and have about a fixed position to vibrate. The carbon dioxide will turn into solid. The solid form of carbon dioxide is also called dry ice.
Which shows the weight of an atom?
atomic mass
atomic number
chemical symbol
none of the above
Answer:
The atomic mass
Explanation:
Answer: atomic mass
how to tell if something is a strong or weak acid or base
Answer:
It basically depends upon the pH value of that acid or Base. That's how you can determine whether the substance is a strong or weak acid/base. We have a pH scale ranging from 1 to 14, where 7 is the neutral point. Any substance having a pH of 7 means it is neither an acid nor a Base, but neutral in nature, such as water([tex]H_{2}O[/tex]). Now, if the pH is less than 7, the substance is an acid, similarly if the pH is more than 7, it is a base. As the pH DECREASES, the substance becomes more acidic, on the other hand as the pH INCREASES, the substance becomes more basic. This way you can compare between pH values of two substances and tell which one is stronger or weaker.
For Acids:
If a substance's pH is between 1 and 7 it is an acid. If it is more towards 1, it's a strong acid and if it's more towards 7 it is a weak acid.
For Bases:
If a substance's pH is between 7 and 14 it is a base. If it is more towards 14, it's a strong base and if it's more towards 7 it is a weak base.
Hope that helps...
a scientist finds an organism that has a single cell without a nucleus.This organism was found in pond water.In which KINGDOM douse it belong?if you can explain
Archaea (Archaeon ): Single-celled microorganisms without nuclei and with membranes different from all other organisms. Once thought to be bacteria.
Unicellular organism
-A unicellular organism, also known as a single-celled organism, is an organism that consists of a single cell, unlike a multicellular organism that consists of multiple cells. Unicellular organisms fall into two general categories: prokaryotic organisms and eukaryotic organisms.
the mass number of an element whose atoms contain 18 protons, 22 neutrons and 18 electrons
Answer:
Argon has the chemical formula Ar. Argon has 18 protons and 22 neutrons in its nucleus giving it an Atomic Number of 18 and an atomic mass of 40. Argon is a Noble Gas. Argon is a gas at room temperature.
Explanation:
How does an introduced species affect an ecosystem? Give 2 examples of positive ways
and 2 examples of negative ways.
Answer:
1+ it can help create balance among the ecosystem, particularly by controlling invasive species
2+ can help restore native ecosystems on degraded land
1- can become an invasive species
2- can cause an imbalance among native species
Explanation:
Which objects refract light? (Select all that apply.)
the human eye
contact lenses
a magnifying glass
concave mirrors
Why do some atoms form chemical bonds while others do not?
Answer:
Atoms of these elements have full outer electron shells. These atoms are stable and very rarely form bonds with other atoms. If the electronegativity values between two atoms are comparable, they may still form chemical bonds to increase the stability of their valence electron shell
Explanation:
what do solid and gas-particle have in common? (not liquid )
Answer:
Solid, liquid, and gas are common states of matter. Because each particle is attached to several others, individual particles cannot move from one location to another, and the solid is rigid. A has a fixed volume but does not have a fixed shape. Liquids take on the shape of the container they are in.
Explanation:
sorry, this is what i think
Which substances will make a salt when combined?
Vinegar and tea
Soda and wine
Soda and ammonia
Fertilizer and detergent
Answer:
Soda and wine is the answer to your question.
Explanation:
yo make salt you need a base and an acid. in this case the base is soda and the wine is acid. hope that helps :)
how does one determine a molecular formula from the epirical formula
Answer:
C
Explanation:
what is the equilibrium concentration of co at 1000 k?
Answer: For the reaction, K c = 255 at 1000 K. If a reaction mixture initially contains a CO concentration of 0.1550 M and a Cl 2 concentration of 0.171 M at 1000 K. 1.
Explanation:
question: the diagram below shows the major parts of the digestive system.
what part of the digestive system is labeled by the number 1?
A.
small intestine
B.
esophagus
C.
stomach
D.
mouth
Answer:
I got it Right in Study Island
Explanation:
Which of these is found in the energy levels of an atom?
Answer:
Electrons
Explanation:
Because the nucleas is In the middle and the Electrons surround it
Find the percent composition of OXYGEN in Manganese (III) nitrate, Mn(NO3)3.
Answer:
59.8%
Explanation:
First find the Mr of manganese (III) nitrate.
Mr of Mn(NO₃)₃ = 54.9 + (14 × 3) + (16 × 3 × 3) = 240.9
Since we have to find the percentage composition of oxygen, we need to find the Mr of oxygen in the compound, which is:
Mr of (O₃)₃ = (16 × 3) × 3 = 144
Now we can find percentage composition / percentage by mass of oxygen.
% composition = [tex]\frac{Mr\ of\ oxygen\ in\ compound}{Mr\ of\ compound}[/tex] × 100
% composition = [tex]\frac{144}{240.9}[/tex] × 100 = 59.776%
∴ % compostion of oxygen in maganese(III)nitrate is 59.8% (to 3 significant figures).