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Related Questions
7. Calculate the net charge of the following atoms.
Atom A: has 6 protons and 4 electrons
Atom B: has 9 protons and 9 electrons
Atom C: has 10 protons and 14 electrons
Atom D: has 33 protons and 29 electrons
Answers
Answer:
any atom that contains six protons is the element carbon and has the atomic number 6, regardless of how many neutrons or electrons it may have.
Explanation:
Answer:
Atom A: +2 Atom B: 0 Atom C: -4 Atom D: +4
Explanation:
We know that protons have a positive charge and electrons have a negative charge. Therefore, we will treat the electrons as a negative number. The net charge is the sum of electrons and protons.
Atom A = 6 + (-4)
because electrons as negative.
Net charge = +2
Atom B = 9 + (-9)
Net charge = 0, or neutral
Atom C = 10 + (-14)
Net charge = -4
Atom D = 33 + (-29)
Net charge = +4
Someone pls help me I will make you brain
Answers
Answer: It has to be stratosphere because This region of the atmosphere is called the stratosphere. It is present in stratosphere According to NASA earth have 6 atmospheric layers..the layer just above the earth is troposphere and above this layer is the stratosphere.
Explanation:
this is the new one I will mark brainlist NO LINKS OR I WILL REPORT YOU
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Answer:
ok what is new. ........,,,,,
name the gas produced when nitric acid is added to copper metal
Answers
Answer:
Nitrogen dioxide gas
Explanation:
Question 10 of 10
What is the name for the units of information in chromosomes?
A. Traits
B. Genes
C. Heredity
D. DNA
Please hurry
Answers
Answer:
genes
Explanation:
I passed the exam jUST trust me
Answer:
The answer is B: Genes
Explanation:
Genes is the units of information
10. A balloon is blown up to a volume of 18 L at a pressure of 1.0 atm and
298 K. What would the pressure inside the balloon be when its volume
becomes 4.0 L and its temperature is 239 K?*
Answers
Answer:
3.6 atm
Explanation:
10. A balloon is blown up to a volume of 18 L at a pressure of 1.0 atm and
298 K. What would the pressure inside the balloon be when its volume
becomes 4.0 L and its temperature is 239 K?*
PV/T = P'V'/T'
(18 X 1)/298 =(P' X 4)/239
so
P' = (18 X 239)/(298 X 4)= 3.6 atm
P'=(18 X 239)/(298 x 4) =
You are given an unknown solution, which contains both aqueous barium ion, Ba2+ (aq), and aqueous lead(II) ion,
Pb²+ (aq). Which of your six solutions would allow separation of the ions?
Select all that apply.
A. Ammonium chloride, NH4Cl(aq)
B. Iron(II) nitrate, Fe(NO₂)(aq)
C. Nickel(1) chloride, NiCl(aq)
D. Silver nitrate, AgNO₂(aq)
E. Sodium hydroxide, NaOH(aq)
F. Sulfuric acid, H₂SO,(aq)
Answers
Given the six solutions, the solution that will separate aqueous barium ion and aqueous lead(II) ion is ammonium chloride.
In qualitative analysis, it is common to separate substances in solution by introducing a solution that preferentially precipitates one of the ions in solutions while leaving the other one in solution.
In this case, we know that all chlorides are soluble except those of lead, mercury and silver according to the solubility rules. Hence, if ammonium chloride is added to a solution of aqueous barium ion and aqueous lead(II) ion, lead II chloride is preferentially precipitated hence the ions are separated.
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The region around a nucleus in which electrons are likely to be found is called the
(1 point)
O pudding
O empty space
O atomic orbital
atomic orbit
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Please answer with the correct answer <3
Substances can be categorized in two ways, as an (element, mixture or compound) or as a (solid,liquid or gas). Which of these methods are of most use to a chemist?
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As a chemist, the classification of substances as elements, mixtures, or compounds is of more importance than the state of the substances.
Classification of substancesThe state of substances is mostly obvious to the eyes, even to those that are not chemists. In other words, the state of matter of substances is just a physical property that can be easily discerned.
Whether a substance is an element, mixture, or compound, however, is something that may not be discerned physically without carrying out some chemical analyses.
Thus, a chemist would be more interested in the classification of substances as elements, compounds, or mixtures.
More on classification of substances can be found here; https://brainly.com/question/11446627
Write the law of conservation of matter…
(Please Answer fast)
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Answer:
The Law of Conservation of Matter states that matter cannot be created or destroyed. In a physical change, substances can change form, but the total mass remains the same. In a chemical change, the total mass of the reactants always equals the total mass of the products. Materials.
An effective treatment for some cancerous tumors involves irradiation with fast neutrons.
The neutrons from one treatment source have an average velocity of 5.7 x 10 m/s. If the velocities of individual neutrons are known to within 2% of this value, what is the
uncertainty in the position of one of them?
__m
Answers
Here is your answer look at your image below
What is a compound?
a combination of two or more substances that are not chemically combined
a combination of two or more elements that are combined in a certain ratio
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Answer:
a combination of two or more elements that are combined in a certain ratio
Explanation:
A chemical compound is a chemical substance composed of many identical molecules composed of atoms from more than one element held together by chemical bonds. A molecule consisting of atoms of only one element is therefore not a compound.
What is the formula for the ionic compound formed when potassium bonds with oxygen?
Answers
Answer:
A metal oxide with formula K2O. Potassium oxide (K2O) is an ionic compound of potassium and oxygen. It is a base. This pale yellow solid is the simplest oxide of potassium.
calculate the volume of a box with the following dimensions: length=8 cm
width = 6cm and height = 5 cm
Answers
Answer: 240 cm³
Explanation:
Volume of the box = l × w × h
= (8 cm × 6 cm × 5 cm)
= 240 cm³
1.The chemical or substance used to start a reaction are called
Answers
Answer:
Reactants
Explanation:
The substance (or substances) initially involved in a chemical reaction are called reactants or reagents.
Answer:
The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. ... Chemical reactions are described with chemical equations, which symbolically present the starting materials, end products, and sometimes intermediate products and reaction conditions.
Explanation:
Hope this helps...
What are the relationships among a hydrogen atom's energy levels, sublevels, and atomic
orbitals?
Answers
The relationship between an hydrogen atom's energy levels, sublevels and atomic orbitals lies in the fact that hydrogen atom has a shell with energy level of 1 and the energy sublevels are similar as there's only one and have the same energy, and lastly, only one atomic orbital exists in a hydrogen atom
Generally, an atoms energy level, sublevels and atomic orbitals are described by the four quantum numbers if it's Valence electrons.Among laws of atomic theory is the fact that no two electrons can have the same value for all four quantum numbers in an atom.Ultimately, the hydrogen atom has only one electron In the energy level 1, sublevels with equal energy as there are no sublevels in the energy level 1 and only the 1s atomic orbital.
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Choose the best
1. Aliquid is a form of matter that:
a flows,
b. is easily compressed.
c. has no definite volume.
d. has a definite shape.
Answers
Answer:
d. has a definite shape.
Explanation:
Who discovered the proton?
Crookes
Rutherford
Balten
Chadwick
Answers
Answer:
Sir James Chadwick discovered proton
Explanation:
Sir James Chadwick, was a British physicist who was awarded the 1935 Nobel Prize in Physics for his discovery of the neutron in 1932. In 1941, he wrote the final draft of the MAUD Report, which inspired the U.S. government to begin serious atomic bomb research efforts.
what are the units for the rate constant of a first-order reaction?
Answers
Explanation:
the units for the rate constant of a first-order reaction is :
[tex] = {s}^{ - 1} [/tex]
NEED ANSWER ASAP
Concerning chromatography, why do different colors in the ink separate?
A)Some colors had a greater repulsion for the paper or water. The colors that had a greater repulsion for the paper moved faster, and those with a greater repulsion for the water moved slowly up the paper.
B)Some colors had a greater affinity for the paper or water. The colors that had a greater affinity for the water moved faster, and those with a greater affinity for the paper moved slowly up the paper.
C)Some colors had a greater repulsion for the paper or water. The colors that had a greater repulsion for the water moved faster, and those with a greater repulsion for the paper moved slowly up the paper.
D)Some colors had a greater repulsion for the paper or air. The colors that had a greater affinity for the air moved faster, and those with a greater affinity for the paper moved slowly up the paper.
E)Some colors had a greater affinity for the paper or water. The colors that had a greater affinity for the paper moved faster, and those with a greater affinity for the water moved slowly.
Answers
Substances that have greater affinity for the solvent travel faster while the substance that have greater affinity for the paper travel more slowly.
Chromatography involves a mobile phase and a stationary phase. The mobile phase is the solvent that carries the mixture. while the stationary phase is the medium that performs the actual separation
The speed with which components of the ink moves up the paper depends on its affinity for the paper or the water.
The different colors in the ink separate because some colors had a greater affinity for the paper or water. The colors that had a greater affinity for the water moved faster, and those with a greater affinity for the paper moved slowly up the paper.
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5. Which of the following statements illustrates osmosis?
Answers
Answer:
there is no following so sorry
Which factor of production would tools fall under?
A) Land
B) Labor
C) capital
D) entrepreneurship
Answers
Answer:
Capital (20 characteristics nanaman bago masend sagot)
Answer:
C) capital
Explanation:
An atom has 21 protons, 24 neutrons, and 18 electrons. Which change will cause the atom to have more negatively charged particles than positively charged particles?
losing two protons
losing four neutrons
gaining three electrons
gaining four electrons
Answers
Answer:
ganar tres electrones
Explanation:
Answer:
gaining three electrons
what is the second most abundant gas in the atmosphere
Answers
If you have 10 tasks complete to finish a project‚ how many days will you need to spend working on this course if you spend five days on each task?
A.p.e.x l.e.a.r.n.i.n.g reading skills and strategies
Answers
Answer:
Well 50 of course
Explanation:
5 days per tasks is like saying 10 times 5 which is 50.
what is the purpose of the dts other auths and pre audits screen?
Answers
Answer:
It allows the traveler to justify questionable expense items.
hope that helped <3
What does this picture represent?
А. 0
Hot Plate
B.
Graduated cylinder
С.
Goggles
D.
Electronic Balance
Answers
the answer is d electronic balance
The human body is about 9.5% carbon atoms, with a small fraction of that carbon being radioactive carbon-14. Carbon dating is a method of determining the age of things made of once living materials. What information would be needed to find the age of a human fossil or the Dead Sea Scrolls?
Answers
Answer:The age can be determined by utilizing carbon-14, a radioactive isotope of carbon.
Explanation:
You will mostly find me in solid form at room temperature.
a
Metal
b
Nonmetal
Answers
which factor increases as the efficiency of a machine increases
Answers
Answer:
Because all machines lose input work to friction, one way to improve the efficiency of a machine is by reducing friction. Oil is used to reduce friction between the moving parts of car engines. The use of oil makes engines more efficient. Another machine that loses input work is a bicycle.
Explanation:
Hope this helps.
The factor which increases as the efficiency of a machine increases is: work output.
Efficiency can be defined as a ratio of work (energy) output to work (energy) input.
Mathematically, the efficiency of a machine is given by the formula:
[tex]Efficiency = \frac{W_O}{W_I} \times 100[/tex]
Where:
Wo is the work output.Wi is the work input.Work can be defined as the amount of energy required to move an object from one point to another.
Hence, the work done by a machine is the product of the perpendicular force acting on the machine and the distance it covers or travels.
Ideally, the work output of a machine is highly dependent on its efficiency and as such, it is a factor which increases as the efficiency of a machine increases
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