Answer:
1.Hydrogen: 1s1 2 - Helium: 1s2
45 – Rhodium: [Kr], 5s2, 4d7 46 – Palladium: [Kr], 5s2, 4d8
47 – Silver: [Kr], 5s2, 4d9 48 – Cadmium: [Kr], 5s2, 4d10
49 – Indium: [Kr], 5s2, 4d10, 5p1 50 – Tin: [Kr], 5s2, 4d10, 5p2
Thus 43 electrons, so the neutral atom has atomic number 43. Look at a periodic table and you see that this element is technetium.
Element Atomic Number Element Symbol Element Electron Configuration
45 Rh [Kr] 4d8 5s1
46 Pd [Kr] 4d10
47 Ag [Kr] 4d10 5s1
48 Cd [Kr] 4d10 5s2
helllloooook this makes no sense help me plz
may i ask?
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The heating system on the second floor is being fixed Dr Kline explained Please bring these extra blankets up there for the patience
Will calcium metal react with chromium (III) chloride? Explain your answer
Calcium metal with chromium(III) chloride would react. Calcium metal is more reactive than chromium metal; therefore, putting calcium metal in chromium chloride would create a reaction, where as putting chromium metal in calcium chloride would not form any reaction.
Calculate the mass of nitric acid required to make a 250mL solution with 2.40 ph
Please show steps, I am trying to learn!
The mass of nitric acid required to make the given solution is 0.0627 g.
The given parameters:
Volume of the acid, V = 250 mLpH of the acid, = 2.4The hydrogen ion (H⁺) concentration of the nitric acid is calculated as follows;
[tex]H^+ = 10^{-pH}\\\\H^+ = 10^{-2.4}\\\\H^+ = 0.00398[/tex]
The molarity of the nitric acid is calculated as follows;
[tex]= 0.00398 \ H^+ \times \frac{1 \ M \ HNO_3}{1 \ H^+} \\\\= 0.00398 \ M[/tex]
The number of moles of the nitric acid is calculated as follows;
[tex]moles = M\times L\\\\moles = 0.00398\ M \ \times \ \frac{250 \ mL}{1000} \\\\moles = 9.95 \times 10^{-4} \ mol.[/tex]
The molar mass of nitric acid is calculated as;
[tex]HNO_3 = (1) \ + (14) \ + (16 \times 3) = 63 \ g/mol[/tex]
The mass of the nitric acid contained in the calculated number of moles is calculated as;
[tex]mass = moles\ \times \ molar \ mass\\\\mass = 9.95\times 10^{-4} \ mol. \ \times \ 63 \ g/mol\\\\mass = 0.0627 \ g[/tex]
Thus, the mass of nitric acid required to make the given solution is 0.0627 g.
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State charles's law. If a balloon occupies 885 cm3 volume at 20°C and 794 cm3 at - 10°C , prove that this is according to charles's law.
find the distance between
the following points:
a) AC0₂0) and B(5, 2)
Al + FeCl2 → Fe + AlCl3.
Answer:
Hope this helps :)AlCl3 + Fe = Al + FeCl2
Chemical Equation Details aluminum chloride + iron = aluminum + iron(ii) chloride
[tex]\text{Balanced reaction:}\\\\2\text{Al} + 3\text{FeCl}_2 \longrightarrow 3\text{Fe} + 2\text{AlCl}_3[/tex]
Write out a correctly formatted hypothesis that describes how the amount of hydrogen gas produced with be affected by the concentration of acid.
To solve such this we must know the concept of acid and base reaction. Therefore, the concentration of acid decides the concentration of hydrogen gas evolved.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
When creating mixture the amount of hydrogen gas is directly related to the concentration of the acid mixture, the higher the concentration level The more hydrogen gas would be produced.
Therefore, the concentration of acid decides the concentration of hydrogen gas evolved.
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How many molecules are present in 2.00 mol of KCl?
Answer:
The question specified 2 moles of potassium chloride. Clearly, there are 2 moles of chloride ions. How many moles of chloride ions in 95.2 g
Which materials are used to make concrete select all that apply
Answer:
cement air water sand and gravel
Explanation:
Answer:
Explanation:
The principal ingredients that make up the concrete mix are: cement, fine aggregate, coarse aggregate, water, chemical admixtures, and mineral admixtures.
In a chemical change energy can be ___?
A. Created but not destroyed
B. Either created or destroyed
C. Destroyed but not created
D. Neither created nor destroyed
Answer:
chemical change energy can neither be created nor destroyed.
Explanation:
the rule of law of conversion states that energy can only be converted from said energy to another. it cannot be created and destroyed.
Answer:
D. Neither created nor destroyed
Explanation:
The law of conservation of energy states that energy is neither created nor destroyed.
The overall shape of a plant cell is most directly related to which of its parts?
Answer: Cell wall
Explanation: Cell wall is a unique structure found only in some specific organisms like plants, bacteria, fungi etc. The cell wall in plants is predominantly made up of a polysaccharide called CELLULOSE. This carbohydrate confers upon the cell "rigidity".
The cell wall is an additive material including the cell membrane that coats the external part of the cell of plants, hence, it gives plant cells their characteristic shape. The cell wall contributes to the overall flexible but rigid shape of the plant cell, protecting the cell against physical or chemical stresses.
What do these red/yellow/orange-precipitate reactions have in common? (choose
the best answer)
They all made the same color.
They all have a barium (Ba+2) cation.
They all have a chromate (CrO4-2) ion.
They all have a chloride ( C1-1) ion.
Answer:
3 is the correct I think so
Answer:
They all have a chromate (CrO4-2) ion.
Explanation:
explain the electrolysis of MgCl2 in aqueous solution
During electrolysis, a current is passed through the molten MgCl2, and when this happens, the Mg2+ ions move to the negative electrode where they PICK UP OR GAIN ELECTRONS. This is reduction. The Cl- ions move to the positive electrode where they LOSE ELECTRONS. This is oxidation.
Desperate Please Hurry
What was the evidence that Earth was round before there were photos from space?
Answer:
Explanation:
Are there any awnser choices?
Help
what is isotopes
I NEED HELP!!!! URGENTLY!!!! I HAVE TO GET THIS DONE THIS WEEK!!!! WILL GIVE BRAINLIEST!!!!
1. You learned that waves in the ocean, sound waves, and light waves all have certain things in common. They all carry energy. The velocity, frequency, and wavelength of each is connected by the same equation. Which type of wave would you most want to learn more about? Why does it interest you? What would you want to find out about it? Write your answers in 2-3 paragraphs. (10 points) Would you like to know more about how waves in the ocean move, how sound travels, or how light works?
2. If you could somehow travel inside an atom and look around, what part of the atom would you want to look at? Why? What would you want to understand better as a result of your "travels"? Write your answers in 2-3 paragraphs. (10 points) Do electrons or the nucleus interest you more? What questions do you still have about how an atom works?
Answer:
Explanation:
1) I personally would want to learn more about how the waves in the ocean move. About what causes high tide. What causes low tide. Why some waves are big and some small.
I know it has something to do with the gravitational pull of the moon. But that is as far as my knowledge extends on the subject. I have always been fascinated with the secrets of the ocean and the secrets of space. To me learning, this is a little of both.
2) The nature of the interaction between neutrons and protons in the atomic nucleus, which binds the nucleons together, is the biggest wonder in the inside of the atom that I would like to really know. Protons have a positive charge, but neutrons do not. What form of interaction between a charged particle and an uncharged particle is possible? That is what I expect to learn more about as a result of my explorations into the inner workings of the atom.
The inside of the atom is made up of the nucleus and electrons that travel about in orbits. The nucleus is made up of protons and neutrons. Electrons have a negative charge, protons have a positive charge, and neutrons have none. The nucleus is held together by electrostatic interaction between electrons and protons. The majority of the mass of an atom is made up of protons and neutrons.
I'm interested in finding out more about ocean waves travel. regarding the reason for high tide. what brings on a low tide. Although some waves become also large while others are smaller.
What are ocean waves?Ocean waves seem to be alterations to the ocean's surface. They could be produced by water being moved by the wind, gravity, as well as other forces.
What are waves?A disturbance that moves from one place to another across a medium has been referred to as a wave. As an illustration of a wave, think of a sinuous wave.
Personally, I'm interested in finding out more about ocean waves travel. regarding the reason for high tide. what brings on a low tide. Although some waves become also large while others are smaller I'm certain that the moon's gravitational force is somehow implicated. Because that is basically the extent of my expertise on the matter. The mysteries of the water and the mysteries of space have always interested me. I'm still learning, so this combines a bit of both.The largest enigma in the interior of the atom something I would really like to understand is the nature of the connection involving neutrons as well as protons in the nucleus of an atom, which holds the nucleons together. Neutrons just don't have a positive electrical charge, whereas protons do. What kind of interactions is conceivable between charged as well as uncharged particles. Through my investigations into the internal workings of the atom, I hope to understand more about it.
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How can I increase the time over which the collision occurs?
Explanation:
The laws of physics determine that the force of impact increases with the square of the increase in speed. So, if you double the speed of a car, you increase its force of impact four times. If you triple the speed, the impact is nine times as great.Observe that the greater the time over which the collision occurs, the smaller the force acting upon the object. Thus, to minimize the effect of the force on an object involved in a collision, the time must be increased.
What is pseudoscience and how is it different from science
Answer:
a difference in attitude
Explanation:
It's just not science. ... The big difference Popper identifies between science and pseudo-science is a difference in attitude. While a pseudo-science is set up to look for evidence that supports its claims, Popper says, a science is set up to challenge its claims and look for evidence that might prove it false.
All three types of rock form in which earth layer?
Answer:
Lithosphere
Explanation:
All three types of rock make up the Earth's lithosphere, the outermost layer. The lithosphere averages about 100 kilometers in thickness.
Please help ASAP!
How does an animal use sugar as a source of energy?
Plants and animals use glucose as a soluble, easily distributed form of chemical energy which can be 'burnt' in the cytoplasm and mitochondria to release carbon dioxide, water and energy. Pure monosaccharides, such as glucose, attract water.
An animal's body breaks down carbohydrates and converts them into simple sugar such as glucose. Glucose in the form of energy is carried through the blood and delivered to every cell of the body.
What is the function of sugar in animals?Carbohydrates are an important compound of all life on this planet. Both plants and animals utilize carbohydrates as a source of energy to keep their body functioning at the most basic level.
Carbohydrates fulfill needs by helping in the synthesizing of other chemicals and giving structure to cells within the body. Carbohydrates are carrying out normal functions such as growth, movement, and metabolism.
Carbohydrates store energy in the form of starch and provide either simple or complex sugars. Polysaccharides, give a steady supply of energy while sugars, monosaccharides, and disaccharides, supply quick energy on dissolving.
Carbohydrates have the side effect of helping with the processing of other body's chemicals. As carbohydrates break down, they release energy.
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A sealed flask initially contains pure nitrogen dioxide gas (NO,). Over time, the nitrogen dioxide forms dinitrogen tetroxide gas (N,O.). The graph below shows the relative amounts of (NO,) and (N20.) over time. What is true about the time indicated by the blue arrow?
This problem is providing information about the equilibrium reaction whereby nitrogen dioxide gas produced dinitrogen tetroxide gas as shown on the attached picture and the following chemical equation:
NO₂ (g) ⇄ N₂O₄ (g)
In such a way, we can consider the given choices to reason the following: the blue arrow is pointing out the arrival to the equilibrium condition for the reaction, a point in which the rate of the forward reaction (formation of N₂O₄) is equal to the rate of the reverse reaction (formation of NO₂), because the molecules will fluctuate to the same relative amounts defined by the equilibrium constant.
Therefore the answer will be the first one on the attached file, which can vary on your online homework format.
It is important to note that the reactant is not used up at any point of the graph (concentration drops to 0) and also, the activation energy cannot be analyzed with this sparse information.
Learn more:
(equilibrium concentrations) https://brainly.com/question/7949757what is the heaviest element on the periodic table
Answer:
uranium
Explanation:
The heaviest naturally stable element is uranium, but over the years physicists have used accelerators to synthesize larger, heavier elements. In 2006, physicists in the United States and Russia created element 118.
Answer:
Uranium
Explanation:
Naturally its uranium, however scientists are artificially making bigger ones (which aren't on the periodic table).
Hope this helps!
How do mixtures form?
Answer:
A mixture is created when two or more different substances are physically combined and can be separated back into its original substances. A chemical reaction occurs when two or more substances are combined to form a new substance and cannot be separated back into its original substances.
Explanation:
Answer:
A mixture is created when two or more different substances are physically combined and can be separated back into its original substances.
Explanation:
Hope it helps
which tool would be best for measuring centimeters
A. Metric ruler
B. Balance scale
C. Meter scale
D. Measuring tape
Answer:
the answer is d
Explanation:
URGENT PLEASE HELP
What most likely happens when a sodium atom comes near an atom having seven valence electrons?
Answer:
7 Electrons
Explanation:
What it is fill its valence shell, it would need to acquire 7 electrons - a difficult task for a metal like sodium that is a known electron-loser. So unlike fluorine and oxygen, sodium acquires a full octet by losing electrons and emptying out its outermost shell.
Do the ingredients changing into a cake in the oven a chemical reaction?
Answer:
When you bake a cake, the ingredients go through a chemical change. A chemical change occurs when the molecules that compose two or more substances are rearranged to form a new substance! When you start baking, you have a mixture of ingredients. The flour, egg, sugar,
Explanation:
How long does it take an object to travel 50m at a rate of 8 m/s?
Answer:
6.25s
Explanation:
time = distance / speed
time = 50 / 8
time = 6.25s
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35 Wd be able to be one to our body and remove carbon diote on our biker
45 Wd be able to gicky react to save ourselves from daneous stations
3 Wed he wable to crostate and deliver orygen ad carbon dioxide throughout our body
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math! The concentration of a water and
alcohol solution is 25 percent alcohol by
volume. Calculate what the volume of alcohol
would be in 200 mL of the solution.
Answer:
50ml
Explanation:
The formula says that 25 percent of the solution is alcohol, so 200 x 0.25 equals to 50, or 50ml.
Difference between Laboratory Thermometer and Clinical Thermometer.
Explanation:
Can you please mark me the brillantest?