Answer:
²³⁵₉₂U
Explanation:
The nuclear symbol of the nuclei is ²³⁵₉₂U.
The uranium nuclei has;
mass number = 235
atomic number = 92
To write the structure of the atom;
The subscript before the symbol of the atom is the atomic number
The superscript is the mass number
So;
²³⁵₉₂U is the symbol of the nuclei.
What are the characteristics of Venus
Answer:
Venus is very hot because of the clouds that surround it. It is roughly the same size as Earth, it is just a little smaller. Venus is a rocky planet and has a lot of volcanoes.
That's all I know, you might have to research it. :/
What best describes how the testing of the initial version and the testing of the beta version fit into the four stages of the process of technological design
Answer:
C. The initial version is tested during the third stage to determine what needs to be improved, and the beta version is tested during the fourth stage to ensure that criteria are met.
Explanation:
Edge 2021
The Testing of the initial version is carried out in the third stage to determine what needs to be improved, while the testing of the beta version is carried out during the fourth stage to ensure that all necessary criteria are met.
The process of technological design involves several distinctive processes which can be broken down into four stages.
The four stages involved in the process of technological design are :
Identify a need : during this process the engineer identifies a problem that needs to be resolved design a solution : an initial design is created to provide a solution to the problem identified in stage 1Implement the solution : The design is tested and implemented if successfulevaluate the solution : In this stage the result from the solution ( beta version ) is subjected to ensure that all criteria are methence the testing of the initial version is to determine what needs improvement while the testing of the beta version is to ensure all criteria are met
learn more here: https://brainly.com/question/23367920
Which of the elements below will form an anion?
B (Boron)
CI (Chlorine)
Ca (Calcium)
Fe (Iron)
Answer:
Which of the elements below will form an anion?
CI (Chlorine)
Explanation: Chlorine generally behaves as an anion having an oxidation state -1
A farmer has a bucket of fertilizer that will help her plants grow. She
followed instructions on the fertilizer bucket, which say to change the phase from a
liquid to a solid before adding it to the plants. What happened to the molecules of
fertilizer when it changed phase?
Explanation:
The molecules of the fertilizer after the phase change are more reactive compared to when in solid phase.
These molecules in liquid are more free to move about and not fixed as in a solid. This causes the liquid fertilizer to react faster compared to the solid. The solid molecules are in a fixed shape. In the liquids, they slide on top of one another and are free to move better.Si un elemento químico tiene un numero atomico z=12, y es un atomo neutro (igual cantidad de electrones y protones), ¿Cual es la configuracion electronica esperada?
Answer:
1s² 2s² 2p⁶ 3s²
Explanation:
La configuración electrónica muestra la secuencia de llenado de electrones en los orbitales de los subniveles guiada por algunos principios.
El número máximo de electrones en los orbitales de los subniveles es dos para el subnivel s (un orbital); seis para el subnivel p (tres orbitales); diez para el subnivel d (cinco orbitales) y catorce para el subnivel f (siete orbitales). Esto indica que el número máximo de electrones en un orbital es dos.
Se sabe que un elemento químico que tiene un número atómico Z = 12 y es un átomo neutro es Magnesio (Mg). Sin embargo, dado que tiene el mismo número de protones y electrones; La configuración electrónica esperada se puede escribir como:
1s² 2s² 2p⁶ 3s²
HEMP ME ITS DUE BY MIDNIGHT
Answer:
Explanation:
Option B is the correct answer
QUESTION 8: When would acceleration increase most? *
2 points
Rolling along a flat plane
Rolling down a steep hill
Braking to a stop
Rolling up a gently sloping hill
Answer:
Rolling down a steep hill
Explanation:
Calculate the mass of 120 cc of nitrogen at STP.How many
numbers of molecules are present in it?
2.67 × 10^19
Explaination:
The volume of the gas is 1c.c = 10^ - 3L
∴ Number of moles of the gas is=22.4 × 10^-3
Now,
Number of molecules = n × 6.022 × 10^23
∴ Number of Nitrogen Molecules
= 10^-3/22.4 × 6.023 × 10^23
= 2.67 × 10^19
Answer:
6.02 x 10²⁰ molecules
Explanation:
Given parameters:
Volume of nitrogen = 120cm³
Unknown:
Mass of Nitrogen = ?
Number of molecules present in it = ?
Solution:
At STP;
1 mole of a substance contains 22.4dm³ particles
100cm³ = 1dm³
24cm³ will give 0.024dm³
22.4dm³ of particles are in 1 mole of substances at STP
0.024dm³ of particles will contain [tex]\frac{0.024}{24}[/tex] = 0.001mole
Mass of Nitrogen = Number of moles x molar mass
molar mass of nitrogen = 14g/mol
Mass of nitrogen = 0.001 x 14 = 0.014g
Number of molecules present;
1 mole of a substance contains 6.02 x 10²³ molecules
0.001 mole of Nitrogen will contain 0.001 x 6.02 x 10²³ = 6.02 x 10²⁰
6.02 x 10²⁰ molecules
How would the strength of an electromagnet change if a copper core was
used to replace its iron core?
O A. It would decrease.
B. It would stay the same.
C. It would increase.
D. It would vary unpredictably.
SUBMIT
Answer:
C
Explanation:
Answer: decrease I believe
Explanation:
Just because if you replaced copper with iron it gets stronger
When a new synthetic method is developed, it is applied to a series of compounds to explore its utility. 4-Fluorophenylacetonitrile was used as a substrate in a synthetic methodology research paper. Provide a synthesis for 4-fluorophenylacetonitrile using an SN2 reaction. Begin with a retrosynthesis of the target molecule. identify all
Answer:
See explanation
Explanation:
Since the -CH3CN and the -F are in 1,4 position, then the synthesis started with flourobenzene. This has to be because -F is ortho-para directing in nucleophilic substitution.
The next step is the Friedel craft alkylation of the substrate. The alkyl group is directed to the para position by the -F.
Bromination using NBS yields an alkyl bromide that undergoes SN2 substitution to yield the target compound.
PLEASE HELP ASAP!!!! I give extra points to those who help me!
Explain how you can estimate the number of neutrons in the atoms of an element.
Answer:
to determine the number of neutrons in atom, we only have to subtract the number of protons from the mass number. the nucleus of an atom is composed of protons and neutrons. And the number of particles present in the nucleus is referred as mass number (Also, called as atomic mass).
Explanation:
YUH ITS ON GOOGLE CUH
Angela is a serious basketball player, but lately she has been struggling. First, her legs started getting tired halfway through practice. Next, her bones started aching. This week, she feels like she can’t even take a full breath.
Angela goes to see Dr. Chao. “I feel like my whole body is falling apart. How can there be so many different things going wrong with me at the same time?” Angela asks. Dr. Chao does a physical exam and asks Angela to take a few deep breaths. “Actually,” the doctor responds, “there’s only one small thing wrong with your lungs. Fortunately, there is a medicine that will improve all your symptoms right away.”
How can a problem in Angela’s lungs cause problems all over her body?
Answer:
Because the entire body functions off of the air given to the body through the lungs.
Which of the following has the largest electronegativity? AI, Cu, S, or O?
Answer:
O(Oxygen)
Explanation:
Oxygen or O among the given options has the highest electronegativity of 3.5 as compared to 2.4 of sulfur. Thus, there is a lesser attraction in the bonds of Sulfur. The other two elements Al(Aluminium) and Cu are less electronegative than Sulfur and Oxygen as they are metals and possess electropositivity while the latter displays more electronegativity due to being non-metals. Hence, Oxygen is the answer.
HELP!
Suppose 4.0 grams of H2 were used? How many grams of water would be produced?
Answer:
36g
Explanation:
Given parameters:
Mass of H₂ = 4g
Unknown:
Mass of water produced = ?
Solution:
The reactants in this experiment are hydrogen and oxygen gas. The product formed will be water, H₂O.
Now write the reaction equation first;
2H₂ + O₂ → 2H₂O
Find the number of moles of Hydrogen gas;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of H₂ = 2(1) = 2g/mol
Number of moles = [tex]\frac{4}{2}[/tex] = 2moles
From the balanced reaction equation;
2 moles of H₂ will produce 2 moles of H₂O
So, mass of H₂O produced;
Mass of H₂O = number of moles x molar mass
Molar mass of H₂O = 2(1) + 16 = 18g/mol
Mass of H₂O = 2 x 18 = 36g
We can see from the calculations that the use of 4g of hydrogen produces 36 g of water.
We know that water is produced from the equation;
2H2(g) + O2(g) ----> 2H2O(g)
Number of moles of hydrogen = 4 g/2 g/mol = 2 moles of hydrogen
From the reaction equation, we can see that 2 moles of hydrogen yields 2 moles of water.
Hence, If we use 4g of hydrogen, we end up with 2 moles of water.
Mass of water = 2 * 18 g/mol = 36 g
Learn more about stoichiometry: https://brainly.com/question/1301963
which solution below most likely shows a vivid color?
potassium chloride
nickel chloride
hydrogen chloride
lithium chloride
Answer:
B. Nickel Chloride
Explanation:
Mark as Brainliest!!! Hope this helps:)
Answer:
B. Nickel chloride
Explanation:
did the assignment on edge
Why are fossils
important in the
development of the
geologic time scale?
What is a molecular formula
What is one long-lasting climate change?
Answer:
Scientists have predicted that long-term effects of climate change will include a decrease in sea ice and an increase in permafrost thawing, an increase in heat waves and heavy precipitation, and decreased water resources in semi-arid regions
Explanation:
can you solve this 2+__=9 (constants) and __+__9 (variables)
Answer:
2+7=9(constant)
6.5+2.5=9(variable)
How does the skin help regulate body temperature?
HELP FAST
Answer:
1. The body's immense blood supply (when blood vessels dilate or become larger heat loss occurs) When the blood vessels constrict it holds in heat
2. The skins blood supply also helps maintain body temperature (helps maintain homeostasis which is the "normal" state of our body)
3. Humidity in the air effects thermoregulation (heat regulation in the body) by limiting sweat evaporation (usually sweat evaporates into the environment when the humidity is low because the air has low "water levels" per say while you have high "water levels" because of your sweat
What happens at the cathode
Answer:
At the cathode in an electrolytic cell, ions in the surrounding solution are reduced into atoms, which precipitate or plate out on to the solid cathode. The anode is where oxidation takes place, and the cathode is where reduction takes place. The anode is defined as the electrode where oxidation occurs. The cathode is the electrode where reduction takes place. ... At the cathode, the metal ion in the solution will accept one or more electrons from the cathode, and the ion's oxidation state will reduce to 0. This forms a solid metal that deposits on the cathode.
Someone help me pls!
Answer:
thermal energy from the sun
Explanation:
because the sun have more potencia
True or False-- Siblings (brothers and sisters) may or may not have the same combination of traits.
Answer:
True
Explanation:
Hope it helped. :)
Answer:
definitely true
Explanation:
everyone is different
The formula for bismuth(III) arsenide is..?
Answer:
BiAs
Explanation:
In your own words, describe the purpose of using a chemical equation.
PLEASEEEE HURRY
Answer:
Hey mate, here is your answer. Hope it helps you.
Explanation:
To show how substances in a chemical reaction interact and to keep track of all elements and the number of atoms in each element on each side of the equation.The purpose of writing a balanced chemical equation is to know: the reactants (starting material) and products (end results) that occur. the ratios in which they react so you can calculate how much reactants you need and how much products can be formed.
Answer:
Sample Response: Chemical equations show how chemicals interact when a reaction occurs. They use symbols and formulas to show the chemical reaction so that chemical names do not need to be written out. They also help keep track of all elements and the number of atoms of each element on each side of the equation.
Explanation:
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What is the formula of phosphorus atoms and calcium atoms?
Answer:
Calcium phosphate chemical formula is given as Ca3(PO4)2.
Explanation:
Answer:
Calcium Phosphate is written as Ca3(PO4)2.
Explanation:
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Pure substances made of two or more kinds of atoms bound together
Compound
Mixture
Solution
Salt
An element is determined by the number of
Answer:
The chemical element of an atom is determined by the number of protons, or the atomic number, Z, of the nucleus. The element oxygen has an atomic number Z=8, while carbon has Z=6.
Explanation:
Answer:
The number of protons determines which kind of element an atom is. If an atom has 8 protons, we can determine this element is oxygen.
Explanation:
In the nucleus of an atom, there are protons and neutrons. Protons have a positive charge and neutrons have a neutral charge. All atoms have at least one proton that determines its atomic number.
Which of the following is important to gbellringer #13. Which of the following is important to generating heat?
A. Friction
B. Chemical reactions
C. Sunlight
D. All of the above
Answer:
D.) All of the above
Explanation:
Every answer is possible of creating heat.
* Good luck
Describe the evidence of changes in organisms in the Cambrian Era that are reflected in the fossil record.
Answer:
Morphology and phylogenetics revealed by fossils. Perhaps the strongest evidence to support the Cambrian evolutionary explosion of animal forms is the first clear appearance, in the Early Cambrian, of skeletal fossils representing members of many marine bilaterian animal phyla
Explanation:
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