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Related Questions
3 The weight of an atom is determined primarily by —
A) the total number of protons plus neutrons
B) the total number of protons plus electrons
C) the total number of neutrons plus electrons
D) the total number of electrons, protons, and neutrons
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Answer:
A)The total number of protons plus neutrons= Weight of an atom
Write True/False against the following statements and also correct the false statement.
Greater the calorific value better is the fuel.
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Answer:
I think it is true you should go for true
How is Zinc chloride formed in the lab and please tell the steps
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Answer:
When zinc metal is reacted with hydrochloric acid, hydrogen gas is released and an aqueous solution of zinc chloride is produced. ... It is important that all of the zinc used be reacted and that large excess amounts of hydrochloric acid not be used.
Anhydrous zinc chloride is synthesized by treating zinc with hydrogen chloride. Whereas, hydrated and aqueous forms of zinc chloride are prepared by treating zinc with hydrochloric acid. Zinc metal could either be in the form of zinc sulfide or zinc oxide
Have a nice Day , Hope this helped you I would appreciate it if you could mark my answer brainliest
Merry Christmas
Answer: Anhydrous zinc chloride is synthesized by treating zinc with hydrogen chloride. ... Zinc metal could either be in the form of zinc sulfide or zinc oxide. ZnS(s) + 2 HCl(aq) → ZnCl2(aq) + H2S(g) There are impurities present in zinc chloride samples due to hydrolysis.
got this from goo.gle
Hope this helps.......... Stay safe and have a Merry Christmas!!!!! :D
What are the needs & advantages of career planning?
in the blanks using the options given below:
Career is a sequence of related jobs arranged in a .........order.
Wrong choice of career may lead to.................
Agriculture, veterinary and nursing provide better........ ... to
young people.
Poor health and safety condition in an organization
causes.................effect on the choice of career.
The essence of career planning is the................ of individual goal
with organizational goal.
gative, hirarchical, frustration, bridging, lucrative, attraction
Answers
Answer:
The correct options are;
1) Hierarchical
2) Frustration
3) Attraction
4) Gative
5) Bridging
Explanation:
A career can be defined as a person's trade or occupation, which he or she engages and progresses in for a considerable portion of his or her life
When a person is engaged in a career that is not best suited to them can therefore lead to frustration, due to the length of time required in building a career
Agriculture, veterinary and nursing are mainly hands on or time input (for agriculture) careers, that seek to attract young people
The existence of poor health and safety conditions in an organization limits the advancement of individuals in their chosen career within the organization
Therefore, we have;
Career is a sequence of related jobs arranged in a hierarchical order
Wrong choice of career may lead to frustration
Agriculture, veterinary, and nursing provide better attraction to young people
Poor health and safety conditions in an organization causes gative effect on the choice of career
The essence of career planning is the bridging of individual with organizational goal.
What is the approximate energy of a photon having a frequency of 4 x 10^7 Hz? (h = 6.6 x 10^-34 J . s)
Answers
Answer:
2.64 ×[tex]10^{-26}[/tex] J
Explanation:
I think you should mark it a physics question instead but anyway.
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The Planck equation should be applied:
E = hv , while E is energy of proton; h is Planck constant; and v is frequency.
E = 6.6 × [tex]10^{-34}[/tex] × 4 × [tex]10^{7}[/tex]
= 6.6 × 4 × [tex]10^{-27}[/tex]
= 2.64 ×[tex]10^{-26}[/tex] J
What did the Curies conclude about radioactivity based on their studies?
A. The amount of radioactivity is an extensive property because it varies as the amount of material varies.
B. The amount of radioactivity is an extensive property because it remains constant as the amount of material varies.
C. The amount of radioactivity is an intensive property because it varies as the amount of material varies.
D. The amount of radioactivity is an intensive property because it remains constant as the amount of material varies.
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Answer:
c
Explanation:
Hi! Can you help me with this?
Is a hydrogen gas a element, compound, or mixture?
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Answer:
Hydrogen gas (H2) is a molecule, but not a compound because it is made of only one element. Water (H2O) can be called a molecule or a compound because it is made of hydrogen (H) and oxygen (O) atoms.
Explanation:
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Answer:
It's an element. :)
Explanation:
For questions 14-16 pick out the variables that will be needed to answer the following question: Do trees grow faster if it is wetter in the summer?
14) What is the independent variable?
a.) amount of rain
b.) no rainfall
c.) amount of growth
15) What is the dependent variable?
a.) amount of rain
b.) no rainfall
c.) amount of growth
16) What is the control?
a.) amount of rain
b.) no rainfall
c.) amount of growth
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Answer:
14) A. amount of rain
15) C. amount of growth
16) B. no rainfall
Explanation:
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what is meant by polimer
Answers
Answer:
i don't knoblol
Explanation:
i don't know lol
Answer:
a compound of high molecular weight derived either by the addition of many smaller molecules, as polyethylene, or by the condensation of many smaller molecules with the elimination of water, alcohol, or the like, as nylon. a compound formed from two or more polymeric compounds.
Explanation:
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Write the name of the covalent compound ON.
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Answer:
the answer is oxygen mononitride
In order to determine if 2 atoms are cooper what must be the same for each
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-atom size
-charge of the atom
-number of protons
What is the bond angle that corresponds to the
geometry associated with C1 in the structure?
A. 120° B. 90O
C. 1800
D. 109.5o
7. Between which bonded elements in the above
structure is there the strongest dipole moment?
A. Carbon to Carbon B. Hydrogen to Carbon
C. Oxygen to Carbon D. Oxygen to Hydrogen
8. What is the geometry associated with the C2 molecule in the structure?
A. linear B. trigonal planar C.bent D. tetrahedral
9. Among the choices below, which correctly describes the bonding taking place in the above structure?
A. 6 sigma bonds, 1 pi bond C. 6 sigma bonds, 2 pi bonds
B. 7 sigma bonds, 1 pi bond D. 7 sigma bonds, 2 pi bonds
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Both the esophagus and the small intestine are involved in the digestion of food. The esophagus squeezes food into the stomach by wave-like muscle contractions. Peptidase enzymes in the small intestine break food molecules into smaller molecules.
Which statement best describes changes to food during digestion?
A. The muscle contractions result in physical changes, while the action of the peptidase results in chemical changes.
B. The muscle contractions result in chemical changes, while the peptidase results in physical changes.
C. The muscle contractions and the action of the peptidase both result only in physical changes.
D. The muscle contractions and the action in the peptidase both result only in chemical changes.
Answers
Answer:
The answer is: A
Explanation:
The wave-like contractions are to be considered a physical change as they do not take part in the breaking-down of the food. The peptidase is a chemical change because it is used to chemically break down the food to retrieve nutrients and such.
Which statement best describes what would happen to an ecosystem once the sun is removed?
A. The functions within the ecosystem will eventually stop & everything will die off.
B. The ecosystem will continue to thrive; it does not need the sun's energy to work.
C. The ecosystem will look for a different source of energy to use.
D. The ecosystem will instantly stop working.
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Answer:
A. The functions within the ecosystem will eventually stop & everything will die off.
Explanation:
Everything is dependent on the sun --starting from the bottom of the food chain, the producers. However, we wouldn't die instantly because "Earth retains heat fairly well, so humans wouldn't freeze instantly."
Which of the following is NOT needed for photosynthesis to take place?
A. glucose
B. chlorophyll
C. water
D. light energy
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you only need 4 things to form photosynthesis
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21. Which answer best describes the coast?
A. thick deposits of sediments carried off of the shelf
B. the surf area along coastlines
C. 75 mile shallow flat area just off coastlines
D. area of land that drops toward deep ocean basins
Answers
Answer:
C
Explanation:
75 mile shallow flat area just off coastlines
What is Newton's First Law known as? The Law of
____
Answers
Answer:
inertia
Explanation:
Answer:
Law of inertia, also called Newton's first law, postulate in physics that, if a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.
Explanation:
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What energy transformation occurs when a person is running
Answers
Answer:
Kinetic Energy (Hope This Helps)
Explanation:
(Brainliest)
Answer:
Chemical energy to kinetic energy. (Arguably heat energy (thermal) because of respiration)
What object do you think will take up
more space? Why do you think this?
Answers
Answer:
solids
Explanation:
BC they r heavier than liquid and gas
A 0.85% saline solution is: a.8.5 mL of saline added to 91.5 mL of water b.85 g of NaCl made up to 1,000 mL of water c.0.85 g NaCl made up to 100 mL of water d.8.5 g NaCl in 100 mL of water
Answers
Answer:
c
Explanation:
A 0.85% saline solution would consist of 0.85 g NaCl made up to 100 mL of water.
A 0.85% saline solution contains 0.85% by weight of NaCl. Hence, in order to prepare such a solution, 0.85 g of NaCl is weighed out into a beaker or cylinder and distilled water is added up to the 100 mL mark. On the other hand, 8.5 g of the NaCl can be weighed out and then distilled water added to 1000 mL mark.
The correct option is, therefore, c.
what is a metorlogist
Answers
an expert in or student of meteorology; a weather forecaster.
1. Does elevation play a factor? If so, can the elevation be changed to protect the homes? 2. Could the residents build a structure that would prevent a tsunami from reaching the community? What would this structure look like? How would the residents build it? 3. What could limit the erosion of the beach?
Answers
Answer:
Yes.
Explanation:
Yes, elevation play a great role and has the ability to protect homes from natural disasters such as flood and tsunami etc. The residents build a hard structure of wall along the beach that would prevent a tsunami from reaching the community and also built homes at higher elevation. The residence built it with the help of government and this wall is also effective in reducing the erosion of the beach.
Answer:
1. Yes elevation does play a factor if the house was higher i feel like it wouldnt get as damaged
2. Yes they could build a high enough wall that it would take most of the impact away from the houses, you would build it with the thickest peice of wood that you could find and use long screws and cement the wood into the ground.
3. The wall will also help from erosion
Explanation: i got it right on my project.
Question 11 of 32
When do scientists form a hypothesis?
A. Before they form a theory
B. After they form a theory
O C. Before they perform an experiment
D. After they perform an experiment
SUBMIT
Answers
Answer:
C
Explanation:
a hypothesis always comes first
Answer:
C
Explanation:
They form hypothesis first, then perform the experiment to test the hypothesis. After multiple experiments, they form a theory.
Thus C is correct
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please help im stuckkkk
Answers
Answer:
Just in case you want confirmation yes, its mid ocean ridge
When a substance is changed from a solid to liquid energy is_ _ _ _ d *81 points*
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Answer:
That change is known as melting.
Explanation:
I am not sure what you are asking. I hope this helps!
Which phrase justifies why the theory of evolution is a theory and not a law?
1. Describes the relationship between an organism and its environment
2. Makes accurate predictions based on only a small amount of empirical evidence
3. Explains diversity based on the principle of natural selection
4. Cannot be modified with the discovery of new evidence
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Answer:
2. Makes accurate predictions based on only a small amount of empirical evidence
Explanation:
For a phrase or scientific finding to be considered a law, there has to be clear evidence and facts to support that specific finding. In the case of the evolution theory, the evidence is not clear enough to make it a law
Answer:
2. Makes accurate predictions based on only a small amount of empirical evidence
Explanation:
X-rays had a frequency of about 3x10^18 determine it's wavelength (in nm) and energy per photon
Answers
Answer:
λ = 0.1 nm
E = 2 × 10⁻¹⁵ J
Explanation:
Step 1: Given data
Frequency of X-rays (ν): 3 × 10¹⁸ s⁻¹
Step 2: Calculate the wavelength (λ) of a photon of X-rays
We will use the following expression.
c = λ × ν
where,
c: speed of light
λ = c / ν
λ = (3.00 × 10⁸ m/s) / 3 × 10¹⁸ s⁻¹
λ = 1 × 10⁻¹⁰ m × (10⁹ nm/1 m) = 0.1 nm
Step 3: Calculate the energy (E) of a photon of X-rays
We will use the following expression.
E = h × ν
where,
h: Planck's constant
E = 6.63 × 10⁻³⁴ J.s × 3 × 10¹⁸ s⁻¹
E = 2 × 10⁻¹⁵ J
How does the atomic radius of an element is related to its metallic character
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Answer:
The large the atomic radius the more the metallic character of elements
Explanation:
The atomic radius is related to the metallic character in a way that the larger the atomic radius, the more metallic a body becomes.
Therefore, as we go down a group, metallic character increases.
Metallic character relies on the ability and willingness of an atom to share its valence electrons. As the size of an atom becomes large, the more metallic it is and the more its metallic character. In some other cases this character is known as electropositivity.Question 10 of 32
Which of the following is an example of how the same chemicals used to
help people can harm the environment?
O A. Phosphates are removed from detergents so they don't end up in
drinking water.
B. Hillsides erode after plants are removed to clear a space for crops.
C. Plants grow back after toxic chemicals are removed from the
surrounding soil.
D. Excess fertilizers run off into rivers and create a dead zone.
SUBMIT
Answers
Answer:
D
Explanation:
The correct answer that gives a good example of how the same chemical used to help people can harm the environment would be when excess fertilizers run off into rivers and create a dead zone.
Fertilizers are usually applied to crops as an agricultural practice by farmers to enhance the yield of the crops and boost food or raw materials production. However, excess fertilizer gets washed into nearby water bodies and ends up creating a low-oxygen zone that is incapable of supporting lives within the water body - also known as dead zones.
The correct option is, therefore, D.
A 100 gram sample of naturally occurring boron contains 19.78 % of B-10 and 80.22 % of B-11. Which numerical setup can be used to determine the atomic mass of naturally occurring B
Answers
Answer:
The required numerical set up is;
RAM = (19.78% * 10) + (80.22% * 11)
Explanation:
The relative atomic mass is the sum of the products of the mass of each isotope and its relative abundance.
Hence the relative atomic mass of Boron is obtained form;
RAM = (19.78% * 10) + (80.22% * 11)
RAM = (1.978) + (8.8242)
RAM =10.8022