Answers
Answer:
69
Explanation:
Related Questions
Why are noble gases called "safe" gases?
Answers
Answer:
Noble gases are called "safe" gases because they are inert.
General Formulas and Concepts:
Reading a Periodic TableChemical Properties of Noble GasesExplanation:
Because Noble Gases have filled their outer shell electrons fully, they tend not to form compounds with other elements or react with others to produce another compound.
Take Ne (neon) for instance. It's electron configuration is 1s²2s²2p⁶. The outer most shell is the 2p sublevel, and according quantum numbers, the 2p sublevel only has 3 spaces for 2 electrons each that it can hold. Therefore, Ne has a full outer shell and no electron spots to create a bond with other elements.
please help me with honors chem I will give brainliest answer
Answers
Answer:
see the pic for the answer
Is the rate of decay fastest at the beginning, middle, or end of the process?
Answers
Answer:
The beginning
Explanation:
In a nuclear reaction, the rate of decay is fastest at the beginning of the process.
What are nuclear reactions?There are two types of nuclear reactions which are nuclear fusion and nuclear fission .They involve the combination and disintegration of the element's nucleus respectively.
In nuclear fission, the nucleus of the atom is bombarded with electrons of low energy which splits the nucleus in to two parts .Large amount of energy is released in the process.It is used in nuclear power reactors as it produces large amount of energy.
In nuclear fusion,on the other hand, is a reaction which occurs when two or more atoms combine to form a heavy nucleus.Large amount of energy is released in the process which is greater than that of the energy which is released in nuclear fission process.
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an_____is a trait that a organism inherits that makes it more suited to it's natural envormemt, helping it survive
Answers
adaptation may be i guess
Heeeeelppppp! Serious answers only
Please :(
Answers
Answer:
1. A
2. C
Explanation:
Answer:
there are 3 elements in question 1 and 4 atoms in question 2
Explanation:
How many atoms are there in 2.43 g of calcium?
Answers
Answer:
Explanation:
We're asked to calculate the number of atoms of
Ca
in
153
g Ca
.
What we must first do is convert the given mass of calcium to moles of calcium, using its molar mass (referring to a periodic table, this is
40.08
g
mol
):
153
g Ca
(
1
mol Ca
40.08
g Ca
)
=
3.82
mol Ca
Using Avogadro's number,
6.022
×
10
23
particles
mol
, we can calculate the number of atoms present:
3.82
mol Ca
(
6.022
×
10
23
atoms Ca
1
mol Ca
)
=
2.30
×
10
24
atoms Ca
What is the formal charge of carbon in CO?
|C≡O|
Answers
Answer:
FC of C = -1
General Formulas and Concepts:
Lewis Dot StructuresResonance StructuresFormal Charge: FC = # of valence e⁻ - # of lone e⁻ - # of bondsExplanation:
Step 1: Define
Carbon (C)
4 valence e⁻2 lone e⁻3 bondsOxygen (O)
6 valence e⁻2 lone e⁻3 bondsStep 2: FC of C
Substitute: FC = 4e⁻ - 2e⁻ - 3Subtract: FC = -1can you help please??
Answers
Answer:
no
Explanation:
Answer:
The answer is B
Which of the following best describes H2(g) + Cl2(g) → 2HCl(9), AH = -184.6
kJ/mol?
A. The reaction requires heat.
B. The reaction has no activation energy.
C. The reaction is endothermic.
D. The reaction produces heat.
I’ll give ya brainliest
Answers
Answer:
D
Explanation:
ap
The statement that best describes the reaction [tex]\rm H_2(g) + Cl_2(g) \rightarrow 2HCl(9), AH = -184.6[/tex] is the reaction has no activation energy.
What is activation energy?Activation energy is the small amount of energy which is required to start a reaction.
This is the kinetic energy of the reactant molecules, which helps them to collide.
High activation energy means the reaction will be slow.
Low activation energy means a high rate of energy.
Thus, the correct option is B.
Learn more about activation energy
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State whether the following are elements, compounds or mixtures
Salt
Sugar
Hydrogen
Oxygen
Tomato sauce
cake batter
Nitrogen
Aluminium
Gulab Jamun
Water
Salty water
Answers
Answer:
?
Explanation:
Answer:
hydrogen, nitrogen, oxygen, aluminium are elements
salt, sugar, tomato sauce, cake batter, salty water are mixtures
Explanation:
all the elements in the group halogens in the periodic table are compounds.
Select the arrow that would accurately diagram this thermal energy transfer.
Hot Cold
Question 5 options:
←
↺
→
↻
Answers
Answer:
I thing the accurately diagram is =>
Answer:
→
Explanation:
i took the test
What holds the two parts of a metal together?
S
E
A
Answers
Answer: The metal is held together by the strong forces of attraction between the positive nuclei and the delocalized electrons (The Electron Sea Model.
Explanation: I hope that helped!
What are the similarities and differences in slurries, sols, pastes and gels?
Answers
I actually do not know the answer can I help tommorow if you are fine with it tooo sleeeepy have 14 exams tommorow have to prepare.
Sorry:(
Why do gases released by incinerators cause problems
Answers
Answer:
Waste incineration is one of many societal applications of combustion. ... Municipal solid-waste furnace designs have evolved over the years from ... To achieve complete combustion, gases produced must remain in the ... do not suffer rapping re-entrainment and dust layer back-corona problems associated with dry ESPs.
Explanation:
what evidence lead rutherford to propose that the atom had a nucleus?
Answers
Answer:
When he shot radiation through gold foil, some of the radiation shot back, some went directly through, and some slight angled off.
Explanation:
He knew that the radiation that had gone all the way through had not hit anything.
He knew that the radiation that came directly back must have hit a big nucleus.
He knew that the radiation that angled slightly off must have hit a smaller, orbiting particle (electrons).
Question 4 (1 point)
How much energy is needed to melt 15.4 grams of water at 0 degrees Celsius? (AHrus-334 J/g)
b
21.7)
5.1)
5.1 kJ
21.7 kJ
с
d
Answers
I am new I am 7 my big brother told me to get this
Answers
Answer:
cool! Welcome. On this app we help people who need help with schoolwork.
What does the notation tt mean to geneticists? *
Answers
........
why is the chemical reaction between nitric acid and sodium hydroxide called a neutralization reaction?
Answers
Answer:
Because nitric acid is acidic in nature and sodium hydroxide is basic in nature so when acid and base react they become neutral.
An ecologist is studying ecosystems in the rainforest biome. Which of the following is an
abiotic observation he would record?
Answers
Answer: any non-living thing
Explanation: abiotic means non-living
The Abiotic observation that the ecologist would record are ;
Soil type, Climate Precipitation and SunlightAbiotic factors in ecosystem are the non-living factors that play an essential role in determining how an ecosystem is different from other ecosystems. Some of the Abiotic factors that will distinguish ecosystems in the rainforest biome include ;
The temperature of the rainforestThe Soil type Climate conditions Precipitation and Amount of sunlight .Hence we can conclude that The Abiotic factors/observation that the ecologist would record are ; Soil type, Climate , Precipitation and Sunlight
The options to your question are missing hence a general answer is provided above
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Bromine has a higher ionization energy than chlorine
True or False
Answers
Answer:
Chlorine
Explanation:
Since chlorine is above bromine in the periodic table, following the trends of ionization energy in the periodic, the further up you go the more energy is required to ionize an atom.
The rock was white and black speckled with a density of 2.6 g/mL. Physical or chemical property?
Answers
Answer:
Chemical
Explanation:
b) Calculate the relative atomic mass for magnesium using the information below (to 3
significant figures).
Magnesium has three common isotopes, magnesium-24, magnesium-25 and magnesium-26.
Their abundances are 79.0%, 10.0% and 11.0%, respectively.
Answers
Answer:
Relative atomic mass = 24.32 amu.
Explanation:
Given data:
Relative atomic mass of Mg = ?
Abundance of Mg-24 = 79.0%
Abundance of Mg-25 = 10.0%
Abundance of Mg-26 = 11.0%
Solution:
Relative atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Relative atomic mass = (79.0×24)+(10.0×25) +(11.0×26) /100
Relative atomic mass = 1896 + 250 + 286 / 100
Relative atomic mass = 2432 / 100
Relative atomic mass = 24.32 amu.
Which is the role of the gall bladder? PLEASE HURRY I WILL MARK YOU BRAINLYEST
A:to provide physical digestion
B:to stored the liquid produce by the liver
C: to make the liquid that is stored in the liver
D: to decrease the chemical digestion
Answers
Answer:
The gallbladder is a pear-shaped, hollow structure located under the liver and on the right side of the abdomen. Its primary function is to store and concentrate bile, a yellow-brown digestive enzyme produced by the liver. The gallbladder is part of the biliary tract
Answer:
a.............................
the diagram below represents a portion of a cell membrane. The arrow indicates that the cell membrane is carrying out the process of...
Answers
Answer:
I'm feeling nice today so heres the answer
Explanation:
In the portion of the cell membrane shown in the diagram, the arrow indicates the process of active transport.
Explanation:
Active transport is one of the mechanisms of transmembrane transport, which involves the use of energy. The diagram (see image) shows the hydrogen (H⁺) output from the cytoplasm to the extracellular space, through an H⁺ pump —consuming ATP— which represents an active transport process.
The hydrophobic nature of the cell membrane prevents the free passage of hydrosoluble elements or ions, as H⁺, so they require the use of active transport to pass through it.
The other options presented are not correct, because
Respiration is a process that occurs in the mitochondria.
Diffusion is a passive transport process that does not require energy.
Cellular recognition depends on membrane proteins that act as specific receptors.
Answer:the answer is active transport
Explanation:
Why does the human eye see different colors?
Answers
Answer:
The human eye and brain together translate light into color. Light receptors within the eye transmit messages to the brain, which produces the familiar sensations of color. ... Rather, the surface of an object reflects some colors and absorbs all the others. We perceive only the reflected colors
Explanation:
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Choose one of Rutherford’s discoveries and explain why it intrigues you. If it doesn’t intrigue you, make it up. Give me one paragraph for this (5 sentences).
Answers
Answer:
i am pooop but stink fart
Explanation:
If the half-life of Uranium-235 is 176000 years and 12.5 g of Uranium-235 remain after 704000 years, how much of the radioactive isotope was in the original sample.
Answers
1. Raw egg to boiled egg.
2. Batter to idli.
3. Wet clothes to dry clothes.
4. Woollen yarn to knitted
sweater.
5. Grain to its flour.
6. Cold water to hot water.
7. Straight string to a coiled string.
8. Bud to flower.
9. Milk to Cheese.
10. Cowdung to biogas.
II. Ice cream to melted ice-cream.
12. Stretched rubber band to
its normal size.
13. Souring of milk.
14. Ripening of a mango.
15. Dissolving sugar in water.
these are reversible or Irreversible, chemical or physical, Natural or manmade, periodic or non periodic,desirable or undesirable?
Answers
Answer:
This is man made and natural
What ion will be formed by the selenium atom shown below when it has a stable set of valence electrons?
Selenium atom
A. Se6+
B. Se2+
C. Se6-
D. Se2-
Answers
Answer:
Explanation:
D. Se2−
Selenium is in Group 16 of the periodic table, and it typically has 6 valence electrons. To achieve a stable set of valence electrons, it will either try to gain two more electrons to form Se²⁻or lose six electrons to form Se⁶⁺. Therefore, the correct option is option D.
An ion is an atom or a molecule that has gained or lost one or more electrons, resulting in an unequal number of protons and electrons. When an atom gains electrons, it becomes negatively charged and is called an anion. Conversely, when an atom loses electrons, it becomes positively charged and is called a cation.
Ions play a crucial role in chemical reactions and the formation of chemical compounds, as they are attracted to one another based on their opposite charges. This process helps stabilize the electron configuration and achieve a more stable, lower-energy state.
Thus, the ideal selection is option D.
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