Answer:
Explanation:
Convert 3.55 moles Nacl to formula units
Answer:
2.14 x 10²⁴ formula units
Explanation:
Given parameters:
Number of moles of NaCl = 3.55moles
Unknown:
Formula units of NaCl = ?
Solution:
A mole of substance contains the avogadro's number of particles. The number of particles could be protons, atoms, neutrons, formula units etc.
1 mole of substance = 6.02 x 10²³ formula units
3.55 mole of NaCl = 3.55 x 6.02 x 10²³
= 2.14 x 10²⁴ formula units
Please answer 7-9 i am using alot of my points for this
Answer:
7... simalair: made of more than 2 things DIffernt: elemants are made of atoms.
Explanation:
How is energy sent from Earth to space?
conduction and convection
radiation and conduction
reflection and conduction
radiation and reflection
Answer:
radiation and reflection
Explanation:
Energy is send from space to earth by radiation and reflection. The most predominant way in which heat is transferred from earth to space is by radiation.
The source of energy for the earth is heat from the sun. This heat can be sent back to space when they are reflected back from the earth and radiated into space.Answer:
radiation and reflection
hope helps you
have a nice day
Santiago's car has an overall average speed of 25 cm/s. If he could increase his car's overall average speed by 10%, what would his car's new overall average speed be?
Given:
The overall average speed = 25 cm/s.
The overall average speed increased by 10%.
To find:
The new overall average speed.
Solution:
We have,
Overall average speed = 25 cm/s.
The overall average speed increased by 10%. So, the new average speed is
New overall average speed = Initial average speed + 10% of initial overall average speed
[tex]\text{New overall average speed}=25+\dfrac{10}{100}\times 25[/tex]
[tex]\text{New overall average speed}=25+2.5[/tex]
[tex]\text{New overall average speed}=27.5[/tex]
Therefore, the new overall average speed is 27.5 cm/s.
What holds the two parts of a metal together?
S
E
A
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!
Zinc metal reacts with copper sulfate through the following
reaction:
Zn + CuSO4 → Cu + ZnSO4
The percent yield for a reaction in which 32.5 g of Zn is
reacted in excess CuSO4 solution is 85.0 %. What is the
actual yield of copper of this reaction?
g
Your answer should be rounded to three significant figures. Do not include
units in your answer.
Answer:
26.9
Explanation:
answer correctly for a brainleist! :)
Answer:
summer
Explanation:
Why because the earth is around the sun the
Which statement describes the blood type of a person with the alleles IAi?
It is type AB because I and i are codominant.
It is type AB because A and i are codominant.
It is type A because i is dominant and A is recessive.
It is type A because A is dominant and i is recessive.
Answer:
I answer this question I think I said the second one
Answer:
yep its the second one
Explanation:
The photograph shows one way individuals work together in groups. What
kind of work is shown in the photograph?
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?
Answer:
1.Irreversible
2.Physical
3.
which of the following is NOT a substance?
A. sodium
B. water
C. alcohol
D. air
E. table salt
can select more than one if needed
Answer:
c. alcohol
it has no substance
What classification should this reaction have? CaC12 + F2 = CaF2 + CI2
Answer:
Single-Replacement Reaction
General Formulas and Concepts:
Types of Reactions
Synthesis Reactions: A + B → AB Decomposition Reactions: AB → A + B Single-Replacement Reactions: A + BC → AB + C Double-Replacement Reactions: AB + CD → AD + BCExplanation:
Step 1: Define reaction
CaCl₂ + F₂ → CaF₂ + Cl₂
Step 2: Identify backplate
Single-Replacement Reactions: A + BC → AB + C
BC = CaCl₂
A = F₂
AB = CaF₂
C = Cl₂
compare the values of the spin quantum number for two electrons in the same orbital
Which of the following is a chemical property?
A:
mass
B:
oxidizes in air
C:
boiling point
D:
solubility
What is differentiation
Answer:
The Definition of Differentiation
The derivative is the instantaneous rate of change of a function with respect to one of its variables. This is equivalent to finding the slope of the tangent line to the function at a point
Explanation:
Indicate the answer choice that best completes the statement or answers the question.
The crust and upper mantle make up Earth's
O a. lithosphere Ob. asthenosphere
O d. continents
Oc. core
Question 2
Question 3
Question 4
Question 5
Question 6
Question 7
Question 8
Question 9
Question 10
Question 11
Question 12
Question 13
Question 14
Question 15
Question 16
Question 17
Question 18
Question 19
Question 20
LO
Answer: lithosphere
Explanation:
continents are a part of lithosphere.
core is a structure of earth
what is the total number of electrons found in the valence shell of noble gas in the ground state?
Answer:
eight
Because the noble gases are the least reactive of all elements, their eight valence electrons are used as the standard for nonreactivity and to explain how other elements interact.
Explanation:
which reaction is faster?why?
Answer:no answer
Explanation:
Temperature. Usually reactions speed up with increasing temperature. Physical state of reactants. Powders react faster than blocks - greater surface area and since the reaction occurs at the surface we get a faster rate.
A person aims for a target with a wooden bow and arrow. The image shows the path of the arrow to the target. How can the person increase the elastic potential energy in this situation? A) aim the bow higher, increasing the height of the arrows flight. B) sharpen the arrows tip, causing it to strike the target with more force. C) change the bow’s material, increasing the stiffness of the bow. D) pull the arrow farther back, increasing the stretch of the bows string.
Answer:
d
Explanation:
The concept of continental drift was developed by Alfred Wegener. Which of the following pieces of evidence does NOT support Wegener's hypothesis?
Group of answer choices
Fossils of the same organisms are found on different continents.
Similar glacial sediments are found in different parts of the world.
The shapes of the continents fit together like pieces of a jigsaw puzzle
Climates at different latitudes are similar to one another.
Answer:
Climates at different latitudes are similar to one another.
Explanation:
The choice that is not a proof of Wegener's concept of concept of continental drift is that climates at different latitudes ae similar to one another.
Wegener did not use climatic evidence to proof continental drift. He did use fossils found on different continents such as the mesosaurus to propose the theory of continental drift. Wegener also used evidence of glacial sediments to justify his claims. He also fitted the earth into a giant puzzle.Answer:
Climates at different latitudes are similar to one another.
plzzz!!! Write the equation for rusting urgently needed
Answer:
[tex]Fe_{2} O_{3}[/tex]
Explanation:
Quinton answer me or I will never talk to u again pls
Answer:
huh
Explanation:
Which of the following are reactants in the equation below? Select all that apply.
Zn(s) + CuSO4(aq) = ZnSO4(aq) + Cu(s)
Select all that apply:
A) Zinc
B) Copper
C) Copper (ll) sulfate
D) Zinc sulfate
Answer:
Zinc, copper sulfate
Explanation:
The reactants are the ones on the left side
In the given reaction, it is clearly visible that Zinc and Copper (II) sulfate are the reactants in the equation below. Thus, the correct options are A and C.
What are Reactants?Reactants may be defined as substances or compounds that undergo chemical reactions and have been altered during the course of an incident. Such compounds or substances most of the time are catalyzed by numerous catalysts in order to accomplish the conversion of reactancts substances faster.
The given reaction illustrates an example of a displacement reaction. During this reaction, when zinc is added to copper sulfate solution, zinc displaces copper and forms zinc sulfate solution. It will demonstrate a type of redox reaction.
This happens because on the basis of the reactivity series which determines that zinc is considered to be more reactive than copper.
Therefore, in the given reaction, it is clearly visible that Zinc and Copper (II) sulfate are the reactants in the equation below. Thus, the correct options are A and C.
To learn more about Displacement reactions, refer to the link:
https://brainly.com/question/13935998
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what is the substance of air
Answer:
The air in the atmosphere consists of nitrogen, oxygen, which is the life-sustaining substance for animals and humans, carbon dioxide, water vapour and small amounts of other elements (argon, neon, etc.). Higher in the atmosphere air also contains ozone, helium and hydrogen.
Explanation:
:))
Most solid solutes will dissolve ___ at ___ temperatures
A. slower, higher
B. faster, higher
C. faster, lower
Answer:
B
Explanation:
The increase in kinetic energy that comes with higher temperatures allows the solvent molecules to more effectively break apart the solute molecules that are held together by intermolecular attractions.
11/9/2020
Describe the types of possible
weathering that has occurred to
this boulder
Use vocab words to describe what
is happening
ROY G BIV arranges the colors of the rainbow *
In order of increasing energy
In order of increasing wavelength.
O In order of decreasing frequency.
Answer:
Wavelengths..
Explanation:
The colors we see always go from red, which is least refracted, through orange, yellow, green, blue, indigo and violet -- Roy G Biv. The blue, indigo and violet wavelengths are refracted the most as sunlight passes through raindrops.
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-
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.
Learn more about Ions, here:
https://brainly.com/question/30663970
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What happens if you overmix muffins?
Answer: When you overmix the muffin batter, it crushes the air bubbles and ruins the fluffy texture.
Explanation: → Follow this tip: To ensure a batch of light, fluffy muffins, mix the dry ingredients with the wet ingredients until just barely combined, and no more dry flour is visible.
Why does the salt reappear when the water evaporates??
Answer:
Salt particles move about the water. Each particle is surrounded by water molecules.The water particles (molecules) keep the salt particles from rearranging themselves back into a salt crystal. Salt particles are carried throughout the solution surrounded by water particles.
As the water evaporates less and less water molecules are present to keep the salt particles apart. The salt therefore recrystalises and can be collected.
Explanation:
Hope this helped!
-B