Pls help me I don’t understand it’s for my science class.
Plz check if correct and tell me wether each is element or compound
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Answer:
gold - element
nickel- element
Related Questions
how many moles of carbon are in 3.0 moles of c6h12o6
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Answer:
i.e. mass of 1 mole of glucose, C6H12O6 = (6 × 12.01 + 12 × 1.01 + 6 × 16.00) g = 180.18 g (using atomic weight data to 2 decimals) 1 mole of carbon atoms weighs 12.01 g and there are 6 moles of C atoms in 1 mole of glucose, so the mass of carbon in 1 mole of glucose = 6 × 12.01 g = 72.06 g.
Based on the chemical equation, use the drop-down menu to choose the coefficients that will balance the chemical equation:
( )O2->( )O3
1 1
2 2
3 3
Its one of the numbers for each blank space inside the parenthesis
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Answer: (1)CaSO4 -> (2)O2 + (1)CaS
Explanation: edge 2020 chem
which has a greater atomic size carbon or boron
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Answer: Boron
Explanation:
hope this helps
Answer: Boron.
Explanation: The trend of atomic radius increases as we go from right to left on a periodic table, so since Boron is further left, Boron has a slightly larger radius.
What holds the two parts of a metal together?
S
E
A
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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 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.
Learn more about Ions, here:
https://brainly.com/question/30663970
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11/9/2020
Describe the types of possible
weathering that has occurred to
this boulder
Use vocab words to describe what
is happening
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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
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LO
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Answer: lithosphere
Explanation:
continents are a part of lithosphere.
core is a structure of earth
Quinton answer me or I will never talk to u again pls
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Answer:
huh
Explanation:
What type of chemical reaction can be seen below?
C2H6 + O2 - CO2 + H2O
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Which of the following is a balanced equation for the reaction described below?
Aqueous copper (II) chloride reacts with solid aluminum to produce aqueous aluminum chloride and solid copper.
A) CuCl2(aq) + Al(s) = AlCl3(aq) + Cu(s)
B) 3Cu2 Cl(aq) + Al(s) = AlCl3(aq) + 6Cu(s)
C) CuCl(aq) + Al(s) = AlCl(aq) + Cu(s)
D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)
Answers
The balanced equation for the reaction is
3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s). The correct option is - D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)
From the question,
We are to determine which of the given equation for the described reaction is balanced.
The described reaction is the reaction between aqueous copper (II) chloride and solid aluminum to produce aqueous aluminum chloride and solid copper.
That is,
CuCl₂(aq) + Al(s) = AlCl₃(aq) + Cu(s)
Now, we will balance the above equation, using the smallest whole number coefficients
The balanced equation for the reaction is
3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s)
Hence, the balanced equation for the reaction is
3CuCl₂(aq) + 2Al(s) = 2AlCl₃(aq) + 3Cu(s). The correct option is - D) 3CuCl2(aq) + 2Al(s) = 2AlCl3(aq) + 3Cu(s)
Learn more here: https://brainly.com/question/18443511
Name the change of state when a liquid becomes a gas
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Answer: Evaporation
Explanation: the process of turning from liquid into vapor
awnser this they had no subject so i pick that for science for brainliest awnser
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Answer:
B
Explanation:
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.
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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.
is this anwser correct
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Answer:
Yes. It is definitely correct
Is it OK for people to post fake vacation pics and other fake info on social media? Why or why not? Use facts and details from the Article to back up your answer.
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Answer:
No, It is not okay to pretend on social media.
Explanation:
No, it is not okay for people to post fake vacation pics and other fake info on social media. This is very wrong, as -
This 'all time look good, feel good, have a happening life' approach of social media - implies showing only the positive side & not negative side of people's life. However, in real life is not a bed of roses. Faking things out implies that pretending to be cool has become more important than sharing deep meaningful relationships, & highlights superficial desire of false popularity. It is also harmful to people being communicated this fake image, as they might indulge into any social involvement, on the basis of unreal image of the concerned person.Answer:
it is not ok because there are other people that will look at those pictures and say aww i wish i were them but we all need to exept who we are
hope this helped
mark me brainliest please
Explanation:
Any 1 know These Chemicals??
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Answer:
A) 1 & 2 only
Explanation:
Seeing that the chemicals present are in question one I take it you are asking about that question.
Decreasing the concentration causes a decrease in reaction process and also the total amount of product you would get out of the given reaction
Decreasing the temperature causes the molecules in this reaction to become less excited or reactive, thus causing the reaction to slow down
What happens if you overmix muffins?
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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.
answer correctly for a brainleist! :)
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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.
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Answer:
I answer this question I think I said the second one
Answer:
yep its the second one
Explanation:
Convert 3.55 moles Nacl to formula units
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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
Which two is it brainliest and 100points:)
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Answer:
b c
Explanation:
Answer:C
Explanation:
How many molecules of excess reactant remain after the reaction is complete?
2 H2 + O2 --> 2 H2O
O 4
O 2
O 6
O 8
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It’s 8 bc I said it was 8 ;)
compare the values of the spin quantum number for two electrons in the same orbital
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what is the total number of electrons found in the valence shell of noble gas in the ground state?
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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:
will mark brainliest please help!!!
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1. C
2. E
3. F
4. D
5. A
Which of the following is a chemical property?
A:
mass
B:
oxidizes in air
C:
boiling point
D:
solubility
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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?
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Answer:
1.Irreversible
2.Physical
3.
The photograph shows one way individuals work together in groups. What
kind of work is shown in the photograph?
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Carbon dioxide consists of a central carbon atom with an oxygen atom on each side. Draw a model of the molecule formed by putting lines between the atoms to represent bonds so that each atom has the correct number of bonds.
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Explanation:
Structure of Carbon dioxide is in the attachment.
Here,
Hybridization of Carbon is sp
Bond angle 180°
Structure = linear
Single bond consists of sigma bond. Double bond consists of one sigma and one pie bonds. Triple bond consists of one sigma and two pie bonds.Answer:
O=C=O
Explanation:
this is all you need
which reaction is faster?why?
Answers
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.