Answer:
Co(cobalt) is the answer
Explanation:
Cobalt is a chemical element with the symbol Co and atomic number 27. Like nickel, cobalt is found in the Earth's crust only in chemically combined form, save for small deposits found in alloys of natural meteoric iron. The free element, produced by reductive smelting, is a hard, lustrous, silver-gray metal.
can someone help me with this
The theory of plate tectonics was, at first, rejected by most scientists. Now most geologists accept that tectonic plates exist and that these tectonic plates can and do move. What is responsible for the change in how scientists think about plate tectonics?
Answer:
The validation of seafloor spreading in the 1950s and 60s
Explanation:
The theory of seafloor spreading was supported by numerous evidence including thermal probes that showed that heat flow over the mid-ocean ridges measured up to four times those measured in general bottom sediments, which are taken as due to the presence of molten Earth material close to the ridge crest
The ridge crest also show signs unusually seismic wave velocities that are considered to be due to microfracturing and thermal expansion from upwelling magma
Which of the following structures are found in eukaryotes, but not prokaryotes?
A) Cytosol
B) Cilia
C) Golgi body
Answer:
B
Explanation:
is silver tarnishing a physical change or a chemical change?
Answer:
chemical
Explanation:
Some bronze objects tarnish to a dark brown color. Chemical properties can be identified by the changes they produce. The change of one substance into another substance is called a A piece of wood burning, an iron fence rusting, and a silver spoon tarnishing are all examples of chemical changes.
True or false. (Pls help)
Answer:
1.) False?
2.) true. sorry english not my first language
how many moles of sulphur are in 53.7 grams of sulphur
Answer:
1.67 mol S
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
53.7 g S
Step 2: Define Conversions
Molar Mass of S - 32.07 g/mol
Step 3: Convert
[tex]53.7 \ g \ S(\frac{1 \ mol \ S}{32.07 \ g \ S} )[/tex] = 1.67466 mol S
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
1.67466 mol S ≈ 1.67 mol S
Which ion has smaller size and why?Mg++ or Na+.
Answer:
Explain your answer. mg2+ would be the smaller ion this is because each ion has the same number of electrons however mg2+ has a greater number of protons and therefore is more charge dense and the outer electrons feel a greater pull from the nucleus.
Hope this helps, have a great day/night, and stay safe!
Compounds are combinations of elements. The combination of those elements is specific to the compound. Some compounds have the exact same elements but in different amounts. Look at C6H12O6, which you hopefully recognize as glucose (think cellular respiration and photosynthesis. But ribose is a 5 carbon sugar and its formula is C5H10O5, which you hopefully recognize (think RNA). They both have the same elements, but have different numbers of each element (sugars all have the 1:2:1 ratio). When you're looking at a formula, it's wise to look for the capital letters. That indicates when a different element is present. For glucose, there's a capital C - carbon, a capital H - hydrogen, and a capital O - oxygen. Behind elements, the subscripts help indicate the number of each element that's present. In glucose, there are 6 carbons, 12 hydrogens, and 6 oxygens. How many carbons, hydrogens, and oxygens does ribose have in its formula?
Question 4 options:
5, 12, 5
1, 2, 1
5, 10, 5
6, 12, 6
Explanation:
Omg How Am I supposed to get the answer tell me what to do
PLEASE HELPPP
A(n) _________is a
group of atom. joined by chemical bonds.
THIS IS SCIENCE NOT CHEMISTRY
Answer; molecule
Explanation:
Question 4
Which best describes a chemical reaction that follows the law of conservation of matter?
А
The reactants have the same mass as the products.
B
The reactants have the same density as the products.
С
The products conserve all physical properties of the reactants.
D
The products conserve all chemical properties of the reactants.
Fill in the coefficients that will balance the following reaction:
PbI4 +
CrCl3 →
PbCl4 +
CrI3
the equation balanced is
3 PbI4 + 4 CrCl3 → 3 PbCl4 + 4 CrI3
Answer:
3,4,3,4
Thank me later!
Explanation:
What types of elements- metals,
nonmetals, or metalloids require
the most energy to remove an
electron?
Why do these elements have a higher ionization energy?
Answer:
Noble gases
Explanation:
The noble gases are non-metals that requires the highest amount of energy to remove an electron from their shells.
The reason for this difficult is that their electronic configuration confers a stable configuration them.
The ionization energy is the energy required to remove the most loosely held electrons in an atom. Due to the special stability of noble gases, it is very difficult to remove electrons from an atom of noble gases.7
Select the correct answer.
Which quantity is a graduated cylinder designed for measuring?
O A. length
ОВ.
mass
O C. temperature
D.
time
O E. volume
why chemical reactions are important to society?
What sport was used to demonstrate Newton's 3 Laws?
Someone help me please i’ll give brainly
Answer:
Ionization
Melting
Vaporization
Explanation:
▶Ioniztion changes the charge of an electron, this usually happens between a chemical reaction. It takes a small amount of energy. Most of the time energy is absorbed instead of expelled!
▶ Melting changes the shape of the item and takes about 334 Joules/gram of energy.
▶ Vaporization changes the state of matter that the item is in and requires 2260 Joules/gram.
Brainliest is much appreciated! Hope I helped!
is this correct? and can you tell me yes or no for each one thanks
Answer: Yes it's correct.
Explanation: i hoped that helped!!
Answer:
yes this is correctly done
What type of reaction would NI3+ ->lead to?
Answer:
Reduction potential (Eo) is defined as a tendency of a chemical species to be reduced by gaining an electron and is defined with electrochemical reference of hydrogen, which is globally given the reduction potential of zero [24].
Explanation:
How you find a unknown element (just with the atomic emission spectrum)
What does it mean when a compound is 'soluble in water?
A. It does not dissolve in water.
OB. It dissolves in water.
O C. It forms a precipitate in water.
O D. It has water molecules attached to it.
B. It dissolves in water.
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Answer:
B it dissolves in water
Explanation:
Their molecules bond to water molecules
What kind of molecule can experience hydrogen bonding?
A. A nonpolar molecule containing a hydrogen atom
B. A molecule with hydrogen bonded to any nonmetal
C. A molecule with hydrogen bonded to O, N, or F
D. Any polar molecule containing a hydrogen atom
Answer:
Answer is C
Explanation:
C - A molecule with hydrogen bonded to O, N, or F
A molecule with hydrogen bonded to O, N, or F can experience hydrogen bonding. Therefore, the correct option is option C.
A hydrogen atom is attracted to another electronegative atom in a neighbouring molecule when it is connected to a strongly electronegative atom (O, N, or F). This attraction is more powerful than the usual dipole-dipole interactions between polar molecules.
The enormous electronegativity differential between hydrogen and the highly electronegative atom causes hydrogen bonding. The electronegative atom attracts the shared electrons in the covalent link, causing the hydrogen atom to gain a partial positive charge.
To know more about hydrogen bonding, here:
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_________feedback is a type of feedback in which a system is triggered to produce an output.
Answer:
positive
Explanation:
Answer:
Positive feedback is a type of feedback in which a system is triggered to produce an output.
Explanation:
Have a great rest of your day
#TheWizzer
Which procedure is an attempt to correct a genetic disorder by replacing a mutated gene with a normal allele?
selective breeding
cloning
artificial selection
gene therapy
Answer:
Hi, the answer is C. Artificial Selection
I know this becasue I just finished my test
Explanation:
6. There are three isotopes of silicon. They have mass numbers of 28, 29 and 30. The average atomic mass of silicon is 28.086amu. What does this say about the relative abundances of the three isotopes?
Answer:
That means that the isotope that has a mass number of 28 is probably the most abundant. This is because your average atomic mass is 28.086 amu, which is closest to 28.
Formula used to calculate average atomic mass follows:
average atomic mass=(atomic mass of an isotope)*(fractional abundance)
we are given=
Three isotopes of Silicon, which are Si-28, Si-29 and Si-30.
Average atomic mass of silicon = 28.086 amu
As, the average atomic mass of silicon is closer to the mass of Si-28 isotope. This means that the relative abundance of this isotope is the highest as compared to the other two isotopes.
Percentage abundance of Si-28 isotope = 92.2%
Percentage abundance of Si-29 isotope = 4.7 %
Percentage abundance of Si-30 isotope = 3.1%
Hence, the abundance of Si-28 isotope is the highest as compared to the other isotopes.
What were some dangers associated with early ballon flights?
Explanation:
The dangers of ballooning were apparent to aeronauts and the general public. From the early 1800s, attempts to fly over water too often ended in disaster or a narrow escape. Some of the best known aeronauts on both sides of the Atlantic set off across a large body of water never to be seen again.
A teacher showed this animal to students on a field trip which tool will allow the students to best see the animal up close
Answer:
Magnify glass
What is the overall charge of the compound, NaF?
+2
-2
-1
0
Answer: -1
Explanation: It is neutral because the Na and F atoms are transferring their valence electrons in order to become stable. This results in an overall stable atom. If we were to identify the individual charges of verbalized atoms, Na would have a positive charge, and F a negative charge - both of 1.
It's not -1.
the answer is (0), hope this helped
Which of the following is an example of Newton’s 2nd Law? A. A bowling ball requires more force to roll than a tennis ball B. Sitting in a chair C. A rocket blasting off D. All of the above
Answer:
The answer is A.
Explanation:
Hi can someone help me answer this!
Which option is an Ionic Compound
A.LiCl
B.CO
C.No2
D.So3
Answer:
LiCI
Explanation:
CO and No2 are both covalent compounds and it was a 50 50 and I guessed the right answer.
The one that is an ionic compound is LiCl. The correct option is A.
What are ionic compounds?
Ionic compounds are those compounds that have one negative and one positive charge molecule. When this negative and positive charge joins together, the compound becomes neutral. Electrostatic force joins these elements.
LiCl is a salt that is formed by the joining of lithium with chloride. Lithium is positively charged and chlorine is negatively charged. One identity of this compound is that it is a neutral salt, so it can be identified as an ionic compound. When they disjoint, they form a crystal-like structure.
An example of an ionic compound is sodium chloride, in which sodium is positive and chloride is negative.
Therefore, the correct option is A. LiCl.
To learn more about ionic compounds, refer to the link:
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