Answer:
Converting Grams to Moles of an Element and Vice Versa.
We can convert back and forth between grams of an element and moles.
The conversion factor for this is the molar mass of the substance. The molar mass is the ratio giving the number of grams for each one mole of the substance
molar mass is the factor
Grams can be converted to moles and vice versa so the conversion factor which is used for this is molar mass.
How do we convert mass into moles?Mass of any substance will be converted into moles by using the below equation:
n = W/M, where
n = moles
W = given mass
M = molar mass
By using the above formula we can convert the mass of any object to moles and moles to mass.
Hence conversion factor which is used for this is molar mass(M).
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How many electrons will an Oxygen (O) atom gain or lose in forming an ion?
Answer:
two electrons.... oxygen needs two electrons to attain stability
How did modern scientists experiment with Van Goghs paints to determine their chemical reactions?
Answer:
the would test random expirements
Stomata
layer that
on the lower epidermal
move through
1
internal cells packed together to expose the
greatest number to
the
inside the
Chloroplast
where photosynthesis.occurs
PLEASE HELP!!!!
Answer:
dose it give you numbers
Explanation:
Stomata is present on the lower epidermal layer that helps gases to move through. The tissue between the upper and lower epidermis of leaves, called the mesophyll, is perfectly designed to carry out intensive photosynthesis.
What is stomata's function?Since this evolutionary development is so crucial to plant identity, almost all terrestrial plants use the same pores, known as stomata, to absorb carbon dioxide and release oxygen.
Stomata are microscopic openings that are crucial for photosynthesis. They swarm and are plentiful on the plants' surface.
The reason for this high concentration is that they have a lot of chloroplasts, which are the locations for photosynthesis.
Chloroplasts provide oxygen and create energy through photosynthesis to assist plant growth and crop output.
Thus, the mesophyll cells of the leaf contain many of chloroplasts. The tissue between the upper and lower epidermis of leaves, called the mesophyll, is perfectly designed to carry out intensive photosynthesis.
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Balance the following chemical equation: CH4+ Cl2 → CCl4+ HCI
Explanation:
CH4+8/2Cl2—>CCl4+4HCl
that is,1molecule of methane+8/2 molecules of dichlorine—>1molecule of carbon tetrachloride+4molecules of hydrogen chloride
calculate the molar mass of iron oxide
Explanation:
The molar mass of iron oxide is 159.7 ghope it helps you
write the neutralization equations that take place in the stomach with the bases present in the antacid product
Answer:
See explanation.
Explanation:
Hello!
In this case, since the antacid is usually composed by the following bases:
- Calcium, magnesium and aluminum hydroxides.
- Hydrogen sodium carbonate.
- Sodium carbonate.
In such a way, the feasible reactions that undergo when they react with the stomach acid are shown on the attached picture. As you can see, they all have in common the formation of chlorides and water, which are the neutralization products that calm down the acidity as they are neutral.
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Which of these factors are biotic? (SELECT ALL THAT APPLY.)
animals
light
minerals
water
plants
Answer:
plants
Explanation:
because it produces ( i am a third grade student and don't know if it is right or not)
3) Tears are produced by the lacrimal glands located:
A) above the lateral canthus of each eye
B) below the medial canthus of each eye
C) below the lateral canthus of each eye
D) above the medial canthus of each eye
E) behind the nasal bones
please help thank u appreciate it
Answer:
option B
hope it helps! please mark me brainliest
1.7 x 10 cm= significant figures
Answer:
its 2
Explanation:
The compound cobalt(II) bromide is a strong electrolyte. Write the transformation that occurs when solid cobalt(II) bromide dissolved in water. Be sure to specify states such as (aq) or (s).
Answer and Explanation:
The chemical formula for cobalt(II) bromide is CoBr₂. As it is a strong electrolyte, it dissociates into ions when dissolved in water, according to the following chemical equation:
CoBr₂(s) → Co²⁺(aq) + 2 Br⁻(aq)
Thus, the compound CoBr₂ dissociates in water producing 1 mole of cobalt(II) ions (Co²⁺) and 2 moles of bromide ions (Br⁻) per mole of CoBr₂. The ions are dissolved in water, so they are in the aqueous state (aq).
Find the molar mass of C3H60
Answer:
The molar mass and molecular weight of C3H6O is 58.0791.
Explanation:
CALCULATOR
COLOR THEME
D) SPEAK OPTIONS
ZOOM
Do) 17. A compound containins 27.3 grams of carbon and 72.7 grams of oxygen. Which
of the following is a possible molecular formula?
D
CLE
Answer: The possible molecular formula will be [tex]CO_2[/tex]
Explanation:
Mass of C= 27.3 g
Mass of O = 72.7 g
Step 1 : convert given masses into moles.
Moles of C =[tex]\frac{\text{ given mass of C}}{\text{ molar mass of C}}= \frac{27.3g}{12g/mole}=2.275moles[/tex]
Moles of O =[tex]\frac{\text{ given mass of O}}{\text{ molar mass of O}}= \frac{72.7g}{16g/mole}=4.544moles[/tex]
Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.
For C = [tex]\frac{2.275}{2.275}=1[/tex]
For O =[tex]\frac{4.544}{2.275}=2[/tex]
The ratio of C : O = 1: 2
Hence the empirical formula is [tex]CO_2[/tex]
The possible molecular formula will be=[tex]n\times CO_2[/tex]
Compare the orbital notations of the substances investigated in this experiment with their attraction to the magnet. What unique feature in the orbital notation could be used to predict an attraction to a magnet
Answer:
Number of unpaired electrons
Explanation:
We know that for the compounds listed, the nature of the electrons in the d orbitals affects their interaction with an applied magnetic field.
If there are unpaired d electrons present, the compound is paramagnetic and is more strongly attracted to a magnetic field.
Similarly, if there are paired d electrons, the compound is diamagnetic and is less strongly attracted to a magnetic field.
How many moles are 3.21×10^28 molecules of N2?
Answer:5 to the 7th power
Explanation:
Divided 7 and y then add 4
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 5.33×10²⁴moles are in 3.21×10²⁸ molecules of Nitrogen.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity of amount of substance. It measure the number of elementary entities of a given substance that are present in a given sample.
Given number of molecules of nitrogen=3.21×10²⁸ atoms
we know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number
mole of nitrogen=given number of atoms ÷ 6.022×10²³(Avogadro number)
Substituting the values
moles of nitrogen=3.21×10²⁸ ÷ 6.022×10²³
mole of nitrogen= 5.33×10²⁴moles
Therefore, 5.33×10²⁴moles are in 3.21×10²⁸ molecules of Nitrogen.
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Which of the following is the conjugate base of HSO3-?
A. H2SO3
B. SO2
C. S032
D. HSO3+
An acid and a base which differ from each other by a proton are said to form a conjugate pair. The conjugate base of HSO₃⁻ is SO₃²⁻. The correct option is C.
What is a conjugate base?The entity produced when an acid gives up a proton has a tendency to regain the proton and hence it behaves as a base. It is called the conjugate base of the parent acid.
The entity produced when a base accepts a proton has a tendency to donate the proton and hence behaves as an acid. It is called the conjugate acid of the parent base.
Sulfur dioxide dissolved in water gives sulfurous acid H₂SO₃. The conjugate base of this material contains one proton less i.e, HSO₃⁻ and the conjugate base of the substance bisulfite is SO₃²⁻which is sulfite ion.
Thus the correct option is C.
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How are molecules built?
Bonding
Atomic Rays
Phase Changes
All of these
Which has a bigger surface area, powder or marble chips
Answer:
powder
Explanation:
Between the powder and marble chips, the powder will have a larger surface area.
For the same masses of a solid substance in different forms such as lump, granules or powder, the smaller particle size of each form the larger the surface area.
Surface area increases from lumps to granules and them powder
A powder has the largest surface area and hence undergoes a more faster chemical reaction.which an element that exist into two form
Answer:
Sulphur
Explanation
Rhombic and monoclinic sulphur are its allotropic forms
I will give Branliest! This is a breakoutedu thing and I can't figure this out for the life of me! Please help!
Answer:
I THINK ITS 9.8.0.6.6Explanation:
I HOPE IT HELPS :)
What is the temperature if 2L of 3moles HCl react with 2atm?
Answer:
[tex]T=16K=-256.8\°C[/tex]
Explanation:
Hello!
In this case, according to the gas laws, we would be able to assume HCl can be modeled as an ideal gas for this calculation purpose; in such a way, we use the following equation to compute the temperature:
[tex]PV=nRT\\\\T=\frac{PV}{nR}[/tex]
In such a way, we plug in moles, volume and pressure to obtain:
[tex]T=\frac{2atm*2L}{3mol*0.08206\frac{atm*L}{mol*K}}\\\\T=16K=-256.8\°C[/tex]
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A certain ore is 37.3 % nickel by mass. How many kilograms of this ore would you need to dig up to have 65.0 g of nickel
Answer:
0.174kg of Ore are required
Explanation:
The ore of 37.3% in nickel by mass means that in 100g of ore there are 37.3g of nickel. As we need to obtain 65g of nickel we can convert this mass to mass of ore using the conversion factor (100g Ore / 37.3g Nickel) as follows:
65g of nickel * (100g Ore / 37.3g Nickel) = 174g of Ore are needed to have 65.0g of nickel. In kilograms:
174g Ore * (1kg / 1000g) =
0.174kg of Ore are requiredPLS HELP ASAP THIS IS DUE TODAY
Answer: what grade are u in ill help
Explanation:
___C3H8 + ___O2 --> ___H2O + ___CO2
Answer:
C3H8 + 5O2 ‐‐‐‐‐‐‐‐> 4H2O + 3CO2
A solution with a pH value between 1 and 6
Answer:
One possible answer could be lemon juice
Explanation:
We had to do a water test, and I was looking up what pH levels were. Then I learned about it in school, so I know a thing or two about it :)
Possible other answers include stomach acid and cola.
Hope this helps!!
In a chemical formula, the number of each type of atom in the compound is shown by numbers called what?
Answer: Subscripts
Explanation: Those are the little numbers next to each atom in a chemical formula.
What is the number of electrons in an atom that has 26 protons and 30 neutrons?
Answer:
26
Explanation:
The number of electrons and protons are equal.
What makes this inauguration different from the past?
Answer:
there's just a lot of drama around grumpy trumpy's StOlEN eLecTiOn which are all just fake claims. all his hardcore followers are brainwashed into believing anything he says, so people (especially people who are inside the capitol) fear that trump's followers might incite violence AGAIN even after they broke into the Capitol on the 6th.
That's why they have the National Guard and thousands of people to keep the building secure during Biden's Inauguration.
hope this helps!
Which electron configuration is impossible?
a. ls22s22p2d2
b. 1s22s22p63s23p64s
c. 1s22s22p63s23p3
d. 1s22s22p63s2
e. 1s22s22p63s23s54s
1
Answer:
MP hippopotamus
Explanation: I'm in the fifth grade so yeah I really don't know this so I'm just going to say some random stuff and white cheddar mac and cheese warm TV perfect back MD 11443 to 2885 eleven 12:20 to 11 132 0.24 answer
Which reaction is the opposite of a decomposition reaction?
Question 3 options:
Electrolysis of Water
Synthesis
Combustion
Explosion
Answer:
B) Synthesis reaction
Explanation:
synthesis reactions because they take apart larger molecules or compounds
Hope that helps