Answer:
To back up any statements I make.
To refute any errors presented.
Explanation:
During a group discussion, you look at your notes to point out an error or when you want to flesh out a point you made.
What is a group discussion?The term group discussion has to do with learners talking about a topic in a manner ion which each learner takes a turn to explain a portion of the topic.
During a group discussion, you look at your notes to point out an error or when you want to flesh out a point you made.
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how many liters are in 4x10^23 atoms of CO
Answer:
3.346*10^25
Explanation:
Hope this helps
How did chemists make their proposed model of the sub atomic particles?
Answer:
Because they want to clarify or give solution to the particle that the other didn't know
Explanation:
Correct me if im wrong thanks
True or false: All molecules or atoms in a substance have the same amount of kinetic energy at a given temperature?
Answer:
1
False. if they all moved together at any time then it would be a million things withinthe human species all at once at a high rate
What is the correct formula for sodium carbonate?
a. Na(CO3)2
b. Na,(CO3)2
C. Na2CO3
Naz(CO)2
e. NaCO3
d.
a
a
b
b
ΟΟΟΟΟ
С
С
d
d
е
e
Answer:
na2 co3
Explanation:
sodium carbonate formula
Answer:
your answer is C.
Explanation:
this is what it would be like
O
|
|
Na+ C Na+
/ \
/ \
O- O-
PLEASE HELP!! Is this an element or compound?
copper (ll). oxide (CuO)
Please hurry!!
Answer: Compound
Explanation:
Copper(II) oxide or cupric oxide is the inorganic compound with the formula CuO. A black solid, it is one of the two stable oxides of copper, the other being Cu₂O or copper(I) oxide. As a mineral, it is known as tenorite.
pls help asap!!!!
3 gasses are mixed together (N2, O2, and He). The gauge of the N2 states a pressure of 1.23 atm. The gauge on the O2 tank shows 2.3 atm. The Helium gauge is broken. When the gasses are mixed, the total pressure of the tank is 6.50 atm. What is the pressure of the He?
a) 3.47 atm
b) 2.97 atm
c) 0.435 atm
d) 10.03 atm
Answer: The pressure of the He is 2.97 atm
Explanation:
According to Dalton's law, the total pressure is the sum of individual pressures.
[tex]p_{total}=p_{N_2}+p_{O_2}+p_{He}.[/tex]
Given : [tex]p_{total}[/tex] =total pressure of gases = 6.50 atm
[tex]p_{N_2}[/tex] = partial pressure of Nitrogen = 1.23 atm
[tex]p_{O_2}[/tex] = partial pressure of oxygen = 2.3 atm
[tex]p_{He}[/tex] = partial pressure of Helium = ?
putting in the values we get:
[tex]6.50atm=1.23atm+2.3atm+p_{He}[/tex]
[tex]p_{He}=2.97atm[/tex]
The pressure of the He is 2.97 atm
How many grams of Aluminum are needed to
produce 45.3 grams of Iron metal?
which of the following has more particles
6.02x10(small numbers)23 molecules CO2
9 moles PF2
10 mole NaCI
18 g H2O
Answer:
A mole is Avogadro's number of items: 6.022 × 1023.
Explanation:
in____particles are in contact with each other.
Answer:liquid
Explanation:
The particles in a liquid usually are still touching but there are some spaces between them. The gas particles have big distances between them.
NH₄NO₃ → N₂O + 2H₂O When 45.70 g of NH₄NO₃ decomposes, what mass of each product is formed?
Answer: 25.13 g of [tex]N_2O[/tex] and 20.56 g of [tex]H_2O[/tex] will be produced from 45.70 g of [tex]NH_4NO_3[/tex]
Explanation:
To calculate the moles :
[tex]\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}[/tex]
[tex]\text{Moles of} NH_4NO_3=\frac{45.70g}{80.04g/mol}=0.571moles[/tex]
The balanced chemical equation is:
[tex]NH_4NO_3\rightarrow N_2O+2H_2O[/tex]
According to stoichiometry :
1 mole of [tex]NH_4NO_3[/tex] produce = 1 mole of [tex]N_2O[/tex]
Thus 0.571 moles of [tex]NH_4NO_3[/tex] will require=[tex]\frac{1}{1}\times 0.571=0.571moles[/tex] of [tex]N_2O[/tex]
Mass of [tex]N_2O=moles\times {\text {Molar mass}}=0.571moles\times 44.01g/mol=25.13g[/tex]
1 mole of [tex]NH_4NO_3[/tex] produce = 2 moles of [tex]H_2O[/tex]
Thus 0.571 moles of [tex]NH_4NO_3[/tex] will require=[tex]\frac{2}{1}\times 0.571=1.142moles[/tex] of [tex]H_2O[/tex]
Mass of [tex]H_2O=moles\times {\text {Molar mass}}=1.142moles\times 18g/mol=20.56g[/tex]
Thus 25.13 g of [tex]N_2O[/tex] and 20.56 g of [tex]H_2O[/tex] will be produced from 45.70 g of [tex]NH_4NO_3[/tex]
If ONE mole of rocket fuel, ammonium perchlorate, NH4ClO4, is allowed to react with excess Al so that all of the NH4ClO4 is consumed, how many molecules of water will be produced? (All reactants & products are present in a 1:1 ratio.)
Answer:
9.03×10²³ molecules of H₂O
Explanation:
To solve this, we need to propose the reaction
NH₄ClO₄ → ammonium perchlorate
Al → Aluminum
Those are the reactants; the reaction is:
6NH₄ClO₄ + 10Al → 5Al₂O₃ + 3N₂ + 6HCl + 9H₂O
Then, water is one of the products. If we see the reaction, is a redox type.
Ratio is 6:9. In conclussion:
6 moles of ammonium perchlorate can produce 9 moles of H₂O
Then 1 mol of salt, may produce (1 . 9)/6 = 1.5 moles of water
Let's count the molecules:
1.5 mol . 6.02×10²³ molecules /mol = 9.03×10²³ molecules of H₂O
When 10 grams of water completely evaporate into water vapor, the volume of the water vapor is greater than the volume of the original liquid water, but the mass remains the same. Why does the mass stay the same? Which answer is correct?
A
The temperature of the liquid water and water vapor is the same.
The temperature of the liquid water and water vapor is the same.
B
The density of the liquid water is the same as the density of the water vapor.
The density of the liquid water is the same as the density of the water vapor.
C
The number of atoms in the water vapor is equal to the number of atoms in the liquid water.
The number of atoms in the water vapor is equal to the number of atoms in the liquid water.
D
The distance between the water molecules is the same in the liquid and the vapor.
The distance between the water molecules is the same in the liquid and the vapor.
Answer: I think the answer is B or C, its kind of hard.
As the number of atoms in the water vapor is equal to the number of atoms in the liquid water. Therefore, the mass of the water remains the same.
What is evaporation?Evaporation is a process that usually happens on the surface of water or liquid and it involves the conversion of the liquid phase into the gaseous phase. This process involves a change in the state of matter of water or liquids.
When the water is completely evaporated into water vapor the density of the water vapor is less than the density of the liquid water as the vapors occupy a large volume in comparison to liquid water.
But the number of atoms in the water vapor is the same as the number of atoms in the liquid water. The mass of the water is due to the mass of the atoms.
Therefore, the mass of the water remains the same during the phase transition from liquid water to water vapors. Therefore, option (C) is correct.
Learn more about evaporation, here:
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Calculate the number of moles of NaOH contained in 250. mL of a 0.05M solution.
Answer:
0.0125mol
Explanation:
Molarity (M) = number of moles (n) ÷ volume (V)
n = Molarity × Volume
According to this question, a 0.05M solution contains 250 mL of NaOH. The volume in litres is as follows:
1000mL = 1L
250mL = 250/1000
= 0.250L
n = 0.05 × 0.250
n = 0.0125
The number of moles of NaOH is 0.0125mol.
What is the mass, in amu, of an atom with one proton and two neutrons?
mass of proton mp=1.672621898e-27 kg and 1 amu=1.66053904e-27kg so it’s just divition (1.672621898e-27 / 1.66053904e-27) =1.007276 amu
Answer:
hi
Explanation:
hi
Which type of bonding forms due to electrical attractions between oppositely charged elements
Answer:
Explanation:
Ionic bond
Ionic bond, also called electrovalent bond, type of linkage formed from the electrostatic attraction between oppositely charged ions in a chemical compound.
If 3.22 g of precipitate are recovered from the reaction of limewater (Ca(OH),) with carbon dioxide to produce
water and calcium carbonate, what is the percent yield if 20.0 g of carbon dioxide was mixed with the
limewater?
the correct answer is 7.1% but i don't understand what they did
Answer:
Percent yield = 7.1%
Explanation:
The general reaction of the problem is:
Ca(OH)₂ + CO₂ → H₂O + CaCO₃
To solve this question we need to find theoretical yield using the amount of carbon dioxide added because:
Percent yield = Actual yield (3.22g) / Theoretical yield * 100
Theoretical yield is the maximum amount of product that could be obtained. To find it we need to convert the mass of CO₂ to moles. The moles of CO₂ = Moles of CaCO₃:
Moles CO₂ -Molar mass: 44.01g/mol):
20.0g * (1mol / 44.01g) = 0.454 moles CO₂ = Moles of CaCO₃ produced
Mass CaCO₃ = Theoretical yield -Molar mass: 100.09g/mol-:
0.454 moles * (100.09g / mol) = 45.5g of CaCO₃ = Theoretical yield.
Replacing:
Percent yield = 3.22g / 45.5g * 100
Percent yield = 7.1%what is a salient factor?
Answer:
technology is a silent factor
Explanation:
learned about it in computer class.
PLS HELP URGENT
Electron dot diagrams
Use your periodic table to write the electron dot diagrams for the following atoms.
1. Calcium (Ca)
2. Polonium (Po)
3. Moscovium (Mc)
4. Boron (B)
5. Fluorine (F)
2. Hydrocarbons consist of carbon and hydrogen. 5.7 g of a hydrocarbon contains 4.8 g of carbon.
If the relative molecular mass of the hydrocarbon is 114, determine its molecular formula.
Answer:
The molecular formula of the hydrocarbon compound is C₈H₁₈
Explanation:
The type of chemical substance in the question = Hydrocarbon
The mass of the hydrocarbon = 5.7 g
The mass of carbon in the given hydrocarbon (sample) = 4.8 g
The relative molecular mas of the hydrocarbon = 114 g
Therefore, the mass of hydrogen in the sample, H = 5.7 g - 4.8 g = 0.9 g
The ratio of the mass of carbon in the sample = 4.8/5.7
The ratio of the mass of hydrogen in the sample = 0.9/5.7
By the law of constant composition, we have;
The mass of carbon in a mole of the hydrocarbon = (4.8/5.7) × 114 g = 96 g
The molar mass of carbon, C = 12 g/mol
The number of moles of carbon in a mole of the hydrocarbon, 'n₁', is given as follows;
n₁ = 96 g/12 g = 8 moles
The mass of hydrogen in a mole of the hydrocarbon = (0.9/5.7) × 114 g = 18 g
The molar mass of hydrogen, H ≈ 1 g/mol
The number of moles of hydrogen in a mole of the hydrocarbon, 'n₂', is given as follows;
n₂ = 48 g/1 g = 18 moles
Therefore, in each each molecule of the compound, we have have 8 atoms of carbon, 'C', and 18 atoms of hydrogen, 'H'
Therefore, we get;
The molecular formula of the hydrocarbon compound is C₈H₁₈ which is the chemical formula for the hydrocarbon also known as octane
Is the reaction above a replacement reaction? Explain.
Which condition would cause an increase in the salinity of ocean water?
thawing of glaciers
high rates of evaporation
cold weather
a river flowing into the sea
Answer:
high rates of evaporation
what the steps of Cellular Respiration in the correct order?
Answer:
Cellular respiration uses energy in glucose to make ATP. Aerobic (''oxygen-using”) respiration occurs in three stages: glycolysis, the Krebs cycle, and electron transport. In glycolysis, glucose is split into two molecules of pyruvate. This results in a net gain of two ATP molecules.
What do we know about the arrangement of atoms during a chemical reaction?
Answer: In a chemical reaction, the atoms and molecules that interact with each other are called reactants. ... No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
Explanation:
Answer: In a chemical reaction, the atoms and molecules that interact with each other are called reactants. ... No new atoms are created, and no atoms are destroyed. In a chemical reaction, reactants contact each other, bonds between atoms in the reactants are broken, and atoms rearrange and form new bonds to make the products.
Explanation: Hope this helped! :)
Pleaseeee someoneee helppp meee
Answer:
provisioning
Explanation:
this is a product obtained from an ecosystem which would be provision.
Suppose you a 2 of 10M solution and poured 4 liters of water into it. What would be the new concentration of the solution?
Explanation:
tgfghhuigyhjgguigutyjiouuluuirtugyirechjgAnswer:
3.33M
Explanation:
M1V1=M2V2
M1 = 10M
V1=2L
V2=6L
M2 = M1V1/V2 = 10x 2/6 = 3.33 M
Can you bond 2 silicon atoms (Si) together to form a complete (real) molecule? Explain your reasoning
Answer: no
Explanation: because silicon cannot share over 3 bonds
C.
A 35.5 g cube of aluminum initially at 48.5° C is submerged into 105.3 g of water at 15.4
What is the final temperature of both substances at thermal equilibrium?
Answer:
The final temperature of both substances at thermal equilibrium is 17.3°C
Explanation:
To calculate the final temperature of both substances at thermal equilibrium -:
First , we calculate the heat of A1 cube as follows -
q= mSΔT
(where q = heat of the cube , m = mass of cube , S= specific heat of cube {0.902j/g°C}, T = Temperature )
Putting the values given in the question ,
[tex]q= 32.5g\times0.902\j/g[/tex]°[tex]C[/tex][tex]\times(T_f-45.8[/tex]°[tex]C)[/tex]
[tex]29.315\times(T_f-45.8)J[/tex]
Now , calculate the heat of water -
q=mSΔT
Putting values from the question ,
[tex]q=105.3g\times4.18j/g[/tex]°[tex]C[/tex][tex]\times (T_f-15.4[/tex]°[tex]C)[/tex]
=[tex]440.154\times(T_f-15.4)J[/tex]
Now ,
Heat lost by water A1= Heat gained by water [negative sign about heat lost]
[tex]-29.315\times(T_f-45.8)J[/tex] [tex]=440.154\times(T_f-15.4)J[/tex]
[tex]\frac{-(T_f-45.8)J}{T_f-15.4)J} =\frac{440.154}{29.315}=15.0[/tex]
[tex]-T_f+45.8[/tex]°[tex]C=15T_f-231.2[/tex]°[tex]C[/tex]
[tex](45.8+231.2)[/tex]°[tex]C[/tex]=[tex]16T_f[/tex]
[tex]16T_f=277.03[/tex]°[tex]C[/tex]
[tex]T_f=\frac{277.03}{16}[/tex] = 17.3°C
Therefore , the final temperature of both substances at thermal equilibrium is 17.3°C
Find Jay's instantaneous speed at 35 minutes.
Find jays instantaneous speed at 35 minutes.
If combining cation A with a +3 charge and anion X with a -3 charge, how would we write the compound?
O AX
O A3X3
O 3AX
Answer: it’s not A3X3
Explanation:
1. AX
For binary ionic compounds (ionic compounds that contain only two types of elements), the compounds are named by writing the name of the cation first followed by the name of the anion.If a cation A carries +3 charge and an anion X carries -3 charge, the compound so formed is AX. Since the charges gets cancelled out.For example: consider aluminum phosphate, aluminum carries +3 charge and phosphate carries -3 charge, the molecular formula for the compound will be AlPO₄.Learn more:
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Which salt is the most common found in ocean water?
magnesium
calcium carbonate
potassium
sodium chloride
Answer:
Sodium chloride
Explanation:
There are several salts in seawater, but the most abundant is ordinary table salt or sodium chloride (NaCl). Sodium chloride, like other salts, dissolves in water into its ions, so this is really a question about which ions are present in the greatest concentration. Sodium chloride dissociates into Na+ and Cl- ions.