2 Aluminum oxidizes according to the following equation: 4A1 + 302 → 2Al2O,
[a] Powdered Al (0.048 myl) is placed into a container containing 0.030 mol O.. What is the limiting reactant?
[b] How many moles of the excess reoctant remaine?
Answer:
Identify the limiting reactant (limiting reagent) in a given chemical reaction.
Calculate how much product will be produced from the limiting reactant.
Calculate how much reactant(s) remains when the reaction is complete.
Compared to 3.011 × 10²³ atoms of Na, 1.0 mole of Carbon
A. has the same number of atoms
B. has twice as many atoms
C. not enough information
D. has half as many atoms
Compared to 1.0 mole of H₂S (molar mass 334 g/mol), 1.0 mole of NH₃ (molar mass 17g/mol)
A. has half the number of molecules
B. not enough information
C. has twice the number of molecules
D. has the same number of molecules
Thank you!
1. B. has twice as many atoms
2. D. has the same number of molecules
Further explanationThe mole is the number of particles(molecules, atoms, ions) contained in a substance
1 mol = 6.02.10²³ particles
Can be formulated
N=n x No
N = number of particles
n = mol
No = Avogadro's = 6.02.10²³
1.
3.011 × 10²³ atoms of Na, 1.0 mole of Carbon
1 mole Carbon = 6.02.10²³ atoms, so 1 mole of Carbon B. has twice as many atoms of Na
2.
1.0 mole of H₂S (molar mass 334 g/mol), 1.0 mole of NH₃ (molar mass 17g/mol)
Both have the same number of moles, so they have the same number of molecules
1.0 mole of NH₃ D. has the same number of molecules as 1.0 mole of H₂S
What mass of Sodium Iodide (NaI) will react with 7.82 grams of Chlorine (Cl2)? 2NaI + Cl2 -------------> 2NaCl + I2
Answer:
16.49g
Explanation:
Given parameters:
Mass of Chlorine gas = 7.82g
Unknown:
Mass of NaI = ?
Solution:
The reaction equation is given as:
2NaI + Cl₂ → 2NaCl + I₂
To solve this problem, find the number of moles of the known specie first;
Number of moles of Cl₂ = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of Cl₂ = 2(35.5) = 71g/mol
Number of moles = [tex]\frac{7.82}{71}[/tex] = 0.11mole
From the balanced reaction equation;
2 mole of Cl₂ will react with 2 mole of NaI
0.11 mole of Cl₂ will also react with 0.11mole of NaI
Mass of NaI = number of moles x molar mass
Molar mass of NaI = 23 + 126.9 = 149.9g/mol
Mass of NaI = 0.11 x 149.9 = 16.49g
What type of atom is hydrogen
Answer:
Protium
Explanation:
The hydrogen atom is the simplest of all atoms: it consists of a single proton and a single electron. In addition to the most common form of the hydrogen atom that is called protium, two other isotopes of hydrogen exist deuterium and tritium.
Answer: Hydrogen is a atom of the chemical element hydrogen.
Explanation:
Please help do in 5 mins This system that breaks down food and absorbs food is called
Answer:
I think its digestive
Explanation:
............
When an oxygen-19 nucleus undergoes beta decay, the nucleus formed is
that of
oxygen-18.
O nitrogen-18.
fluorine-19.
O carbon-14.
If 1 kg of fuel is used in the above fusion reaction (2 1H + 3 1H--> 4 2He+1 0N) , the resulting helium has a mass of 0.993 kg. In other words, 0.007 kg of mass is converted to energy. How much energy is produced by the fusion of 1 kg of hydrogen? (Hint: Use Einstein's equation, E = mc2, where E is energy in Joules, m is mass in kilograms, and c is the speed of light, 3 x 108 m/s.)
Answer:
E--> mc2
E--> 0.007 x (3x108)2
E--> 6.3 x 1014J
Explanation:
What is formed when atoms of elements combine?
O Compounds
O Electrons
O Protons
O Neutrons
Answer:
compounds , because they're combined
Answer:
The answer is A.) Compounds
Explanation:
Compounds are when the atoms of elements combine. When combined it creates a compound.
Which of the following is true for a cell that has DNA present inside a nucleus? (5 points)
It must be a part of the oldest known fossils.
It must be a part of a eukaryote.
It must be a part of a bacterium.
It has a nucleoid.
I REALLY NEED THIS RIGHT NOW IF YOU SEE THIS AND NOW THIS PLEAASE HELPPP
Answer:
It must be a part of a eukaryote
Explanation:
Eukaryotic cells are larger than prokaryotic cells and have a “true” nucleus, membrane-bound organelles, and rod-shaped chromosomes. The nucleus houses the cell's DNA and directs the synthesis of proteins and ribosomes.
POINTS AND BRAINIEST ANSWER!!!!
How many valence electrons does oxygen have after bonding?
How many valence electrons does hydrogen have after bonding?
Answer:
hydrgen = i think it is 4
oxygen = i think it is 3
Explanation:
An inherited characteristic of an organism is called a ___________________.
Answer:
fitness. the ability of an organism to survive and reproduce in its environment. adaptation. the inherited characteristic that increases an organism's chance of survival.
An inherited characteristic of an organism is called a heredity.
What do you mean by heredity ?The term heredity refers to the genetic heritage passed down by our biological parents. It is the transmission of traits from one generation to another generation. These traits can be physical, such as eye colour, blood type or a disease, or behavioral.
Heredity is also called biological inheritance, is the exiting of of traits from parents to their offspring either through asexual reproduction or sexual reproduction.
Heredity is a process in which organisms develop characteristics from their parents. These characteristics are called traits. Inheritance is the transmission of information from one generation of individuals to the next.
Thus, An inherited characteristic of an organism is called a heredity.
To learn more about the heredity, follow the link;
https://brainly.com/question/869836
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When 33 g of CaO and 10 g of H2O react, how many grams of calcium hydroxide would you expect to be produced* Explain your answer.
Answer:
Calculate the number of moles of oxygen required to react exactly with 4.30 ... How many moles of NH3 can be made from 2.00 moles of Nz if you have excess Hz? ... 10. How many grams of water are made when 3.00 moles of butanol is combusted? ... If 50.0 g of calcium oxide were produced, how many grams of calcium ...
Answer:
41.44 g
Explanation:
First of all, we must put down the equation of the reaction;
[tex]CaO + H2O ----->Ca(OH)2[/tex]
Number of moles of CaO = 33g/56 g/mol = 0.59 moles
Number of moles of H20 = 10g/18 g/mol = 0.56 moles
Since the reaction is in 1:1 mole ration, H2O is the limiting reactant
Hence;
mass of Ca(OH)2 produced = 0.56 moles * 74 g/mol = 41.44 g
Name two-fluid technologies' that make
use of air.
A gas sample contained in a cylinder equipped with a moveable piston occupied 300.0 mL at a pressure of 2.00 atm. What would be the final pressure if the volume were increased to 500.0 mL at constant temperature?
Answer:
Explanation
hope this helps!
Why are anions negative?
Answer:
An anion has more electrons than protons, consequently giving it a net negative charge .
hope it helps!
In pure metals, the atoms are arranged in orderly _______
and _______
Answer:
Rows and columns.
Explanation:
Each atom gives up some of its electrons to create a kind of sea of these randomly moving charged particles. It's these free-flowing electrons that make metals conductive.
How many molecules are in 252.3 g H2S?
Answer:
4.457 × 10²⁴ molecules H₂S
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
252.3 g H₂S
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of H - 1.01 g/mol
Molar Mass of S - 32.07 g/mol
Molar Mass of H₂S - 2(1.01) + 32.07 = 34.09 g/mol
Step 3: Convert
[tex]252.3 \ g \ H_2S(\frac{1 \ mol \ H_2S}{34.09 \ g \ H_2S} )(\frac{6.022 \cdot 10^{23} \ molecules \ H_2S}{1 \ mol \ H_2S} )[/tex] = 4.45688 × 10²⁴ molecules H₂S
Step 4: Check
We are given 4 sig figs. Follow sig fig rules and round.
4.45688 × 10²⁴ molecules H₂S ≈ 4.457 × 10²⁴ molecules H₂S
Answer:
[tex]\boxed {\boxed {\sf 4.457*10^{24} \ molecules \ H_2S}}[/tex]
Explanation:
First, find the molar mass of H₂S
Use the Periodic Table to find the mass of hydrogen and sulfur.
Hydrogen (H): 1.008 g/mol Sulfur (S): 32.07 g/molTo find the molar mass of H₂S, multiply the molar mass of the elements by the number of atoms of the element.
Hydrogen (2): (2)(1.008 g/mol) =2.016 g/molSulfur (1 atom): (1)(32.07 g/mol)= 32.07 g/molAdd.
2.016 g/mol + 32.07 g/mol =34.086 g/molNext, find the number of moles in the sample (252.3 g) Use the ratio of grams to moles.
[tex]252.3 / g * \frac{1 \ mol \ H_2S}{34.086 \ g }[/tex]
Multiply. The grams will cancel each other out.
[tex]\frac{252.3 / mol }{34.086 \ }=7.40186587 \ mol[/tex]
Finally, found the number of molecules using Avogadro's number (There are 6.022*10²³ molecules in 1 mole).
[tex]7.40186587 \ mol \ H_2S*\frac{6.022*10^{23} molecules \ H_2S}{1 \ mol \ H_2S}[/tex]
Multiply. The mole (mol) will cancel each other out.
[tex]7.40186587*{6.022*10^{23}\ molecules \ H_2S} = 4.45740363 *10^{24} \ molecules \ H_2S[/tex]
Round to the correct number of significant figures. The sample had 4 sig figs (2, 5, 2, 3), so round to 4 sig figs.
[tex]4.457*10^{24} \ molecules \ H_2S[/tex]
There are about 4.457 * 10²⁴ molecules of H₂S
If a seed grows well in a very salty environment then that seed has a high salt tolerance.
O True
O False
How are crystals made?
Explanation:
Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.
Answer: Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.
Explanation: Can i have BrainLiest
Two students on opposite sides of a box apply forces to the box. What must be true if the
box does not accelerate?
Answer:
the students are pushing with equal force
Explanation:
Alec saw footage of a landslide on the news. He saw rocks falling from the side of a mountain, with some of them smashing into each other and breaking apart. Alec witnessed
A. erosion and weathering.
B. erosion and compacting.
C. weathering and compacting.
D. weathering and sedimentation.
Answer:
a
Explanation:
A student has 0.75 L of a 5.0 M solution and dilutes it to make 3.5 liters. What’s the molarity of the diluted solution?
1.1 M
2.0 M
1.6 M
.93 M
The molarity of the diluted solution : 1.1 M
Further explanationDilution is the process of adding solvent to get a more dilute solution.
The moles(n) before and after dilution are the same.
Can be formulated :
[tex]\tt n_1=n_2\\\\M_1.V_1=M_2.V_2[/tex]
M₁ = Molarity of the solution before dilution
V₁ = volume of the solution before dilution
M₂ = Molarity of the solution after dilution
V₂ = Molarity volume of the solution after dilution
M₁=5
V₁=0.75
V₂=3.5
[tex]\tt M_2=\dfrac{M_1.V_1}{V_2}\\\\M_2=\dfrac{5\times 0.75}{3.5}\\\\M_2=1.07\approx 1.1[/tex]
How many double bonds are in CO2?
O 1
o 2
O 3
Explanation:
In CO₂ there's 2 double bonds.
Structure:
O=C=O (linear) (180°)
Therefore,
Option C is correct✔
What is not found on the inside of the eye? optic nerve, cornea, tear ducts, or iris?
Put the following elements in order from largest to smallest atomic radius
Br, Fe, Ga, Ca, Cu
Answer:
Ca-197
Ga-135
Cu-128
Fe-126
Br-114
PLS HELP ANYONE PLS BEGGING AT THIS POINT
What is the mass of 12 moles of tin?
Select one:
O a.118.719
O b. 1409
O c.0.109
O d. 1, 400g
Answer: 12 moles of tin is 1,400 or D
It might also be C
Explanation:one mole of tin is 118.71 so that times 12 is equal 1,424 . Round 1,424 and it is 1,400
PLS HELP ASAP I DONT HAVE TIME ONLY 5 MINUTES AND IM DOING OTHER THINGS HELPP
Answer:
The reactants of photosynthesis are Carbon Dioxide and water. The products are Glucose (or starch/sugar) and Oxygen. The autotroph uses light energy from the sun in order to complete this process. In the formula, the arrow is the light energy.
Explanation:
Answer:
I've inserted an image.
Explanation:
Hope this helps!
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5. Which elements are examples of nonmetals?
a) Sodium, potassium, and calcium
b) Silicon, germanium, and astatine
c) Barium, iron, cobalt
d) Argon, sulfur, oxygen
Answer:
B
Explanation:
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please help does anybody know how to calculate the molar mass of a compound?
How many grams of water (H2O) are there in 2.60 mol of the compound?
Answer:
46.839728 grams of water
Explanation:
1 mole is equal to 1 moles H2O, or 18.01528 grams
18.01528 times 2.6 = 46.839728
There are 46.839728 grams h20 in 2.60 mol of the compound