Answer:
2.44 L
Explanation:
Step 1: Write the balanced equation
2 Ca + O₂ ⇒ 2 CaO
Step 2: Calculate the mass of O₂ required to form 11.2 g of CaO
The molar mass of O₂ is 32 g/mol and in the balanced reaction, there is 1 mole of O₂, that is, 1 mol × 32 g/mol = 32 g.
The molar mass of CaO is 56 g/mol and in the balanced reaction, there are 2 moles of CaO, that is, 2 mol × 56 g/mol = 112 g.
11.2 g CaO × 32 g O₂/112 g CaO = 3.2 g O₂
Step 3: Calculate the volume occupied by 3.2 g of O₂
Under the conditions of the task, 32 g of O₂ occupy 24.4 L.
3.2 g × 24.4 L/32 g = 2.44 L
A neutral atom with the electron configuration 2-7 would most likely form a bond with an atom having the configuration
Answer:
1s2 2s2
Explanation:
What happens in a chemical reaction?
А
Substances change in appearance but not in chemical composition.
B
Substances change from solid to liquid or gas.
с
Substances interact to form one or more new substances.
D
New atoms are created or destroyed.
Answer:
c seems like the best answer
What do all atoms of the same element have in common?
А. atomic mass
B. mass number
C. number of neutrons
D. atomic number
q = (100g) (4.184 J/g°C) (40-26) degrees C. Show how you solved for q (in Joules) here:
Answer:
5857.6 J
Explanation:
Everything is in the correct units so solve normally
q= 100*4.184*14
q= 418.4*14
q= 5857.6 J
What types of medium(s) can sound travel
through?
solids
liquids
all of them
gasses
Explanation:
Of the three mediums (gas, liquid, and solid) sound waves travel the slowest through gases, faster through liquids, and fastest through solids. Temperature also affects the speed of sound. Gases: The speed of sound depends upon the properties of the medium it is passing through.
Answer:
all of them
Explanation:
As talking about sound,all of them are responsible for this.Sound can travel in three mediums but if differs according to speed as it travels fastest in solid,faster in liquid and slow in gases.
hope it helps u and keep smiling :)
Pls just help me out the vid is 6 Chemical Reactions That Changed History; need help on no.6. I DON’T EVEN KNOW HOW TO SOLVE IT
Explanation:
HCL you can do it yourself .try again
Energy is generally released when fuel is burn with oxygen. Predict the disadvantages of burning fuels especially hydrocarbons like petrol, diesel, to the environment.
help me please:(
Answer:
It adds waste and also removes valuable recources that can't be naturally renewed. It also releases toxins and gas...
Explanation:
I don't reallly have an explenation so...
Students in a robotics class designed cars to race as their end of the year project. Students collected data on their cars and compared their individual data before the final race. The mass and the force applied to each car is recorded in the table below. Based on this information which car has the greatest acceleration? *
please helpp!! i appreciate anythinggg
I know number 1 is 58.04 g/mol
Please solve I will give brainliest to correct answer
Answer:
-846 kJ
Explanation:
Using Henderson Hasselbach's law,
2Al + 3/2 O2 -> Al2O3 H = -1670 kJ
-(2Fe + 3/2 O2 -> Fe2O3) = Fe2O3 -> 2Fe + 3/2 O2 H = 824 kJ
-1670 kJ + 824kJ = -846 kJ
When do we observe more than one broad band in the fluorescence spectrum?
What is the difference between gases and nonmetal?
Answer:
1) some of the gas maybe metal but non metal directly refers it self to not begin metal
2) gases are present in only air . non metals are available in solid form too
Consider the substances in the reaction: Uranium-235, Krypton-93, and Barium-140. The values of “235”, “93”, and “140” all represent what characteristic of the elements?
Answer:
Relative atomic mass
Explanation:
Perform an atom inventory on (NH4)3P
Answer:
(NH 4) 3P Ionic fu ammonium phosphide 3) Ca 3N 2 Ionic fu calcium nitride 4) Al( NO B) ... If there is a multi-valent metal present, write both the stock and classical name. ... 66 * 10^(23)"atoms of H" The first thing to do here is write the chemical ...
Explanation:
just follow the instructions below.
hope it helps.
#CARRYONLEARNING
please help
How many grams of barium sulfate are present in 250 of 2.0 M BaS04 solution?
Answer: There are 0.5 grams of barium sulfate are present in 250 of 2.0 M [tex]BaSO_{4}[/tex] solution.
Explanation:
Given: Molarity of solution = 2.0 M
Volume of solution = 250 mL
Convert mL int L as follows.
[tex]1 mL = 0.001 L\\250 mL = 250 mL \times \frac{0.001 L}{1 mL}\\= 0.25 L[/tex]
Molarity is the number of moles of solute present in liter of solution. Hence, molarity of the given [tex]BaSO_{4}[/tex] solution is as follows.
[tex]Molarity = \frac{mass}{Volume (in L)}\\2.0 M = \frac{mass}{0.25 L}\\mass = 0.5 g[/tex]
Thus, we can conclude that there are 0.5 grams of barium sulfate are present in 250 of 2.0 M [tex]BaSO_{4}[/tex] solution.
molar mass (NH4)2SO4
Answer:
132.15
Explanation:
Molar mass N = 14.00
Molar mass H = 1.01
Molar mass H4 = 1.01 x 4 = 4.04
Molar mass NH4 = 14.00 + 4.04 = 18.04
Molar mass (NH4)2 = 18.04 x 2 = 36.08
Molar mass S = 32.07
Molar mass O = 16.00
Molar mass O4 = 16.00 x 4 = 64.00
Molar mass SO4 = 32.07 + 64.00 = 96.07
Molar mass (NH4)2SO4 = 36.08 + 96.07 = 132.14
What is the change in temperature when 75 grams of water releases -2657 J of energy? The specific heat of water is 4.18 J/g°C
A solution has a pH of 10.
What is the concentration of hydrogen ions?
how many moles are in 150 grams of MgO?
Answer:
40.3044 grams.
Explanation:
Please mark brainliest
What volume, in milliliters,
Answer:
25.4
Explanation:
PLZ mark me brainlist
How much water needs to be added to 27.00 millilters of 1.500 M LiOH solution to make a 0.02000 M LiOH solution?
Answer:
3000000000000009000000
How many grams of sodium do I need to react with chlorine to make 20g of sodium chloride
Explanation:
Na=23
cl2=35.5×2=71
NaCl=23+35.5=58.5
2Na + Cl2== 2NaCl
2. : 1
20/23=2(x)/71
(71×20)/(23×2)=x
x=30.87g
How many molecules are in 4.67 mols of H2O
Answer:
2.81 × 10²⁴ moleculesExplanation:
The number of molecules can be found by using the formula
N = n × L
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
We have
N = 4.67 × 6.02 × 10²³
We have the final answer as
2.81 × 10²⁴ moleculesHope this helps you
WILL GIVE BRAINLIEST TO BEST ANSWER!
What are some ways to decrease the environmental impact of your fashion?
Answer:
UK stop spending a lot on clothes if u don't wear half of them
What is the mass in grams of 2.00 10 5 atoms of naturally occurring neon
Answer:
2.00X10^5 x 20gNe/6.02x10^23=6.46x10^-18 but books answer is 797.
Explanation:
The mass is grams 2.00 x 10⁵ atoms of naturally occurring neon is 6.70 x 10⁻¹⁸g.
What is neon?Neon is a chemical element in the periodic table. Its atomic number is 10, and it is a Nobel gas. It is a colorless, monatomic, and odorless gas.
Mass is the quantity of matter in a physical body. It can be calculated by the volume and density of the element. The mass can be calculated by the number of atoms.
Given the number of atoms of Ne is 2.00 x 10⁵
The molar mass Ne = 20.18 g/mol
6.022 x 10²³ Ne atoms have a mass of 20.18 g.
The number of atoms is divided by the Avogadro number and the mass of the element.
2.00 x 10⁵ atoms Ne has mass = (2.00*10⁵) / (6.022*10²³) x 20.18 g =
6.70 x 10⁻¹⁸g.
Thus, the mass is grams 2.00 x 10⁵ atoms is 6.70 x 10⁻¹⁸g.
To learn more about neon, refer to the link:
https://brainly.com/question/5605139
#SPJ2
In the graphic,
X represents which element?
40
20
Answer:Ca
Explanation:
Use the image below to help you answer this question: Your friend has a red laser pointer. What would happen to the light coming from the laser pointer if it's wavelength were to increase (decrease its frequency).Single choice. (1 Point)
a The light would shift towards the color blue
b The light would no longer be visible to the human eye
c The light would be brighter
d The light would be less bright
Answer:
the light would be less bright
Explanation:
what class is sodiumtrioxocarbonate(IV) strong or weak base and why?
Answer:
Strong base
Explanation:
Anhydrous sodiumtrioxocarbonate(IV) Na2CO3 and crystalline sodiumtrioxocarbonate(IV) Na2CO3 are two forms of sodiumtrioxocarbonate(IV) Na2CO3. The Solvay process is the most common name for the sodiumtrioxocarbonate(IV) Na2CO3 production process.
Still, as Na2CO3 reacts, it produces CO3. That tends to be a weak acid's conjugate base. As a result of the removal of H+, carbonic acid was formed (Strong Base)
Calculate the temperature needed to increase 268mL of nitrogen gas at
25°C to 824mL.*
Answer:
96.92 K
Explanation:
Applying,
V/T = V'/T'..................... Equation 1
Where V = Initial Volume, T = Initial Temperature, V' = Final Volume, T' = Final Temperature.
Make T the subject of the equation
T = VT'/V'................. Equation 2
From the question,
Given: V = 268 mL, V' = 824 mL, T' = 25°C = (25+273) = 298 K
Substitute these values into equation 2
T = (268×298)/824
T = 96.92 K
Hence the Initial temperature of Nitrogen gas is 96.92 K
A balloon with a volume of 2.0 L is filled with gas at 3 atm. If the pressure is reduced to 1.5 atm without a change in temperature, what would be the new volume of the balloon?