Balance chemical equation Calcium hydroxide + carbon dioxide = calcium carbonate + water
Answer:
yaeh
Explanation:
a)Ca(OH)
2
+CO
2
⟶CaCO
3
+H
2
O
No. of atoms:Ca−1;O−4;H−2;C−1
b)Zn+AgNO
3
⟶ZnNO
3
+Ag
No. of atoms:Zn−1;Ag−1;N−1;O−3.
How many oxygen molecules are in this compound: H2O
Answer:
1 oxygen molecule is present in H₂O
Explanation:
How to find out?
There's a 2 beside H in H₂O showing that there are '2 atoms of hydrogen'
However there's no number to the right of Oxygen, so it is just 1.
Who is affected over the impacts of overfishing?
Answer:
Overfishing is when people reduce a population by catching too much. The threat goes beyond damage to the ecosystem. It can result in a food crisis and loss of employment for some of around 60 million people who work directly and indirectly in the fishing industry.
do i look phat in this dress?
Answer:
Very!
Explanation:
Very phat!
Transferring charge by touching or rubbing is called-
A) charging by contact
B) convection
C) insulation
D) none of these
Answer:
A) Charging by contact
Explanation:
Transfer of heat by direct contact, Heat energy is conducted from the hotter medium to the cooler medium
Is Iridium transparent, translucent, or opaque?
Answer:
It's Opaque because it's a Hard Mattel
Explanation:
(⌐■-■)/━☆ﾟ.*･｡ﾟHave A Good Day
What is the formula of cell respiration? (In a science equation)
Answer:
Hey mate....
Explanation:
This is ur answer.....
Equation : Cellular Respiration: C6H12O6 + 6O2 → 6CO2 + 6H2O.
Hope it helps u,
Mark me as the brainliest....
FOLLOW ME!!!!
Answer:
C6H12O6 + 6O2 → 6CO2 + 6H2O.
Explanation:
Miniature golf is a game in which players hit a golf ball with a club, which causes the ball to roll along the flat ground. Three golf balls with the same mass were rolling on the ground. Each ball was hit by a golf club, but not from the same direction. All the golf balls changed speed as a result of being hit. Use the information in the diagram to answer.
Which golf ball(s) experienced the strongest force when hit? How do you know?
Answer:
The green golf ball because it changed speed the most.
Explanation:
Hope this helps! :) Plz mark brainliest again! <3
i just need an explanation :) so the problem was " what is the mass of 5 molecules of water(H2O) , in grams?" my teacher said the answer is 1.50 x 10^-22 but i dont understand why. why is it not 1.50 x 10^24, why is the exponent negative?
Answer:
Explanation:
The exponent is negative because water molecules are absolutely tiny. You can't see a molecule of water on the palm of your hand with your naked eyes, right? If a the mass of a molecule was 1.50 x 10^24, it'd be HUGE... like absolutely massive (possible the size of your city). Molecules are just tiny, tiny particles
80 points to whoever ACTUALLY solves ALL 4!!
It has something to do with boyle’s/charle’s/G-L/Combined Gas Laws
I’m super lost and I’ve been working on this for nearly 2 hours!
Answer:
See Explanations
Explanation:
The Empirical Gas Laws include ...
Boyles Law => P₁V₁ = P₂V₂
Charles Law => T₁/V₁ = T₂/V₂
Gay-Lussac's Law => P₁/T₁= P₂/T₂
Avogadro's Law => V₁/n₁ = V₂/n₂
Combined Gas Law => P₁V₁/T₁ = P₂V₂/T₂
Ideal Gas Law => PV = nRT; R = 0.08206 L·Atm/mol·K
One only needs to learn the 'Combined Gas Law' in that it embodies all of the gas law problems.
Start with a simple table for P, V & T and enter given data. If a variable is not given, assume it is constant. Set up P₁V₁/n₁T₁ = P₂V₂/n₂T₂ and substitute given data. Solve for unknown.
Your Problems:
1. P₁ = 1 Atm P₂ = 3 Atm
V₁ = 300ml V₂ = ?
T₁ = Constant T₂ = T₁
n₁ = Constant n₂ = n₁
P₁V₁/n₁T₁ = P₂V₂/n₂T₂
=> (1Atm)(300ml)/(Constant)(Constant) = (3Atm)(V₂)/(Constant)(Constant)
=> (1Atm)(300ml) = (3Atm)V₂
=> V₂ = (1Atm)(300ml)/(3Atm) = 100ml
2. P₁ = 1 Atm P₂ = ?
V₁ = Constant V₂ = V₁
T₁ = 273K T₂ = 82K
n₁ = Constant n₂ = n₁
P₁V₁/n₁T₁ = P₂V₂/n₂T₂
=> (1Atm)(Constant)/(273K)(Constant) = (P₂)(Constant)/(82K)(Constant)
=> (1Atm)/(273K) = (P₂)/(82K)
=> P₂ = (1Atm)(82K)/(273K)
=> P₂ = 0.3 Atm (1 sig-fig)
3. P₁ = 101.25kPa P₂ = 506kPa
V₁ = 5 Liters V₂ = ?
T₁ = Constant T₂ = T₁
n₁ = Constant n₂ = n₁
P₁V₁/n₁T₁ = P₂V₂/n₂T₂
=> (101.25kPa)(5L)/(Constant)(Constant) = (506kPa)(V₂)/(Constant)(Constant)
=> (101.25kPa)(5L) = (506kPa)(V₂)
=> V₂ = (101.25kPa)(5L)/(506kPa)
=> V₂ = 1.00 Liter
4. P₁ = Constant P₂ = P₁
V₁ = 3.2 Liters V₂ = ?
T₁ = 273°C + 273 = 546K T₂ = 400°C + 273 =673K*
n₁ = Constant n₂ = n₁
*Note => be sure to convert all temps to Kelvin when working empirical gas law problems. K = °C + 273
P₁V₁/n₁T₁ = P₂V₂/n₂T₂
=> (Constant)(3.2L)/(Constant)(546K) = (Constant)(V₂)/(Constant)(673K)
=> (3.2L)/(546K) = (V₂)/(673K)
=> V₂ = (3.2L)(673K)/(546K)
=> V₂ = 3.944 Liters ≅ 3.9 Liters (2 sig-figs)
Can you…Balance a chemical equation using the relationships identified?
Answer:
A balanced chemical equation not only describes some of the chemical properties of substances—by showing us what substances react with what other substances to make what products—but also shows numerical relationships between the reactants and the products.
When describing a solution, which of the following statements are true:
A) one substance is dissolved into another C) requires chemical separation
B) heterogeneous D) always involves the combination of a solid with a
liquid. E) All of these descriptions are true
Answer:
E) All of these descriptions are true
Which pair of substances would be easy to separate using distillation?
A. Water and alcohol
B. Suger and salt
C. Oil and water
D. Sand and gravel
Answer: A
Explanation:
Which of the following are decomposition reactions? ch4 (g) + o2 (g) → co2 (g) + h2o (l) cao (s) + co2 (g) → caco3 (s) mg (s) + o2 (g) → mgo (s) pbco3 (s) → pbo (s) + co2 (g)
Answer:
I cant really see the individual problems very well but i hope this helps
Explanation:
Decomposition = one thing -> 2 or more things
Synthesis= 2 or more things -> 1 thing
Silver has a charge of +1.
A 29 gram piece of jewellery made of silver is lefr out on a counter for two weeks. At the end of the two weeks, there is a layer of residue on the jewellery (product), and its mass is 31 grams. Explain this increase in mass.
PLEASE HELP!!!
What is the maximum number of moles of PH 3 that can be formed when 0.2 formed moles of phosphorus reacts with 4 moles of hydrogen to form PH 3? P 4(g) + 6H 2 (g) 4PH 3 (g)
Answer:
The maximum number of moles of PH₃ that can be formed is 0.8 moles.
Explanation:
The balanced reaction is:
P₄ + 6 H₂ → 4 PH₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of each compound participate in the reaction:
P₄: 1 moleH₂: 6 molesPH₃: 4 molesThe limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
To determine the limiting reagent, you can use a simple rule of three as follows: If by stoichiometry of the reaction 6 moles of hydrogen react with 1 mole of phosphorus, 4 moles of hydrogen will react with how many moles of phosphorus?
[tex]moles of phosphorus=\frac{4 moles of hydrogen*1 mole og phosphorus}{6moles of hydrogen}[/tex]
moles of phosphorus= 0.667
But 0.667 moles of phosphorus are not available, 0.2 moles are available. Since you have less moles than you need to react with 4 moles of hydrogen, phosphorus will be the limiting reagent.
Then you can apply the following rule of three: if by stoichiometry 1 mole of P₄ forms 4 moles of PH₃, 0.2 moles of P₄ will form how many moles of PH₃?
[tex]moles of PH_{3} =\frac{0.2 moles of P_{4} *4 moles of PH_{3} }{1 mole of P_{4} }[/tex]
moles of PH₃= 0.8
The maximum number of moles of PH₃ that can be formed is 0.8 moles.
Can someone help me with the first answer ?
Extra points
Explanation:
I'm pretty sure it's; because of the invention of the microscope, scientists were able to work together to develop the cell theory.
A mixture of PCl5(g), PCl3(g), and Cl2(g) is in a 1.00 L reaction vessel. The total pressure of the reaction system is 1.40 atm at equilibrium. Then the volume of the reaction vessel is reduced from 1.00 L to 0.50 L and equilibrium is re-established at constant temperature. What is the total pressure of the system at this point?
Answer:
The total pressure immediately after the volume reduction is 2.8 atmospheres
Explanation:
The question parameters are as follows;
The initial volume of the reaction vessel, V₁ = 1.00 L
The initial pressure of the reaction system, P₁ = 1.40 atm
The final volume of the reaction system, V₂ = 0.50 L
With the assumption that the gas mixture behaves as an ideal gas, and the temperature is constant, by Boyle's law we have;
P₁·V₁ = P₂·V₂
Where;
P₁ = The initial pressure in the reaction vessel
V₁ = The initial volume in the reaction vessel
P₂ = The total final pressure in the reaction vessel after the reduction in the vessel volume
V₂ = The final volume in the reaction vessel
∴ P₂ = P₁·V₁/V₂
From which we have;
P₂ = 1.40 atm × 1.00 L/(0.50 L) = 2.8 atm
The total final pressure in the reaction vessel, P₂ = 2.8 atm.
Which of the following statements is incorrect about atoms?
a. Atoms are electrically neutral
b. Atoms are in possession of same number of electrons and protons
c. The number of electrons is not equal to the number of protons in an ion
d. All atoms can lose or gain electrons to form ions
Answer:
Letter D
Explanation:
#Carry On Learning
The picture below shows xylem and phloem vessels, which are tube-
like structures in a plant's roots and stems. Phloem is adapted for
transporting the glucose made during photosynthesis to the roots and
stems.
Phloem
Xylem } Vascular
stem
τρος
Xylem
Phloem
Which function is xylem specifically adapted to perform in plants?
(7.12A)
A
It helps prevent wer loss
B
It transports water from the roots to the leaves
с
It exchanges gases with the atmosphere
D
It captures sunlight for photosynthesis
Answer:
B
Explanation:
it transports water from roots to the leafs
please help
Differentiate between the three systems of rearing pigs.
this is ur answer
plzzz mark me as brainliest
Describe 2 theories on the origin of the moon
Answer:
According to the text "After the sun spun to light, the planets of the solar system began to form. But it took another hundred million years for Earth's moon to spring into existence. There are three theories as to how our planet's satellite could have been created: the giant impact hypothesis, the co-formation theory and the capture theory."
~Deku
Explanation:
HELP PLEASEEEE!!!!!!!!
Nitrogen (N)) reacts with hydrogen (H) to produce ammonia (NH3). Represent this reaction in terms of:
Particles
b. Moles
C. Mass
Answer:
C the answer is c
Explanation:
ITS C
How many joules of heat are absorbed to raise the temperature of 125 grams of water at 1 atm from 35°C to its boiling point, 100.°C.
Answer:
33962.5 J
Explanation:
From the question given above, the following data were obtained:
Mass (M) = 125 g
Initial temperature (T₁) = 35 °C
Initial temperature (T₂) = 100 °C
Specific heat capacity (C) = 4.18 J/gºC
Heat (Q) absorbed =?
Next, we shall determine the change in temperature. This can be obtained as follow:
Initial temperature (T₁) = 35 °C
Initial temperature (T₂) = 100 °C
Change in temperature (ΔT) =?
ΔT = T₂ – T₁
ΔT = 100 – 35
ΔT = 65 °C
Finally, we shall determine the heat absorbed. This can be obtained as follow:
Mass (M) = 125 g
Change in temperature (ΔT) = 65 °C
Specific heat capacity (C) = 4.18 J/gºC
Heat (Q) absorbed =?
Q = MCΔT
Q = 125 × 4.18 × 65
Q = 33962.5 J
Therefore, the heat absorbed is 33962.5 J
Which molecule has the most atoms?
A. CO2
B. N202
C. CO
D. H₂O S
how many moles of ammonia (NH3) are in 224L at standard pressure?
Answer:
10 moles
Explanation:
(224 L)*(1 mol/22.4 L) = 10 mol
1 mol/22.4 L is the conversion factor under standard temperature and pressure
QUESTION 8
DOK 4
Watch later Share
Imagine that an atom of Fluorine (F) can bond with one
of the following atoms. Which one do you think it is
most likely to bond with? Why?
Lithium (Li)
Beryllium (Be)
Boron (B)
Carbon (C)
For more videos,
check out:
Click to answer
ne
T
www.video
chemistry
textbook.com
Youlube
SAVE DRAFT
SUBMIT
13:22 / 16:52
СС
Answer:
Li
Explanation:
F is a strongest electronegative element and it will combine with an element with low electronegativity. From the list provided, the element is Li.
Balance the equation by putting the correct number in front of each compound. You can work this out mathematically or by drawing pictures on a piece of paper like the videos.
NH3 --> H2 + N2 ammonia dissolving
Answer:
2NH3 --> 3H2 + N2
Explanation:
It's hard to explain how I got these coefficients but I recommend watching Tyler DeWitt on Youttube. He explains tons of chemistry concepts in an easy and clear way. I always watch his videos when I don't understand something.
I would type in "How to balance chemical equation" by Tyler DeWitt
Boiling point of the substance is directly proportional to
Answer:
The boiling point is directly proportional to the surface area which is proportional to the molecular weight.
Explanation:
stoichiometrically when 0.01 kg of CaCO3 is heated to produce CO2, occupied a volume at STP is
a. 2.2414 dm^3
b. 22.414 dm^3
c. 22414 dm^3
d. 224014 dm^3
Answer:
anjsbzhahxbVAbzbsbsbsbsjsjsdp