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
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
Which series reveals the source of energy for oil? please help ASAP!!! WILL MARK BRAINLEST
oil animals plants sun
oil animals plants chemicals
oil plants animals sun
oil chemicals animals sun
Answer:
B
Explanation:
Oil > Animals > Plants > Chemicals
Calculate how many grams of water needed to dissolve 35.00g KNO, at 50.0°C
Don't forget sigfigs and units
Answer:use of significant figures in calculations in Essential Skills 1 () prior to working this example. A Density is mass per unit volume and is usually reported in grams per cubic understand its identity, he found that carbon dioxide dissolved in water to produce compounds were not generally accepted for more than 50 years.
Explanation:
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.
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:
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:
A local factory has been dumping chemicals into a nearby river that resulted in the death of many aquatic dwelling organisms. This is an interaction between which to spheres?
PLZ HELP ASAP
Answer:
it is c
Explanation:
because it deals with living organisms and with water
If H2O is removed from this reaction, what will happen?
2H2 + 02 32H20
O A. The equilibrium will not change.
B. The reaction will be reactant-favored.
O C. The reactants will react to produce more H20.
D. The product-favored reaction will stop.
Answer:
C. The reactants will react to produce more H2O.
Explanation:
According to Principle of Equilibrium, the reaction would move in such a way to annul any change imposed on a system at equilibrium.
In this question, the change is removing H2O from the reaction system. To counter this change, more H2O has to be produced.
The correct option is;
C. The reactants will react to produce more H2O.
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.
Which of the following is the strongest oxidizing agent?
1.oxygen
2.water
3.dichromate
4.nitrate
Answer:
3,or 4 i think please be right
Answer:
I pretty sure it's dichormate based off my research
1 punto Kelvin, es la unidad de medida de: Intensidad o luminosa O Temperatura termodinámica O Corriente eléctrica O Cantidad de sustancia
Answer:
sorry i donntttt understand make it clear
Write the answer in scientific notation when you multiply 2 x 104 by 3 x 104.
Answer:
6× 10⁸
Explanation:
We need to find the multiplication of 2 x 10⁴ by 3 x 10⁴.
2 x 10⁴ × 3 x 10⁴
= (3 × 2) x 10⁴ x 10⁴
= 6 x 10⁴ x 10⁴
= 6 × 10⁴⁺⁴
= 6× 10⁸
Hence, the required answer is 6× 10⁸.
-Are two atoms of the same element identical?
-Can water stay liquid below zero degrees Celsius?
-Can you light diamond on fire?
-How bad of an alcoholic do you have to be to have your brain affected?
-How can glass be a liquid if it's so hard?
-How do I know if something is an acid so I can avoid eating it?
Answer:
-Are two atoms of the same element identical?
no two atoms of the same element are not identical.as its nature will be different
-Can water stay liquid below zero degrees
Celsius?
no it can not be 0°c as its freezing point is 0°c
-Can you light diamond on fire?
yes I think.its refractive index is high.
y
-How bad of an alcoholic do you have to be to have your brain affected?
it causes pressure on mind .
-How can glass be a liquid if it's so hard?
by heating with silica.
-How do I know if something is an acid so I can avoid eating it?
it gives hydrogen ion when dissolves in water.
Answer:
best friends
who used to help
caring
Please help. Will give brainliest
help in what??????????????????
Helppppp plzzz for 30 points
Answer with Explanation:
This is expirament based Q
1) Bring a magnet near ... the Cobalt will come out of te mixture and get attracted to magnet
2) Disolve it in a solution of ethanol. The Idoine gets dissolve and the other doesnt.
Hope im right!!
Answer:
i am not sure enough for A but i think the ans is in dilute amount
Explanation:
Which of these describes a benefit of nuclear fusion?
A. Nuclear fusion uses less power than nuclear fission.
О
B. Waste products have a longer half-life.
O
C. Control rods must be used to prevent runaway chain reactions.
О
D. Hydrogen is more available than uranium-235.
Answer:
D
Explanation:
just took the quiz
The benefit of the nuclear fusion should be considered when the Hydrogen is more available than uranium-235.
What is nuclear fusion?It is the reaction where two or more atomic nuclei should comprise of one or more distinct atomic nuclei and the subatomic particles. Here the difference in mass that lies between the reactants and products should be considered as the manifested at the time of releastion or the energy absorption.
hence, the option d is correct.
Learn more about fusion here: https://brainly.com/question/9816140?referrer=searchResults
Is Iridium transparent, translucent, or opaque?
Answer:
It's Opaque because it's a Hard Mattel
Explanation:
(⌐■-■)/━☆ﾟ.*･｡ﾟHave A Good Day
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
Using the mole ratio, how many moles of NH3 are produced when 0.60 mol of nitrogen reacts with hydrogen in the equation N2 + 3H2 --> 2NH3?
Answer:
1.2 moles of NH3 are produced
please help i am striggling with science so bad
True or False: A pendulum when started swinging, will swing for ever without stopping unless you stop it. Be sure to explain your answer.
well, yes it will continue to swing but not forever. it will just a long time but eventually stop. the reason is because of the air resistance which will continue to damp the motion until the bob stops
What mass of Barium Nitride can be theoretically produced?
Answer:
151.33 g/mol
Explanation:
TRUST ME -_-
At what temperature would the volume of a gas be equal to 0.796 L, if the gas had a volume of 1180 mL at 417 K? (round to 3 sig figs)
Answer:
281 K
Explanation:
From the question given above, the following data were obtained:
Initial volume (V₁) = 1180 mL
Initial temperature (T₁) = 417 K
Final volume (V₂) = 0.796 L
Final temperature (T₂) =?
Next, we shall convert 0.796 L to millilitres (mL). This can be obtained as follow:
1 L = 1000 mL
Therefore,
0.796 L = 0.796 L × 1000 mL / 1 L
0.796 L = 796 mL
Finally, we shall determine the final temperature as follow:
Initial volume (V₁) = 1180 mL
Initial temperature (T₁) = 417 K
Final volume (V₂) = 796 mL
Final temperature (T₂) =?
V₁/T₁ = V₂/T₂
1180 / 417 = 796/T₂
Cross multiply
1180 × T₂ = 417 × 796
1180 × T₂ = 331932
Divide both side by 1180
T₂ = 331932 / 1180
T₂ = 281 K
Therefore, the final temperature of the of the gas is 281 K
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.
1. 2KClO3 →2KCl + 3O2 lf 5.0 g of KCIO3 is decomposed,
a. What volume of O2 is produced of STP?
b. How many grams of KCI are produced?
2. H2SO4 + 2NaOH→ H2O + Na2SO4 How many molecules of water are produced if 2.0 g of sodium sulfate are produced in the above reaction?
3. 2AlCl3 →2Al + 3Cl2 lf 10.0 g of aluminum chloride are decomposed, how many grams of Cl2 are produced?
Answer:
Explanation:
Please mark as brainliest the question to much
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
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:
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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
What is the chemical formula for the molecule
represented by the model?
CHO
o C4H₂O₂
O C H2O
O C3H802
Answer: it’s the third one
Explanation:
Which of these is a balanced chemical equation?
2Ca + O2 → 2Cao
Ca + 04 >Cao
Ca + 202 → 2Cao
2Ca + 02 >Ca0