Answer:
88%.
Explanation:
The percentage yield of lead sulfate in this experiment is 88% if 2.53 is divided by 2.85 and multiply by 100. The percentage yield can be calculated when the experimental yield is divided by theoretical yield and then multiply by 100. The percentage yield tells us about the actual yield that is gained in the end of experiment which is lower than theoretical yield.
What is the mass of oxygen in 10 grams of water?
Answer:
The answer is 16.00 amu
Kayla learned that when you play with the Soccket for 30 minutes it gives you 3 hours of light. She thinks that rolling the ball slowly with her baby brother for 30 minutes will give her the same amount of energy as kicking it in a game of soccer for 30 minutes. Do you agree or disagree? State your claim and use evidence from what you've learned about speed and energy to explain your answer.
Answer:
disagree it wont be the same momentum
Explanation:
cuh
If you get a root canal or any other potentially painful procedure done at the dentist's office, he or she will probably inject your gums with a local anesthetic to "numb the pain." Neurons that trigger pain are called nociceptors. They trigger pain in order to alert the body to potentially dangerous stimuli. Most local anesthetics hinder the activity of all local neurons, not just nociceptors, so pain is not the only sensation that goes away temporarily. Because all feeling is gone, you can end up drooling on yourself without knowing it.
Considering this information about local anesthestics, which of the following statements best demonstrates that science is an ongoing process that changes in response to new information and discoveries?
A. There are a variety of local anesthetics being used today, including lidocaine, prilocaine, and mepivacaine.
B. Sir Charles Sherrington, who discovered nociceptors, wrote a book about the nervous system that helped show its role in allowing organisms to adapt to their environments.
C. Unlike a local anesthetic, a general anesthetic causes a person to lose consciousness rather than sensation in one area.
D. Scientists have discovered a way to use a compound found in hot peppers, capsaicin, along with an anesthetic in order to block nociceptors only.
An idea is being proposed. The steps that led to the idea are listed below:
There was a review by the scientific community.
The data collected was observable and measurable.
Opinion and values of all social groups were implemented.
Can this idea be scientific?
A. Yes, because the idea was tested empirically.
B. No, because opinions and social values may lead to bias.
C. Yes, because all steps of the scientific method were followed.
D. No, because the scientific community often favors its peers.
Answer:
No because opinion and social values may lead to bias
Explanation:
I'm smart >:)
B. No, because opinions and social values may lead to bias.
if it's wrong correct me but I'm pretty sure that's right!
Ice cream
Air, Cone:
Heat is :
the system
The kinetic energy is
The potential energy is
:: Surroundings
:: System
.: Entering
:: Exiting
.: Increasing
:: Decreasing
Answer:
icecream-decreasing
air,cone-surounding
heat is -entering-the system
the potential energy-increasing
What is the chemical equation of a covalent bond
Answer:
In my knowledge of chemistry, I believe there isn't chemical equation for covalent bond. There is only covalent formula
Explanation:
A solid has a fixed ___________________ and a fixed ____________
Answer:
Shape and volume
hope this helps
have a good day :)
Explanation:
How do you study things you cannot see
Answer:
For things that we can not directly observe, we can use indirect observation – which studies the consequences of an action or process. For example, we cannot see the Earth's magnetic field, but we detect it by its effect on a compass.
please help me with n5 ty
and don’t waste my time if you don’t know the answer please
Thanks:)
which of the following acts as a catalyst in catalytic converters?
A. Wood
B. Metal
C. Water
D. Gas
Answer:
B. Metal
Explanation:
The catalyst used in the converter is mostly a precious metal such as platinum, palladium and rhodium. Platinum is used as a reduction catalyst and as an oxidation catalyst. Although platinum is a very active catalyst and widely used, it is very expensive and not suitable for all applications.
Hope it helps plz mark brainlist :)
Explain why the Cell A (nerve cell) and Cell B (red blood cell) cannot switch jobs
Which characteristics of flower petals help an angiosperm reproduce? (Select all that apply.)
Answer:
attractive smell and bright colours
How has the atom changed since Rutherford’s Early Atomic Model?
Answer:
the atom has changed in many ways, we have found sizes, masses, electrons, neutrons, and more.
Explanation:
someone help ,, I'll give brainliest lolll .
Answer:
#2
Explanation:
Corrosion is a natural process that converts a refined metal into a more chemically stable form . It is the gradual destruction of materials by chemical
Why is it not advisable to light a charcoal stove in limited supply of oxygen.
Answer:
Due to the limited supply of oxygen, carbon (ii) oxide, a poisonous gas, is produced instead of carbon(iv) from the burning charcoal stove and this may result in death when inhaled.
Explanation:
When charcoal is burnt in a plentiful supply of oxygen, the combustion products is carbon (iv) oxide (carbon dioxide) which is not very toxic to the human body. The equation of the reaction is given below:
C + O₂ ----> CO₂
However, in a limited supply of oxygen gas, the combustion product is carbon (ii) oxide. The equation of the reaction is given below:
2C + O₂ ----> 2CO
Carbon (ii) oxide is a colorless and odorless gas which unlike carbon (iv) oxide is very toxic to human and results in fatality when inhaled in even small doses for a few minutes. Its mechanism of action of toxicity is that it competes with oxygen for transport in the body by hemoglobin. It combines irreversibly with hemoglobin to form carboxyhemoglobin, thereby depriving tissues and cells the oxygen they need. This results in death of the cells and tissues as well as of the whole organism. Thus, it is not advisable to light a charcoal stove in limited supply of oxygen.
Which plate is the South American plate?
Web
D
O A D
B. A
C. B
В
D C
Answer:
C. B
Explanation:
The correct plate is showing n the green color that is of South America and is a major tectonic plate. The plate belongs to the south American continent and forms the southernmost part of the mid-Atlantic ridge. According to the plate movement, it's still moving to the west away from the Atlantic ridges due to the seafloor spreading. Has The plate has an approx area of 43,600,000 km square.Instructions:
Balance chemical equations on bach side by multiplying the molecular or ionic compounds by a
coefficient.
_C3_H8
+
O2
CO2
H2O
Answer: the answer is b
Explanation:
Answer:
Explanation:
B answer
A tower built of Iron is 500 meter tall. What is the change in height (m) if it is exposed to 25 0 Celsius during summer and at 1.00 Celsius during winter. α iron = 1.2 x 10-5/ Celsius
Answer:
-0.144 m
Explanation:
From the question,
α = Δh/(h₁Δt).................... Equation 1
Where α = coefficient of linear expansivity of iron, Δh = change in height, h₁ = initial height, Δt = change in temperature.
make Δh the subject of the equation
Δh = α(h₁Δt)..................... Equation 2
Given: α = 1.2×10⁻⁵/°C, h₁ = 500 m,
Δt = (t₂-t₁) Where t₂ and t₁ = Final and initial temperature respectively.
Δt = (1-25) = -24 °C
Substitute these values into equation 2
Δh = 1.2×10⁻⁵[500×(-24)]
Δh = 1.2×10⁻⁵(-12000)
Δh = -0.144 m
How many kinds of horses are there in the world? Give me a real number, plz its for a magazine article!
Answer:
784
Explanation:
Answer:
784 horse breeds
if a:b =2:3and b:c=6:10,find a:c.
Answer:
4:10
Explanation:
a:b
2:3
6:10
b:c
The common ratio is b
The lcm of 3 and 6 is 6.
Multiply the first ratio by 2 and the second one by 1
a:b:c
4:6:10
hence a:c = 4:10
What do waves carry from place to place?
A Energy, but not matter
B Energy and matter
C Matter, but not energy
D
Nelther energy nor matter
In context to the question after evaluating every possible fact we conclude that waves carry energy and never carry matter, towards a dignified place to another.
This is considered true concerning all types of waves involving the sound waves, water waves, light waves, radio waves, microwaves, and x-rays. Then the correct answer for the required question is Option A.
Furthermore, there are different and distinguished types of waves. For instance
Mechanical waves: These comprises of waves that require a medium to complete the given course. Instances involve sound waves and water waves.Electromagnetic waves: These consist of wave’s generally don’t require a medium to complete a course . Instances include radio waves, microwaves, and light waves.Matter waves: These involve waves that are associated with particles such as electrons and atoms.To learn more about mechanical waves
https://brainly.com/question/26116832
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Which of the following objects would take you the greatest amount of force to accelerate?
Complete question is;
Which of the following object would take you the greatest amount of force to accelerate.
A) a soccer ball with a mass of 0.5 kg
B) a refrigerator with a mass of 200 kg, C) a bike with a mass of 25 kg
D) a car with a mass of 5,000 kg,
Answer:
D) a car with a mass of 5,000 kg
Explanation:
Formula for force is;
F = ma
Where;
F is force
m is mass
a is acceleration
Now, Force is directly proportional to the acceleration and mass.
Thus, the higher the mass, the greater the force.
Thus, the object that will require the most force is the one that has the highest mass.
Looking at the options, the one with the highest mass is option D.
What is the new volume if a piston starts at 25ml and 900 mm Hg and the pressure decreases to 750 mm Hg?
What is the starting pressure if an inner tube starts at 40L and then the volume decreases to 30L after the pressure is increased to 20 psi
What is the starting temperature if a balloon increases from 50ml to 70ml and the final temperature was 350K?
If a bubble cools from 300K to 200K and the final volume is 18ml, what volume did it start at?
Answer:
I screenshot and expained here
https://screenshot.best/A7QIKV.lnk
Explanation:
how to find molar mass
Answer:
Multiply the element's atomic mass by the number of atoms of that element in the compound. This will give you the relative amount that each element contributes to the compound. For hydrogen chloride, HCl, the molar mass of each element is 1.007 grams per mole for hydrogen and 35.453 grams per mole for chlorine.
In a solution made of baking soda and water, the baking soda is the?
Answer:
solute
Explanation:
water is the solvent and baking soda is the solute and it dissolve in water to make a solution
The melting point of a substance is the same as its _____ point.
evaporation
freezing
boiling
sublimation
Which one do I pick?
Answer:
i would go for the 2nd as far as i know they were a big continent and an earthquake separes them all
What is the oxidation state of S in S2032-?
O A. +3
O B. -2
O C. +4
D. +2
Answer: D.) +2
so the oxidation state of sulfur is +2.
Explanation:
If 5 moles of nitrogen are used how many moles NH3(g) are produced
Answer:
I hope this will help you....and please mark me as Brilliant
Explanation:
1 moles N2 you can produce 2 moles of NH3, (see equation)
5 mol N2 gives 10 mole NH3
molar mass of NH3 = 17.03 g/mole
10 moles NH3 is 10 * 17.03 gram = 170.3 gram NH3.
Balanced equation:
N2(g) + 3 H2(g) → 2 NH3(g)
The balanced equation below shows the products that are formed when butane (C4H10) is combusted.
2C4H10 + 13O2 Right arrow. 8CO2 + 10H2O
What is the mole ratio of butane to carbon dioxide?
2:8
1:5
13:8
13:10
Answer:
2:8
Explanation:
Answer:
2:8
Explanation:
got it right on edge