Answer: A/B
Explanation:
It is most likely formed from igneous rock that was once buried
Answer: a
Explanation:
The horses on a carousel or merry-go-round are accelerating because
See image for question
Answer:
the energy produced as part of the reaction and balancing the equation accounts for the energy produced
how does a lone pair contribute to molecular shape
Answer:
It takes up space like an "invisible" atom.
Explanation:
It's just right dawg.
3. A reaction produces 14.2 grams of a product. The theoretical yield of that product
is 17.1 grams. Which of the statements are true? Select 2 that apply. (1 mark)
A. The percent yield of the product is 14.2%.
B. The percent yield of the product is 17.1%.
C. The percent yield of the product is 83.0%.
D. The percent yield of the product is 120.0%.
E. The actual yield of the product is 14.2 grams.
F. The actual yield of the product is 17.1 grams.
A reaction that produces 14.2 grams of a product and the theoretical yield of that product is 17.1 grams is true for the following statements :
The percent yield of the product is 83.0%
The actual yield of the product is 14.2 grams.
Percentage Yield:Percent yield is the percent ratio of actual yield to the theoretical yield.
Mathematically,
percent yield = actual yield / theoretical yield x 100%
actual yield = 14.2 grams
theoretical yield = 17.1 grams
percentage yield = 14.2 / 17.1 × 100%
percentage yield = 83.0409356725 %
percentage yield = 83.0 %
Therefore,
The percent yield of the product is 83.0%
The actual yield of the product is 14.2 grams.
learn more on percentage yield here; https://brainly.com/question/4180677
What mass of HCL is consumed by the reaction of 5. 0 of magnesium?
!Please answer! Sort the chemical reactions based on whether they absorb or release energy
respiration in cells
producing electric current
photosynthesis
burning a candle
baking bread
activating a cold pack
Answer:
Releases Energy; burning a candle, producing electric current, and respiration in cells.
Absorbs Energy; activating a cold pack, baking bread, and photosynthesis.
Explanation:
Burning a candle releases heat energy into the surrounding area. The respiration process in cells does not produce any energy, so it must release it. Activating a cold pack absorbs energy in order to activate. Baking bread absorbs heat when baking, it releases it when cooling. Photosynthesis absorbs energy at the beginning of the process before releasing/using it.
This is 100% Correct, I checked this by taking the test and attached the image.
Calculate the percentage by mass of lithium in lithium hydroxide.
Answer:
20.1
Explanation:
li/LiOH×100/1
6/6+16+1×100/1
6/23=20.1%
how to convert washing soda into sodium silicate
Answer:
Hope it helps!~ (sorry if you get it wrong or I got it wrong-)
Explanation:
Solutions of sodium silicates can be produced by treating a mixture of silica (usually as quartz sand), caustic soda, and water, with hot steam in a reactor.
~The Confuzzeled homan
PLEASEE HELPPP MEEEEE
Calculate the mass of 3.7 L of CH4 at STP.
Answer:
Explanation:
Molar mass CH4 = 16g/molAt STP , 16g CH4 has volume = 22.4LMass of 3.136 L CH4 = 3.136L/22.4L * 16g = 2.24g
According to the standard temperature and pressure conditions and ideal gas equation, the mass of 3.7 L of CH₄ is 0.026 g.
What are standard temperature and pressure conditions?Standard temperature and pressure are defined as a standard set of conditions required for experimental measurements which are established to allow comparison between different sets of data.
Standards which are commonly used are those International Union of pure and applied chemistry and national institute of standards and technology.These are not universally accepted standards but are the ones which are commonly used.
Standard conditions of pressure and temperature are necessary to define standard reference conditions used to express volumes of liquids and gases.These values are important to physicists, chemists ,engineers ,pilots and navigators.
According to ideal gas equation mass= PV×molar mass/RT on substitution mass= 1×3.7×16/8.314×273=0.026 g.
Learn more about standard temperature and pressure,here:
https://brainly.com/question/29129606
#SPJ7
5 x 10^4 ÷ 2.5 x 10^2 =
a
2 x 10^2
b
12.5 x 10^2
c
.5 x 10^6
d
5 x 10^6
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
[tex] \frac{5 \times {10}^{4} }{2.5 \times {10}^{2} } = 2 \times {10}^{2} \\ [/tex]
So the correct answer is (( a )) .
♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️♥️
Iron has a density of 7.87 g/cm^3. What volume would 12.5 g of iron occupy?
Answer:
The answer is 1.59 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question
mass = 12.5 g
density = 7.87 g/cm³
We have
[tex]volume = \frac{12.5}{7.87} \\ = 1.588310038...[/tex]
We have the final answer as
1.59 cm³Hope this helps you
Laboratory equipment is cleaned and properly stored after use primarily so that -- chemical products can be measured and recorded as data chemical products can be measured and recorded as data time is saved in setting up the next experiment time is saved in setting up the next experiment toxic materials can be kept in the laboratory toxic materials can be kept in the laboratory the possibility of contamination in the laboratory is minimized
Answer:
the possibility of contamination in the laboratory is minimized
Explanation:
When a particular laboratory equipment is used for a given purpose, it can not be used four another purpose until it has been thoroughly washed. This is done in order to avoid contamination when the equipment is subsequently used for a different purpose.
Hence, if a laboratory equipment is not properly cleaned and stored after use, they remain contaminated and give inaccurate results when subsequently used.
Why don't objects warm up at equal speeds/rates?
Define Conductor and Insulator...??
Answer -
Conductor - material which allow electricity to pass through them
Insulator - material which do not allow electricity to pass through them
Hope it helpz~
What is the volume of 4.35 moles of a gas at a pressure of 85.6 kPa and 26.0°C?
Answer:
125,066 litres
Explanation:
Question :-
who invited vaccination?
Answer:
Edward Jenner
Explanation:
In 1796, he tested a vaccine on a boy with cowpox and he became immune to smallpox.
what section do the nonmetals fill in the quantum mechanical model of the atom?
Answer:
Section P
Explanation:
Need help with my work chemistry assignment grade 12 college work please
Answer:
A)0.450 mol N2
B)294 g NH4 NO3
Explanation:Step by step! make sure when you see underneath the multipication eqaution that we are deviding!The arrows is what we are dividing
A)36.0gN H4N O3×1 molN H4NO3×2mol N2
↑ 1 ↑ 80.05gNH4NO3 ↑2mol N H4N O3
B)7.35molH2O×2mol N H4 N O3×80.05gN H4 N O3
↑ 1 ↑ 4molH2O ↑ 1mol N H4N O3
5) 2 and for the how many moles it is 10.9
Hope this helps!
What was the continental drift called before it separated
Answer:
Pangaea
Explanation:
Which physical property is most helpful for separating a mixture of salt dissolved in water?
A Particle density
B Boiling point
C Rate of solution
D Magnetic attraction
Answer:
B. Boiling Point
Explanation:
To separate salt from water, you need to boil it until all the water evaporates, and you will be left with salt.
Answer:
The answer is Boiling point
Explanation:
I got it right on my exam
What is the mass of 4.0 moles of sodium, Na?
– previous question: “how many atoms are present in 4.0mol of sodium?” = 2.4 x 10^24 atoms of Na in 4.0 moles.
need an explanation of how to figure this out (& info on how to do this in other problems as well, thank you) <3
Answer:
91.60 grams
Explanation:
For this specific problem, you are asked to find the weight of an element, when given moles. Other problems could give you a compound. In each case, you need to find the molar mass of the element or compound, that is, the weight (in grams) of 1 mole of the element or compound. Now that you know the molar mass of the element/compound, you can multiply by the amount of moles the equation the equation gives you to find the total weight.
In this problem, you are asked to find the mass of Sodium (Na). First, we need to look on the Periodic Table to find the Atomic Mass of Sodium. If we look, we find this to be 22.990 amu. Side note - when we find molar mass, amu and grams are interchangeable - you'll see here. This 22.990 amu is also the molar mass in GRAMS of 1 mole of sodium. The equation asks us to find the mass of 4 moles of sodium, so now we simply multiply by 4. 22.990 * 4 = 91.60 grams.
In summary, find the molar mass (1 mole) of the substance, by adding the amu's of each element (keeping mind the amount of each). Then, multiply this total number by the amount of moles that is given, and put your answer in moles.
Hope this helps
Assuming no other changes in temperature or volume, what will be the effect on the pressure inside a container of gas if the identity of gas is changed from nitrogen to helium
The pressure will increase if the gas is changed from nitrogen to helium.
Kinetic theory of gasesThe question is incomplete but I will try to help the much I can. We must note that the kinetic energy of the molecules of a gas depends on the temperature and the molar mass of the gas.
Since the average velocity of a gas depends on molar mass also, the pressure will increase if the gas is changed from nitrogen to helium.
Learn more about gases: https://brainly.com/question/1369730
Amphetamine was developed initially as a substitute for a closely-related chemical derived from the Chinese herb ma huang. That chemical is:
Amphetamine was developed initially as a substitute for a closely-related chemical derived from the Chinese herb ma huang. That chemical is Ephedrine.
What is Ephedrine?Ephedrine is a stimulant medication that can be considered an amine chemical compound and substituted amphetamine.
Ephedrine is used in sports to stimulate the central nervous system (C_NS) and as energy supplier.
Ep_hedrine use is prohibited and chronic usage of this substance may have problems the health.
Learn more about Ephedrine here:
https://brainly.com/question/1122074
Plz help! I don't want internet answers plz :D
1. What determines weight?
2. What does Homogeneous mean?
Answer:
Explanation:
number 2 = A mixture that cannot be easily distinguished between the different parts. Distillation is one of the only ways to remove the parts from each other. For example, in a fruit salad you can easily pick things out, but in jello you cannot take the sugar out.
please give me brainilest
number 1. = The density of the bone structure and weight are essentially determined in order to determine the person's bone structure. The bone density measurement involves the size of the wrist. Determining the body frame allows an individual to estimate the best weight.
How does the formation of water from hydrogen and oxygen demonstrate the conservation of mass?
Answer:
Well, the mass of the products is equal to the mass of the reactants.
Explanation:
The law of conservation of mass states that,
For any system closed to all transfers of matter and energy, the mass of the system must remain constant over time, as system's mass cannot change, so quantity cannot be added nor removed.
Taken from here.
Suppose we have the balanced equation of combustion of hydrogen to form water.
The equation will be:
2H2(g)+O2(g)→2H2O(g)
Now, we look at the total mass of the reactants and compare it with the mass of the products.
H2 has a mass of 1⋅2 amu, and so 2H2 will have a mass of 2⋅2=4 amu.
O2 has a mass of 16⋅2=32 amu.
So, the total mass of the reactants (2H2+O2) is equal to 4+32=36 amu.
Now, let's take a look at the mass of the products.
Water has a chemical formula of H2O.
In here, there are two hydrogen atoms and one oxygen atom, and so its mass will be 2+16=18 amu.
There are two water molecules formed, and that means the total mass of the products is 18⋅2=36 amu.
As you can see now, the mass of the products is equal to the total mass of the reactants together, and the chemical equation obeys the law of conservation of mass.
Note that this applies to every balanced chemical equation.
What is the difference between endothermic and exothermic changes?
Which type of change (exothermic or endothermic) is water freezing? Why? What type of matter is made of really hot and super excited (fast-moving) charged particles?
Answer:
An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. An endothermic process absorbs heat and cools the surroundings. The frezing of water is an exothermic process because heat is being removed from the system. In gases the particles move rapidly in all directions, frequently colliding with each other and the side of the container. With an increase in temperature, the particles gain kinetic energy and move faster. Hope this helped! :)
Which deduction about the element astatine can be made from its position in group 7
It forms covalent compounds with sodium.
How many moles are there in 0.150g Cu3S
Answer:
0.150g x 1mol/Molar mass of Cu3S = moles
Explanation:
0.150g x 1 mol/222.70= 0.0006735519 moles
*pls like
What’s the answer?????
potential energy
kinetic energy
kinetic energy
idk last sorry =(
i need help again...