A setup that involves material, a procedure, observations, and data can be found in a a(n)
Answers
Answer:
experiment
Explanation:
that is the answer
Related Questions
How did the development of the earliest idea about atoms differ from the later work of scientists?
A.It was based on sound evidence.
B.There were explanations for the idea.
C.It was based on the thoughts of an early philosopher.
D.There were experiments conducted to support the idea.
Answers
Answer:
C
Explanation:
The early ideas of the atom states that the indivisible object is hollow or is a solid object with nothing inside. The later discoveries or works of the scientists states that inside the atoms are the subatomic particles which are the electrons, protons, and neutrons.
Chemical changes can change which properties of a substance?
Group of answer choices
Reactivity
Color
Malleability
All of the above
Answers
Answer:
» Reactivity and color
Explanation:
though color is very minor answer because it also relates to a physical property.
[tex].[/tex]
How many atoms of each elements are in three molecules
Answers
Answer:
Molecules of compounds have atoms of two or more different elements. For example, water (H2O) has three atoms, two hydrogen (H) atoms and one oxygen (O) atom.
Explanation:
Why does the author include information about bread and sandwich wrappings in the article?
(A) to show that the scientific method is often used to understand things about food
(B) to provide an example of something that can be tested by the scientific method
(C) to demonstrate the problems that can be caused by improper seals and wrappings
(D) to help evaluate how the weight of bread can show how much moisture it has
Answers
Answer:
what is the story about actually.i think it's from ur lesson
Explanation:
certain breads mold easily...(fact)..
especially white bread., when exposed to any moisture, from refrigeration, or freezing..
when taken out of (cold environment), humidity in air causes molding because you take it from cold to/warm environment.
check expiration dates, keep refrigerated, and inspect 4 molding. Companies like WMART, buy in bulk, when on shelf, defrosts,, then has molding within expiration dates..
Distillation can be separated in what technique?
A. Chemical
B. Physical
Answers
Answer:
B. Physical process is the way distillation can be separated.
two example of solid -solid solution
Answers
Answer:
Steel — in steel, there is a solid-solid solution of iron and carbonBrass — in brass, there is a solid-solid solution of zinc and copper.Vapor pressure of any liquid _______. A. increases with increases in temperature B. increases with decreases in temperature C. is not affected by changes in temperature D. increases with increases in volume of the liquid E. None of the Above
Answers
Answer:
increase with increases in temperature
Explanation:
please mark me brainleast
Second ionization energies are always _____ than first ionization energies because the remaining electrons are attracted _____ strongly as the positive charge on the ion increases. A large jump in ionization energies is always observed after the _____ electrons have been removed.
Answers
more
remaining
state two factors that determine the stability of isotope
Answers
measure 25 mL of water in a 50 mL graduated cylinder. pour the 25 mL of water into the 250 mL beaker and record the mass of the beaker + water. Now find the mass of just the water.
Answers
Answer:
so i think mass of water is 235 ml
can someone suggest me topics for chemistry project work?
Answers
Answer:
Which
PLEASE MARK AS BRAINLIEST ANSWER
3.
Alum is used in water treatment as
A. a germicide.
В. a decolourising agent.
C. an antioxidant.
D. a coagulating agent.
Answers
Answer: Alum is used in water treatment as a germicide
Explanation:
A. a germicide
Give one example of neutral oxides which turns colourless liquid at room temperature
Answers
Answer:
mercury
Explanation:
because mercury can get turned into liquid in any normal rrom temperature
To reduce the costs of extracting aluminum, what must be added to it to reduce the melting point?
Answers
Explanation:
To reduce costs, powdered aluminium oxide is dissolved in molten cryolite. This ionic compound melts at a lower temperature than aluminium oxide, reducing costs.
I need Help can someone help
Answers
Answer:
no bueno
Explanation:
The molar mass of C3H8O2 (three significant figures) is ________.
Answers
Answer:
[tex]\boxed {\boxed {\sf 76.1 \ g/mol}}[/tex]
Explanation:
We are asked to find the molar mass of C₃H₈O₂.
The molar mass is the mass of 1 mole of a substance. The values are found on the Periodic Table because they are equivalent to the atomic masses. However, the units are grams per mole instead of atomic mass units.
Look up the molar masses of the individual elements in the compound: carbon, hydrogen, and oxygen.
Carbon (C): 12.011 g/mol Hydrogen (H): 1.008 g/mol Oxygen (O): 15.999 g/molLook at the subscripts in the formula. There is a subscript of 3 after C, another of 8 after H, and another of 2 after O. Therefore, there are 3 moles of carbon, 8 moles of hydrogen, and 2 moles of oxygen in every mole of the compound. Multiply the element's molar mass by the subscript.
C₃: 12.011 * 3 = 36.033 g/molH₈: 1.008 * 8 = 8.064 g/mol O₂: 15.999 *2=31.998 g/mol[tex]36.033 + 8.064 + 31.998 = 76.095 \ g/mol[/tex]
Round to the 3 significant figures. For the number we calculated, that is the tenths place. The 9 in the hundredth place to the right tells us to round the 0 up to a 1.
[tex]76.1 \ g/mol[/tex]
The molar mass of C₃H₈O₂ is approximately 76.1 grams per mole.
Note:-
Approximate Values taken for Atomic masses
Solution:-
[tex]\\ \rm\longmapsto C_3H_8O_2[/tex]
C=12uH=1uO=16u[tex]\\ \rm\longmapsto 3(12u)+8(1u)+2(16u)[/tex]
[tex]\\ \rm\longmapsto 36u+8u+32u[/tex]
[tex]\\ \rm\longmapsto 44u+32u[/tex]
[tex]\\ \rm\longmapsto 76u[/tex]
[tex]\\ \rm\longmapsto \approx76g/mol[/tex]
A pan containing 20.0 grams of water was allowed to cool from a temperature of 95.0 °C. If the amount of heat released is 1,200 joules, what is the approximate final temperature of the water?
75 °C
78 °C
81 °C
87 °C
Answers
Answer:
81 °C
Explanation:
This is a calorimetry question so a few things you will need for this. The calorimetry equation q=mcΔT & the specific heat of water (4.2J/g•°C). Other definitions are:
q = heat added/released by a sample
m = mass of sample
c=specific heat of sample
ΔT = change in temperature
from here we can rearrange the equation to state:
q/(mc) = ΔT
1200J/((20.0g)(4.2J/g•°C)) = ΔT
14°C = ΔT
If the starting temperature was 95.0°C and we know that the temperature was cooled by 14°C then the final temperature of the water would be 81.
Answer:
C. 81 c
Explanation:
took the test :)
In the single replacement reaction between magnesium and HCl what reaction resulted from inserting the lit splint into the test tube mouth ?
Answers
Answer:
Magnesium reacts with dilute hydrochloric acid in a conical flask which is connected to an inverted measuring cylinder in a trough of water. The volume of hydrogen gas produced is measured over a few minutes, and the results are used to plot a graph
Explanation:
Hope it will help you
Answer:
Adding magnesium metal to hydrochloric acid produces hydrogen gas. The magnesium dissolves to form magnesium chloride, MgCl2.
burning. If you observe a gas forming, test for its identity by inserting a glowing wood splint into the mouth of the test tube. ... This is a “glowing splint.” If the splint continues to glow, oxygen gas is present. Do not put the splint into the solution.
hope it's help you....!!!!!!
#rishu
anyone know valency of phosphide and phosphite please tell me and also they are not same .If you know can i get their symbol too please
Answers
i found this. there's more coming up
In a chemical reaction, reactants are the substances that you _________ with and the products are the substances that you _________ with
Answers
Answer:
Start, Finish
Explanation:
Reactants react. Products are the end result.
c. Mention the function of corolla.
Answers
Answer:
Overall, the main function of the corolla is to assist in the reproductive process of the plant. The petals of the corolla are designed to aid in pollination, and therefore, increase the chance of successful reproduction of the flower.
to assist in the reproductive process of the plant...
mention four states of matter and explain and give examples
Answers
Answer:
solid: ice.
liquid: water
gas: methane
plasma: lightning
Explanation:
How would you change the type of atom
Answers
Answer:
Hi, There! :)
If you change the number of protons an atom has, you change the type of element it is. If you change the number of neutrons an atom has, you make an isotope of that element.
Answer:
If you change the number of protons an atom has, you change the type of element it is. If you change the number of neutrons an atom has, you make an isotope of that element. All known elements are arranged on a chart called the Periodic Table of Elements.
Explanation:
that's what I found buddy
10.74cm^3 to liters
Please show a step by step process on how to solve.
Answers
Answer:
I HOPE IT WILL HELP YOU A LOT.
Is it possible to prove that something is real or true of you can’t directly observe it? If no, why not? If yes, how would you do that?
Answers
Answer:
yes
Explanation:
Anything that is verifiable and repeatable is likely to be true. If not verifiable and repeatable, then it may well be completely false, or at least partially false.
This holds for much more than just religious beliefs. What about political thought? One perfect example was when President Obama was pushing his ACA (Obamacare). His facile claim was that with medical coverage for all, the costs of health care would go down. Because people would take better care of themselves, avoiding those major medical bills. But that's just a banality, right? Just words that sound good. I'm not saying that morally, universal health care is wrong. I am saying, don't assume something to be true just because it sounds good. (Of course, health care costs went up, not down.)
Is it true that if you get your car washed every week, it will last longer and cost you less in the long run? Of course not. But it sounds good. People will nod their heads in mindless, lazy agreement. You'll have a cleaner car, you will most likely pay more, and it may last less long, depending on any number of factors. Exactly the same as health care
i got the total but can’t get these ???
Answers
Answer:
Volume of heptane in cylinder = 51.2mL
Volume of water = 33mL
Explanation:
Density(g/mL) = mass/ Volume
》Volume = mass/ Density
Please prompt me if I'm wrong in my workings. Hope this helped.
diantara senyawa di bawah ini yang tidak berisomer dengan n- heksana adalah
a) 2 metil pentana
b) 2 etil pentana
c) 2,2 dimetil butana
d) 2,3 dimetil butana
e) 3 metil pentana
Answers
Help
Hope this helps
If acid spills on your shoulder, you should use the
Answers
Answer:
laboratory/safety shower.
Otherwise, immediately wash with water and tell your teacher or instructor.
The number 199,078 has how many significant digits?
Answers
I think it's 6
Explanation:
zeros between other nonzero digits are significant
ex. 50.3 has 3 significant figures. ex. 8101.01 has 6 significant figures
Both protons and neutrons are located inside the nucleus of an atom. Changing the number of neutrons in the nucleus would form different isotopes of the same element. Which of these Best describes the outcome of decreasing the number in the nucleus?
Answers
Answer:
The number of protons in an element is the same thing as the element's atomic number. Which means that bringing any change to the number of protons in an element by decreasing it would change the element as well as the number in the nucleus completely.