Answer:
nnhnhgnklhnhmkghklmfmg
Explanation:
cvgngh kcvl vl gkh kn hg
*
Compared with a mole of silver atoms, a mole of calcium atoms
O cannot be determined
O has fewer atoms
O has more atoms
O has the same number of atoms
to be honestl id ldm
how many molecules of butane are contained in 25.0 ml of butane? the density of butane is 0.6011 g/ml and the molar mass is 58.12 g/mol.
Explanation:
To determine the molecules of butane we can either use multiple steps or use a combined equation based on the following formulas:
Molecules of butane = Moles × Avogadro's Number
Moles of Butane = Mass ÷ Molar Mass
Mass of Butane = volume × Density
∴ Molecules of butane
= [(volume × Density) ÷ Molar Mass] × Avogadro's Number
= ([(25.0 ml × 0.6011 g/ml) ÷ 58.12 g/mol] × (6.022 × 10²³ molecules/mol))
= 1.557 × 10²³ molecules
∴ 25.0 ml of butane of density of 0.6011 g/ml contains 1.557 × 10²³ molecules.What type of intermolecular bond may form between na and br
Answer:
Ionic
Explanation:
Na is a metal and Br is a non-metal. Makes an ionic bond. Hope that helps
An element is composed of one type of atom with its own unique properties. TRUE OR FALSE
Answer:
It's true
Hope it helps:-)
Answer:
true
Explanation:
I need a catchphrase for the element Boron as a superhero describing its traits!
i will give u brainiest if u help me
How can a charged balloon attract a wall without any contact?
The positive charges of the uncharged wall move to the outside.
The wall changes shape and the positive charges move to the inside.
The negatively charged balloon repels and moves away from the wall.
A positive charge in the balloon attracts the negative charges in the wall
Answer:
A positive charge in the balloon attracts the negative charges in the wall
Explanation:
The question states attract, so we know it's not going to be option C.
The wall clearly doesn't change shape, so that eliminates option B as well.
The balloon gets positively charged, and so for an attractive force to appear, you need the opposite charge from the wall, i.e. negative.
Remember: opposite charges attract
Which means, the only option that makes sense is Option D.
P.S.: You could've concluded it's option D just because it's the only one that contains the word "attract" in there!
Hope I helped! :)
Answer:
a positive charge in the ballon attract the negative charge of the wall
Explanation:
Which substance can not be broken down by a chemical change?
Answer:
Among the given substances, the one that cannot be broken down by a chemical change is arsenic.
Explanation:
Rawr
Answer:
the substances that cannot be broken down by a chemical change is arsenic.
The reaction of C2H4 +Cl2 is what type of reaction.
Answer:
C2H4(g) + Cl2(g)→C2H4Cl2(g)
This is an example of synthesis reaction, when compounds are joined together.
PLEASE HELP ASAP 100 POINTS!!!!!
Answer:
Melting
Explanation:
• A chemical change is a change that can be reversed.
Other chemical changes include;
Melting (solid to liquid)Evaporation (liquid to gas)Condensation(gas to liquid)Sublimation (solid to gas and gas to solid)[tex].[/tex]A strong acid is one that
a Doesn’t easily dissociate into ions when I’m solution
B is very dilute in the solution
C easily dissociates into ions when I’m solution
d is very concentrated in the solution
Answer:
C. easily dissociates into ions when I’m solution
Explanation:
Strong acids are compounds that completely decompose when dissolved in water and produce the total number of ions.
A scientist introduces an unknown type of particle into a cathode ray tube. The unknown particles travel in the same direction as the cathode ray. Which of the following statements is true?
A. The charge of the unknown particles is positive.
B. The charge of the unknown particles is negative.
C. The charge of the unknown particles is neutral.
Answer: B
Explanation:
Atoms form ions by gaining or losing valence electrons to reach a more stable electron configuration with a full valence shell. The electron configuration of the ion is similar to the nearest noble gas to the atom. Identity the charge when nitrogen becomes an ion.
A -3
B -2
C +1
D +5
Answer:
Explanation:
A : -3
Calculate the percent composition by mass of each element in NaClO2.
Answer: Divide the mass of the first dissolved component by the solution mass, and then multiply the result by 100 to calculate the mass percentage. In our example, the first dissolved compound is NaCl; the mass percent is (10 g / 136 g) x 100 percent = 7.35 percent.
Explanation: its up, look
People who have certain lung diseases, such as emphysema or lung cancer, often have to use oxygen from tanks. A large volume of oxygen can be put into a small tank because oxygen is a gas, and gases can be_________.
Answer:
I believe the answer is compressed
Explanation:
The answer may be a slightly different word, but if it's looked at by a human and not a robot compressed should work too
Gases can be compressed by applying high pressure. Thus large volume of oxygen can be contained in a tank by compressing the gas with high pressure.
What are gases?Gases are substances in state where its molecules are located far apart and are able to spread in the surroundings. This property of spreading based on the concentration difference is called diffusion.
Thus, gases diffuse from high concentrated area to lower concentration region. Gaseous substances does not have a certain volume, mass or shape. But when they are collected into a container then the volume will be that of the container.
in liquid state, molecules are some more closer in comparison to gases and an intermolecular attraction of force bind these molecules together to have a certain volume and mass. Whereas in solids, all the molecules are tightly packed.
Gases can be liquified by applying high pressure at low temperature so that the distance between molecules can be decreased and an intermolecular force of attraction occurs there.
So that large volume of gases can be collected to a tank by compression using high pressure.
To find more about gas compression, refer the link below:
https://brainly.com/question/23026638
#SPJ2
Which of the following changes the solid Earth the most?Metamorphic rocks are formed when sedimentary or igneous rocks are subjected to heat or pressure and recrystallize without melting. Which of the following rocks results from the metamorphism of limestone?
Answer:
The metamorphism of limestone results in the formation of marble
Explanation:
which type is every one in this picture: pure substance or mixture?
Answer:
1,2,3,4,8,9,10,12,14,15 and 16
Explanation:
Coz they have different kinds (colours) of atoms
The rest are pure substances,
I'm not so sure though, double check after this
Joshua loads a water balloon into a giant sling shot, pulls it back, and launches the balloon toward a target. The balloon misses the target by 3 feet, so he decides to try again. Which part of the process demonstrates an application of force?
Select all the statements that are TRUE about igneous rocks:
Answer:
Intrusive rocks are formed by slow cooling lava/magma.
Igneous rocks are always formed from lava/magma.
Explanation:
rar please help?????????????????????????????????????????????????????
Answer:
a new substance forms
Explanation:
Answer:
A new substance formed
Explanation:
Suppose you identify a new element, Pivotium. Pivotium has two isotopes: Pivotium-426 and Pivotium-417. In the mixture, 11% of the mixture is Pivotium-426; the rest of the mixture is Pivotium-417. What is the relative atomic mass for Pivotium?
Answer:
Explanation:
Suppose you identify a new element, Pivotium. Pivotium has two isotopes: Pivotium-426 and Pivotium-417. In the mixture, 11% of the mixture is Pivotium-426; the rest of the mixture is Pivotium-417. What is the relative atomic mass for Pivotium?
Multiply the mass by the % written as a decimal and add the result.
426X0,11 + 417X 0.89 = 417.99 or 418
check 90% is. 417 only 10% 426
417X.9 +(426X0.10)=417.9
Question 5
The energy produced by a generator can BEST be described as
A thermal
B chemical
C nuclear
D kinetic
E electrical
Answer:
E- Electrical
Explanation:
It converts mechanical energy to electrical energy
What is climate? How does it differ from weather
What should scientists do when they see that the data collection or analysis
from their experiment has limitations?
O A. Ignore the limitations when they draw conclusions.
O B. Repeat the experiment to see if it still has limitations.
C. Decide not to report any of the experimental results.
O D. Describe the limitations in detail in their final report.
Answer:
D. Describe the limitations in detail in their final report.
Explanation:
Answer:
D. Describe the limitations in detail in their final report.
On the 14 point pH scale, soaps and cleaning solutions are typically -
Question 7 options:
8-14
7
Answer:
I believe the answer is ;_; 8-14
Im sorry if im wrong
Answer: 8-14 is the right answer
Explanation:
in the reaction of aluminum metal and oxygen gas to make aluminum oxide, how many moles of aluminum will react with 0.80 grams o2?
Answer:
When 6.38 moles of O2 and 9.15 moles of Al react, the ratio of aluminum to oxygen is 9.15/6.38 = 1.434. This shows that all of the oxygen is consumed before the aluminum and when the reaction ends the reactant aluminum is left. The number of moles of Al2O3 formed is approximately 4.25 moles.
Select the atoms that are lithium with a mass of 7
Answer:
I dont know
Explanation:
I just dont know
the reaction of zinc metal and hydrochloric acid produces hydrogen gas and zinc chloride. true or false?
Answer:
true.
Explanation:
Zn(s) + 2HCI(aq)=H2(g)+ZnCl2(g)
a neutral atom of astatine would have how many electrons?
Answer
85
Explanation:
Astatine has an atomic number of 85.
This means it has 85 positively charged protons.
If it is neutral, it must have the same number of negatively charged electrons, or 85
What is Force? I'll Mark BRAINLIEST
Answer:
A push or pull is referred to as a force. Forces can cause objects to move, slow, stop, or change the direction in which they travel. The force of gravity, for example, pulls all objects toward the Earth's center. Every time two things interact, a force is exerted on each of them. When this happens, the two items no longer feel the force after the interaction ends.
Explanation:
Force is that external physical cause which changes or tends to change:
the Direction of a moving body,the dimensions of a non-rigid body,state of rest or motion condition of a body.hope this helps you.
why is stability of compounds essential
Answer:
chemical stability is important to consider in the comprehensive assessment of pharmaceutical properties, activity, and selectivity during drug discovery.
Answer:
In general, molecules are stable because all their constituent atoms have sufficient "valence" electrons-that is, electrons that participate in chemical bonding. Such electrons reside in the outer, or valence, "shell," which must fill up with the appropriate number of electrons for the bound atoms to be come stable.
Explanation: