Answer:
red
1: The SCP/E-water molecule: oxygen atom (red color) and hydrogen atoms (white color).
Explanation:
At 303 K, the volume of a gas is 30.0 ml. At constant pressure, what is the new
volume of the gas if the temperature is decreased to 283K?
Answer:
V₂ = 28 mL
Explanation:
Given data:
Initial temperature = 303 K
Initial volume = 30.0 mL
Final temperature = 283 K
Final volume = ?
Solution:
The given problem will be solve through the Charles Law.
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
V₂ = V₁T₂/T₁
V₂ = 30.0 mL × 283 K /303 K
V₂ = 8490 mL.K / 303 K
V₂ = 28 mL
Relate pH values of 9.1, 1.2, and 5.7 to hydronium and hydroxyl ion concentration.
Answer:
9.1 = basic 1.2= very acidic 5.7= acidic
Explanation:
Which statement applies only to electric force insted of electric and magnetic forces
Answer:
If the options are
A. It can push objects apart
B. It can pull objects together
C. It acts between charged particles
D. It acts between objects that do not touch
I'm pretty sure it would be C.
Sry if wrong but have nice day! <3
what is the name of this atom?
A.) Beryllium
B.) Boron
C.) Fluorine
D.) Helium
Answer:
Explanation:
A .
A dish is given to you, which contains a blackish yellow powder. When you move a magnet over it, black particles fly upwards and get stuck to the magnet. All that is left in the dish is a yellow powder, which you discover to be sulfur.
Was your original powder an element, compound, or mixture, and how do you know?
PLEASE ANSWER IF YOU HAVe an ANSWER OR NOt JUST FOR THE POINTS OR ELSE YOU WANT TO BE REPORTED!!!! please and thank you!
Answer:
It is a Mixture
Explanation:
It's a mixture because it was a substance made from mixing other substances together. And when the magnet went over the powder, the iron is lifted and not the sulfur. So the different parts of it can be separated by any physical means that allows the parts to seen separated
Answer:
its is a mixture
Explanation: because I did the question
What is the mass 5.00 x 1022 molecules of PbCI2
Answer:
ion know this one
Explanation:
Plants make their own food and are not required to consume food for energy. Into which category does this characteristic cause plants to be assigned?
Answer:
Autotrophic or Producers
Explanation:
They are often called producers because they make their own food.
Which of the following is true about waves?
A.
They are always visible.
B.
They always move matter.
C.
They carry energy.
D.
They can only travel though outer space.
Answer:
c. they carry energy is the answer
Answer:
C. they carry energy
Explanation:
Energy can be carried from one place to another by waves, including water, light, and sound waves. Waves are oscillating disturbances that travel through but do not move matter.
Infrared radiation escaping from hot coals is an example of invisible waves carrying energy. This energy can be felt as heat.
when is the energy source used to fuel photosynthesis
Answer:
Photosynthesis, process by which green plants and certain other organisms use the energy of light to convert carbon dioxide and water into the simple sugar glucose. In so doing, photosynthesis provides the basic energy source for virtually all organisms.
Explanation:
property of an acide
Answer:
hi
Explanation:
acids are corrosive, rective when combined with bases form salt and when combined with metal form h2o
Answer:
page no,165 ma xa. yo question KO ans
What I need help fast!
Two individual atoms of the same element are slightly different. One has one more proton than it has electrons. The other has one more electron than it has protons. These atoms are both
ions
isotopes
freons
xenons
phlogistons
Answer:
ions
Explanation:
Individual atoms of the same element but having slightly different number of protons and electrons are called ions.
Ion is a charged particle.
An atom is made up of three fundamental subatomic particles. Protons are the positively charged particles Electrons are the negatively charged particles Neutrons do not carry any charges.When the number of protons > electrons the body is positively charged.
When the number of electrons > protons the body is negatively charged.
Charged particles are called ions.
Sounds with small amount of energy______distances than sounds with more energy
A.Shorter
B. Longer
C.same
D. Medium
Write the net ionic equation for the following reaction:
AgC2H3O2(aq) + CaCl2(aq) →
Answer:
2Ag^+(aq) + 2Cl^-(aq) --------> 2AgCl(s)
Explanation:
The net ionic equation reflects the main reaction that occurred in the system. It tells you the most important reaction that took place.
If we first put down the balanced molecular equation for the reaction, we have;
CaCl2(aq) + 2 AgC2H3O2(aq) ---------> 2 AgCl(s) + Ca(C2H3O2)2 (aq)
The net ionic equation is;
2Ag^+(aq) + 2Cl^-(aq) --------> 2AgCl(s)
Please can anyone help me? How are the first 20 elements of the periodic table constructed?
Answer:
Based on the periodic law
Explanation:
All the elements on the periodic table were constructed based on the periodic law.
Henry Moseley in the 1900s re-stated the periodic law by changing the basis of the law from atomic weight to atomic number. The present periodic law is therefore "the properties of elements are a periodic function of their atomic number".
The atomic number is the number of protons in an atom. Based on the graduation of atomic number on the periodic table, elements are classified into groups and periods.Easy Chemistry/ Help
When was Quartz found and how is it extracted??
Answer:
Quartz was discovered in 1880 and they use buldozers and backhoes (to remove dust/dirt around it) and rarely explosives.
Explanation:
Help please its science
Answer: any answer choices
Explanation:
HELP!!!
i will mark brainliest
Answer:
Blank #1: noble gas
Blank #2: bonding
Blank #3: octet rule
Blank #4: share
Blank #5: filled
Blank #6: halogen
Please give me brianliest!!
Also can someone help me with this one as well, thank you! :)
Answer:
a. The density of the aluminum will change if the sample gets too big.
Explanation:
Since increasing its size increases its volume hence it affects the value of its density by decreasing.
note: Density = mass/volume.
How many atoms of nitrogen are in the chemical formula Ni(NO3)2?
Answer:
2
Explanation:
bc the 2 that's after a bracket refers to both oxygen and nitrogen, making oxygen 6 bc it already has a 3(3×2=6)
Answer:
2
Explanation:
The sequence of bases in a DNA template strand is 5'AAAACTGTGCAT3'. What is the corresponding mRNA produced? Label the 3' and 5' end in your answer Enter the mRNA sequence with labels for the 3' and 5' ends.
The corresponding mRNA to 5'AAAACTGTGCAT3' is
3'UUUUGACACGUA5'.
What is nucleotide sequence?Nucleotides are the bases that are arranged in a specific way, and it joins the two strands of DNA and RNA.
In DNA, four nucleotide bases are present AT and GC. They are attached to each other.
In RNA, the same bases are present but instead of T, U uracil is present.
When reading the DNA, the RNA bases complimentary join with the bases of DNA.
Thus, the corresponding mRNA sequence is 3'UUUUGACACGUA5.
Learn more about base sequence
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What type of radioactive decay is shown? 82 Br → 82 Kr + te 35 36 Alpha O Beta O Gamma?
Answer:
In 1889, Ernest Rutherford recognized and named two modes of radioactive decay, showing the occurrence of both processes in a decaying sample of natural uranium and its daughters. Rutherford named these types of radiation based on their penetrating power: heavier alpha and lighter beta radiation. Gamma rays, a third type of radiation, were discovered by P. Villard in 1900 but weren't recognized as electromagnetic radiation until 1914. Since gamma radiation is only the discharge of a high-energy photon from an over-excited nucleus, it does not change the identity of the atom from which it originates and therefore will not be discussed in depth here.
Because nuclear reactions involve the breaking of very powerful intra nuclear bonds, massive amounts of energy can be released. At such high energy levels, the matter can be converted directly to energy according to Einstein's famous Mass-Energy relationship E = mc2. The sum of mass and energy are conserved in nuclear decay. The free energy of any spontaneous reaction must be negative according to thermodynamics (ΔG < 0), and ΔG is essentially equal to the energy change ΔE of nuclear reactions because ΔE is so massive.
Explanation:
Hope it helps
A chemist is identifying the elements present in a sample of seawater. What characteristic of an element’s atoms always determines the element’s identity?
Which subatomic particles are found in the nucleus of an oxygen atom?
F Neutrons and Electrons
G Electrons and Protons
H Protons and Neutrons
J Protons, Neutrons, and Electrons
Answer:
the answer is protons and neutrons
Explanation:because
The subatomic particles are found in the nucleus of an oxygen atom are Protons and Neutrons. Thus, option H is correct.
What are subatomic particles?An electron is defined as a subatomic particle which is charged negatively either bound to an atom or not it means free. The nucleus of an atom is made up of electron, proton and neutron. The electron is a basic particle and electron is not made of anything.
The nature of electron is free it means they are present freely in nature and consist of an atom.The main function of electron is that they play the role of negatively- charged component of an atom.
The electrons are primary source of current conducting and electrons number as well as atomic number of an element is always same or equal. There is no size of electron but the mass of electron is 9×10^-31.
Therefore,The subatomic particles are found in the nucleus of an oxygen atom are Protons and Neutrons. Thus, option H is correct.
Learn more about subatomic particles here:
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Which of the following diagrams correctly represents the formation of a compound consisting of magnesium and fluorine?
Answer:
See explanation
Explanation:
The image attached describes the formation of magnesium fluoride.
Magnesium has two valence electrons while fluorine has seven valence electrons. Magnesium can now transfer one electron each to two fluorine atoms thereby forming the compound MgF2.
This has been shown pictorially in the image attached to this answer.
write the cations and anions present in NaCl
How many moles are there in a 122 gram sample of nickel (Ni)?
7.16 x 103 moles
6.22 mol
2.08 mol
0.481 mol
The atomic mass of nickel is 58.71 gm and the given mass of nickel is 122 gm. Therefore, 2.08 moles are present in a 122-gram sample of nickel.
Nickel:
The atomic number of nickel is 28.The symbol of nickel is Ni.Density of a nickel 8.908 g/cm3.It is a d block element.It belongs to group 10 and period 4.It is also called transition metal.It is a metal and is located between groups 2 and 3.Mass of nickel given: 122 grams.
Atomic mass of nickel: 58.71 g mol
Number of moles = Mass / molar mass
= 122/ 58.71
= 2.078
= 2.08 moles.
The atomic mass of nickel is 58.71 gm and the given mass of nickel is 122 gm. Therefore, 2.08 moles are present in a 122-gram sample of nickel.
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what coefficient will go in the box
Answer:
5
Explanation:
I don't remember very thing from this unit but I believe 5 makes it possible
How many liters of ammonia are formed with 49.8 g of nitrogen gas reacting with 10.7 g of hydrogen gas at S.T.P.?