Answer:
Mercury is an liquid metal
Explanation:
Mercury is a chemical element with the symbol Hg and atomic number 80. It is commonly known as quicksilver and was formerly named hydrargyrum.
Symbol: Hg
Which of the following is true about sound waves and light waves?
A.
All sound waves and light waves are longitudinal waves.
B.
Most sound waves are transverse waves, while light waves are longitudinal waves.
C.
All sound waves and light waves are transverse waves.
D.
Most sound waves are longitudinal waves, while light waves are transverse waves.
Answer:
Most sound waves are longitudinal waves, while light waves are transverse waves
Explanation:
How many atoms are in CHOFeNaNPb2
a.7
b.8
c.9
d.10
Answer:
1+1+1+1+1+1+2=8
because
C, H, O, Fe, Na, N are one atom each
+ we have two atoms of Pb because we have an index 2
we just collect them
1 + 1 + 1 + 1 + 1 + 1 +2 =8
Which of the following is true about covalent bonding?
Up to 8 electrons can be donated from one element to another
Electrons are donated from the outer shell
Electrons are shared in pairs
All of the above
None of the above
Answer:
Electrons are shared in pairs!
Explanation:
I'm doing learning about Covalent Bonding too:)
Can someone help I’ll give s you BRAINLIST !!! I just need help in these question btw it’s science and 6th grade work plzz help meeee
Answer:
More than 2,000 Years Ago, the Greek philosopher Aristotle suggested a model of the solar system. Aristotle's model was geocentric, or Earth-centered. In the model. the sun, stars, planets revolved around the Earth. In 150 AD an astrologer named Ptolemy began to support Aristotle's geocentric model.
In 1543 AD, an astronomer named Copernicus proposed a heliocentric model of the solar system. In this model, the planets revolve around the sun. Due to the invention of the telescope, the solar system could be explored in more detail. Galileo used the telescope to support Copernicus's theory of the sun being the center of the universe.
In the late 1500's, Kepler developed a law that explained planetary motion. Kepler's law is so accurate we still use them today.
Explanation:
Can you show me the rest of the question? I can not see it. Also, I know this is multiple choice fill in the blanks so I might be wrong. I hope that this helped though. This took a lot of research. The websites I used are commented down below. |
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Two electrons in the 1s orbital must have different spin quantum numbers to satisfy
Hund's Rule
The Magnetic Rule
The Pauli Exclusion Principle
The Aufbau Principle
Answer: The Pauli Exclusion Principle
Explanation:
The electrons are filled in orbitals of equal energy with one electron entering each orbital until all the orbitals contain one electron with the same spin. The pairing of electrons take place thereafter.
The first electron in an orbital could have +1/2 spin or -1/2 spin. All of the electrons in singly occupied orbitals have the same spin so as to maximize total spin. which is given by Hunds rule.
Two electrons must have opposite spin and thus different spin quantum numbers is given by Pauli's exclusion principle.
Please help! Will mark brainliest!
I’m doing exams please hurry!
The graph below plots the temperature and luminosity of stars on the main
sequence.
Which of these stars had an initial mass greater than the initial mass of the sun?
Star 1 and Star 2
Star 1 and Star 4
Star 2 and Star 3
Star 3 and Star 4
Answer:
Star 1 and two. Good on exams I'm doing mine two
Answer:star 1 and 2
Explanation:
How many molecules of NO2 could be produced from 25 molecules of O3? please explain so I and others could understand how you got the answer (100points)
Further explanation
Given
25 moles of Oxygen(02)
Required The number of molecules
Solution Reaction
2NO+02 → 2NO2
From the equation,
mol NO2: = 2/1 x mol O2 = 2/1 x 25moles = 50 moles
The number of molecules :
[tex] = 50 \times 6.022 \times 10^{23}[/tex]
[tex] = 3.011 \times 10{²5}[/tex]
A student holds two iron magnets, one in each hand. the south pole of one magnet is pointed toward the south pole of the other magnet. as the magnets get closer to each other, they will-
A) attract more strongly
B) attract more weakly
C) repel more strongly
D) repel more weakly
When the south pole of one magnet is pointed close to the south pole of another magnet, they will strongly repel each other. Therefore, option (C) is correct.
What is a magnet?A magnet is described as a material that generates a magnetic field and this magnetic field is responsible for the considerable property of a magnet. Properties of a kind of force that pulls ferromagnetic materials, such as iron, cobalt, steel, etc., and attracts or repels other magnetic materials.
A permanent magnet can be defined as an object composed of a material that is magnetized and produces its own magnetic field. This type of material can be magnetized, is strongly attracted to a magnet, is called ferromagnetic, and contain the elements iron, nickel, and cobalt.
Each magnet has a set of North and South poles within them. The south pole of one magnet attracts the north pole of another magnet while similar piles such as the south pole of one magnet repel the south pole of another magnet. Similarly, the North pole of one magnet repels the north pole of another magnet when they get closer.
Learn more about the magnet, here:
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(PLS HELP)
Describe three of your favorite foods. How do they change phases of matter when they are heated?
Answer:
ice.
Explanation:
it becomes a liquid
how are electrons arranged in ionic bonds?
WILL MARK BRAINLIEST. Where did the sodium atom in the sodium acetate come from?
Why does moisture appear on the outside of a cold glass of water?
Answer:
it appears because Of condensation
Answer:it is called condensation
Explanation:
The human body is 60% water. Water has a molar mass of 18.02 g/mol. If a person weighs 75 kg (75,000 grams), how many moles of water would that person contain?
Answer:
Woah thats a lot of calculating but the answer is 210.
Explanation:
Im really sorry if im wrong but im not very good with math cause I was just trying to help.
Removal of only one organism from a habitat can have a negative effect on other organisms. What details from the article support this claim? Think about what you know about organisms in their environment, and then explain how the details support the claim.
Answer:
When we refer to microorganisms, if one is not there, the environment changes and another microbiota begins to predominate in the organism, which can be more or less pathogenic.
Explanation:
When the microorganisms that coexist and form the commensal biota, they live in an ideal equilibrium environment without generating pathology in humans, on the other hand, when this equilibrium is broken because some bacteria are absent, the pathology or infectious disease appears as it gives rise to to a rare biota such as pathogenic or transient.
What type of bond is between the oxygen atoms in the following: O2?
single
double
triple
Answer:
Double bond
Explanation:
Types of catalyst.....
Plsz.....
Answer:
Explanation:
(1) Homogeneous, (2) Heterogeneous (solid), (3) Heterogenized homogeneous catalyst and (4) Biocatalysts
The nutritional recommended daily allowance (rda) of calcium is 1,300 mg for a 9-18-year-old. How many grams is this? How many atoms of calcium is this?
Answer:
1.3 grams and I think the atoms of calcium is 7, 829. 9
Explanation:
hope this helps!
What else is produced during the combustion of butane C4H10?
2C4H10 + 130,2 --> 8______ + 10H2O
PLEASE HELP
Mintu needs to determine the missing ecosystem in the set.
intertidal zone, open ocean, ________, ________
Which ecosystems best complete the set?
(A.)wetland, stream
(B.)neritic zone, wetland
(C.)stream, coral reef
(D.)coral reef, neritic zone
Answer:
I think the answer is D.coral reef, neritic zone
Explanation:
can someone sell me what Asexuality means lol
Answer:
Asexuality is the lack of sexual attraction to others, or low or absent interest in or desire for sexual activity. It may be considered a sexual orientation or the lack thereof. It may also be categorized more widely to include a broad spectrum of asexual sub-identities.
Explanation:
How many moles are in 150.0 grams of Fe2O3
Answer:
its 150 hope this helps
Explanation:
Which of the following statements is false?
a) Ionic compounds are brittle because the atoms are in a crystalline arrangement
B)Ionic compounds are brittle because if ions are shifted like charged ions will repel
C) Metals are malleable when the atoms can slide past one another
d)Metals can be bent because their free flowing electrons can rearrange and still hold the atoms together
im pretty sure its A, but not positive, can someone explain?
Answer:
a is write
Explanation:
Why are all ionic compounds crystalline in structure?
Ionic compounds are generally hard, but brittle. ... The repulsive forces between like-charged ions cause the crystal to shatter. When an ionic crystal breaks, it tends to do so along smooth planes because of the regular arrangement of the ions.
A reaction between 7.88 grams of element X and 23.12 g of elementy produced a compound called XY.
How many grams of XY were produced?
Answer:
30 g
Explanation:
According to Mendeleev's theory, the total mass of the reactants and products are the same.
A large piece of cork has a density of 0.251 g/cm3 and a volume of 1000.0 cm3. Calculate the mass of the cork.
Answer:
251 gExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volume
From the question we have
mass = 0.251 × 1000
We have the final answer as
251 gHope this helps you
A chlorine atom has 18 electrons and 17 protons. What is this atom called?
Lesson 5.01
Question 1 options:
negative ion
neutral ion
positive ion
nucleus
Answer:
Negative ion
Explanation:
I took the test
The given atom chlorine contains 18 electrons and 17 protons. It have one electron that dominates over the proton number. Thus it have a negative charge and it is a negative ion.
What are ions?Ions are formed by the lose or gain of electrons from neutral atoms. Atoms are neutral in ground state because they contains equal number of negatively charged particles called electrons and positively charged particles protons.
When atom lose an electron, it gains a positive charge because by the lose of an electron, protons dominate by one. Similarly when atom gain an electron they form negative ions, since one more electron leads one extra negative charge.
The number of electrons in Cl atom is `17. When it gains one electron then one unit of negative charge dominates over the 17 protons. Thus it form a negative ion with 18 electrons.
To find more on ions, refer here:
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A rock has a mass of 48 grams and a volume of 16 mL. What is the density of the rock?
Answer:
Divide mass by volume. you get 3
Explanation:
Which of the following is true about the reactions shown below?
C5H12 + 8 02 --> 5 CO2 + 6 H20 *
(1 Point)
O 9 moles of reactants chemically change into 11 moles of product
9 liters of reactants chemically change into 11 liters of product
9 atoms of reactants chemically change into 11 atoms of products
9 grams of reactants chemically change into 11 grams of products
the answer to this equation is " double replacement "
hopefully i helped
Answer:
9 moles of reactants chemically change into 11 moles of product
Explanation:
An isotope has 17 protons, 16 neutrons and 17 electrons. It's mass number is
32 i think but im not that sure
Answer:
33
Explanation:
Which two things cause the orbits of planets to be nearly circular?
O A. Inertia
O B. Magnetism
O C. Gravity
O D. Electricity
Answer:
Gravity and inertia
Explanation:
each plant does have magnetism but they are two far away from each other to cause anything to happen. Electricity just dosent make sense.
How are scented candles made?
Answer:
The aroma from a lighted scented candle is released through the evaporation of the fragrance from the hot wax pool and from the solid candle itself. Like unscented candles, properly-formulated scented candles will primarily produce water vapor and carbon dioxide when burned
Explanation:
