Answer:
B
Explanation:
The same atoms can combine in more than one ratio.
The same atoms can combine in more than one ratio. Hence, option B is correct.
What is a covalent bond?A covalent bond shares one or more pairs of electrons between two atoms.
Covalent bonds are the bond between non-metals that are linked together by shared electrons. Covalent compounds are named with different prefixes to identify the number of atoms in the molecule.
Hence, option B is correct.
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which of the following molecules has only two non binding pairs (long pairs) of electrons in its lewis structure?
a)O2
b)CH4
c)NH3
d)H2s
Explanation:
NH₃ has only two non-binding pairs (lone pairs) of e⁻ in it's Lewis structure.
••
H—N—H
|
H
Therefore,
C is correct. ✔
How does bacteria from a fecal transplant help the patient with an C. difficile infection?
Answer:
difficile infection. By reintroducing a healthy diversity of bacteria, fecal transplantation can re-establish colonization resistance to prevent C. difficile from gaining a foothold and becoming a dominant organism in the environment of the gut.
Explanation:
5. an atom that has lost or gained an electron and has become charged
A.ion
B. proton
C. ionic bond
D. compound
Answer:
It would be compound.
Explanation:
It is this way because if it adds another proton it becomes more positive that nuetral, and if you add an electron it just makes the atom more dense. That is why the answer is compound. Hope this helped :)
HELPS MEEEEEEEEEEEEE!!!!!!!!!!!!!
Conduction is ______________.
A. When particles transfer energy by touching.
B. None of these
C. When the sun warms an object.
D. The flow between warm and cool sections of a fluid.
Answer:
a
Explanation:
Answer:A. When particles transfer energy by touching.
Example: After a car is turned on, the engine becomes hot.
Radioactive isotope X has a half-life of 500,000 years. This isotope may be found in some types of volcanic rocks. A particular sample of volcanic rock taken from a layer that covered up some of the earliest known human-like footprints contains 0.125 mg of isotope X. The volcanic rock sample originally contained 8.00 mg of isotope X. How long ago were these footprints made. I need the equation. Thanks. please I am stuck on this question. PLEASE
Answer: The footprints were made [tex]2.99\times 10^6years[/tex] years long ago.
Explanation:
Radioactive decay follows first order kinetics.
Half-life of isotope X= 500,000 years
[tex]\lambda =\frac{0.693}{t_{\frac{1}{2}}}=\frac{0.693}{500000}=0.00000139year^{-1}[/tex]
The equation for first order kinetics is :
[tex]N=N_o\times e^{-\lambda t}[/tex]
N = amount left after time t = 0.125 mg
[tex]N_0[/tex] = initial amount = 8.00 mg
[tex]\lambda[/tex] = rate constant
t= time
Putting the values we get:
[tex]0.125=8.00\times e^{- 0.00000139years^{-1}\times t}[/tex]
[tex]0.0156=e^{- 0.00000139years^{-1}\times t}[/tex]
[tex]t=2.99\times 10^6years[/tex]
The footprints were made [tex]2.99\times 10^6years[/tex] years long ago.
What is the role of gravity in the solar system?
Answer:
Explanation:
Gravity is what holds the planets in orbit around the sun and what keeps the moon in orbit around Earth. ... Gravity creates stars and planets by pulling together the material from which they are made. Gravity not only pulls on mass but also on light.
A car travels at 35.0 mi/hr. How far has it gone in 2455 seconds?
Answer:
The answer is 23.8 milesExplanation:
The distance covered by an object given it's velocity and time taken can be found by using the formula
distance = velocity × timeFrom the question
velocity = 35.0 mi/hr
time = 2455 s = 0.68 hr
We have
distance = 35 × 0.68
We have the final answer as
23.8 milesHope this helps you
Can anybody help me with this please
Answer:
30
Explanation:
its pushed into a 30 resistor
Two or more atoms that have been chemically combined are
called a
Answer:
compound
Explanation:
HELPP
A monatomic ion always have one unit of charge. (+1 or -1) on the species
true or false
Answer:
No, this is invalid. The term mono in front of monoatomic simply refers to the number of atoms that are present in a compound or simply by itself it has no relationship with respect to the overall charge of the compound.
Explanation:
For instance Ca is considered as a monoatomic ion but it has a charge of +2.
help quick please?????
Answer:
the core
Explanation:
Answer:
3rd option, the core.
Explanation:
which element is a liquid at 1000 K
Answer:
it is aluminum (Al)
Explanation:
as distance from nucleus increases , energy of shells decreases, correct the wrong statement
as distance from nucleus increases , energy of shells also increases
This is a property of matter that can be identified without changing the identity of the substance
PLEASE ANSWER QUICKLY!
Answer:
hkile uo gihme rapre
Explanation:
How many molecules are in 937 g of calcium acetate?
Answer:
158.17
Explanation:
divide the given mass by the molar mass
The main goal of science is to
Answer:
The goal of science is to learn how nature works by observing the natural and physical world, and to understand this world through research and experimentation.
Explanation:
H2+ 02 H2O
how do you balence this
Answer:
As the number of atoms in the reactants side is equal to the number of atoms in the product side, the reaction is balanced
Two hydrogen molecules per oxygen molecule are produced because water (H2O) has a ratio of two hydrogen atoms to one oxygen atom. A decomposition reaction occurs when one reactant breaks down into two or more products. This can be represented by the general equation: AB → A + B.
H2O is the chemical formula of water. It means that each molecule of water is made up of two hydrogen atoms, indicated by the letter H, and a single oxygen atom, represented by the letter O. Water is chemical substance with no smell, taste or color.
What affects the pressure of an object? *
energy is lost due to
Answer:
Friction
Explanation:
Energy is lost to heat as the object overcomes kinetic friction as it slides up the ramp. The energy loss is equal to the work done by the friction force.
The capability of a substance to be stretched into thin wires without breaking is known as —
A malleability
B conductivity
C luster
D ductility
Answer:
The answer is D, ductility
Explanation:
The definition of ductile is "(of a metal) able to be drawn out into a thin wire."
1. Define λmax and explain why it is desirable to do the experimental procedure at λmax? 2. Around what absorbance would you expect the λmax to be with each color solution? (Blue, green, red, yellow) 3. A pipet is used to make the solution dilutions in lab. Suppose in making the dilution, additional distilled water is accidentally added. Will the concentration of the solution be higher or lower that disered? Explain.
Answer:If you help me with the triple beam balance gizmo then i can do this for you
Explanation:please i need help
Can someone please help
Answer:
3
Explanation:
3 ampers (it says in the problem)
Is wax ionic or covalent? why?
Answer:
Candle wax will melt to a liquid and burn as a gas. Only covalent compounds can be liquid or gas!
Explanation:
Question: Is Wax Ionic Or Covalent? - Ceramicsexpandusceramics.com
In the given question, wax is a covalent compound because it is composed of nonmetal atoms that share electrons to create covalent bonds.
Covalent compounds are formed when two or more nonmetal atoms share electrons in order to achieve a stable electron configuration.
Wax is made up of long-chain hydrocarbons, which are molecules that contain only carbon and hydrogen atoms. The carbon and hydrogen atoms in these molecules share electrons to form covalent bonds.Ionic compounds, on the other hand, are formed when a metal and a nonmetal react.Therefore, wax is a covalent compound because it is made up of non-metal atoms sharing electrons to form covalent bonds.
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HURRY I NEED HELP!! Please answer!!
Answer:
I'm confused on what u need us to answer
Is it true or false??. . .Help me please
Answer:
I think the answer is true
Jimmy's science textbook reflects blue light. What color is the book?
Please answer correctly !!!!!!!!!!!!!!!!! Will mark brainliest !!!!!!!!!!!!!!!! And explain please !!!!!!!!!!!!
Hope this is your answer i wasn't able to see he full question so i am not sure
What is the correct lewis dot structure for
24
12Mg 2+?
Answer:
Mg with 2 dots
Explanation:
Mg: as the valnce shell of Mg has 2 electrons only
presented by 2 dots
What is a mixture meaning
Answer:
A mixture is a substance of different things combined together.
Explanation:
Hope this Helps!
Which of the following numbers is in correct Scientific Notation
13.6x103
174.5
O 0.26x10-2
1.5x105
Question 6
Answer:
1.5 x 10⁵
Explanation:
Scientific notation always starts in the 1's place (1.)