Answers
Related Questions
Plants are able to produce special chemicals at the right time and place.
A: True
B: False
help fast my test is almost due
Answers
Answer:
true
Explanation:
during which two processes does a substance release energy?
Answers
Answer:
Freezing and condensation
Explanation:
Because they are exothermic, they release energy
which compound would have the lowest melting point?
Answers
Select the atoms that are lithium with a mass of 7
Answers
Answer:
I dont know
Explanation:
I just dont know
Which of the following are directly proportional? *
volume and temperature
pressure and volume
pressure and temperature
Answers
ANSWER ASAP
PLeAsE
?????????????
Answers
Answer:
The answer is A.) leaving a copper penny in vinegar until it turns green.
All the other options are physical changes, as you can separate the two mixtures.
I hope this helps you! :)
What volume (in L) of 1.10 M FeCl₃ would be required to obtain 0.700 moles of Cl⁻ ions?
Answers
0.636 liters of the 1.10 M FeCl₃ solution to obtain 0.700 moles of Cl⁻ ions.
Thus, Volume (L)= moles/ concentration. 0.700 moles of Cl⁻ ions and the concentration of the FeCl₃ solution is 1.10 M, you can plug in these values to calculate the volume.
Volume (L) = 0.700/ 1.10 M,
Volume (L)= 1.10M/ 0.700moles
Volume (L) = 0.700/ 1.10 ≈ 0.636 L
Therefore, approximately 0.636 liters of the 1.10 M FeCl₃ solution to obtain 0.700 moles of Cl⁻ ions.
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How many atoms are in 3 C2H6
Answers
Have a blessed day and God bless.
Words are on the right please help!
Answers
Answer:
1.Frequency
2.Amplitude
3.Wavelength
4.Medium
5.Back and Forth
6.Up and Down
Explanation:
CORRECT ME IF I'm wrong
Which equation is balanced?
A) A
B) B
C) C
D) D
Answers
Answer:
All of them are equal cause they both have the same sign
Explanation:
If you were to mass the reactants before a reaction and then mass the products after the reaction what would you expect to find and why?
pls answer fast ill give brainliest!
Answers
Answer:
No change...
Explanation:
The law of conservation of mass states that matter cannot be created or destroyed in a chemical reaction. For example, when wood burns, the mass of the soot, ashes, and gases equals the original mass of the charcoal and the oxygen when it first reacted. So the mass of the product equals the mass of the reactant.
Mark as Brainliest please...
Nguyên tử nguyên tố sắt có 26e
a. Viết cấu hình e của sắt
b. Sắt thuộc nguyên tố s,p,d,f
Answers
Answer:
1s2 2s2 2p6 3s2 3p6 3d6 4s2
Explanation:
What is the molecular mass of Br 2?
Answers
Answer:
159.808 g/mol
Answer:
159.80 g/mol
Explanation:
79.90×2=159.80g/mol
how does decreasing the temperature affect the volume of gas??
Answers
Answer: Well, when you decrease the temperature in a gas the volume will decrease as well as the pressure. Since, heating a gas or liquid increases the temperature/pressure. Therefore, it'd increase the volume but since the temperature is decreasing the volume of the gas does too.
Gravity relates to a stream's ability to erode and deposit material by causing water to flow faster down a steep slope. True or False
Answers
Answer:
true
Explanation:
1. Ethanol has a density of 0.800 g/mL.
What is the mass of 225 mL of ethanol?
Answers
Since the ethanol has a density of 0.800 g/mL, the mass of the ethanol is 180 grams.
Given the following data:
Volume of ethanol = 225 mL
Density of lead ball = 0.800 g/mL.
To find the mass of the ethanol;
Density can be defined as mass all over the volume of an object.
Mathematically, the density of a substance is given by the formula;
Density = Mass/Volume
Making mass the subject of formula, we have;
Mass = Density x Volume
Substituting the given parameters into the formula, we have;
Mass of ethanol = 180 grams.
between a water molecule and an ethanol molecule, a hydrogen bond can occur between a lone pair of electrons on the _____a_____ in water and the _____b_____ of an ethanol molecule.
Answers
Answer:
They will form a hydrogen bond with the oxygen atom and the polar hydrogen atom.
Between a water molecule and an ethanol molecule, a hydrogen bond can occur between a lone pair of electrons on the Oxygen and a Hydrogen in water and the Polar hydrogen of an ethanol molecule.
What is Hydrogen bond ?Hydrogen bonding is an interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons.
It is a bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces.
In the given question, They will form a hydrogen bond with the oxygen atom and the polar hydrogen atom.
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which type is every one in this picture: pure substance or mixture?
Answers
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
mass=35g, density=5g/cm3. what is the volume?
Answers
Answer:
7 cm^3
Explanation:
Density = Mass/Volume
5 = 35/x
multiply both sides by x to get
5x = 35
then divide by 5
so x = 7 cm^3
WHAT IS THE MIXTURE OF BOILING POINT AND MELTING POINT?
(ive been stuck on that question for AGES)
Answers
Answer:
A pure substance has a sharp melting point (melts at one temperature) and a sharp boiling point (boils at one temperature). A mixture melts over a range of temperatures and boils over a range of temperatures. Homogeneous mixtures are called solutions.
Answer:
What is it has fixed boiling point substance or mixture? A pure substance has a sharp melting point (melts at one temperature) and a sharp boiling point (boils at one temperature). A mixture melts over a range of temperatures and boils over a range of temperatures. Homogeneous mixtures are called solutions.
Explanation:
lol they got it from go ogle
The nucleus of most atoms is composed of which of the following sub-atomic particles?
A. tightly packed protons.
B. tightly packed neutrons.
C. tightly packed protons and neutrons.
D. loosely connected protons and electrons.
Answers
Answer:
C. Tightly packed protons and neutrons
Explanation:
It consists of two sub-atomic particle namely proton and neutron.
This dense nucleus is responsible for most of the mass of atom.
Answer:
C. tightly packed protons and neutrons
Explanation:
The nucleus of an atom is made of protons and neutrons with electrons orbiting the nucleus.
isotopes Mg-24,Mg-25 and Mg-26 has natural abundance of 79.0%,10.0% and 11.0%. Calculate the relative atomic mass for isotopes Mg-24,Mg-25 and Mg-26.
Please help me with with this question....
Answers
10% of Mg-25
11% of Mg-26
18.96 + 2.5 + 2.86 = 24.32u
which of the following atoms is most likely to bond with another atom?
Answers
Answer:
c. chlorine, with an outer electron shell filled with 7 of a possible 8 electrons
Explanation:
Hope this helps!
The structure in the option A has 7 electrons in the outer shell of its electronic configuration , is unstable and so is most likely to form bond with another atom.
What is electronic configuration ?Electrons are arranged in various shells around the nucleus , this arrangement is called electronic structure or configuration.
Each shell can occupy certain fixed number of electrons.
Beside Option A , all the other configurations show stable structures as the last shell has eight electrons and are stable according to the octet rule.
The structure in the option A has 7 electrons in the shell and so is most likely to form bond with another atom.
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Atomic Number
Atomic Mass Number
Protons
Neutrons
Electrons
Charge
Element 1
6
12
A
6
6
B
Element 2
6
13
6
C
D
1+
Look at the above table.
What charge (B) should Element 1 have
Question 2 options:
0
6
12
1+
Answers
Answer:
B for element 1 0 charge
Explanation:
Atomic Number
Atomic Mass Number
Protons
Neutrons
Electrons
Charge
Element 1
6
12
A
6
6
B
Element 2
6
13
6
C
D
1+
Look at the above table.
What charge (B) should Element 1 have
Question 2 options:
0
6
12
1+
from the data we can construct the following table
element 1 element 2
Atomic # 6 6
Atomic mass 12 13
protons 6 6
neutrons 6 7
electrons 6 5
charge 0 +1
the atomic # of both is 6, so they are both carbon with 6 protons
element 1 has a total of protons plus neutrons of 12, element 2 of 13
so element 1 has 6 neutrons,element 2 has 7
element 2 has a +1 charge with 6 protons, so it has only 5 negative electrons
element 1 with 6 protons has 6 electrons, so it has a 0 charge
An example of a cell is a ____________ cell.
Answers
Answer:
Prokaryotic / Eukaryotic
Oxygen cannot be broken
down into a different
substance. What can we call
oxygen?
Answers
Answer:
• Oxygen is an element
Answer:
We can call it an element.
Which of the following is the best explanation for the fact that crushing increases the rate at which a solid dissolves in a liquid?
Select one:
a. The temperature of the solution is increased when the solid is crushed.
b. The surface area of the solute is increased when it is crushed.
c. Crushing increases the amount of solute present.
d. Crushing makes stirring the solution easier.
Answers
true or False
sound needs a medium to travel
Answers
Answer:
True or T
Explanation:
Is the correct answer please make me brainliest
A compound formed from a metal and a non-metal will have which type of bond?
A. Covalent
B. Hydrogen
C. Ionic
D. Atomic
Answers
it's an ionic bond
btw i love your profile picture never understand is one of my favorites
Ionic bond
why is stability of compounds essential
Answers
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:
