Answer:
Exothermic reaction
Explanation:
Exothermic reaction is a reaction in which energy is evolved from the reaction to the surroundings
The following equation represents what type of chemical reaction?
2Ag + H2S → Ag2S + H2
A. Double Replacement
B. Single Replacement
C. Decomposition
D. Synthesis
Answer:
single replacement
Explanation: N/A
butane reacts with chlorine to form two isomers of chlorobutane. What type of reaction is this?
Which best explains why water has a high specific heat?
Answer:
The Presence of inter molecular hydrogen bonding makes it to heat at higher temperature as energy required to break them , hence the high specific heat
Which elements are;
a)solids,
b)liquids
c)gases
at 25°C
How do animal behaviors, such as hibernation or migration, enhance their survival?
Answer:
the reason a lot of animal ether hibernate is because they are escaping the cold or looking for food and the only reason we Humans don't hibernate is for two reasons. Firstly, our evolutionary ancestors were tropical animals with no history of hibernating: humans have only migrated into temperate and subarctic latitudes in the last hundred thousand years or so.
Explanation:
If we start with 20 atoms of plutonium – 239, how many would remain after 48,240 years?
The amount of atoms of plutonium – 239 that would remain after 48240 years is 5 atoms
How to determine the number of half-lives Half-life (t½) = 24100 yearsTime (t) = 48240 yearsNumber of half-lives (n) =?n = t / t½
n = 48240 / 24100
n = 2
How to determine the amount remaining Original amount (N₀) = 20 atomsNumber of half-lives (n) = 2Amount remaining (N) = ?N = N₀ / 2ⁿ
N = 20 / 2²
N = 20 / 4
N = 5 atoms
Learn more about half life:
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the particle that move around the nucleus is are
Answer:
electrons
The nucleus contains two types of subatomic particles, protons and neutrons. The protons have a positive electrical charge and the neutrons have no electrical charge. A third type of subatomic particle, electrons, move around the nucleus. The electrons have a negative electrical charge
Explanation:
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Please help me ty! Correct answers only ty
Answer:
Ca(NO3)2 + Na2C2O4 ---> <---- Ca + 2NO3 + 2Na + C2O4
A light-year is a way to measure ______ in space.
O time
Odistance
PLS HELPPPPPPPPPPPPPPPPPPPPPPPPPLLLLLPL
Answer:
Distance
Explanation:
The light-year is a measure of distance, not time. It is the total distance that a beam of light, moving in a straight line, travels in one year.
Answer:
distance pooh <3
Explanation:
Carbon’s valence?Thanks for answer
Answer:
as in valence electrons? 5.
Answer:
Carbon has 4 Valence electrons
copper sulphate solution turns the colour of litmus into red but litmus changes into blue with baking soda solution although both are salts. Give reason why?
Answer:
Copper sulphate is an acidic salt: It is the product of the reaction between a weak copper base and a strong acid , H2SO4
Litmus has a red colour in acidic solutions:
Conclusion: Acidic copper sulphate solution turns blue litmus to red
Baking soda is a basic salt : It is the reaction product of a weak acid , CO2 and a strong base , NaOH
Litmus has a blue colour in basic solutions:
Conclusion: basic baking soda solution turns red litmus to blue
Please please please someone give me the answers to all of these our teacher is very bad at explaining things and we are all confused i really need the answers please
Answer: #1 2Al + 2S - Al2S2
Explanation: You have to make sure there are 2 of each on each side
what is difference between dipole dipole interaction and hydrogen bonding
Answer:
A dipole-dipole force is when the positive side of a polar molecule attracts the negative side of another polar molecule.
A hydrogen bond is a dipole-dipole force and is an attraction between a slightly positive hydrogen on one molecule and a slightly negative atom on another molecule.
Answer:
Hydrogen bonds are dipole-dipole interactions in which at least one of the atoms involved is a hydrogen atom. Dipole-induced dipole bonds are those electric bonds that exist between a molecule with a permanent dipole moment and a molecule in which a temporary dipole moment has been induced.
[H+] for a solution is 1 x 10^-7 M. This solution is _____________.
A. acidic
B. basic
C. neutral
Answer:
the answer is C neutral
Explanation:
if the ph is lower then 7 its acidic
if its higher then 7 its basic
and a ph of 7 is neutral
What is this molecule an
example of?
A. an atom
B. a mixture
C. an element
D. a compound
PLEASE HELP ASAP
Answer:
D. Compounds
Explanation:
Because it's says that have 3 components
Why does lithium have a higher ionization energy compared to sodium?
Answer:
There are 11 protons in a sodium atom but only 3 in a lithium atom, so the nuclear charge is much greater. ... The only factor left is the extra distance between the outer electron and the nucleus in sodium's case. That lowers the ionization energy.
What chemicals must be cycled through a Martian environment in order for the planet to be habitable for life? Describe how scientists intend to make those resources available in such a harsh environment.
how many atoms are in 3.5 moles of arsenic atoms?
Answer:
1 mol of atoms = 6.022 ×1023 atoms. 3.5mol × 6.022 × 1023 atoms 1mol = 2.11 × 1024 atoms =.........
Explanation:
2160.64 atoms!
a two paragraph summary on how old is earth it's for science
Answer:
Explanation:
By dating the rocks in Earth's ever-changing crust, as well as the rocks in Earth's neighbors, such as the moon and visiting meteorites, scientists have calculated that Earth is 4.54 billion years old, with an error range of 50 million years
7. Why would it be difficult to measure the rate of reaction for the rusting of iron?
Answer:
For rusting, it is difficult to write an equation due to the complexity of the reaction. Thus, we can express the reaction like the following. According to the law of conservation of mass, the increased mass of nail and rust is the amount of oxygen.
Explanation:
I hope this helps:)
All generators need some source of energy to rotate the coil or magnets.
True or False
.energy mechanical needs it Answer:
Yes.
Explanation:
How many moles of gas are in a 30 liter scuba canister if the temperature
of the canister is 300 K and the pressure is 200 atmospheres?
Answer: the answer is n= 0.487 mol
Explanation: i took the test and got it right
A brand of soda has one of the highest quantities of sugar among popular soda drink packing 52 grams into each 12 oz can how many molecules of sugar are in one can of this soda
Answer:
9.0 × 10²² molecules of sugar (sucrose)
Explanation:
Step 1: Given and required data
Mass of sugar in each can of soda (m): 52 gMolecular formula of sugar (sucrose): C₁₂H₂₂O₁₁Molar mass of sucrose (M): 342.3 g/molStep 2: Calculate the moles of sugar (n) in each can
We will use the following expression.
n = m/M = 52 g / (342.3 g/mol) = 0.15 mol
Step 3: Calculate the molecules corresponding to 0.15 moles of sugar
We will use Avogadro's number: there are 6.02 × 10²³ molecules in 1 mole of molecules.
0.15 mol × 6.02 × 10²³ molecules/1 mol = 9.0 × 10²² molecules
Balance the folowing equation.
S + 02
ws
SO:
Answer:
s+o2=so2
Explanation:
i hope it will help u
What are three facts about facilitated diffusion?
Answer:
you need my help come over
Explanation:
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Answer:
we need to see the diagram
Explanation:
How many grams of sand (SiO,) would need to be weighed out to equal 0.3 moles?
i need help with this so try to help me out please
A small amount of liquid bromine is added to a container which is then sealed.
Br2 (l) " Br2 (g)
Answer:
This answer is....
Br2 (l)
What name is given to this type of diagram
Answer:
There's no graph attached to the question