Answer:chain reaction
Explanation:
What do elements and compounds have in common? And how do they differ?
I will mark brainliest for the best answer.
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The shark and remora have a relationship that benefits the remora but neither helps nor harms the shark. What type of relationship is this?
commensalism
or
predation
or
mutualism
or
parasitism
Answer:
commensalism
Explanation:
It's not parasitism as the shark is not harmed in the relationship
How is activation energy represented on an energy diagram?
Energy
Reactants
Products
Reaction Progress
O A. Activation energy is the distance from the reactants to the top of
the "hill."
B. Activation energy is the distance from the top of the "hill to the
products.
O C. Activation energy is the final energy level of the product
molecules.
o
D. Activation energy is the starting energy level of the reactant
molecules.
In accordance with the diagram, activation energy is the distance from the reactants to the top of the "hill"
The activation energy represented on the energy diagram is as given as
"Activation energy is the distance from the reactant to the top of the hill"
So, the correct option is A.
What is activation energy?The minimum amount of energy required by the reactant to do the reaction is called activation energy.
To learn more about activation energy here.
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Most of the world’s energy comes from what three sources?
These energy sources are called ______________fuels and they are _____________________ resources.
Answers:
Most of the world’s energy comes from what three sources?
Oil, coal, and gas.
These energy sources are called fossil fuels and they are non-renewable resources.
Fuel type: oil
How it's formed: from the remains of ancient marine organisms
Its uses: transportation, industrial power, heating and lighting, lubricants, petrochemical industry, and use of by-products
Fule type: coal
How it's formed: when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial
Its uses: electricity generation, metal production, cement production, chemical production, gasification, and other industrial uses
Fuel type: gas
How it's formed: decomposed organic matter mixed with mud, silt, and sand on the seafloor
Its uses: heating & cooling buildings, cooking foods, fueling vehicles, and electricity generation
Balance C12H22011 → C + H2
Answer:
What is this?
Explanation:
PLEASE HELP ME NO LINKS
Answer: I don’t think the answer is A or C. Maybe B.
The word chemosynthesis means
the synthesis of organic compounds by bacteria or other living organisms using energy derived from reactions involving inorganic chemicals, typically in the absence of sunlight.
Explanation:
How does viscosity affect boiling point?
A. Higher viscosity = Lower boiling point
B. Lower viscosity = Higher boiling point
C. Higher viscosity = Higher boiling point
D. Viscosity has no effect on boiling point
Mass = 35g Volume = 7cm3 What is the Density?
Answer:
5 g/cm^3
Explanation:√3V=1.91293cm
Emu
Sparrow
How are emus and sparrows alike?
A. Both birds build nests in trees.
B. Both birds are taller than humans.
C. Both birds catch small animals while flying.
U
D. Both birds have a beak for breaking apart food.
How many times higher is the concentration of H+ in the Hubbard Brook sample than in unpolluted rainwater?
Answer:
1. 7 (a neutral solution)
Answer: 10-7= 0.0000001 moles per liter
2. 5.6 (unpolluted rainwater)
Answer: 10-5.6 = 0.0000025 moles per liter
3. 3.7 (first acid rain sample in North America)
Answer: 10-3.7 = 0.00020 moles per liter
The concentration of H+ in the Hubbard Brook sample is 0.00020/0.0000025, which is 80 times higher than the H+ concentration in unpolluted rainwater.
Explanation:
. I am described as being conductive, malleable, shiny, and reactive with HCl. I am one of the most reactive elements. I turn black within seconds when I am exposed to air. If someone drops water on me, I will explode. When I do explode I send off characteristic purple-red (violet) flame. Who am I?
Answer:
Potassium
Explanation:
Most reactive metal in the reactivity series
The element in the question is referred to the alkali metal which is known as Potassium
Potassium is a highly reactive metal and reacts with Hydrochloric acid to
form a salt known as Potassium chloride and hydrogen gas.
Hcl + K ⇒ Kcl₍s₎ + H₂₍g₎
Potassium has a white color but when it reacts with water it explodes and
gives out a purple-red color as a result of the high excitation of electrons.
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A 35 kg child is standing in a 70 kg boat resting on the water. The child jumps forward, away from the boat, pushing with a force of 500 N. After the jump, the boat moves backward.
What does this scenario show?
A. The boat does not exert a force to balance the 500 N force, causing the boat to move.
B. The water creates a frictionless surface, causing the boat to move without an action force.
C. The boat has a greater mass than the child but reacts to an action force.
D. The water beneath the boat absorbs the 500 N force but keeps the boat afloat.
Answer:
A
Explanation:
the boat does not have a force to counter act the boys it must give which means it moves cause it is one something that is not as dense as the boy (I THINK)
what is the molarity of 3.0 L solution containing 250 g of Nal
Answer: C. 0.57 M
Explanation:
Molarity= Moles/Vol
How many molecules are contained in 125 grams of oxygen
gas (O2)?
Answer:
i think its 62.50 :) hope this helped you out
5 The atoms of a certain element each contain 36 protons and 8 valence electrons. Which
statement correctly identifies this element and describes its chemical reactivity? (8.58)
A The element is krypton, Kr, and it is not very reactive.
B The element is chlorine, Cl, and it is highly reactive.
C The element is krypton, Kr, and it is highly reactive.
D The element is chlorine, Cl, and it is not very reactive.
Answer:
dfdfaxc b
Explanation:
how many grams is 3.49 moles NaCl
Answer:
m = 204.16 grams
Explanation:
Given that,
No. of moles, n = 3.49
Molar mass of NaCl, M = 58.5 g/mol
We need to find the mass of 3.49 moles NaCl. We know that,
[tex]n=\dfrac{m}{M}\\\\m=n\times M\\\\m=3.49 \times 58.5\\\\m=204.16\ g[/tex]
So, there are 204.16 grams in 3.49 moles NaCl.
Question
What is the name of the covalent compound with the formula P2N3?
Answer:
P2N5
Explanation:
you have to plus it 2 times
Sarah and Jim investigated the effect of temperature on the solubility of copper sulphate. They dissolved copper sulphate crystals in the same volume of water until no more would dissolve. They measured the mass of copper using water at different temperatures.
One of the mass readings appears to be wrong ( anomalous ) which reading is anomalous? Use the graph to help you.
Answer:
Explanation:
H m sarav
help? for me? yes? please?
Answer:
2 Mg + O2 -> 2 MgO
is a synthesis reaction.
Use the food web below to answer the following
question.
Frog
Red fox
Grasshopper
Weasel
Goldfinch
Great horned om
Clover
Deer mouse
Which group is not represerted in the food web?
A. producers
B. primary consumers
C. secondary consumers
D. decomposers
Answer:
uhm i believe its D hope i helped
Explanation:
Answer:
D. decomposers
how might using water somethimes require changing its original state?
Please help me ASAP I’m almost done.
Answer:
i think the answer is c
Explanation:
sorry if im wrong i am most likely wrong but ye
Write the formula for Zn+2 (SO4)-2
Answer:
Zn2 + SO4 = Zn2(SO4)2
Explanation:
A 1.00 L volume of gas at 35.0 °C exerts a pressure of 85.5 kPa. What will the pressure
be at 127 °C? Assume constant volume.
Answer:
111.03kPa = P₂
Explanation:
Gay Lussac's Law states that the pressure of a gas is directly proportional to the absolute temperature when volume remains constant.
The equation is:
P₁T₂ = P₂T₁
Where P is pressure and T absolute temperature of 1, initial state and 2, final state of the gas.
P₁ = 85.5kPa
T₂ = 127°C + 273.15 = 400.15K
P₂ = ?
T₁ = 35°C + 273.15 = 308.15K
P₁T₂ = P₂T₁
85.5kPa*400.15K = P₂*308.15K
111.03kPa = P₂Help me plss correct answer
Answer:
The answer is for your question is A
Consider the following balanced equation:
2KCIO3(s) → 2KCl(s) + 302(g)
How many moles of O2 will be obtained by decomposing
3.50 moles of KCIO3?
0.530 mole
O 3.00 moles
O 2.30 moles
5.25 moles
5.25 moles
General Formulas and Concepts:Chemistry
Atomic Structure
CompoundsMolesAqueous Solutions
States of matterStoichiometry
Analyzing reactions RxNUsing Dimensional AnalysisExplanation:Step 1: Define
[RxN - Balanced] 2KClO₃ (s) → 2KCl (s) + 3O₂ (g)
[Given] 3.50 mol KClO₃
[Solve] mol O₂
Step 2: Identify Conversions
[RxN] 2 mol KClO₃ (s) → 3 mol O₂ (g)
Step 3: Stoichiometry
[DA] Set up conversion: [tex]\displaystyle 3.50 \ mol \ KClO_3(\frac{3 \ mol \ O_2}{2 \ mol \ KClO_3})[/tex][DA} Multiply [Cancel out units]: [tex]\displaystyle 5.25 \ mol \ O_2[/tex]what is the difinition of the word democracy?
Answer:
Democracy/dɪˈmɒkrəsi/
--noun--
A system of government by the whole population or all the eligible members of a state, typically through elected representatives.
Gravitational potential energy depends on the
Answer:
Gravitational potential energy depends on an object's weight and its height above the ground (GPE = weight x height).Explanation:
how many ml of 12.0 m hcl are needed to prepare 1200 ml of a 0.10 M solution of hcl
This means that if you know how many moles of solute you have in the target solution, you also know how many moles of solute were present in the stock solution sample.
Use the molarity and volume of the target solution to determine how many moles of hydrochloric acid,
HCl
, you need in that solution
c
=
n
V
⇒
n
=
c
⋅
V
n
HCl
=
0.10 M
⋅
500
⋅
10
−
3
L
=
0.050 moles HCl
Now the question is - what volume of stock solution would contain this many moles of hydrochloric acid?
c
=
n
V
⇒
V
=
n
c
V
stock
=
0.050
moles
12
moles
L
=
0.0041667 L
I'll leave the answer rounded to two sig figs, despite the fact that you only gave one sig fig for the volume of the target solution
V
stock
=
4.2 mL.follow me
What effect could the pollution of Groundwater have on a nearby River, Lake or Stream?
Answer:
please give me brainlist and follow
Explanation:
Contamination of ground water can result in poor drinking water quality, loss of water supply, degraded surface water systems, high cleanup costs, high costs for alternative water supplies, and/or potential health problems. The consequences of contaminated ground water or degraded surface water are often serious.