Answer:
oxygen-carbon dioxide cycle
Animals and plants are connected to each other by the oxygen-carbon dioxide cycle. Plants need the carbon dioxide from animals to live and animals must have the oxygen from plants to survive.
Explanation:
hope this helped !
What reaction is zinc(s) + water(l) →
Answer:
Zn+H2O ------ ZnO + H2 is the correct answer
what are the main components of the circulatory system?
Answer:
The heart
Blood
Blood vessels
Explanation:
hope this helps
pls mark brainlest
Answer:
The heart, blood, and the blood vessels.
How many moles of silver would precipitate out when 3.6 x 10^23 atoms of zinc are combined in silver nitrate according to the following unbalanced equation? (Balance equation first!)
Zn + AgNO3 → Zn(NO3)2 +Ag
A: 1.67 moles
B: 1.2 moles
C: 3.34 moles
D: 0.6 moles
Can someone please help me with this I don’t get it at all.
Answer:
D: 0.6 moles
Explanation:
First we balance the equation:
Zn + AgNO₃ → Zn(NO₃)₂ + AgThere are two NO₃ species on the right side, so we put a two before AgNO₃:
Zn + 2AgNO₃ → Zn(NO₃)₂ + AgNow we put a two before Ag on the right, to balance the Ag atoms:
Zn + 2AgNO₃ → Zn(NO₃)₂ + 2AgThe equation is now balanced.
Now we convert 3.6x10²³ atoms of zinc to moles, using Avogadro's number:
3.6x10²³ atoms ÷ 6.023x10²³ atoms/mol = 0.6 molesThen we convert 0.6 moles of zinc into moles of silver, using the stoichiometric coefficients of the balanced equation:
0.6 mol Zn * [tex]\frac{1molAg}{1molZn}[/tex] = 0.6 mol AgThus the answer is option D.
5. Write a short explanation for why simple molecular substances have no electrical
conductivity. Include the words: electrons and ions
Aluminum has metallic bonds between its atoms. Which statement BEST describes the
valence electrons in aluminum?
are exchanged with nonmetal atoms
are exchanged with other metal atoms
are localized and stay between metal atoms
are delocalized and move between metal atoms
Look at picture
ASAP please will mark as brainlist don’t got much time
Answer:
are delocalized and move between metal atoms
Explanation:
As the problem says, aluminum has metallic bonds. The main characteristic of metallic bonds is that the electrons are free to move between the metal ions (they are delocalized), thus being responsible for the good electrical conductivity of metals.
what word means to bend light rays toward each other
What type of energy does most energy end up as?
O heat
O chemical
light
O electrical
Answer:
Heat
Explanation:
Which compounds can be made with the reaction benzene via electrophilic aromatic substitution using isopropyl chloride and AlCl3 as reagents (1 equivalent or excess).
Answer:
isopropyl benzene (cumene)
Explanation:
The reaction of isopropyl chloride and AlCl3 and benzene belongs to the class of organic reactions known as the Friedel Kraft alkylation.
The mechanism of the reaction involves the formation of a tetrahedral complex [AlCl4]^-.
The electrophile now is the isopropyl group which attacks the benzene to yield the product.
Which method of heat transfer can take place without matter? (3 points)
Conduction
Convection
Insulation
Radiation
Answer:
conduction
Explanation:
i hope this helps!!! :)
Answer:
Conduction
Explanation:
Two rabbit species, X and Y, live in an Arctic environment that is also populated by wolves. Species x turns white in the winter and
brown in the spring. Species y stays brown all year. The population of species X has slowly been increasing over the population of
species Y. What is most likely causing this population change?
Answer:
yy
Explanation:
14. A cell is placed in a salt solution that has the
same concentrations as the inside of the cell.
What will happen to the cell? *
A. The cell will shrink.
B. The cell will expand slightly.
O C. The cell will burst.
D. The cell will remain the same size.
Answer:
A
Explanation:
The reaction heated up 100 g of water in the beaker from 25 °C to 50.0 °C. The specific heat capacity of water is 4.184 J/g°C. Calculate the amount of heat energy that was released by the reaction.
Answer:
The amount of heat energy that was released by the reaction is 10,460 J.
Explanation:
Sensible heat is that which a body or an object receives or releases and causes its temperature to increase or decrease without affecting its molecular structure and therefore its state.
In other words, sensible heat is the amount of heat that a body absorbs or releases without any changes in its physical state (phase change). When a body is supplied or absorbed sensible heat, the temperature varies.
The equation that allows calculating heat exchanges is:
Q = c * m * ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case:
c= 4.184 [tex]\frac{J}{g*C}[/tex]m= 100 gΔT= Tfinal - Tinitial= 50 C - 25 C= 25 CReplacing:
Q= 4.184 [tex]\frac{J}{g*C}[/tex] *100 g* 25 C
Solving:
Q=10,460 J
The amount of heat energy that was released by the reaction is 10,460 J.
Step 5: Measure Pressure and Volume with the Weight
of the Book
Total the mass on the syringe. Record it in the
correct row of the data table.
Click and drag the book to increase pressure.
Click the syringe to zoom in and see the volume.
Answer:
0.498
Explanation:
because that is the right answer
Answer:
the answer is
498 g
.498 kg
Explanation:
FeCo2+NaCo3+Hg+Co2No3
Explanation:
the answer is sodium carbonate
How many molecules are there in 45.0 grams of CH4?
Answer:[tex]16.93\times 10^{23}\ \text{molecules}[/tex]
Explanation:
Given
Mass of [tex]CH_4[/tex] [tex]m=45\ gm[/tex]
Molar mass of [tex]CH_4[/tex] is [tex]12+4\times1=16[/tex]
No of moles of [tex]CH_4[/tex] [tex]=\dfrac{\text{Mass}}{\text{Molar mass}}=\frac{45}{16}[/tex]
No of Molecules in 45gm of [tex]CH_4[/tex] is
[tex]\Rightarrow N_A\times\frac{45}{16}=6.022\times 10^{23}\times \frac{45}{16}\\\Rightarrow 16.93\times10^{23}\ \text{molecules}[/tex]
True or False, according to the Megafauna Extinction Timeline, megafauna and humans arrived 50 thousand years ago?
Answer:
False
Explanation:
Megafauna are large animals that roamed the Earth during the Pleistocene Epoch, 1.6 million - 10,000 years ago.
2.
What is the percent composition of nickel in NiPO ?
Answer:
18.782% is the correct percent
ugh i don’t know:(
please help!!!
Pls help me i have been seeing people giving out the wrong answers on purpose and I just don't want that so pls
Answer:
B
Explanation:
Answer:
I think the answer is B. I need 20 characters but I can't think of anything else to type.
Describe the relationship between heat and the vibration of atoms (kinetic energy)
Answer:
As heat increases, kinetic energy will also increase.
Explanation:
As we heat a substance, the temperature will rise. The higher the temperature, the faster the molecules are moving.
You are growing a garden and notice that the soil is always wet. What type of soil do you have?
Sand
Silt
Clay
Loam
Answer:
Clay
Explanation:
clay does not allow water to flow
What is the pH for a solution that has an OH ion
concentration of 1.0 x 10^4 M?
Select one:
7
4
10
5
Calculate the amount of formula units in 2.10 moles of MgCl₂
Which nitrogen base sequence is the partner of C-A-T-C-G-A?
C-A-T-C-G-A
G-T-A-G-C-T
T-G-C-T-A-G
G-C-A-T-G-T
Answer:
The answer should be B. G-T-A-G-C-T
A pairs with T and G pairs with C.
Answer:
It's B, GTAGCT.
Explanation:
why does the second row of the periodic table have 8 elements
short asnwer:
here are 8 elements in period 2 because all those elements have electrons in the second shell and no electrons in the third shell.
Explanation:
There are certain rules for arranging atoms in shells 1) Maximum number of electrons in a shell is given by the formula 2n^2. 2) The outermost ( valence) shell can accomodate only 8 electrons.
Answer: the nubers ad up
Explanation:
you count like 12345678
What is te name of P2CL7
What is the pressure exerted by 32g of o2 in a 22.0L container at 30.0 degrees Celsius
Answer:
114 kPa
Explanation:
Lead (II) Acetate + Potassium Chromate
Answer:
SOMEONE HURRY AND ANSWER THIS
Explanation:
Melting and boiling point of water is high?
Answer:
Yes
Explanation:
Why melting and boiling point of water is high?
The reason for the high melting and boiling temperatures is the hydrogen bonding between water molecules that causes them to stick together and to resist being pulled apart which is what happens when ice melts and water boils to become a gas
Answer:
the temperature in the hydrogen bonding between water molecules that causes them to stick together which happens when ice melts and water boil to become a gas
Is a large body of flowing water ;created by many smaller flowing together. Aquifer
Answer:
alll I really know is that it includes smaller pools of water