Answer:
Altogether for both models; two red jellybeans, two white jellybeans, two black jellybeans and six blue jellybeans.
Note: Since no specific color was stated for oxygen atoms, the answer assigns blue colored jellybeans to represent oxygen atoms.J
Explanation:
Sodium bicarbonate, NaHCO₃ is a compound composed of one atom of sodium, one atom of hydrogen, one atom of carbon and three atoms of oxygen.
Since red jellybeans represent sodium atoms, white jellybeans represent hydrogen atoms, black jellybeans represent carbon atoms and blue jellybeans represent oxygen atoms, each of the two students will require the following number of each jellybean for their model of sodium carbonate: One red jellybean, one white jellybean, one black jellybean and three blue jellybeans.
Altogether for both models; two red jellybeans, two white jellybeans, two black jellybeans and six blue jellybeans.
change word equation into chemical equation.
a Calcium carbonate -----> Calcium oxide + Carbon dioxide
b Zinc + Sulphuric acid -----> Zinc sulphate + Hydrogen
Answer:
Ca(CO3) --> CaO + CO2
Zn + H2SO4 --> ZnSO4 + 2H2
Explanation:
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the amount of carbWhat is your carbon footprint?
the amount of carbon dioxide you use when recycling
the amount of oxygen put into the atmosphere due to your consumption of fossil fuels
the amount of carbon dioxide and oxygen in the atmosphere at any given time
the amount of carbon dioxide put into the atmosphere due to your consumption of fossil fuelson dioxide put into the atmosphere due to y
Answer:
D
Explanation:
The way that light waves interact with different mediums is called the ____________
how long does it take to find out that you just want to stuff your face in chocolate
Answer:
no to long
Explanation:
thanks for the points
A graduated cylinder is filled to 10.0 mL with water and a piece of granite is placed in the cylinder displacing the level to 23.7mL . what is the volume of the granite piece in cubic centimeters?
Answer:
13.7 cubic centimeters
Explanation:
23.7-10=13.7mL
A 1250.0g block of silver at 1oC is placed in 2.6g of water vapor at 102oC. What is the equilibrium temperature of the two substances? Specific Heat of Ag is 0.235J/goC
Please answer with work shown
Answer:
Explanation:
Let final temperature be T .
vapor is at 102⁰C
loss of heat by vapor in turning into water at 100⁰C
= 2.6 x 2 x 1.996 + 2.6 x 2260 = 5886.37 J
loss of heat to lower temperature to T
2.6 x 4.186 x ( 100 - T )
1088.36 - 10.88 T
Total heat loss = 5886.37 + 1088.36 - 10.88 T
= 6974.73 - 10.88 T
heat gain by silver to gain temperature from 1⁰C to T⁰C
= 1250 x ( T - 1 ) x .235 = 293.75 T - 293.75
heat gain = heat loss
293.75 T - 293.75 = 6974.73 - 10.88 T
304.63 T = 7268.48
T = 23.86°C .
___________ elements are naturally unstable as they break down over time to more stable forms.
Answer:
Radioactive elements
Explanation:
What is involved in weathering?
Answer:
the answer is water.Hope this helps
Two atoms in the same molecule are linked together by a
chemical ______
Answer: Chemical bond. Two atoms in the same molecule are linked together by a chemical bond. Write "bond" in the blank.
Two atoms in the same molecule are linked together by a chemical bond.
What is chemical bond ?A chemical bond is defined as the formation of a chemical compound by the union of two or multiple atoms, ions, or molecules, the firmness can be evaluated by the type of its chemical bond.
Ionic Bond is a type of chemical bond where relocation of electrons from one atom to alternative atom, one atom creates a negative charge called as anion while another atom creates a positive charge called cation.
The covalent bond defines the distribution of electrons among atoms, it can be either polar or non polar in nature and the electrons are united unevenly in polar covalent chemical bonding.
Hydrogen Bonding is a fragile procedure of chemical bonding, this type of polar covalent bonding occur between oxygen and hydrogen where hydrogen develops a partial positive charge in the formation of the water.
Learn more about chemical bond , here:
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what is the difference between a galvanic cell and an electrolytic cell? APEX
Answer:
A. A galvanic cell generates electrical current, and an electrolytic cell uses electrical energy to cause redox reactions to occur.
Explanation:
A galvanic cell produces electrical energy through the conversion of chemical energy whereas the electrolytic cell carries out the conversion of the electrical energy/current supplied to it into chemical energy. The reaction that takes place in the galvanic cell is spontaneous which is responsible for the electrical energy that is produced. The redox reaction in the electrolytic cell is not spontaneous. Electrical energy has to be supplied to it in order to initiate the reaction.
Identify each of the changes listed below as chemical or physical.
Evaporation of Water ________________
Digesting Food ______________________
Rotting Wood ______________________
Rusting Car ______________________
Drying Clothes ______________________
Souring Milk ______________________
Baking a Cake ______________________
A balloon has a volume of 125mL with 10 pumps of gas. The balloon is reduced in volume to 88mL, how much gas is in the balloon?
Answer:
7.04
Explanation:
i think
Order the masses from smallest to largest
Can someone please tell me if this right.
Answer:
1. 7.86 × 10⁴ g
2. 7.86 × 10⁴ kg
3. 1.989 × 10¹³ mg
4. 1.989 × 10²⁸ kg
5. 1.989 × 10³³ g
Explanation:
The easiest way to make sure you have the right answer is to convert all units to the same unit.
A. 1.989 × 10¹³ mg = 1.989 × 10¹⁰ g
B. 7.86 × 10⁴ g
C. 1.989 × 10³³ g
D. 7.86 × 10⁴ kg = 7.86 × 10⁷ g
E. 1.989 × 10²⁸ kg = 1.989 × 10³¹
The correct order is B < D < A < E < C
Which ecosystem is the least stable?
Answer:
tundra bc it has barley any food source and has vary little inhabitants
Explanation:
Answer:
a patch of lichens on bare rock
A substance absorbed 895 J and caused its temperature to increase by 10 ºC. If the substance has a mass of 27.9 g, what is the substance's specific heat in J/(gºC) ?
1.) 3.21
2.) 4.62
3.) 1,406.25
4.) 249,705
Answer:
i dont get the equation sorry wish i can help
how to convert 12g of nitrogen gas in mole
Answer:
it takes more than 12g of nitrogen gas to make a mole
Answer:
0.86 mol N
Explanation:
To convert between grams and moles, you need the molar mass of the substance. The molar mass of nitrogen is 14.01g/mol. This is used as the unit converter.
[tex]12gN*\frac{1molN}{14.01gN} = 0.85653 mol N[/tex]
Then round the answer to the lowest number of significant figures = 0.86 mol N.
Balance the following chemical equations
Answer:
1) 3Fe + 2O(2, this is the subscript) - Fe(3)O(4)
2) 2Sr + O(2) - 2SrO
3) Sn + 2NaOH - Na(2)SnO(2) + H(2)
4) 2K + Br(2) -2KBr
5) 2C(8)H(18) + 25O(2) - 16CO(2) + 18H(2)O
PLEASE HURRY!!!
If a substance has a high PH, it will feel__________.
If a substance has low PH, it will taste__________.
Answer:
high ph -basic,low pH -acidic
Explanation:
hi I'm from India nice to meet you
The characteristic bright–line spectrum of potassium is produced when electrons
A) jump to higher energy levels
B) return to lower energy levels
C) are lost by neutral potassium atoms
D) are gained by neutral potassium atoms
E) are released from the nucleus
Answer: B.
Explanation:
When the electron changes levels, it decreases energy and the atom emits photons. The photon is emitted with the electron moving from a higher energy level to a lower energy level. The energy of the photon is the exact energy that is lost by the electron moving to its lower energy level.
Hope this helps!
How do spores help the survival of spore-bearing plant?
Answer:
When weather conditions are ideal, some ferns, algae, moss,and even fungi, release spores into the air, often carried by the wind, by insects or birds until they land. Spores contain both male and female reproductive organs, which allows these plants to replicate themselves in a form of cloning.
Explanation:
How many atoms are there in 10.2 moles of Phosphorous?
There are 2.06 x 10²⁴ atoms
Further explanationThe mole is the number of particles (atoms, molecules, ions)contained in a substance
1 mol = 6.02.10²³ particles
Moles can also be determined from the amount of substance mass and its molar mass
number of atoms :
[tex]\tt 10.2\times 6.02\times 106{23}=2.06\times 10^{24}[/tex]
Which of the following land- forms is the result of wind depo- sition? a. deflation hollow b. desert pavement c. dune d. abrasion
Answer:
Coastal regions are often affected by abrasion. What process would cause increased abrasion along a costalregion? Abrasion is physical weathering caused by water, wind and gravity. The coastal regions areaffected by abrasion due to large volumes of water and increasedwinds.
Explanation:
I I hope this answer is Wright
Please help!! I don’t know how to do this I need help ASAP
Answer:
Explanation:
why neon has zero valency?
Answer:
hope it helps you
Explanation:
Helium has two electrons in its energy shell, while argon and neon have 8 electrons in their valence shells. As these have maximum number of electrons in their valence shells, they do not have any tendency to combine with other elements. Hence, they have a valency equal to zero.
Does anybody understand this I’m stuck
Answer:
it's the first one
Explanation:
can you help me too
What characteristics do atoms of manganese- 55, iron-56, and nickel-58 have in common?
Answer:
same number of protons differnt number of nuetrons
Explanation:
Atoms of manganese- 55, iron-56, and nickel-58 have same number of neutrons and different number of protons.
Number of protons:It is same as the atomic number of an element.
Number of Neutrons:It is the difference between the mass number and atomic number or number of protons.
Manganese- 55:No. of protons = 25
No. of neutrons = 30
Iron-56:No. of protons = 26
No. of neutrons = 30
Nickel-58:No. of protons = 28
No. of neutrons = 30
Thus, the number of neutrons in all the atoms is same i.e. 30.
Find more information about Neutrons here:
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4. Advection fog forms when warm moist air comes in from the Pacific Ocean and
blows over the cold California current.
A.True
B.False
Answer:
A, True
Explanation:
Which example illustrates a chemical change
shredding paper
smashing a soda can
burning wood
chopping wood
10.0 J of energy is required to increase the temperature of 1 g of water by 10oC. What is this value in calories? In kcal?
10 J = 2.39 cal = 2.39 x 10⁻³ kcal
Further explanationThe joule is one unit of energy. energy itself can be expressed in units such as calories, BTU, kg⋅m²s⁻²
An example of energy calculation is the calculation of heat in heat transfer
Heat can be calculated using the formula:
Q = mc∆T
Q = heat, J
m = mass, g
c = specific heat, joules / g ° C
∆T = temperature difference, ° C / K
10 J if we convert into calories and kcal
[tex]\tt 1~J= 0.239~cal\\\\10~J=2.39~cal\\\\2.39~cal=2.39\times 10^{-3}~kcal[/tex]
How many molecules are there in 0.5 moles of C2H6?
Answer:
3
Explanation: