Answer:
b. heat energy
Explanation:
The domino at the end of the row move should be heat energy.
What is heat energy?Heat energy refers to the energy where it leads to the small particles movement. It can be treated as the atoms, molecules, etc. Also, the one object to other object should be shifted in this. Since the student placed one hundred dominoes upright in a row so here the heat energy should be used.
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6. The proper combination of temperature, water, and oxygen
Answer:
electrolytic reaction; oxygen and hydrogen combine to form water, producing electrical energy and releasing heat.
Explanation:
Find the density of an object that has a mass of 66 g and a volume of 10 cm?
a.)660 g
b.)6.6 g/cm^3
c.)0.15 cm 3/g
d.)6.6 cm 3/g
Answer:
B
Explanation:
Density = mass / volume
66 grams / 10 cm = 6.6 g per cubic cm
Balance the chemical equation. Based on the equation, how many grams of chlorine are produced when the sodium chloride decomposes and produces 19.5 grams of sodium? Use the periodic table to get the weights of the elements.
Drag the labels to the correct locations to complete the analysis. Each label can be used more than once.
]
Answer:
Answer is in the photo
Explanation:
Have a nice day and if the photo isn’t visible let me know! :)
The balance chemical equation is as,
[tex]2NaCl[/tex] → [tex]2Na + Cl_{2}[/tex]
The 30.1 grams of chlorine are produced when the sodium chloride decomposes and produces 19.5 grams of sodium.
Calculation,
22.99 g of sodium present in 1 mole of sodium atom.
In 19.5 g of sodium = 19.5 g× 1 mole / 22.99 g = 0.85 mole
The mole ratio = 2:1
It means 2 mole of sodium produce along with 1 mole of chlorine when sodium chloride decomposed.
So, number of mole of chlorine when 0.84 mole of sodium produce = 0.85 mole×1 mole/ 2 mole = 0.424 mole
number of mole of chlorine = given mass/molar mass of [tex]Cl_{2}[/tex] = 0.424
Given mass of [tex]Cl_{2}[/tex] = molar mass of [tex]Cl_{2}[/tex]× number of moles of [tex]Cl_{2}[/tex] = 70.9×0.424 = 30.1 gram
What is balanced chemical equation?The symbolic representation in which number of atoms in reactant side is equal to number of atoms in product side.
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What are the coefficients that would correctly balance this equation? ____Zn + ____K₂CrO₄→ ____K + ____ZnCrO₄
Answer:
Zn + K2CrO4 -----> 2K + ZnCrO4
Explanation:
What 58x999what is fifty eight times 999
Answer:
58x999 is equal to 57,942
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HELP!!! An experiment was conducted to determine if the intermolecular forces in two liquids affects their boiling points. Each liquid was sprayed on a paper towel. Each
paper towel was wiped across a glass table to moisten the surface. The table shows a partial record of the experiment.
Experimental Record
Liquid Intermolecular Forces ?
А
relatively strong
B
relatively weak
What information should be recorded in the last column of the table?
Time taken by the liquids to start boiling
Time taken by the glass surface to dry
Volume of liquid required to moisten the paper towels
Time taken by the paper towels to become completely moist
Answer: it would be b time taken by the glass surface to dry
Explanation:
i had took the test and i got it right
Answer:
B: Time taken by the glass surface to dry
Explanation:
because if you go to a store and buy two different brands like for example you but windex or invisible glass then you can say for example if i use windex it will dry faster and with invisible glass i will take longer to dry but if you use windex witch drys faster then you will not have streaks on the table when someone sits. and i also got it right
help? It’s question 9
Answer:
a
Explanation:
its a
What kind of waves can travel through a vacuum?
Mechanical waves
Electromagnetic waves
All of the above
None of the above
Please help ASAP
Answer:
electromagnetic wave
Explanation:
Electromagnetic waves differ from mechanical waves in that they do not require a medium to propagate.
plzzz helppp!!!
How long would it take you to travel 8 miles at a speed of 1 mile per hour?
Answer:
It would take you 8 hours.
Explanation:
This would take you 8 hours because you are going 1 mile an hour. So in 1 hour, you would have gone 1 mile.
A problem is usually posed in the form of
A Experiment
B Method
C Question
Answer:
A i did it on edge
Explanation:
Aaaaaaaaaaaaaaa
The third step in the Decision Making process is to list your pros and cons for each option.
A pro and Con is ___________about each option.
A
Something positive and negative
B
Something positive
C
Something negative
D
None of the answers
Answer:
A. Something positive and negative
Explanation:
the numerus rocks orbiting the sun between jupiter and mars are classified as----
difference between shell and subshell?
NEED HELP PLSSS
Compound A has a mass of 20.00 u. Compound B has a mass of 60.00 u. How will the number of molecules in 5.00 g of Compound A compare to the number of molecules in 15.00 g of Compound B
1. How many atoms are in 3.5 moles of nickel?
The number is 6.022 x 10^23 atoms/mol.
Look at the following equation.
_N2 + _H2 - _NH3
In order to follow the law of conservation of mass, this equation must have which set of coefficients, in order from left to right?
A.
1,3,2
B.
3, 3, 1
C.
2,2,2
D.
2,3,1
Answer:
A
Explanation:
_N2 + _H2 - _NH3
LHS RHS
N=2×1=2 N=1×2=2
H=2×3=6 H=3×2=6
1,3,2
Need answer immediately. For college homework. Organic Chemistry.
Here's the question written out so others can find it if they need:
Provide a structure for the following compound: C6H16N2; IR: 3281 cm–1; 1H NMR: δ 1.1 (8H, t, J = 7 Hz), δ 2.66 (4H, q, J = 7 Hz), δ 2.83 (4H, s). (Hint: The triplet at δ 1.1 conceals another broad resonance that contributes to the integral.)
THIS IS THE ANSWER: CH3-CH2-NH-CH2-CH2-NH-CH2-CH3
I hope this helps! Please give Brainliest if you feel this helped. Have a good day and a good rest of your 2021, best of luck with your classes.
Answer:
the answer is below.
Explanation:
CH3-CH2-NH-CH2-CH2-NH-CH2-CH3
In the chemical reaction below, sodium would be considered a 2Na + Cl2 --> 2 NaCl O catalyst O intermediate product restant
Answer:
Reactant
Explanation:
The chemical expression is given as:
2Na + Cl₂ → 2NaCl
The species on the left hand side which are Na and Cl₂ are referred to as the reactants.
The specie on the right hand side, NaCl is the product of the reaction.
There is no catalyst shown in this reaction.
Such a reaction as this is called a combination reaction or synthesis reaction in which two reactants gives rise to a product.
Can someone plz help me :
Answer:
B
Explanation:
A arrow sign is -->
A equal sign is =
And, the plus sign is +
Which means the only option left is B Coefficient!
Hope this helps!
Why do people say air is a poor conductor , but isn't conduction happens in solid?
Explanation:
It is mainly the very low density of gases that make them bad conductors of heat. In liquids and solids atoms and molecules are densely packed and transfer of energy has much smaller distances to happen.
hope it helps u
Kinetic energy is energy of motion. What below is considered to be a form of kinetic energy?
Answer:
In physics, the kinetic energy of an object is the energy that it possesses due to its motion It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity Having gained this energy during its acceleration the body maintains this kinetic energy unless its speed changes
Example:
A semi-truck travelling down the road
A river flowing at a certain speed
What drives convection currents in the atmosphere?
A. Heat from Earth's core
B. Jake from State Farm
C. The Sun
Answer:
a I guess
Explanation:
BRAINLIEST FOR THE FIRST ANSWER How are isotopes used in industry?
Answer: Radioisotopes are used by manufacturers as tracers to monitor fluid flow and filtration, detect leaks, and gauge engine wear and corrosion of process equipment. Small concentrations of short-lived isotopes can be detected whilst no residues remain in the environment.
Explanation: Uranium-235 is used for nuclear fission and as a fuel in nuclear reactors.
An isotope of cobalt is used in the treatment of cancer.
An isotope of iodine is used in the treatment of goiter.
Ideal Gas Law Test
11 have 1.9 moles of gas held at a pressure of 5 atm and in a container with a volume of S0 liters, what is the temperature of the gas?
O 1603 K
O 273 K
O 0.0006
O 0.0006 K
Answer:
T = 1603 K
Explanation:
Given data:
Number of moles of gas = 1.9 mol
Temperature of gas = ?
Pressure of gas = 5 atm
Volume of gas = 50 L
Solution:
The given problem will be solve by using general gas equation,
PV = nRT
P= Pressure
V = volume
n = number of moles
R = general gas constant = 0.0821 atm.L/ mol.K
T = temperature in kelvin
By putting values,
5 atm × 50 L = 1.9 mol × 0.0821 atm.L/ mol.K × T
T = 250 atm.L / 1.9 mol × 0.0821 atm.L/ mol.K
T = 250 atm.L /0.156 atm.L/K
T = 1603 K
Identify the following as physical (P) or chemical (C) changes.
1. NaCl (Table Salt) dissolves in water. ______
2. Milk sours. _____
3. Ag (Silver) tarnishes. ______
4. Sugar dissolves in water. _____
5. Wood rots. _____
6. Heat changes H2O to steam. ______
7. Baking soda reacts to vinegar. ______
8. Iron (Fe) rusts_____
Answer:
1. chemical
2. chemical
3. chemical
4. physical
5. chemical
6. physical
7. chemical
8. chemical
Answer:
All are correct
Explanation:
I agree with all except the first one
what type of chemical reaction is it
Answer: It's chemical
Explanation:
Because it's chemical :))
How can an organic compound exist without single bonds between the carbons?
Answer:
Carbon atoms can form double bonds by sharing two pairs of electrons; they can also form triple bonds by sharing three pairs of electrons.
Carbon atoms can form double bonds by sharing two pairs of electrons; they can also form triple bonds by sharing three pairs of electrons.
What is an organic compound?An organic compound is any of a large class of chemical compounds in which one or more atoms of carbon are covalently linked to atoms of other elements, most commonly hydrogen, oxygen, or nitrogen.
A carbon atom can participate in a maximum of four bonds; either four single bonds, two single bonds and a double bond, or one single bond and a triple bond.
A double bond is formed when two atoms use two electron pairs to form two covalent bonds; a triple bond results when two atoms share three electron pairs to form three covalent bonds.
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What kind of reaction is this
Na2O + CO2 → Na2CO3
Answer:
Explanation:
Na 2O + CO 2 → Na 2CO. 3
This is an acid-base reaction (neutralization): Na 2O is a base, CO 2 is an acid.
Hope this helps!!!!!!
Brainlist please
The reaction of N₂O with CO₂ giving Na₂CO₃ is a combination reaction, where two reactants combines to form a product.
What are types of reactions?There are different kinds of reactions namely, displacement reactions, combination reactions, decomposition reaction etc.
The reaction in which one reactant species displace the constituent group of another reactant it is termed as displacement reactions. On decomposition reaction, one reactant decomposes into two or more products.
In a single displacement reaction, one of the group is displaced to form a new product and in double displacement reactions, two species from reactant side are displaced.
Similarly, a reaction in which two reactants simply combines to form a product is termed as combination reaction.
Therefore, the type of the given reaction is combination.
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A car traveled 210 km in 3.5 hours. What was its average speed in km per hour?
OA. 60
OB. 70
OC. 40
OD. 75
Answer:
A) 60
Explanation:
Given data:
Distance traveled by car = 210 km
Time taken = 3.5 hour
Speed of car = ?
Solution:
Formula:
S = d/t
s = speed of car
d = distance
t = time
by putting values,
s = 210 km / 3.5 hour
s = 60 km/hour
5 is equal to 4 times that number
