Answer:
c. they carry energy is the answer
Answer:
C. they carry energy
Explanation:
Energy can be carried from one place to another by waves, including water, light, and sound waves. Waves are oscillating disturbances that travel through but do not move matter.
Infrared radiation escaping from hot coals is an example of invisible waves carrying energy. This energy can be felt as heat.
Describe the two types of mechanical energy
Answer:
Kinetic energy and potential energy
Explanation:
kinetic energy is when the energy is active and potential energy is when it is about to be active
7. Which of the following changes could be associated with either a chemical change OR a
physical change?
a. The change cannot be reversed
b. Bending of metal
c. New substances formed
d. Change in color
Answer:
a: chemical change because the change cannot be reversed.
b: physical change because the action can be reversed.
c: chemical change.
d:chemical change.
any change that cannot be reversed is a chemical change and any change that can be reversed is a physical change.
which is not a redox reaction?
a. Formation of ammonium sulphate from ammonia and sulphuric acid
b. formation of nitrogen monoxide from ammonia
c. formation of sulphuric acid from sulphur
d. formation of zinc from zinc sulphide
help me please
Answer:
D. formation of zinc from zinc sulphide
Explanation:
A redox reaction could be explained as an artificial reaction in which electrons are moved between two reactants partaking in it. This substitution of electrons can be recognized by examining the variations in the oxidation states of the reacting classes. The generation of hydrogen fluoride is an illustration of a redox reaction. We can crack the reaction down to investigate the oxidation and loss of reactants.
Which of these products was made using a renewable resource?
O A. Paper plate
O B. Aluminum can
O C. Copper pan
O D. Plastic bag
Answer:
paper plate
Explanation:
A renuable source is a source that would replenish in ones lifetime. Trees make paper and grow in the span of a average human life.
write a balanced equation for the process of photosynthesis
Answer:
the answer is
Explanation:
6CO2 + 6H2O — > C6H12O6 + 6O2.
Answer: 6CO2 + 6H2O ---> C6H12O6 +6O2
sunlight
Couldn't do subscripts on my phone, but you probably know to put the 2s like that anyway, glad to help.
Explanation: The amount of matter that you start with you end with so you will have 6 carbon dioxide molecules and 6 water molecules and end up with the same amount of matter in your products, according to the law of conservation of matter.
What I need help fast!
Which statement describes effusion?
C D
It occurs when a gas passes through a tiny hole.
O It occurs when a liquid passes through a tiny hole.
O It occurs when gas molecules disperse throughout a container.
It occurs when a liquid disperses throughout a container.
Answer:
I think it's A because effusion is a gas escaping from a tiny hole
Explanation:
I just finished the test and got it right :)
Answer:
A on edge 2020
Explanation:
I took the test and got 100, hope this helps:)
Can someone please help me with this?-- 18 pts!
2C10H11NO4 + 2H2O → C16H10N2O2 + 2C2H4O2 + 4H2O
In this reaction, 1.87 g of indigo (C16H10N2O2) are produced.
If the theoretical yield is 2.35 g of C16H10N2O2, what is the percent yield of indigo?
Round to the nearest decimal.
The percent yield of indigo : 79.6%
Further explanationPercent yield is the comparison of the amount of product obtained from a reaction with the amount you calculated
General formula:
Percent yield = (Actual yield / theoretical yield )x 100%
An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients
Reaction
2C₁₀H₁₁NO₄ + 2H₂O → C₁₆H₁₀N₂O₂ + 2C₂H₄O₂ + 4H₂O
Actual yield = 1.87 g
Theoretical yield = 2.35 g
The percent yield of indigo :
[tex]\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{1.87}{2.35}\times 100\%=\boxed{\bold{79.6\%}}[/tex]
what is El Nino and La Nina, and how are they different?
Answer:
El Niño refers to the above-average sea-surface temperatures that periodically develop across the east-central equatorial Pacific. It represents the warm phase of the ENSO cycle. La Niña refers to the periodic cooling of sea-surface temperatures across the east-central equatorial Pacific.
Calculate the molecular mass of the following mass of the following chemical compound
C6H12O6
24 G/mol
180 gmol
155 g/mol
19 g/mol
Answer:
132g/mol
Explanation:
Given compound:
C₆H₁₂O₆
Molecular mass of the compound.
This is the sum of the atomic masses of the given elements in the compound;
C = 12
H = 12
O = 6
Molecular mass = 6(12) + 12(1) + 6(16) = 180g/mol
2.
Which one of the following substances is a compound?
A. Hydrogen
B. Tron
C. Oxygen
D. Sodium fluoride
Explain your answer:
This is the balanced chemical equation for a reaction
between acetic acid (in vinegar) and sodium bicarbonate
(in baking soda).
C,H,O, + NaHCo, NaC,H,O, + H2O + CO2
Acetic acid
Water
Sodium
bicarbonate
Sodium
acetate
Carbon
dioxide
How does this balanced chemical equation represent the conservation of
matter in the chemical reaction?
O A. The coefficients are the same for each compound represented in
the reactants and products.
B. There are more carbon (C) atoms represented on the left-hand
side than on the right-hand side.
C. The amount of matter on the left-hand side is the same as the
amount of matter on the right-hand side.
D. There are more compounds on the right hand side than there are
on the left-hand side,
Answer:
C is the correct answer :)
Explanation:
In a balanced chemical equation, the amount of matter on the left-hand side of the chemical equation is the same as the amount of matter on the right-hand side. Therefore, option C is correct.
What is the balanced chemical equation?A balanced equation in which the number of atoms of each element is equal on the reactant, as well as the product side of the chemical equation.
The law of conservation of matter follows every balanced chemical equation. According to the law of conservation of matter, in a chemical reaction, matter can never be created or destroyed.
By obeying this law, the total amount of matter on the reactant side should be equal to the total amount of matter on the product side in a balanced chemical equation.
Given the reaction between acetic acid and sodium bicarbonate:
[tex]CH_3COOH + NaHCO_3\longrightarrow CH_3COONa +H_2O + CO_2[/tex]
The number of atoms of carbon, hydrogen, oxygen, and Na are equal on both sides of the reaction.
Learn more about the balanced chemical equation, here:
brainly.com/question/28294176
#SPJ2
______elements that have a longer half-life are more _______ than those that have a shorter half-life.
Answer:
Radioactive elements
Stable
Explanation:
Radioactive elements that have a longer half-life are more stable than those that a shorter half-life.
Half-life is the time taken for half of a radioactive element to decay by half of its original composition.
Now, if a substance have a long half-life, it is more stable and takes time to break down. For atoms with a short life, they are highly unstable and breaks down readily and easily.
Oops...
How can glass be a liquid if it's so hard?
Answer:
because yes
Explanation:
Answer:
When heated, glass can become a sort of liquid I guess :>
Explanation:
SOMEONE HELP ME PLEASE ILL GIVE BRAINLY!
Is the following picture an example of a chemical change or a physical change?
A chemical change, because the atoms are rearranging to form new molecules.
A physical change, because the molecules are staying the same.
A chemical change, because the molecules are staying the same.
A physical change, because the atoms are rearranging to form new molecules.
Answer:
It would be a physical change, because the atoms are rerranging to form new molecules!
Explanation:
A sample of CO2 weighing 86.34g contains how many molecules?
Answer:
1.181 × 10²⁴ molecules CO₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
86.34 g CO₂
Step 2: Identify Conversion
Avogadro's Number
Molar Mass of C - 12.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of CO₂ - 12.01 + 2(16.00) = 44.01 g/mol
Step 3: Convert
[tex]86.34 \ g \ CO_2(\frac{1 \ mol \ CO_2}{44.01 \ g \ CO_2} )(\frac{6.022 \cdot 10^{23} \ molecules \ CO_2}{1 \ mol \ CO_2} )[/tex] = 1.18141 × 10²⁴ molecules CO₂
Step 4: Check
We are given 4 sig figs. Follow sig fig rules and round.
1.18141 × 10²⁴ molecules CO₂ ≈ 1.181 × 10²⁴ molecules CO₂
What do you predict will happen with the
soap bubble when the bottle is placed into
the hot water?
state which separation method you would use to separate potassium iodine solution
PLEASE HELP ME !!!!!!!
Answer:
it would be 5,045
Explanation:
because it is closer to 5,000. pls correct me if wrong
When did the rabbit population reach carrying capacity
Answer: The rabbit population reached carrying capacity during the fourth year of the 10 years we set. Introduction: Population densityis the number of individuals in a population per unit of area. Some limiting factors only affect a population when its density reaches a certain level.
Explanation:
A weather balloon is inflated to a volume of 2.2 x 103 L with 374 g of helium. What is the density of helium in grams per liter?
Answer:
The answer is 0.17 g/LExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{374}{2.2 \times {10}^{3} } = \frac{17}{100} \\ [/tex]
We have the final answer as
0.17 g/LHope this helps you
CFCs were found to destroy what important compound in our atmosphere?
A: ozone
B: nitrogen
C: water vapor
D: helium
Answer:
A: ozone
Explanation:
Chlorofluorocarbons (CFCs) and hydrofluorocarbons (HCFCs) destroy ozone in the stratosphere.Answer:
A: ozone
Explanation:
right on EDGE 2021
The molar mass of a gas is 56 grams. What is its density at STP in grams per liter?
Answer:
d = 2.5 g/L
Explanation:
Given data:
Molar mass of gas = 56 g/mol
Density of gas = ?
Temperature = 273.15 K
Pressure = 1 atm
Solution:
Formula:
d = PM/RT
d = 1 atm × 56 g/mol / 0.0821 atm.L/mol.K ×273.15 K
d = 56 atm g/mol./ 22.42 atm.L/mol
d = 2.5 g/L
HUNK
FREE
IN PE
-05
HAE
-B. AFFEE
EMME
"Lanthanide serie
**Actinide series
Where are the non metals located
Answer:
What??? I don't understand.
Explanation:
why do large molecules seem to dissapear in the digestive system
Answer:
They must be dissolving.
Explanation:
Acid molecules must cling to remaining food molecules and slowly dissolve them.
if you could choose from having fire or ice powers, what would you choose?
Answer: I would choose ice
Ice is the solid state of water, a normally liquid substance that freezes to the slid state at temperatures of 0 °C (32 °F) or lower and expands to the gaseous state at temperatures of 100 °C (212 °F) or higer
Answer:
fire
Explanation:
just my opinion but.
If you have fire you could melt things and it defeats ice and ice is easily melted.
Fire is good in a "battle" too lol.
7. The atomic number equals the number of blank or blank in a stable atom of an element.
Answer:
Atomic Number
Neutral atoms of an element contain an equal number of protons and electrons. The number of protons determines an element's atomic number (Z) and distinguishes one element from another.
Explanation:
Below is a phase diagram for Carbon Dioxide. Use this diagram to answer the following question.
In this example we will start the Carbon Dioxide out at a temperature of -20oC and 1 atm of pressure. If the pressure was raised to 100 atm of pressure while still staying at -20oC, what phases would the Carbon Dioxide change between?
where was hydrogen discovered
Answer:
maybe greece
Explanation:
by henry cavendish in 1766
what particles are arranged in a regular pattern
Explanation:
Phases of Matter
Question Answer
Vaporization that occurs at and below the surface of a liquid boiling
A solid that is made up of crystals in which particles are arranged in a regular, repeating pattern crystalline solid
A solid made up of particles that are not arranged in a regular pattern amorphous solid