Answer:
Heat is the transfer of energy. During energy transfer, the energy moves from the hotter object to the colder object. This means that the hotter object will cool down and the colder object will warm up. The energy transfer will continue until both objects are at the same temperature.
Explanation:
3rd law of thermodynamics..
2 Different Examples((Thnks))
Answer:
See explanation
Explanation:
The third law of thermodynamics states that "the entropy of a perfect crystal of a pure substance approaches zero as the temperature approaches zero" (Wikipedia).
One example of the third law of thermodynamics has to do with steam. Steam is gaseous water. Since it is a gas, its molecules are free to move around therefore its entropy is high. When the temperature of the steam is decreased below 100 degrees, the molecules of steam loose energy and turn into liquid water and do not move as freely as they did in the gaseous state. If the temperature is further decreased to yield ice at zero degrees, the molecules of water are "frozen" in their positions and the entropy of the system decreases to zero.
Also, the ions in ionic crystal solids move around when the substance is in solution or in molten state hence the substance conducts electricity. When the ionic substance is in solid state, the ions do not move about and the entropy of the solid system tends towards zero.
1. Which of these is NOT found in the nucleus of an atom?
neutrons
protons
electrons
the mass of the atom
Answer:
Electrons
Explanation:
Answer:
Electrons are not found in the nucleus for they are orbiting the atom.
Humans have developed ways to increase the of their
environment. true or false
Answer:
True......................had to do this because we need atleast 20 letters
How many moles of H 2 will I need to make 5 moles of NH3?
12 SSO
Answer:
7.5 moles of hydrogen is required
Explanation:
Given data:
Number of moles of H₂ needed = ?
Number of moles of NH₃ = 5 mol
Solution:
Chemical equation:
N₂ + 3H₂ → 2NH₃
Now we will compare the moles of ammonia and hydrogen.
NH₃ : H₂
2 : 3
5 : 3/2×5 = 7.5 mol
Thus, 7.5 moles of hydrogen is required.
Help me plzz and thank u
Answer:
the terminator because i did this test
What is the overall trend for ionization energy on the periodic chart?
Answer:
The general trend is for ionization energy to increase moving from left to right across an element period. Moving left to right across a period, atomic radius decreases, so electrons are more attracted to the (closer) nucleus.
Explanation:
Brainliest plz
Answer:
Ionization energy increases across the period and decreases down the group.
What do the letters ESM stand for?
Answer:
European stability mechanism
what does group 16 (oxygen family) have in common
Answer: here is your answer
Explanation:
The oxygen family consists of the elements that make up group 16 on the periodic table: oxygen, sulfur, selenium, tellurium, and polonium. These elements all have six electrons in their outermost energy level, accounting for some common chemical properties among them.
Answer:
they all have 6 valence electrons
Explanation:
all elements in group 16 have 6 valence electrons
3
Which two elements are the most abundant in the Earth's crust?
OA. iron and magnesium
B. iron and nickel
Oc. silicon and magnesium
OD. silicon and oxygen
Novomatlan
Yes
Answer:
Look at the properties of Oxygen and Silicon - the two most abundant elements in the Earth's crust - by clicking on their symbols on the Periodic Table.
Explanation:
Answer:
D. silicon and oxygen
Explanation:
The most abundant elements on the earth's crust are silicon and oxygen. Silicon and oxygen forms a wide range of silicate minerals they are found in the crust.
There are many silicates which are derived from the basal units of silicon and oxygen combining together. Other atoms or elements then combines with the silicate framework.
Oxygen is about 46% abundant in the crust whereas silicon takes about 28% to be the second most abundant element on the crust.
Silicate minerals abounds in rocks and within the soil.
What part of the atom contains the protons and neutrons?
Guys pleasee helpp 20 points
What is the percent composition of sodium in Na3PO4? Express your answer to one decimal place. No units required.
Answer:
42.07%
Explanation:
Molar mass of Na3PO4 = 23×3 + 31 +16×4
= 69+ 31+64= 164 g/mol
Mass of Na in this compound is 69
Percentage of sodium in sodium phosphate = 69/ 164×100
Percentage of Na = 42.07%
Which of the following is TRUE about an astronaut traveling from planet to planet?
The weight changes, but his or her mass does not.
The weight and mass both stay the same.
The weight and mass both change.
The mass changes, but his or her weight does not. PLEASE ANSWER QUICKLY
Answer:
The weight changes, but his or her mass does not.
Explanation:
The true statement from the given choices about an astronaut traveling from planet to planet is that the weight changes but his or her mass does not.
This is due to the difference in acceleration due gravity from one planet to the other.
Mass is the amount of matter present within a substance. Weight is the vertical force on a body due to its mass and acceleration due gravityGravity from one planet to the other differs significant and so is the weight.
Physical and chemical properties are used to describe and identify matter. Physical properties can be observed without changing the identity of the substance. Chemical properties can be observed by attempting to change the identity of a substance. What are two physical and chemical properties that you can use to help you identify a substance?
Extensive properties, such as mass and volume, depend on the amount of matter that is being measured. ... Both extensive and intensive properties are physical properties, which means they can be measured without changing the substance's chemical identity
What is the molality of a solution made by dissolving 2 moles of NaOH in 6 kg
of water?
A. 0.33 mol/kg
B. 12 mol/kg
C. 3 mol/kg
D. 2 mol/kg
The molality of a solution : m = 0.33 mol/kg
Further explanationGiven
2 moles of NaOH in 6 kg of water
Required
The molality
Solution
Molality shows how many moles are dissolved in every 1000 grams of solvent.
m = n x (1000/p)
m = Molality
n = number of moles of solute
p = solvent mass (grams)
Input the value :
solute : NaOH
solvent : water
m = 2 moles : 6 kg
m = 0.33 mol/kg
6. A father rabbit had long ears while the mother rabbit had short ears. Which of these statements
explains why one of the baby bunnies could have long ears?
a
The baby bunny inherited its copies of the gene for ear length from its father and not from
its mother. Those genes connect together to make its ears long.
b
The baby bunny inherited its copies of the gene for ear length from its father and not from
its mother. Just like its father's genes, those genes instruct for proteins that connect in
ways that make its ears long.
С
The baby bunny inherited one copy of the gene for ear length from its father and one copy
from its mother. That gene combination instructs for proteins that connect in ways that
make long ears.
d
The baby bunny inherited one copy of the gene for ear length from its father and one copy
from its mother. Those genes connect together to make its long ears.
Answer:
D if I’m correct
Explanation:
Which of the following is not a form of precipitation?
A
groundwater
B
balls of hail
C
sleet
D
snowflakes
A.
Reason: cuz i need points noob
Which of the following atoms would have a charge of +1?
An atom with 9 protons, 9 electrons, and 9 neutrons
An atom with 7 protons, 11 electrons, and 8 neutrons
An atom with 5 protons, 5 electrons, and 4 neutrons.
An atom with 6 protons, 5 electrons, and 7 neutrons
Answer: An atom with 6 protons, 5 electrons, and 7 neutrons
Explanation: In this case, neutrons do not matter as they have a charge of 0, or no charge. A proton has a charge of +1 and an electron has a charge of -1. Since there are 6 protons, the total charge of the protons would be +6. Since there are 5 electrons the total charge of the electrons would be -5. +6 - 5 would result in a charge of +1. This means that this atom would have an overall charge of + 1. Basically, if there is one more proton than electron, then the overall charge of the atom will be +1 but if there is one more electron than proton, then the overall charge of the atom will be -1.
What are two sources of phosphorous?
A. Cows
B. Erosion
C. stratosphere
D. Fossil fuels
E. Fertilizer
Answer: A. Cows
E. Fertilizer
Explanation:
Identify the reaction type shown and describe the clues that were used to identify it.
NH4NO3 → N2O + 2H2O
Answer:
This chemical equation represents a decomposition reaction. This identification is based on the fact that the single reactant chemical compound breaks down into two different chemical substances that are different from the initial chemical substance.
Explanation:
it was the sample response lol
A reactant is broken down into two or more products in the decomposition reaction. The given reaction is a decomposition reaction.
Decomposition reaction:
In this type of chemical reaction, a reactant is broken down into two or more products.
For example- Ammonium nitrate is broken down into nitrous oxide and water molecules.
[tex]\bold {NH_4NO_3 \rightarrow N_2O + 2H_2O}[/tex]
Therefore, the given reaction is a decomposition reaction.
To know more about Decomposition reaction:
https://brainly.com/question/24936069
PLEASE HURRY !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! WILL GIVE BRAINLIEST
What type of rock is limestone? Describe how a limestone rock is likely to change over a long period of time.
Answer:
Over time, the limestone is broken down into its chemical parts and may come back to the surface as volcanic CO2 (in the atmosphere). From the atmosphere, the CO2 might again become part of the biosphere by molluscs or corals absorbing the CO2 to help make their shells
Explanation:
Over a long period of time, we would take a look at the rock "limestone" through the rock cycle. Limestone being a sedimentary rock would be converted to marble, a metamorphic rock if subjected to metamorphic conditions over an extensive period of time.
Forms of energy include ?
Answer:
The different types of energy include thermal energy, radiant energy, chemical energy, nuclear energy, electrical energy, motion energy, sound energy, elastic energy, and gravitational energy.
Explanation:
Aluminum is used to build aero planes. Which two of its physical properties make it suitable for this use
Answer:
Titanium is another metal that's commonly used in aerospace engineering. It's strong, lightweight, Aluminum isn't the strongest metal, but it maintains a perfect balance of strength and low weight that make airplanes fly
Explanation:
vote mee as the brainliest
Answer:
it weight were so thin
explanation
With a weight roughly a third lighter than steel, it allows an aircraft to either carry more weight, or become more fuel efficient. High Strength — Aluminum's strength allows it to replace heavier metals without the loss of strength associated with other metals, while benefitting from its lighter weight
You eat a snack that has 190 Calories, how many kilojoules did you consume? PLEAS HELP ME I need the work too pls
Answer:
794.96 kilojoules
Explanation:
multiply 190 by 4.184
There are 0.798 kilojoules an individual must consume when he/she takes a snack that has 190 Calories.
What is one Calorie?
One calorie may be defined as a unit for measuring heat wjhich is equivalent to the amount of heat required to increase the temperature of one gram of water one degree Celsius.
According to the question,
The amount of calories a snack contains = 190 calories
Now, you should be required to convert calories into Joules.
1 calorie ≅ 4.2 Joules.
190 calories = 190 × 4.2 = 798 Joules.
Now, according to the conversion factor, 1 kilojoule = 1000 joules
∴ 798 Joules = 798/1000 = 0.798 kilojoules.
Therefore, there are 0.798 kilojoules an individual must consume when he/she takes a snack that has 190 Calories.
To learn more about Calories and Joules, refer to the link:
https://brainly.com/question/22066066?source=archive
#SPJ2
Uhm how to do this? I need answers to this please
Answer:
Hi - First you need to determine whether there is a metal or no and from there there are certain rules in order to name the compound. Here is a flowchart to try and help.
Mixtures can be separated by physical processes.
A sequence of physical processes can be used to separate common salt (sodium chloride)
from a mixture containing sand and common salt only.
Give the order and the correct scientific term for the physical processes used to separate the
common salt from the mixture.
don't know sorry.........
Although chemical digestion occurs throughout the digestive system, it mostly occurs in the A esophagus and stomach
B
liver and gall bladder
C
liver and pancreas
D
stomach and intestines
help lols plsssksksksksskd
Answer:
I'd say "a" because not everything with plants and animals is perfectly organized together nothing ever is.
You need to make an aqueous solution of 0.150 M sodium fluoride for an experiment in lab, using a 500 mL volumetric flask. How much solid sodium fluoride should you add?
Answer:
Explanation:
Solution required is .15 M 500 mL sodium fluoride .
molecular weight of sodium fluoride = 42
one mole of sodium fluoride = 42 grams
No of moles contained in the solution of .15M , 500 mL solution
= .15 x 0.5 moles = .075 moles
1 mole = 42 g
.075 moles = .075 x 42 = 3.15 grams .
So mass of sodium fluoride required = 3.15 g .
An atom is found in group 17 and contains 10 neutrons. How many valence
electrons does it have? *