Answer:
He it would because 250g is the answer is to 256g
Explanation:
How many moles are present in 44.8 L of nitrogen gas (Na)?
Answer:
two moles
There are two moles.
Explanation:
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.
An atom is found in group 17 and contains 10 neutrons. How many valence
electrons does it have? *
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.
What do the letters ESM stand for?
Answer:
European stability mechanism
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%
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
Guys pleasee helpp 20 points
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
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.
A student is building an electrical circuit. Which material should she choose for wires, and why.
Look at the screen shot
D. A metal such as copper, because its atom have very mobile electrons - A-p-e-x verified!
Have a Great Day!
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 .
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:
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
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help lols plsssksksksksskd
Answer:
I'd say "a" because not everything with plants and animals is perfectly organized together nothing ever is.
Water has a molar mass of 18.0 g/mol. How many particles of water do you drink if you drink 64 oz., or 1893 grams, of water in a day?
Answer:
[tex] \frac{1839}{18} = 102.16[/tex]
Take 102.16 and multiply by avogadros #
and you get 6.33 × 10^25 otherwise A
Answer:
Answer is A
Explanation:
I just took this.
Energy stored in an object because of position or condition is called ___________ energy.
Answer:
Potential energy
Help me plzz and thank u
Answer:
the terminator because i did this test
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
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.
"Henry mixed salt and water together in a cup until he observed a clear solution. He measured the mass of the solution. Then he placed the cup outside for several sunny days during the summer. After a week, he observed that only solid salt remained in the cup and the mass had decreased. Henry concluded that a physical and chemical change occurred in this investigation."
Which statements correctly defend or dispute his conclusion?
A.)He is correct. Dissolving salt in water is a physical change, but evaporating the water is a chemical change. Formation of a solid is evidence that a chemical change occurred.
B.)He is correct. Evaporation is a physical change, but dissolving salt in water is a chemical change. The change in mass is evidence that a chemical change occurred.
C.)He is incorrect. Dissolving salt in water and evaporation of the water are both physical changes. The reappearance of salt is evidence that the change was reversible by a physical change, so it could not be a chemical change.
D.)He is incorrect. Dissolving salt in water and evaporation of the water are both chemical changes. The reappearance of salt is evidence that the change was reversible by a chemical change, so it could not be a physical change.
Answer:
C.)He is incorrect. Dissolving salt in water and evaporation of the water are both physical changes. The reappearance of salt is evidence that the change was reversible by a physical change, so it could not be a chemical change.
Explanation:
From the analogy of the problem presented, we can see that Henry is grossly incorrect. His conclusion from the process of the experiment he carried out is completely wrong.
Physical changes are changes that alters the physical properties of matter particularly the form and state.
Chemical changes leads to the formation of a new kind of matter.
We can see that since the salt was obtained back after evaporation, no change has occurred to it.
Therefore, evaporation in itself is a physical change process.
Answer:
c on ed
Explanation:
Earths rocks change from one type to another over time die to various earth processes A- igneous rock B- cementation C- metamorphic rock D- rock cycle
Answer:
The rock cycle describes the processes through which the three main rock types (igneous metamorphic, and sedimentary) transform from one type into another.
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
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:
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.
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.
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.........
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
What group on the periodic table is more reactive 5 or 6 and why?
Answer:
heheeheheh
Explanation:
can someone help answer this? thanks!
if surface tension relies on intermolecular forces, how could you make surface tension decrease?
(think about how and where molecules bind to each other)
Answer:
We could make the surface tension to decrease by removing and causing a disruption to the intermolecular forces(hydrogen bonds).
Explanation:
To explain this answer, we will consider an experiment whereby a paper clip is made to rest at the top surface of water inside a container/beaker.
First of all, the intermolecular forces present in water are also known as hydrogen bonds.
It's relationship with surface tension is that when there is high surface tension in the water, this high tension will allow the paper clip to rest on top of the hydrogen bonds present at the top surface in between the water molecules.
However, the surface tension will decrease when we remove or cause a disruption to the intermolecular forces (hydrogen bonds).