Answer:
Its can affect the safety of products by, for example, if you put raw chicken in the oven and don't cook it for long enough, it can make you sick
Explanation:
The difference between the calculated and precise worth is referred to as an error or defect. For example, if the two machinists use the same device to detect measurement mistakes, it is not necessary that they obtain the same results. However, there will be a little difference between the two measurements, which is referred to as an error.
indicate whether the statement is true or false a change of state is a chemical change because ice and water do not resemble one another
Answer:
False. Chemical changes are always physical changes
Answer:
False
Explanation:
how much protons, neutrons, and electrons does iodine-132 1- ion have
The number of protons, neutrons, and electrons is iodine-132, Iodine has 53 protons and 53 electrons as it has no charge the number of protons equals the number of electrons. Iodine-131 has 131 protons as well as neutrons.
What are protons?Protons are subatomic particles that have a positive charge. The strong nuclear force holds protons together in the nucleus of an atom. Neutrons are non-charged subatomic particles (they are neutral).
A proton is a subatomic particle found in every atom's nucleus. The particle has a positive electrical charge that is equal to and opposite to the electron's.
Iodine-132 is the number of protons, neutrons, and electrons. Iodine has 53 protons and 53 electrons because it has no charge, so the number of protons equals the number of electrons. Iodine-131 contains 131 protons and neutrons.
Thus, there will be 131 protons as well as neutrons in iodine-131.
For more details regarding protons, visit:
https://brainly.com/question/12535409
#SPJ2
A neutral atom of nitrogen has electrons in energy level(s):
Select one:
O a. 1 only
O b. 2 only
O c. 1 and 2
O d. 1, 2, and 3
Answer:
c
Explanation:
Nitrogen is in period 2, and has electrons in both 1 and 2.
The electron seeks to go up to energy level n = 2 from level 1, which is the initial energy level. Since the second energy level has more energy than the first, the electron must gain energy to travel from n = 1 to n = 2. A neutral atom of nitrogen has electrons in energy levels are 1 and 2.
What is energy level ?Any discrete value from a set of total energy values for a subatomic particle constrained by a force to a finite space or for a system of such particles, such as an atom or a nucleus, is referred to as the energy level, also known as the energy state, in physics.
"Energy levels" refer to the areas around the nucleus where an atom's electrons are positioned. The 3-dimensional region around the nucleus where electrons are most likely to be is represented by an energy level.
Every component of the cycle of wellness depends on energy. Our attitude and physical health both get better as we get more energy. Connecting with people, exercising, and feeling driven to work hard and accomplish personal objectives are all more likely.
Thus, option C is correct.
To learn more about energy level, follow the link;
https://brainly.com/question/17396431
#SPJ2
How do physical changes and chemical changes differ and how are they alike please at least 5 provide examples each for a brainliest!
Answer:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
How are physical and chemical changes similar and different? (compare and contrast) (Physical and chemical changes are similar because matter experiences a change in state, Physical changes are different because matter remains the same substance, just in a different state, whereas chemical changes change the matter
Examples of chemical changes are burning, cooking, rusting, and rotting. Examples of physical changes are boiling, melting, freezing, and shredding. Often, physical changes can be undone, if energy is input. The only way to reverse a chemical change is via another chemical changes.
Explanation:
5. What is the volume of a sample of metal with a mass of 220 grams and a density of 11 grams per
cubic centimeter?
(1 Point)
a:2420 cubic centimeters
b:231 cubic centimeters
c:20 cubic centimeters
d:0.25 cubic centimeters
pls answer fast
Answer:
The answer is option CExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
So we have
[tex]volume = \frac{220}{11} \\ [/tex]
We have the final answer as
20 cm³Hope this helps you
What is the proper nuclear symbol for the the isotope that has 47 protons, 61 neutrons, and 46 electrons?
Why is the nucleus of an atom positively charged?
Answer:
The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.
How does the mass of an electron compare to the mass of a proton and a
neutron?
A. The mass of an electron is much greater than the mass of a
proton or a neutron.
B. The mass of an electron is greater than the mass of a proton but
less than the mass of a neutron.
C. The mass of an electron is much less than the mass of a proton or
a neutron.
D. The mass of an electron is greater than the mass of a neutron but
less than the mass of a proton.
Answer:
C. The mass of an electron is much less than the mass of a proton or
a neutron.
Explanation:
When we compare the mass of an electron to that of proton or neutron, the mass of an electron is much less than the mass of a proton or a neutron.
Electrons are negatively charged particles in an atom
Protons are positively charged particles
Neutrons do not carry any charges.
The relative mass of an electron compared to that of a proton is [tex]\frac{1}{1840}[/tex] This is a very small valueElectrons generally have mass of 9.11 x 10⁻³¹kgProtons weigh 1.67 x 10⁻²⁷kgNeutrons weigh 1.68 x 10⁻²⁷kgWe can see that electrons have very small mass and this is why when calculating the mass of an atom, we use the sum of the number of protons and neutrons.
In a wave, matter is...
Answer:
liquid
Explanation:
the energy of motion is called
Answer:I think it’s mechanical energy
Explanation:
You have decided to bake a cake. You mix all of your ingredients together to make a delicious chocolate cake. Then, you bake your cake at 350 degrees fahrenheit. You have to perform both a physical and a chemical change to bake a cake. What is the chemical change? Include at least 2 pieces of evidence or indicators to explain how you know it was a chemical change.
Answer:
A gas is evolved
The ingredients can not be recovered
Explanation:
A chemical change is one in which a new substance is formed and it is not easily reversible.
One major ingredient used in cake baking is the baking powder or baking soda.
Baking a cake can be viewed as a chemical change. This is because, when the baking powder or soda is added in the presence of yeast, carbon dioxide gas is evolved as tiny bubbles of gas which makes the cake light and fluffy. Heat is equally given off in the process. The baking powder and other cake ingredients can not be recovered, hence, we can conclusively assert that a chemical change has taken place.
21. Which of the following statements is true about ions?
a. Cations form when an atom gains electrons
b. Cations form when an atom loses electrons
C. Anions form when an atom gains protons
d. Anions form when an atom loses protons
I think its B cause...
When an atom loses an electron, it becomes a cation (positive ion). When an atom gains an electron, it becomes an anion. Ions are created when an atom loses or gains an electron. Atoms can never lose or gain protons, as this would change the fundamental identity of the atom.
if I'm wrong...please don't attack me
The cations are formed when an atom loses electrons.
• The positive ions produced by the loss of one or more electrons are known as the cations.
• The most commonly formed cations take place in the case of the elements, which involve the loss of all the valence electrons.
• The resulting cation exhibits the electronic configuration of the noble gas atom.
• The negative ions produced from the gain of one or more electrons are known as the anions.
Thus, the correct answer is option b, that is, the cations form when an atom loses electrons.
To know more about:
https://brainly.com/question/19026624
Which of the following is a homogeneous mixture .example sea water, muddy water, chalk water and oily water
Answer:
sea water
Explanation:
can someone help me with this question its confusing
ASAP
Answer:
temperature
Explanation:
Changes in which two characteristics can indicate a physical change?
Answer:
Physical changes involve states of matter and energy.
Explanation:
No new substance is created during a physical change, although the matter takes a different form. The size, shape, and color of matter may change. Physical changes occur when substances are mixed but don't chemically react.
The characteristics that can be changed in the physical change has been shape or size of the compound.
Change in the element has been classified as chemical and physical change. The chemical change has been given as the change in the chemical composition of the elements.
The physical change has been the change in the state and form of the element, that has been reversible.
The characteristics that can be changed in the physical change has been shape or size of the compound.
For more information about the physical change, refer to the link:
https://brainly.com/question/1984022
!DUE SOON PLEASE HELP!
Classify the chemical equations as being balanced or not balanced.
CaO + 3C → CaC2 + CO
Na + H2O → 2NaOH + H2
4Fe + O2 → 2Fe2O3
2Mg + O2 → 2MgO
Answer:
balanced;
unbalanced;
unbalanced;
balanced;
Explanation:
CaO + 3C → CaC2 + CO //all elements are balanced
Na + H2O → 2NaOH + H2 //Na is not balanced on the left
4Fe + O2 → 2Fe2O3 //O is not balanced on the left
2Mg + O2 → 2MgO //left is equal to right, balanced
In an ionic compound, the size of the ions affects the internuclear distance (the distance between the centers of adjacent ions), which affects lattice energy (a measure of the attractive force holding those ions together). Based on ion sizes, arrange these compounds by their expected lattice energy. Note that many sources define lattice energies as negative values. Please arrange by magnitude and ignore the sign. ∣∣lattice energy∣∣=absolute value of the lattice energy Na2S, K2S Cs2S Li2S
Answer:
Li2S> Na2S> K2S> CsS
Explanation:
The lattice energy of ionic species depends on the relative sizes of ions in the ionic compounds. As the size of ions increases, the lattice energy decreases and vice versa.
When the size of the anions are the same, the lattice energy now depends on the relative sizes of the cations. Therefore, since all the compounds are sulphides and the order of magnitude of ionic sizes is: Li^+ < Na^+ < K^+ < Cs^+.
Therefore, the order of decrease in lattice energy is; Li2S> Na2S> K2S> CsS
Which of the following resources carries a high potential for environmental damage
A:wind
B:trees
C:geothermal
D:nuclear
Answer:
Nuclear
Explanation:
Nuclear is a un-natural and newer type of energy source that can spread lethal toxins into the air causing living things to die. On top of that is it sometimes very unstable and sometimes if it's not disposed correctly it can cause high levels of radiation.
the scientefic methos is founded on
Answer:
Francis Bacon was the first to formalize the concept of a true scientific method, but he didn't do so in a vacuum. The work of Nicolaus Copernicus (1473-1543) and Galileo Galilei (1564-1642) influenced Bacon tremendously.
.
In what way is kinetic energy present in a solar oven
how many grams of potassium nitrate are required to prepare 3.00 x 10^2 mL of 0.750 M solution
Answer:
Mass = 22.725 g
Explanation:
Given data:
Mass of potassium nitrate required = ?
Volume of solution = 3.00 ×10² mL
Molarity of solution = 0.750 M
Solution:
Formula:
Molarity = number of moles of solute / L of solution
Now we will convert the volume into L.
3.00 ×10² mL × 1L /1000 mL
0.003 ×10² L or 0.3 L
now we will put the values in formula.
0.750 M = n / 0.3 L
n = 0.750 M × 0.3 L
M = mol/L
n = 0.225 mol
Mass of potassium nitrate:
Mass = number of moles × molar mass
Mass = 0.225 mol × 101 g/mol
Mass = 22.725 g
Match the words to the correct descriptions.
Have different properties depending on the number of protons.
The ingredients maintain their properties when they are placed together or taken apart.
The atoms take on new properties when they bond together or are separated.
1.
Compounds
2.
Mixtures
3.
Atoms
Answer:
1. Atoms, Have different properties depending on the number of protons.
2. Mixtures, The ingredients maintain their properties when they are placed together or taken apart.
3. Compounds, The atoms take on new properties when they bond together or are separated.
Explanation:
Please answer fast!
Where in an atom are protons located?
A.
in the nucleus
B.
in areas of probability
C.
in orbitals
D.
in the photons
Explanation:
they are located in the neucleus
Answer: they are located in the neucleus
Explanation:
can someone plz help me with this question its hard ASAP
Answer:
d
Explanation:
Which of the following is an example of a compound?
Group of answer choices
H2
O
H2O
Na
Answer:
H2O is a compound because its a main constitute of earths hydrosphere
When Juan got home from school, he noticed a foul smell coming from the kitchen. He decided to investigate the smell and found fruit sitting on the counter. There was evidence that a chemical reaction had occurred. When he looked at the fruit, he saw that it had turned brown and was soft to the touch. Write a short claim evedence and reasoning. If you could separate them it would be geat
Answer:
See explanation
Explanation:
A chemical reaction is said to have occurred when there is a permanent, irreversible change in a substance.
Considering the fruit in the question, the changes in the fruit can not be reversed. Nothing can ever be done to return the fruit to its original form. This ultimately shows that a chemical reaction has taken place.
Secondly, the occurrence of a chemical reaction can be confirmed by evolution of a gas. The foul smell that filled the kitchen is the gas evolved during the chemical reaction involving the rotten fruit.
A tennis ball is moving at a speed of 96.0 miles per hour. Which of the
following is the speed of the ball in meters per second?
Answer:
42.9158 m/s
Explanation:
the answer is there above
Na: 1s22sC2p 3s
C=
D =
E =
Answer:
C = 2
D = 6
E = 1
Explanation:
just took the test :)
The isotope Np-238 has a half life of 2.0 days if 96 grams of it were present on Monday how much will remain six days later
Answer:
12 grams
Explanation:
For any radioactive substance
the amount of substance left after n half life is given by = [tex]x/2^n[/tex]
where x the original amount of substance.
____________________________________________
Half life of isotope Np-238 = 2 days
total no of days = 6
no of half life =total no of days/Half life of isotope Np-238 = 6/2 = 3
thus,
for our problem n = 3
initial amount of Np-238 = 96 grams
thus,
the amount of substance left after 3 half life = 96/2^3 = 96/8 = 12 grams.
Thus, 12 grams will be left after six days.
***BRAINLIEST ASNWERRR***
How many grams are in 34.2 moles of Lithium (Li)?
Mass of Li = 237.38 g
Further explanationThe mole itself is the number of particles contained in a substance amounting to 6.02.10²³
[tex]\large {\boxed {\boxed {\bold {mol = \frac {mass} {molar \: mass}}}}[/tex]
KnownMoles of Li = 34.2
Molar mass(MW) of Li = 6.941 g/mol
then mass of Lithium (Li) :
[tex]\tt mol=\dfrac{mass}{MW}\\\\mass=mol\times MW\\\\mass=34.2\times 6,941~g/mol\\\\mass=\boxed{\bold{237.38~g}}[/tex]
