Answer:
C.
Explanation:
The main reason for this decrease is an increase in the number of vaccinations of young children. The smallpox vaccine which was created in 1796 completely allows individuals to easily and quickly fight off the smallpox disease if they were to get it. By being able to fight the disease quickly and effectively it provides less time for the disease to affect another individual. Therefore, causing cases to decrease and become very rare as time goes on.
Which of the following statements is true about neutrons?
a)They have a neutral charge and are found in an atom's nuclues
b)They have a negative charge and are found in an atom's nucleus
c)They have a positive charge and are found in the orbitals of an atom
d)They have a neutral charge and are found in the orbitals of an atom
Answer:
A
Explanation:
Protons are positive
Neutrons are neutral
Electrons are negative
Protons and Neutrons are in the nucleus
Electrons are orbiting around the nucleus
The statement that is true about about neutrons is that They have a neutral charge and are found in an atom's nucleus.
What are neutrons?Neutrons are electrical charge that is form in the atoms of elements which is neutral that is it's is neither positive or negatively charged.
Neutrons have no charge , they are neutral.
Therefore, The statement that is true about neutrons is that They have a neutral charge and are found in an atom's nucleus.
Learn more about neutrons below.
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Are atoms the smallest particles we know about, or are there smaller ones?
Answer:
subatomic particles are smaller then atoms
Pls Help asap no rocky
what is the differences of sitsiritsit and atin cu pung singsing
Answer:
'Sitsiritsit' is a popular folk song of Filipino.
'Atin cu pung singsing' is a popular folk song of Kapampangan.
Explanation:
'Sitsiritsit' is a popular folk song of Filipino.
The song presents a picture of the rustic life that the people used to live. It focuses on the life of the people during the Spanish colonization.
In the song, a woman yells and threatens at a store owner. She asks him to increase the limit of the credit amount or the ants will get him.
'Atin cu pung singsing' is a popular folk song of Kapampangan.
The song presents the feelings of a girl who is looking for her lost ring. She feels very gloomy about this. She brings a proposal that whoever would bring her the ring would be her love forever.
(1) In an experiment for determining the density of water, the following results
were recorded.
-mass of an empty beaker = 65gm.
- mass of the beaker and water = 165gm.
the volume of water = 100Cm.
(Calculate the density of water)
Given parameters:
mass of an empty beaker = 65gm
mass of the beaker and water = 165gm
volume of water = 100cm³
Unknown:
Density of water = ?
Solution:
Density is the mass per unit volume of a substance;
Density = [tex]\frac{mass}{volume}[/tex]
To find the mass of the water ;
Mass of water = Mass of beaker and water - mass of an empty beaker
= 165g - 65g
= 100g
So input parameters and solve;
Density = [tex]\frac{100g}{100cm^{3} }[/tex]
Density of the water in the beaker = 1g/cm³
A property is an aspect of matter that can be observed or measured without changing its chemical composition. Examples of properties include molecular weight, and A property may only be observed by changing the chemical identity of a substance. In other words, the only way to observe a property is by performing a chemical reaction. This property measures the potential for undergoing a chemical change. Examples of chemical properties include and oxidation states
Answer:
A physical property is an aspect of matter that can be observed or measured without changing its chemical composition. Examples of physical properties include molecular weight.
A chemical property may only be observed by changing the chemical identity of a substance. In other words, the only way to observe a chemical property is by performing a chemical reaction
Explanation:
Properties of matter
The properties of matter are classified into; (I) Physical and, (ii) Chemical properties.
Physical properties: A physical property is an aspect of matter that can be observed or measured without changing its chemical composition. Examples of physical properties include molecular weight, density, color, melting and boiling point, etc.
Chemical properties: A chemical property may only be observed by changing the chemical identity of a substance. In other words, the only way to observe a chemical property is by performing a chemical reaction. This property measures the potential for undergoing a chemical change. Examples of chemical properties include and oxidation states, acidic or basic properties, flammability, heat of combustion, etc.
Explain how errors in measurements can affect the safety of products?
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.
How many molecules are in 2,10 mol CO2?
0 3.79 X 1024 molecules
O 2.53 x 1024 molecules
O 1.26 X 1024 molecules
O 3.49 * 10-24 molecules
Answer:
the answer is the 3rd option
Explanation:
which is 1.26 x 1024 calculating with avogardos law
Answer:
1.26 X 1024 molecules
Explanation:
Which is the electron configuration for zinc?
Answer:
1s22s22p63s23p64s23d10
Explanation:
This is the answer to the electron configuration for zinc.
What is the volume of 3.0 grams of lead?
Answer:
it should be 0.01
Explanation:
PLEASE HELP
An engineer is designing a tire for heavy machinery, which statement
describes the clearest constraint that applies to the solution?
A. It must cost the consumer less than $200 per tire.
B. It must function safely under a heavy load.
C. It must be designed so that it has an appealing appearance.
D. It must be affordable for consumers.
Answer: it’s A
Explanation:
Answer:
It's A
Explanation:
what is the mass of 9.6 x10^23 atoms of iron?
According to the Avogadro's number, the mass of 9.6 x 10²³ atoms of iron is 89.002 g.
What is Avogadro's number?Avogadro's number is defined as a proportionality factor which relates number of constituent particles with the amount of substance which is present in the sample.
It has a SI unit of reciprocal mole whose numeric value is expressed in reciprocal mole which is a dimensionless number and is called as Avogadro's constant.It relates the volume of a substance with it's average volume occupied by one of it's particles .
According to the definitions, Avogadro's number depend on determined value of mass of one atom of those elements.It bridges the gap between macroscopic and microscopic world by relating amount of substance with number of particles.
Number of atoms can be calculated using Avogadro's number as follows: mass/molar mass×Avogadro's number
Therefore,mass=9.6×10²³×55.84/6.023×10²³=89.002 g
Learn more about Avogadro's number,here:
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help please
1. Covalent Bonds are formed when atoms
A. Give Electrons
B. Share Electrons
C. Take Electrons
Answer:
b. share electrons
Explanation:
Calculate the oxidation number of sulphur in H2SO4
Answer:
42
Explanation:
my brother said
In a water molecule, oxygen attracts electrons more strongly
than the hydrogens do because an oxygen atom contains
more
in its nucleus.
Enter the answer
PLZ ANSWER WILL GIVE BRAINLIEST
Given the data shown, what two substances react with vinegar? Hint: (+) = a reaction occurred, (-) = no reaction
Gelatin and baking powder
Gelatin and baking soda
Salt and corn starch
Baking powder and baking soda
Answer:
baking powder and baking soda
Explanation:
I know this from prior knowledge, also the graph shows the two with plus signs on vinegar, which means they both react to it. :)
Baking powder and baking soda
On the table they both have a "+" meaning a reaciton has occured.
Hope this helps, brainliest pls! :)
In my closet, I have 5 black shirts, 6 brown shirts, 3 light blue shirts, 5 white shirts, 2 green
shirts, 4 navy blue shirts. What is the total number of shirts?
Explanation:
i think if you add them all the total is 26
Answer:
25 shirts
Explanation:
5+6=11+3=14+5=19+2=21+4=25 (if u dont understand how I wrote that then) 5+6=11, 3+5=8, 2+4=6
11+8=19, 19+6=25
What element has the noble gas configuration [Ar]4s23d8
Answer:
argon
Explanation:
Answer:
Argon
Explanation:
Metalliods have _______ proporties of metals and non metals.
a
both
b
neither
c
different
Answer:
A both
Explanation:
hope this helped
HURRY ⚠️
How many Chlorine atoms in 2HCI?
Hiw many Hydrogen atoms are in 2HCl?
Answer:
2 in each
Explanation:
Ainsley wanted to know if caffeine impacted the rate a mouse learned a maze. He tested two groups of mice and timed them as they attempted to learn the maze. Lab group A received 5 mL of caffeine with their 20 g of grain. Lab group B received 20 g of grain without caffeine. Which is Ainsley's independent variable?
Answer:
Caffeine
Explanation:
In every study, there must be an independent variable and a dependent variable. The independent variable is being manipulated and its effect on the dependent variable is evaluated.
In this study, the independent variable is the administration of caffeine. Its effect on a rat's ability to learn the maze (dependent variable) is evaluated in the study.
Kendra conducts an experiment. She mixes two chemicals, resulting in a chemical reaction. Based on Kendra's
experiment, what can be concluded about the original matter before mixing?
It did not change in identity but did change properties.
It changed in identity but not properties.
It changed in identity and properties.
It did not change in identity nor properties.
Answer: It changed in identity and properties.
Explanation:
Answer:
C: It changed in identity and properties
Explanation:
Hope this helps! good luck :)
Why might it be important to test one variable at a time when doing an experiment?
Answer:
If you change everything at once, you may not know what caused the end result.
Explanation:
If you have Variable A (Salt), Variable B (Potassium), and the Control of Water, you might mix everything together, so you mix salt, potassium and water together. It is known that Potassium reacts very aggressively in water, but since you mixed everything together, you might think that salt+potassium+water goes boom, while it is actually potassium+water=boom.
What is the source of most of our current knowledge of Mercury's appearance and geology?
Please answer quick !!
(PLEASEE HELPPP) A topographic map of part of Arizona is shown below which of the labeled points on the map has the steepest slope?
A) 1
B) 3
C) 2
D) 4
Answer:
I think A is the answer Hope I'm right
(02.01 LC)
What is true of neutrons?
They have no charge and are located inside the nucleus.
They have no charge and are located outside the nucleus.
They are negatively charged and are located inside the nucleus.
They are negatively charged and are located outside the nucleus.
HELP if all the forces acting on an object are balanced then
Answer:
As per Newton's first laws of motion, everybody continues to be at state of rest or of uniform motion in a straight line unless and until it is compelled by some external unbalanced forces acting on it.
Hence, it is the unbalanced force that changes the state of rest or motion of a body. Balanced force is responsible for keeping the body to be either in static equilibrium or in dynamic equilibrium.
As per the options given in the question, the last one is true for an object under balanced forces.
sorry if this doesn't work
A minerals ______ is how it reflects light or how shiny it is
Answer:
Luster
Explanation:
Luster is how the surface of a mineral reflects light. It is not the same thing as color, so it crucial to distinguish luster from color. For example, a mineral described as “shiny yellow” is being described in terms of luster (“shiny”) and color (“yellow”), which are two different physical properties.
Answer:
A Minerals Luster
EXPLANATION:
The Minerals luster is how shiny a mineral is. Luster means a shine or radiance of something, like a polished crystal it gives a sheen of light because it is shiny versus a dirty, worn-out crystal.
Where dose the energy that powers the water cycle come from?
Answer:
sun is the energy that powers the water cycle from
A student noticed a yellow, solid substance was formed when mixing two clear liquids during a lab. What term describes this yellow, solid substance?
A. physical change
B. exothermic reaction
C. endothermic reaction
D. precipitate
Answer:
D
Explanation:
a precipitate is formed from a solution
