Answer:
The study population is the subset of the target population available for study (e.g. schizophrenics in the researcher's town). The study sample is the sample chosen from the study population.
Explanation:
In research terminology the Population can be explain as a comprehensive group of individuals, institutions, objects and so forth with have a common characteristics that are the interest of a researcher. Any value which is identified or measured from the characteristics of entire population can be called as Parameter.
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Answer:B
Explanation:
Heat boils it will get hot no heat/cold will freeze
An atomic model shows 19 protons, 20 neutrons, and 19 electrons. What is the mass number of the atom?
A. 39
B. 20
C. 58
D. 19
Answer:
A. 39
Explanation:
Mass number= #protons + #neutrons
19+20= 39
Taking into account the definition of mass number, the correct option is the option A: the atomic mass of the atom is 39.
First of all, all atoms are made up of subatomic particles: protons and neutrons, which are part of their nucleus, and electrons, which revolve around them. Protons are positively charged, neutrons are neutrally charged, and electrons are negatively charged (electrons).
On the other hand, the mass number tells us the total number of particles in the nucleus. That is, the mass number is the sum of the number of protons and the number of neutrons in the atomic nucleus:
Mass number = (number of protons) + (number of neutrons)
It is represented by the letter A.
In this case:
number of protons= 19number of neutrons= 20So:
Mass number = 19 + 20
Solving:
Mass number= 39
In summary, the correct option is the option A: the atomic mass of the atom is 39.
Learn more:
https://brainly.com/question/11837355?referrer=searchResultshttps://brainly.com/question/1758023It is made up of two or more compounds is it mixture
or compound?
Answer:
mixture
Explanation:
A baby weighs 3.91 kg and measures 51.4 cm. Convert the baby's weight
to pounds and its length to inches
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Answer:
1.0 g/cm3
Explanation:
yeah that's the density of water
Answer:
a 1 g/cm3
Explanation:
per google- A common unit of measurement for water's density is agram per milliliter (1 g/ml) or 1 gram per cubic centimeter (1 g/cm3)
what does science explain? (4 points)
A) moral values
B) biased opinion
C) meaning of life
D) natural phenomena
Answer:
D
Explanation:
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5
Calculate the mass of a liquid with a density of 2.5 g/mL and a volume of 15 mL.
7
Calcule la masa de un líquido con una densidad de 2.5 g/mL y un volumen de 15 mL.
A. 375 g
B. 3.75 g
C. 37.5 g
Answer:
The answer is option CExplanation:
The mass of a substance when given the density and volume can be found by using the formula
mass = Density × volumeFrom the question
volume of liquid = 15 mL
density = 2.5 g/mL
We have
mass = 15 × 2.5
We have the final answer as
37.5 gHope this helps you
why can liquids not be compressed easily
Answer :The reason why compression is more difficult is a direct illustration of quantum mechanics.
how many carbon atoms are in C6H14N4O2
a.4
b.2
c.6
d.14
Answer:
6
Explanation:
Answer:
6
Explanation:
C6
Carbon 6
Add a neutron to create carbon-13. Is this isotope stable or radioactive?
Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes the
reaction?
O The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the
products.
O The law of conservation of energy indicates the same amount of carbon will be found in the reactants as in the
products,
The law of conservation of mass indicates the same amount of glucose will be found in the reactants as in the
products.
The law of conservation of energy indicates the same amount of glucose will be found in the reactants as in the
products.
Answer:
A
Explanation:
Question:
Plants use sunlight as energy to convert carbon dioxide and water into glucose and oxygen. Which best describes the reaction?
Options:
The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products. The law of conservation of energy indicates the same amount of carbon will be found in the reactants as in the products. The law of conservation of mass indicates the same amount of glucose will be found in the reactants as in the products. The law of conservation of energy indicates the same amount of glucose will be found in the reactants as in the products.Answer:
A.) The law of conservation of mass indicates the same amount of carbon will be found in the reactants as in the products.
Explanation:
I just did the test on edge 2020 and got it right!
Use this formula: Q=(m)(∆T)(Csp), where Q is heat (what you’re solving for), m is mass in grams (g), ∆T is the change in temperature (ending temp. minus beginning temp.) in degrees Celsius (∘C), and Csp is the specific heat capacity in joules per gram per degree(J/g ∘C). The answer will be in joules of energy (J).
Just multiply all three quantities given in the text together (as it shows in the formula!) to get Q. But remember, you have to figure out the change in temperature (like 10 ∘C to 50 ∘C is a change of 40 ∘C).
1. A calorimeter holds 75 g water at 26°C. A sample of hot copper is added to the water. The final temperature of the water and copper is 39°C. What is the change in enthalpy associated with the change in the water’s temperature? The specific heat capacity of water is 4.19 J/g°C.
2. A chemist heats a 215-g sample of iron from 25.0°C to 90.0°C. How much heat did the iron absorb? The specific heat capacity of iron is 0.45 J/g°C.
1. Q = 4085.25 J
2. Q = 6288.75 J
Further explanationHeat can be calculated using the formula:
Q = mc∆T
A calorimeter is a device used to measure the specific heat of material
1. mass of water : m= 75 g
T1 = 26°C
T2 = 39°C
Csp = 4.19 J/g°C.
[tex]\tt Q=m.c.\Delta T\\\\Q=75\times 4.19\times (39-26)\\\\Q=4085.25~J[/tex]
2.mass of iron = 215 g
T1 = 25°C
T2 = 90°C
Csp = 0.45 J/g°C.
[tex]\tt Q=m.c.\Delta T\\\\Q=215\times 0.45\times (90-25)\\\\Q=6288.75~J[/tex]
The variable placed on the horizontal or x-axis of a graph is what variable
Answer:
Independent variable
Explanation:
What causes a static charge
Answer:
Separating or rubbing materials.
Explanation:
Static electricity occurs when positive (+) or negative (−) electrical charges collect on an object's surface. There are several ways this condition can be caused.
Sara slides down a playground slide. How will friction affect her as she slides?
Answer:
Friction is a force that occurs whenever two objects rub against each other, such as a slide and a person's backside. Without friction, a slide would accelerate the rider too quickly, resulting in possible injury. Certain materials called lubricants can reduce the effects of friction. This is why water park slides are much faster than playground slides; the water acts as a lubricant. Sitting on wax paper can also reduce the amount of friction.
Explanation:
Earth is approximately 149,600,000 kilometers away from the sun. How would this distance be expressed in scientific notation?
Answer:
bo
Explanation:
I dont know nothing cuz am that smart and yes am cool wait I have to wait 67 seconds am not done answering you questions I will be back in a few....
48 points
Chemistry is the study of 1.
& its interactions. Matter has
2.___, takes up 3. ____& is made up of 4.____
from the
periodic table. Each element in the periodic table has a different
5. ____structure. You can use the information in the periodic square of
each element to model its basic atomic structure. The three subatomic
particles that make up atoms are the 6. ___charged protons & the
7. ____neutrons are both located in the nucleus, & the 8.____
charged electrons are found orbiting the nucleus. The element's
9. ____number is equal to the number of protons, & identifies the
element. The element's atomic mass is equal to the number of protons
plus neutrons in the 10.____
The atomic charge on atoms in the
periodic table is 11. ____; so the number of electrons in a neutral atom
is also equal to the 12. ____number. Charged atoms are called
13. ____If an atom looses an electron from its neutral state it becomes a
positively charged 14. ____If an atom gains an electron it becomes a
negatively charged 15. ____Atoms with a different number of
neutrons are called 16.___
and they also differ in mass. *
Answer:
1. Matter
2. Mass
3. Space/Volume
4. Substances
5. Atomic
6. Positively
7. Neutrally charged
8. Negatively
9. Atomic
10. Nucleus
11.
12. Atomic
13. Ions
14. Cation
15. Anion
16. Isotopes
Answer:
Give that person Brainly now :)
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:
The model of a neutral element is shown below. Which particle determines the reactivity of the element?
A
B
C
D
Fog is composed of water droplets in air. Which term describes fog? A. solution B. colloid C. suspention D. solvent
Answer:
colloid
Explanation:
Colloid is a type of fog
Answer:
colloid
Explanation:
I got it right on egd
Convert the following number into scientific notation: 88,000,000.
A 8.8 x 10⁶
B. 88 x 10⁴
C 8.8 x10⁷
D. 8.8 x 10-⁷
Which is another name for groups of elements?
Answer:
another name for groups of elements is family.
Answer: The Periodic Table of Elements
Explanation: The Periodic Table of Elements is a table with different elements arranged in an order, usually in vertical rows of two.
is the amount of
matter in an object.
Group of answer
choices
Weight
Volume
Density
Dough
10. How many protons, neutrons, and electrons are present in the
140 +3
Ce ion?
Name: Cerium
Symbol: Ce
Atomic Number: 58
Atomic Mass: 140.116 amu
Number of Protons/Electrons: 58
Number of Neutrons: 82
Photosynthesis occurs in
the mitochondria
chloroplast
A compound such as CaCl, would have an overall charge of?
Calcium Chloride would have a charge of +2
Hopes this helps :)
Group/Family
Noble gases
Metals
Nonmetals
Halogens
Metalloids
Period
1.
A
2.
B
3.
C
4.
D
5.
E
6.
F
7.
G
Answer:
1. Metals
2. Metaloids
3. Non-Metals
4. Alkali Metals
5. Transition Metals
6. Halogens
7. Noble Gases
1. Any atom that is electrically neutral must contain -
Answer:
The same number of electrons and protons.
Explanation:
Because a proton has a charge of +1 and an electron has a charge of -1, the ratio of protons to electrons must be 1:1 for the atom to be neutral.
8. Calculate the mass of 3.47x 1023 gold atoms.
Answer:
the answer is 1.227
Why would heating up the human body be a bad choice for causing a chemical reaction?
Answer:
Explained below
Explanation:
The human body has a normal core temperature of around 37°C to 38°C.
Now, if it is heated up to say 39° to 40°C, fatigue will start to set in and the brain begins to tell the muscles to slow down.
If it's now heated to higher temperatures above above 41°C, the body will begin to experience heat exhaustion and therefore will start to shut down.
Due to this process, the body can't even sweat at that stage because blood flow to the skin will stops thereby making the body feel cold and clammy. Thus, chemical processes/reaction in the body will begin to be affected and the cells inside the body will start to deteriorate and thus there is now a huge risk of having multiple organ failure.