An atom of an element always contains
Answer:
An atom of an element always contain three fundamental particles called electrons(e-) , neutron ( n zero) and protons ( p+)
An atom of an element always contains a proton, electron and neutron.
What is an atom ?Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus. Only the most common type of hydrogen is neutron-free. Every solid, liquid, gas, and plasma is made up of atoms that are either neutral or ionized.
But when it comes to the word atom, we must go back to 400 B.C. Greece. And Democritus, a brilliant philosopher, proposed the Greek word atomos, which means uncuttable.
Every atom is made up of a nucleus and one or more electrons that are attached to the nucleus. One or more protons and a number of neutrons make up the nucleus.
Thus, An atom of an element always contains a proton, electron and neutron.
To learn more about an atom, follow the link;
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Please help with this question
THE ANSWER IS c:0%
HOPE IT MAY HELPS YOUhow have vaccines impacted people's understanding of the world?
Answer:
It has shone a light on our (I live in the u.s.) raciest past and now more then ever people are listening to science, even more so depending on it!
The correct name for P2O5 is
a
b
phosphorus(ll) oxide
phosphorus(five) oxide
diphosphorus oxide
diphosphorus pentoxide
С
d
ANSWER
p2O5 is diphosphorus pentoxide.
Silver nitrate reacts with calcium chloride as
shown.
2 AgNO3 + CaCl2 → 2 AgCl + Ca(NO3)2
How many grams of CaCl2 would be required to completely react with 420 mL of
0.506 M AgNO3 solution?
Answer in units of grams.
Answer: 11.8 grams of [tex]CaCl_2[/tex] is required.
Explanation:
To calculate the number of moles for given molarity, we use the equation:
[tex]\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in L)}}[/tex] .....(1)
Molarity of [tex]AgNO_3[/tex] solution = 0.506 M
Volume of solution = 420 mL
Putting values in equation 1, we get:
[tex]0.506M=\frac{\text{Moles of} AgNO_3\times 1000}{420ml}\\\\\text{Moles of }AgNO_3=\frac{0.506mol/L\times 420}{1000}=0.212mol[/tex]
The balanced chemical reaction is:
[tex]2AgNO_3+CaCl_2\rightarrow 2AgCl+Ca(NO_3)_2[/tex]
2 mole of [tex]AgNO_3[/tex] requires = 1 mole of [tex]CaCl_2[/tex]
0.212 moles of [tex]AgNO_3[/tex] require = [tex]\frac{1}{2}\times 0.212=0.106[/tex] moles of [tex]CaCl_2[/tex]
Mass of [tex]CaCl_2[/tex] =[tex]moles\times {\text {Molar Mass}}=0.106mol\times 111g/mol=11.8g[/tex]
if carbon dioxide is broken down. what element will it give?
True or false: Heterotrophs need to go find and eat food.?
:FALSE
:TRUE
Answer:
Explanation:
Heterotrophs cannot make their own food, so they must eat or absorb it. For this reason, heterotrophs are also known as consumers. Consumers include all animals and fungi and many protists and bacteria. They may consume autotrophs or other heterotrophs or organic molecules from other organisms
Which system is responsible for the production of red blood cells?
hormone erythropoietin (EPO) is responsible for the production of red blood cells.
need help to solve it
Answer:
Divide by the molar mass to get moles
Explanation:
Can anybody do this?
Answer:
0.17907
Explanation:
HELPPP ASAPPP
Use the element tile below to calculate the molar mass of He2 (helium gas).
2 g/mol
16.012 g/mol
8.006 g/mol
4.003 g/mol
Answer: 4.003 g/mol
Explanation:
So basically Molar mass is the atomic mass of an element and the atomic mass of Helium is 4.0026 or 4.003 g/mol
9. Good insulator should be
(a) Fire proof
(b) Chemically inert
(c) Odourless in use
(d) All of the above
Ar
Answer:
A fire proof
Explanation:
I hope this is help
Why is chemistry important? i need 2 paragraph please
What temperature does neon condensate?
Answer and Explanation:
I believe −246.048 C or −411 F
True or false The difference between solids and liquids is that solids have definite shape and volume, while liquids have no define volume
Answer:
False
Explanation:
Answer:
true! :) hope it helps
a 2.7 L of N2 is collected at 121kpa and 288 K . if the pressure increases to 202 kpa and the temperature rises to 303 K , what volume will the gas occupy?
Answer:
The gas will occupy a volume of 1.702 liters.
Explanation:
Let suppose that the gas behaves ideally. The equation of state for ideal gas is:
[tex]P\cdot V = n\cdot R_{u}\cdot T[/tex] (1)
Where:
[tex]P[/tex] - Pressure, measured in kilopascals.
[tex]V[/tex] - Volume, measured in liters.
[tex]n[/tex] - Molar quantity, measured in moles.
[tex]T[/tex] - Temperature, measured in Kelvin.
[tex]R_{u}[/tex] - Ideal gas constant, measured in kilopascal-liters per mole-Kelvin.
We can simplify the equation by constructing the following relationship:
[tex]\frac{P_{1}\cdot V_{1}}{T_{1}} = \frac{P_{2}\cdot V_{2}}{T_{2}}[/tex] (2)
Where:
[tex]P_{1}[/tex], [tex]P_{2}[/tex] - Initial and final pressure, measured in kilopascals.
[tex]V_{1}[/tex], [tex]V_{2}[/tex] - Initial and final volume, measured in liters.
[tex]T_{1}[/tex], [tex]T_{2}[/tex] - Initial and final temperature, measured in Kelvin.
If we know that [tex]P_{1} = 121\,kPa[/tex], [tex]P_{2} = 202\,kPa[/tex], [tex]V_{1} = 2.7\,L[/tex], [tex]T_{1} = 288\,K[/tex] and [tex]T_{2} = 303\,K[/tex], the final volume of the gas is:
[tex]V_{2} = \left(\frac{T_{2}}{T_{1}} \right)\cdot \left(\frac{P_{1}}{P_{2}} \right)\cdot V_{1}[/tex]
[tex]V_{2} = 1.702\,L[/tex]
The gas will occupy a volume of 1.702 liters.
Which system controls organs in times of stress?
Answer:
The autonomic nervous system has a direct role in physical response to stress and is divided into the sympathetic nervous system (SNS), and the parasympathetic nervous system (PNS). When the body is stressed, the SNS contributes to what is known as the “fight or flight” response.
Explanation:
Which of the greenhouse gases are carbon compounds?
Answer:
Methane (CH4),Carbondioxide green house gases are carbon compounds
Carbon dioxide (CO2) and methane (CH4) are two powerful greenhouse gases produced by the carbon cycle.
A rectangular poster is /4 yard wide and / yard tall. What is its area? Solve this problem any way you choose
Answer:
Area of rectangular poster = [tex]\frac{3}{16}[/tex] yard²
Explanation:
P.S - The exact question is -
Given - A rectangular poster is [tex]\frac{1}{4}[/tex] yard wide and [tex]\frac{3}{4}[/tex] yard tall.
To find - What is its area ?
Proof -
We know that ,
The area of rectangle = Length × Breadth
Here,
Given that,
Length of rectangle = [tex]\frac{3}{4}[/tex] yard
Breadth of rectangle = [tex]\frac{1}{4}[/tex] yard
∴ we get
Area of rectangular poster = [tex]\frac{3}{4}[/tex] × [tex]\frac{1}{4}[/tex] yard²
= [tex]\frac{3}{16}[/tex] yard²
⇒Area of rectangular poster = [tex]\frac{3}{16}[/tex] yard²
HELP!!
need correct answer..
Directions: Write True if the statement is correct and False if the
statement is incorrect.
21. An ecosystem is where both biotic factor such as
plants, animals and other organisms and abiotic factor like weather
(temperature and humidity) and landscape (rocks, soil, etc.) work
together.
22. Intertidal zone are areas where salt water and fresh
water meets (brackish water).
23. Water in estuaries is less salty.
24. Organisms does not require energy to perform life
activities.
25. Intertidal zones are area where the presence of water
depends on the tides.
26. Producer are organisms that produce food from
sunlight and inorganic substances.
27. Food chain is a series of transfer of energy as the
algae can be eaten by small fish and small fish may be eaten by a
carnivorous fish.
28. Decomposers are organisms that eat food scraps and
left-overs.
29. Consumers are organisms that eat other organisms.
30. A food web is composed of different food chains.
Answer my question pls!!
spam/unhelpful/incorrect/not sure = REPORT!!
Answer:
21: True
22: False
23: True
24: False
25: False
26: True
27: True
28: False
30: True
Explanation: Hope this is helpful :)
1. inside of a cell helps it to maintain its size and shape. 2. When turgor pressure inside of a plant’s cells decreases, the plant begins to 3. Plants grow upward against the downward force of gravity in a process known as 4. Even when plants are placed on their sides, they recognize the force of gravity, and their stems grow and their roots grow ** answers please its on stem scopes on Concept attainment quiz 7.7B Organism Force and Motion**
K(s)+H2SO4(aq)
——>_____+______
K2SO4 + H2
Reason :Potassium is highly reactive
Answer:
K2SO4 + H2 this is the reaction.
Elements are organized on the table according to their _____________ ___________ , usually found near the top of the square.
Answer:
atomic number
Explanation:
Elements are organized on the table according to their atomic number, usually found near the top of the square.
Answer:
by their atomic number
hope this helped
5. Now you want to know the distance in AU to each place where
you will be traveling. That way, you can relate each distance to our
solar system. What conversion factor will you need to multiply by to
convert kilometers to AU? (Hint: 1 AU = 149,598,000 km)
Answer:
Multiply the length value by 6.68456e-9
Explanation:
The question involves converting from one unit (kilometers) to another unit (Au)
From the question;
149,598,000 km = 1 AU
1 km = x
Cross multiplying;
1 * 1 = x * 149,598,000
1 = 149,598,000x
x = 1 / 149,598,000
x = 6.68456e-9
To convert kilometer to Au; Multiply the length value by 6.68456e-9
The genetic information found in DNA, chromosomes, and determines
A. the traits of the organism
B. the organism as an animal
C. the safety of the nucleus
D. the type of cell
Answer:
a
Explanation:
the traits of the organism
How much sugar can be dissolved of the 0.3 ml of water is heated to 1000C?
How can i solve this formula
Answer:
K2 Cr2 O7 is the empirical formula
Explanation:
Assume we have 100 g of the compound, because it makes the number of grams equal to the percentage.
Then convert grams of each element into moles
Then divide the moles of each element by the smallest number of moles attained to get the whole number mole ratios of the empirical formula
However, if you don't get whole numbers when you divide by the smallest number of moles, then multiply all moles by one common factor that makes them all whole numbers.
HELP! WILL MARK BRAINLYEST!!
The following formula d/t is used for calculation what?
The formula is used for calculating speed. D stands for distance, T stands for time. Full formula is S=D/T
The gametes are identical to each other and combine to make an identical organism.
True
False
Answer:
true
Explanation:
Where are the volcano located
Answer:
In the ring of fire
Hope this acc helps