Answer:
Bcinder
Explanation:
Unit Test
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Which statement best describes the direction of heat flow by conduction between two samples of the same material?
Heat flows from faster molecules to slower molecules when they are near.
Heat flows from faster molecules to slower molecules when they collide.
Heat flows from slower molecules to faster molecules when they are near.
Heat flows from slower molecules to faster molecules when they collide.
Answer:
b
Explanation:
edge 2021
According to the concept of conduction,heat flows from faster molecules to slower molecules when they collide.
Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules .
There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
Heat is transferred from faster to slower molecules when they collide , thus the correct option is that heat flows from faster molecules to slower molecules when they collide.
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How many neutrons are in one atom of the elemen, F-19?
Answer:
10
Explanation:
Answer: 10 neutrons
This isotope of fluorine has 9 protons, 9 electrons and 10 neutrons.
Explanation:
PLS HELP ! 5.00 mL of a stock solution, containing 0.200 M of Na3PO4 was pipetted into a 25.00 mL volumetric flask and made up to the calibration mark with deionised water. A serial dilution was carried out for another two times to obtain the final solution of desired concentration. Calculate the concentration of the final solution, express in ppm (by volume).
Answer:
262 ppm of Na₃PO₄
Explanation:
In a dilution, the concentration of the initial solution is decreased. When you take 5.00mL of the solution that is diluted to 25.0mL The solution is diluted 25/5 = 5 times
If you make another two serial dilutions the final solution wil decrease its concentration 5*5*5 = 125 times
As original solution containing 0.200 M of Na3PO4, the final solution will have a concentration of:
0.200M / 125 = 1.6x10⁻³M
Molarity is defined as the ratio between moles and liters. 1.6x10⁻³ moles of Na3PO4 in 1L are:
1.6x10⁻³mol ₓ (164g/mol) = 0.262g Na₃PO₄ / L
Assuming density of Na3PO4 as 1g/mL the concentration of the solution is:
0.262mL Na₃PO₄ / L
As 1mL = 1000μL:
262μL Na₃PO₄ / L
μL of solute per L of solution is equal to ppm, that means the solution has:
262 ppm of Na₃PO₄What is the dependent variable for "how does changing your laundry detergent affect how clean your clothes are?"
Dependent variables receive this name because, in an experiment, their values are studied under the supposition. The dependent variable is the cleanliness of the clothes.
What is the dependent variable ?It is something on which other elements depend. A test score, for instance, may be a dependent variable because it could vary based on a number of variables, including how much you studied, how much sleep you got the night before the test, and even how hungry you were.
A dependent variable is one that is altered as a result of the modification of an independent variable. Your independent variable "depends" on the outcome you're interested in measuring. Dependent variables are also referred to as: response elements (they respond to a change in another variable)
There are often two different sorts of variables in analytical health research. We anticipate that independent variables will have an impact on dependent variables.
Thus,The dependent variable is the cleanliness of the clothes.
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Which particle has no charge
Answer:
Neutron
Explanation:
Jaiden is writing a report about the structure of the atom. In her report, she says that the atom has three main parts and two subatomic particles. Do you agree with her? Why or why not?
Answer:
The smallest constituent of an element is termed as an atom. According to Jaiden, an atom comprises two subatomic particles and three prime parts, however, this is incorrect as an atom comprises three subatomic particles and two main parts. The three subatomic particles are the protons, electrons, and neutrons. All these parts are smaller in comparison to an atom, thus, they are considered as subatomic particles.
To be considered as an atom, an atom is needed only electrons and neutrons, like hydrogen exhibit one electron and one proton. On the other hand, the overall charge of the atom is not affected by the presence of neutrons, it is the subatomic particle that only enhances the mass of the atom.
Answer:
I disagree with her because an atom has two main parts: the nucleus and the electron cloud. Atoms have three subatomic particles: protons, neutrons, and electrons.
Explanation:
so ...this is the question and I hope you get it right one
Answer:
About 96 grams per mole
Explanation:
The chemical formula of ammonium carbonate is [tex](NH_4)_2CO_3[/tex]. This means that breakdown of moles of atom per mole of molecule is:
2 moles of nitrogen, with a molar mass of around 14
8 moles of hydrogen, with a molar mass of around 1
1 mole of carbon, with a molar mass of about 12
3 moles of oxygen, with a molar mass of about 16
The molar mass of ammonium carbonate is therefore:
2(14)+8(1)+1(12)+3(16)=28+8+12+48=about 96
Hope this helps!
give chemical tests to distinguish between saturated and unsaturated compound
bromine is used to distinguish between saturated and unsaturated compounds. when bromine water is added to the unsaturated compound, bromine that added to the unsaturated compound and the red brown colour of bromine water is discharged.
whats the chemical formula for dilute hydroxide acid