Answer:
The rock cycle describes the processes through which the three main rock types (igneous metamorphic, and sedimentary) transform from one type into another.
Write any four properties of water.
Answer:
it is in liquid state.
it shapes as the object is .
it can change into gas state by heating .
it has on colour.
Which job title describes a person with a career in green energy?
Answer:
Natural resource professional
Explanation:
The job title that describes a person with a career in green energy is a hydroelectric technician. The correct option is c.
What is green energy?Green energy is renewable energy and these energies are produced by renewable resources. Renewable resources are the resources that will not be reduced, and these natural resources are present, and these energies can reproduce again by these resources.
The hydroelectric technician is the person who checks the technical problems of a hydroelectric power plant. Hydroelectricity is produced by water.
This is a renewable resource, and it does not produce any kind of pollution, So a hydroelectric technician will be a job title that describes a person with a career in green energy.
Therefore, the correct option is c., hydroelectric technician.
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The question is incomplete. Your most probably complete question is given below:
Elevator installer
sewing machine operator
hydroelectric technician
animal trainer
show how to work it out.
.How many sodium atoms are there in 26.3 grams of sodium oxide (Na2O)? Answer: 2.55 E 23 molecules of Na2O
A 5.0 L chamber contains equal pressures of H₂ and N₂ at 25 °C. Which of these gases contains a larger number of molecules?
Answer:
C) Both have equal numbers of moles.
Explanation:
The number of moles would be the same under the same pressure, volume and temperature.
"If A 5.0 L chamber contains equal pressures of H₂ and N₂ at 25 °C then both gases would have equal number of molecules according to Ideal Gas Law."
Both contain equal number of molecules.
According to Avogadro's Law, 1 mole of every substance occupies 22.4 L at STP.
Thus, equal volume of all gases contain same number of molecules at same temperature and pressure.
[tex]PV=nRT[/tex]
where, P = pressure
V = volume
n = moles
R = gas constant, and
T = Temperature
As volume , pressure and temperature are equal for both [tex]H_2[/tex] and [tex]N_2[/tex] gases, therefore both gases contains equal moles and hence equal number of molecules.
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Situation No. 1. Joey is about to start working on his experiment about plant
cell using a compound microscope. He noticed that one of the objective lens is
missing and the course adjustment knob is not working. The eyepiece lens is
also broken.
Complete question: Learning Task 4: Read the following situations. Identify the part and the
function of the microscope mentioned in each situation. Write your answers in
your answer sheet.
Situation No. 1. Joey is about to start working on his experiment about plant
cell using a compound microscope. He noticed that one of the objective lens is
missing and the course adjustment knob is not working. The eyepiece lens is
also broken.
Answer: The parts of the compound microscope mentioned in this situation includes:
Objective lens, course adjustment knob and eyepiece lens.
Explanation: A compound microscope is a magnifying instrument which can be used to carry out various experiments in a laboratory. According to the working principle of a microscope, the magnified image of the object (plant cell) is first produced by a lens close to the object called the objective lens. This collects light from the object and forms the primary image. A second lens near the eye called the eyepiece lens enlarges the primary image,converting it into one that can enter the pupil of the eye. The different parts and the functions of the compound microscope observed by Joey includes:
--> Objective lens: The objective lens gathers light from the specimen, which is focused to produce the real image that is seen on the eyepiece lens. It's functions includes formation of primary image and determination of the quality of the image produced.
--> Course adjustment knob: This is the part of microscope that is used in focusing the specimen that is under observation through changing the distance between the lens and the specimen. Therefore it functions to bring the specimen into general focus.
--> Eyepiece lens: This is the lens that is closest to the eye of the observer. It functions to magnify the image formed by the objective lens as it's being placed near the focal length of the objective lens.
Imagine that you skipped from one end of a room to the other end of the room. Explain how gravity affected your motion.
Answer:
when you skipped you jumped up but gravity pulls you to the ground when you jump
Explanation:
On skipping in a room, gravity affects the motion by pulling back to the ground.
Gravity has been defined as the force acting by the earth in the downward direction. It has been the strongest force and has been responsible for life on earth.
On skipping in a room from one end to another, there has been a force applied in the direction against gravity. The application of force has resulted in an upward motion. The gravitational force has been acting in the downward motion, and result in pulling back to the ground.
Thus, on skipping in a room, gravity influences the motion by pulling back to the ground.
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how is carbon dioxide manufacture in the industry
Explanation:
While CO2 can be distilled from the air, that method is expensive and inefficient. Therefore, it is usually captured from other sources where it is a waste material. This could be anything from brewing beer to burning fossil fuels. However, the most efficient way of producing carbon dioxide is from ammonia.
Which of the following is NOT a true statement?
А The sun's gravity keeps the Earth spinning around it.
B The moon's gravity pulls on the Earth's ocean.
C Earth's gravity keeps the moon close to it.
D Earth's gravity keeps all the planets spinning around the sun.
Answer:
c is not a true statement
Answer: it’s
Earth gravity keeps all the planets spinning around the sun.
Explanation:
Got it right
How many grams are in 25.0 moles of carbon tetrachloride (CCI)?
Answer:
3.84 kg
Explanation:
CCl4 molar mass: 153.82 g/mol
n = mass / molar mass
25 moles = mass / 153.82 g/mol
mass = 25 x 153.82
mass = 3845 g or 3,84 kg
When you break an iron magnet into two pieces, you get ____.
two north poles
two south poles
two north poles and two south poles
a piece of iron that is no longer magnetic
Answer:
two north poles and two south poles
Explanation:
A single magnet has a north pole and a south pole. If it is broken into two pieces, then each of the two pieces will have a north pole and a south pole.
No matter how many times or into how many pieces a magnet is broken, the resulting pieces will have two poles each.
Answer:
Each piece will still have a north pole and a south pole.
Explanation:
The Aufbau Principle describes that
O electrons with the same spin cannot occupy the same orbital.
electrons will occupy single orbitals within and energy level before doubling up
electrons fill lower energy levels first before occupying higher energy levels.
O electrons in the same level have the same amount of energy
Answer:
electrons fill lower energy levels first before occupying higher energy levels.
Explanation:
The Aufbau's principle describes that electrons fill lower energy levels first before occupying higher energy levels.
In writing the electronic configuration of atoms, the Aufbau's principle is one of the most important principles to consider.
It states that "sublevels with with lower energies are filled up before those with higher energies".
Sublevels do not fill up in numerical order.
The nucleus of one atom contains 12 protons and 12 neutrons, while the nucleus of another atom contains 12 protons and 16 neutrons. What are the atoms?
A) chromium atoms
B) two different elements
C) two isotopes of an element
D) negatively charged
Answer:
Option C (two isotopes of an element)
Explanation:
An isotope is two or more forms of the same element that contain equal numbers of protons (as well as electrons) but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties. For example :-
Isotopes of carbon ⇒
¹²C₆ (Carbon-12) has 6 electrons , 6 protons & 6 neutrons.¹⁴C₆ (Carbon-14) has 6 electrons , 6 protons & 8 neutrons.In the question , both the atoms have same number of protons , but their number of neutrons isn't same. Hence , they are the isotopes of an element.
how many total atoms are in v2o5
Answer:
7 atoms
Explanation:
1234567 sc: thatbitxh.lizzy
Answer:
okyay
Explanation:
lol
Answer:
12345678
Explanation:
i don't know so yea
30 PTS!! chemistry - a new element chemistry TCT
Answer:
so is this a project or a quiz
Is MgF2 polar or no polar covalent?
Answer:
ionic
Explanation:
In this instance, fluorine is a non-metal while magnesium is a metal. Ionic bonds are always formed when a metal and a non-metal are combined. Therefore, magnesium fluoride is an ionic compound, and an ionic compound's inter-ion force is always an electrostatic force.
The molecule's ionic bond is exceedingly powerful. When a molecule dissolves in water, it releases a significant amount of ions into the mixture. For the same reason, it conducts electricity as well. This explains why magnesium fluoride is naturally polar.
One type of binary ionic compound is magnesium fluoride. It consists of one magnesium atom and two fluorine atoms. In comparison to fluorine, magnesium is a metal with a substantially lower electronegativity.
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10. There are two bears that both have the same proteins for ear shape in their cells. The bears have
different parents. What can you say about the bears' ear shape?
Answer:
They will have the same ear shape since their proteins connect in the same ways to determine ear shape.
Explanation:
I majored in Chemistry
Answer:
They will have the same ear shape since their proteins connect in the same ways to determine ear shape.
Explanation:
how many molecules are in 0.89 of silver
Answer:
5.36 × 10²³ molecules
Explanation:
Given data:
Number of moles of silver = 0.89 mol
Number of molecules = ?
Solution:
Avogadro number:
The number 6.022 × 10²³ is called Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
Number of molecules of silver:
1 mole contain 6.022 × 10²³ molecules
0.89 mol × 6.022 × 10²³ molecules /1 mol
5.36 × 10²³ molecules
If light and sound Travel from point a to point b And start at the same time, which is gonna reach point b first
3.1 Copper is a transition
metal. Which part of the
modern Periodic Table is
copper placed in? (1 mark)
Explanation:
Transition metals occupy the d block of the periodic table. Their location is right between the group 2A and 3A. Copper (Cu) is in the first row of the d-block elements. The image attached illustrates the position of the transition metals relative to other elements in the periodic table.
E. What is one way that your body knows if it is upside-down or not?
Answer:
You get some type of pressure that you start to feel in your muscles and joints from gravity and movement. How do they say it? Something called "seat-of-the-pants" (something like that). You get some type of pressure, and your body senses it, and it knows when you are upside-down or not, because if you're not, then you won't get any pressure in your muscle.
Hope this helped!
Have a supercalifragilisticexpialidocious day!
e the given conversion factors below to convert between mass and number of representative par
plecules, and ions)
oblem: How many molecules of methane (CHA) if there are 9.65 gram of methane ?
Answer:
3.63 x 10²³molecules
Explanation:
Given parameters:
Mass of methane = 9.65g
Unknown:
Number of molecules = ?
Solution:
To solve this problem first, we find the number of moles of the given compound or molecule first.
The given molecule is methane;
CH₄;
Number of moles = [tex]\frac{mass}{molar mass}[/tex]
Molar mass of CH₄ = 12 + 4(1) = 16g/mol
Number of moles = [tex]\frac{9.65}{16}[/tex] = 0.603moles
So;
From mole concept;
1 mole of a substance contains 6.02 x 10²³ molecules
0.603moles of methane will contain 0.603 x 6.02 x 10²³
= 3.63 x 10²³molecules
Which of the following equations is NOT balanced?A MgCO3→MgO + CO2 B NaCl + KI →NaI + KCl C Na + O2 →Na2O D Ca + MgSO4→CaSO4+ Mg
Answer: C
Na + O2 →Na2O
Explanation:
A
MgCO3→MgO + CO2 balanced
B
NaCl + KI →NaI + KCl balanced
C
Na + O2 →Na2O not balanced the balanced would be 4Na + O2 →2Na2O
D
Ca + MgSO4→CaSO4+ Mg balanced
An atom is found in group 17 and contains 10 neutrons. How many valence
electrons does it have? *
How does dormancy most likely help a plant survive?
A.It helps a plant grow taller.
B.It helps a plant absorb sunlight.
C.It helps a plant conserve energy.
D.It helps a plant camouflage itself.
Answer:
C. It helps a plant conserve energy.
Explanation:
Dormancy is a time in a plants life that it stops all physical growth, therefore conserving energy.
Hope this helps.
20 POINTS TO WHO ANSWERS THIS
How can a chemical reaction be sped up?
Select from the drop-down menu to correctly complete the statement.
Increase the to allow the reaction to happen with more energy.
A) Catalyst
B) Concentration
C) Surface Area
D) Temperature
answer: D
Here is a list of the most common ways to speed up a chemical reaction
Increase the temperature (reactions that absorb energy)
Decrease the temperature (Reactions that release energy)
why do water bodies evaporate.
Plss I need help
Answer:
the heat from the sun makes the water molecules move faster and faster, until they move so fast they escape as a gas.
Explanation:
please tell me if I'm wrong
What is temperature
Answer:
I just love the killua pfp
I think b
Answer:
c
Explanation:
because it forces and help it
The mass of the nails and copper sulfate solution used in this investigation was 250g The mass of the copper and tran sulfate solution produced in this
nvestigation would be
250g
Answer:
He it would because 250g is the answer is to 256g
Explanation:
How many molecules are in 643.21 grams of Mg3(PO4)2?
Answer:
643.21g 1 mol 6.022^23
262.87 g 1 mol
= 1.4735E24 [Mg3(PO4)2]