Explanation:
Carbon-12 (12C) is the more abundant of the two stable isotopes of carbon (carbon-13 being the other), amounting to 98.93% of the element carbon;[1] its abundance is due to the triple-alpha process by which it is created in stars. Carbon-12 is of particular importance in its use as the standard from which atomic masses of all nuclides are measured, thus, its atomic mass is exactly 12 daltons by definition. Carbon-12 is composed of 6 protons, 6 neutrons, and 6 electrons.
electron configuration of calcium
hi i need help. Select all the statements that are true.
a
Cells come in different sizes and shapes.
b
All organisms are made of many cells.
c
Some organisms are made of just one cell.
d
All cells are the same size and shape.
e
Most cells are too small to see with the naked eye.
Answer:
A, C, E
Explanation:
hope this helps
The true statements are - Cells come in different sizes and shapes, some organisms are made of just one cell and most cells are too small to see with the eye. Thus, the correct options are options A, C and E.
Cells are the basic structural and functional units of life. They are the smallest entities that can carry out the fundamental processes necessary for an organism's survival.
Cells are enclosed by a cell membrane, which separates the internal components from the external environment. Inside the cell, various parts perform specific functions, such as energy production, protein synthesis, and storage of genetic material.
Cells can be categorized into two broad types: prokaryotic cells, which lack a nucleus and eukaryotic cells, which have a nucleus.
Thus, the ideal selection is option A, C and E.
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HURRRYYYY!!!!!! A nonmetal in the same group as Pb
Answer:
carbon C
Explanation:
In this ecosystem, energy storage molecules are found inside organisms.
TRUE OR FALSE
20 POINTS PLZ HELP ASAP
Answer: This is true! Living organisms use two major types of energy storage.
how do magnetic forces repel or attract? make it short and simple 25 points
hope this help!
Which of the sun’s layers is called the sun’s furnace?
Answer:
The core of the sun
Explanation:
The core of the sun acts like a furnace. The sun's energy comes from nuclear fusion
chromium-58 is a(an)
Answer:
Element
Explanation:
Chromium (24th Element) has 24 protons and 24 electrons.
Chromium is a Transition Metal.
Chromium has a molar mass of 52.00 g/mol.
Chromium-58 has 34 neutrons, 24 protons, and 24 electrons.
A model stands on a scale and finds her weight to be 105 pounds. If
the pressure exerted by her feet on the scale is 2.16 pounds per
square inch, what is the area of her feet in cubic centimeters?
__cm2
The area = 313.612 cm²
Further explanationForce (F) can cause objects to move
While pressure (P)is the force per unit area
[tex]\tt P=\dfrac{F}{A}[/tex]
weight=force=105 pounds(lb)⇒english units
pressure = 2.16 lb/in²
Thea are (A)
[tex]\tt A=\dfrac{F}{P}=\dfrac{105}{2.16}=48.61~in^2\\\\1~in^2=6,4516~cm^2\\\\48.61~in^2=313,612~cm^2[/tex]
What are 4 things an element can do with electrons
Answer:Each shell can hold a maximum number of electrons. moving through the elements in the periodic table, each atom has one more electron than the last because the number of electrons is the same as the atomic number. Electrons occupy the shells in order, starting with the shell that is nearest the nucleus.
Explanation:
The halogens like to bond with what other group?
O Alkaline earth metals
Alkali metals
O Noble gases
O Transition metals
THIS IS URGENTTT!!
can someone summarise the speed of sound for me? :) I'm not rly good at science ahah, anyone good at it.?
increasing temperature:
causes particles to ....?
which means that sound will travel...?
making something more solid:
causes particles to ....?
which means that sound will travel...?
Explanation:
The speed of sound is the distance that sound waves travel in a given amount of time. ... Generally, sound waves travel most quickly through solids, followed by liquids, and then by gases. For a given medium, sound waves travel more slowly at lower temperatures.
Answer:
increasing the temperature will also increase the number of collisions between molecules per unit time. Which means molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly.
Slow down, but generally not move from there place. Which means molecules at a lower temperature have less energy, meaning sound waves can't travel through in a solid.
Explanation:
Sound waves can only travel in space if there are enough particles around to transmit the energy in the wave from the source thus meaning more kinetic energy more sound waves being able to quickly get through
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What is the difference between melting and melting point
Answer:
Melting Is when a substance is actually melting and melting point is a point at which a substance is able to melt.
how many ML is this ?
Answer:
It's right below 620. So id say 618 ML
Explanation:
Which of the following elements typically attract 1 electron to its valence shell?
Answer:
Hydrogen lithium and sodium
I need help with this before 11:15 please.
For 1 it is balanced for both Net Horizontal force and net vertical force.
For 2 Vertical is balanced and horizontal is unbalanced.
For 3 vertical is not horizontal is.
For 5 both are balanced.
for 6 vertical is, horizontal is not.
for 7 vertical is horizontal is not.
for 8 neither are balanced.
Explain what happens when energy is increased
on the three phases of matter.
Answer:
If we begin with a cube of ice composed water molecules in a crystalized form we are dealing with water molecules with their lowest amount of energy. These molecules have such low amounts of energy that their movement is almost imperceptible. This form of matter for water is at and below 0 C.
If we add heat to the ice thereby increasing the energy in the molecules of water these molecules begin to vibrate at much higher velocities. These vibrations allow for the molecules of water to escape their positions in the crystal and begin to flow into a liquid. This range of temperature is from 0 C to 100 C.
If we continue to add energy and drive the temperature up to 100 C the molecules of water will vibrate so rapidly that they will break away from the liquid form and move into a gaseous state as steam escaping into the the air. This vaporization actually takes place constantly at the surface of the water creating a thin vapor layer at the surface of any body of water.
This is a simplification of the chemical process but basically the amount of energy in the molecules will determine the phase of matter.
Explanation:
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What happens to the number pf protons in an atom as you move across a period.
The number of protons increase
The number of protons stay the same The number of protons decrease
Answer:
A. The number of protons increase.
Explanation:
Each element rank is determined by the number of protons.
Hydrogen is #1 with 1 proton, Helium is #2 with 2 protons, Lithium is #3 with 3 protons, and so on.
Please answer this quick!
Answer:
A
Explanation:
Thy are all in the color blue.
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A scientist is unsure about the accuracy of her experiment. She has checked her equipment and found it to be in good working order, checked her data and found it to be accurate, and reviewed her interpretation of the data, which she found to be logical. What should she do in addition to check the accuracy of her results?
Group of answer choices
Answer:
repeat the experiment
Explanation:
I am big brain. if she wants to know if it is correct, repeating the exact ay would show her if it is right or if she did something wrong
What is molarity a measurement of?
A. The concentration of a substance dissolved in a liquid
B. The grams of a substance dissolved in a liquid
C. The volume of liquid containing a dissolved substance
D. The number of moles of a dissolved substance
Answer:
A. The concentration of a substance dissolved in a liquid
Explanation:
Molarity is the mol/L of solution, so it is the concentration of the substance, in moles, in a certain volume of solution.
which two elements on the periodic table are in the same period?
Answer:
Platinum and Gold ig.
The weight of a medium sized apple is about _____. A) 1N B) 2N C) 1kg D) 2kg
Answer:
1n
Explanation:
A baseball player hits a ball towards the outfield. *
Newton's 1st Law
Newton's 2nd Law
Newton's 3 Law
Law of Universal Gravitation
Law of Conservation of Momentum
Answer:Newton's 2nd law
Explanation:
Answer: newtons 2nd law
Explanation:
Why do we believe that these strange quantum laws are correct? Group of answer choices Experiments show they're sometimes right. There haven't been any experiments done on them because they can't be tested, so we just think they're right. In experiment after experiment, they're always right. We actually don't believe they're right, we just like to talk about them.
Answer:
In experiment after experiment, they're always right
Explanation:
In science, nothing is accepted unless it can be supported by empirical evidence, this includes the quantum laws.
A plethora of experiments have confirmed these quantum laws to be correct and reliable.
Hence, all the quantum laws are backed up by plenty scientific evidence that show that the laws are indeed correct.
Below is a bar graph on candy allowance compared to the child's happiness.
What is the dependent variable of this experiment?
A) average level of happiness
B) how often do you eat candy
C) type of candy
D) if candy is given as a reward
Answer:
There is no bar graph attached to this question, however, the question can be answered based on the information given in the question.
The answer is A) average level of happiness
Explanation:
In an experiment, the dependent variable is the variable which is measured by the experimenter. It is the variable that responds to changes made to another variable called independent variable.
In the case of this question, it can be determined, even without the bar graph, that the experiment entails how candy allowance affects a child's happiness. Hence, the candy allowance is changed to influence or cause a response in the child's happiness, which is then measured. Therefore, the AVERAGE LEVEL OF HAPPINESS is the dependent variable.
What does it mean to be soluble?
Answer:
Well, in order for a substance to be soluble, it needs to be able to be dissolved, especially in water.
In which of the following is the name and formula paired correctly?
A) ammonium sulfate, (NH4)2S
B) lithium carbonate, LiCO3
C) iron (III) phosphate, FePO4
D) magnesium dichromate, MgCrO4
Answer:
C is the correct formula
Explanation:
The density of silver is 10.5 g/cm3. What is the volume of the silver if it has a mas of 38.4 g
Answer:
The answer is 3.66 mLExplanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\[/tex]
From the question
mass = 38.4 g
density = 10.5 g/cm³
We have
[tex]volume = \frac{38.4}{10.5} \\ = 3.6571428...[/tex]
We have the final answer as
3.66 mLHope this helps you
The diagram shows a model of an atom. The model has four different symbols on it. Each symbol represents a
different role for one of the particles within the atom.
Model Atom
w
In this model, which particle determines the reactivity of this atom?
A W
ОВ. Х
O C. Y
O D. Z
The Answer is particle Z
Answer:
The model is particle W
Explanation:
how did the ancient greek understanding of atomic particles likley influence dalton research?
Answer:
The Greeks called these particles atomos, meaning indivisible, and the modern word “atom” is derived from this term. Democritus proposed that different types and combinations of these particles were responsible for the various forms of matter.
Explanation:
hope it helps
The idea of indivisibility of the atom upheld by Dalton was largely derived from early Greek philosophers.
John Dalton was the first scientist to begin an empirical study of atomic theory. Before this time, all that was known about the atom were largely based on the speculation of Greek philosophers.
However, one recurring theme among Greek philosophers is that atoms are indivisible. This idea that atoms are indivisible became a very strong pivot of the Dalton's theory of the atom.
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