Water
Water is a compound because it is made from more than one kind of element (oxygen and hydrogen).
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:
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
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.
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.
On a cool morning, Uyen’s breath can form a cloud when she breathes out. Which changes of state are most responsible for Uyen seeing her breath in this way?
melting
condensation
deposition
sublimation
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.
electron configuration of calcium
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.
What is a source of energy that is internal to the
earth systems?
A. Sun
B. Moon
C. Tides
D. Radioactive decay
E. All of the above
Answer: The answer is D - radioactive decay
Explanation: I took the test and got this question correct.
A source of energy that is internal to the Earth's systems is radioactive decay which is option D.
The source of energy that is internal to the earth's systems is radioactive decay.
Radioactive decay is a natural process in which unstable atomic nuclei release energy in the form of radiation. The decay of radioactive isotopes found in the Earth's crust and mantle produces this energy. It contributes to the Earth's internal heat and is important in many geological processes, including plate tectonics and volcanic activity. Radioactive decay, unlike external sources such as the Sun, Moon, and tides, is a source of energy that begins within the Earth itself.
Therefore, the correct option is option d
Learn more about Earth's internal energy here:
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Suppose you made 40 atoms of Highlinium and it has a
half life of 2 seconds. How many Highlinium atoms would you expect to be
left after 6 seconds?
Answer:
After 6sec 5 atoms will be left.
Explanation:
Given data:
Total atoms of Highlinium = 40
Half life = 2 sec
Atoms left after 6sec = ?
Solution:
First of all we will calculate the number of half lives passes during 6sec.
Number of half lives = Time elapsed/ half life
Number of half lives = 6 sec / 2sec
Number of half lives = 3
Now we will calculate the number of atoms left
At time zero = 40 atoms
At 1st half life = 40 atoms/2 = 20 atoms
At 2nd half life = 20 atoms/2 = 10 atoms
At 3rd half life = 10 atoms / 2 = 5 atoms
Thus, after 6sec 5 atoms will be left.
how do magnetic forces repel or attract? make it short and simple 25 points
hope this help!
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.
How many liquids are found on the periodic table?
1
There are six liquids found on the periodic table.
1. Bromine
2. Mercury
3. Caesium
4. Gallium
5. Rubidium
6. Francium
If you increase the number of hours that you practice, you can score more goals in soccer.
a. Hypothesis?
b. How could you set up this experiment?
Answer:
A.Hypothesis
Explanation:
Answer:
Yes
Explanation:
Hypothesis: If i increase the number of hours i practice, then i will score more goals in soccer.
Set up. I would have two people who don't play soccer. One will be practicing for one hours every day, and the other will be practicing three hours every day. Based on my hypothesis, the person that is training three hours every day will score more goals than the person training one hour a day.
1. Naturally occurring europium (Eu) consists of two isotopes was a mass of 151 and 153. Europium- 151 has an abundance of 48.03% and Europium-153 has an abundance of 51.97%. What is the atomic mass of europium?
The halogens like to bond with what other group?
O Alkaline earth metals
Alkali metals
O Noble gases
O Transition metals
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.
An object is made from a material that is hard, shiny, and can be hammered into thin sheets.
Which of these is another likely property of the material?
1) it dissolves in water 2)I has a low boiling point. 3) it is a good conductor heat. 4) it’s density is less than that of water
Answer:
3) it is a good conductor heat.
Explanation:
An object is made from a material that is hard, shiny, and can be hammered into thin sheets. The aforementioned properties are those of a metal. Therefore, the other property of a metal is that, it is a good conductor of heat and even electricity because there valence (outer) electrons are delocalized. Some examples of chemical elements that are metals are iron, gold, sodium, silver, copper etc.
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:
i tried to submit an answer earlier but it didn't load
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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
4) Ramon is playing soccer. The ball comes straight at him, and he kicks it to a player on his right. His kick is an example of A) a pull that stops the ball. B) a force that changes the roll of the ball. C) a pull that creates the motion of the ball. D) a force that changes the direction of the ball. Eliminate
Answer:
it's D my guy
Explanation:
Answer:
I took a usatestprep with this same question so i know the answer is D
Hopefully you find this helpful. :)
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:
Please answer this quick!
Answer:
A
Explanation:
Thy are all in the color blue.
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I was riding my bike the other day under some very big power lines on a trail and when ever i touched the brake handles it would shock me and when I was farther away from the power lines it wouldn't hurt as much.
Answer:
When the big power lines are down, electricity is going through the ground and up you bike to the handles, so when yo touch it, you are electrocuted
Explanation:
Using the periodic table, predict which elements will have similar chemical
properties or reactivity?
A.Nitrogen, sulfur, and bromine
B. Rubidium, yttrium, and zirconium
C.Magnesium, strontium, and barium
D.Cadmium, calcium, and carbon
Answer:
C. Magnesium, Strontium, and barium
These four elements are in the same group or family. They are in the alkaline earth metals.
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
What does 120V AC stand for
120V is the AC voltage on a single hot wire in your home with respect to neutral (or ground). ... The 0V line in the middle is the voltage of your neutral line. AC power oscillates at 60 cycles per second (60 Hz) in the U.S. Other parts of the world use a 50Hz standard. The AC voltage oscillates from +120V to -120V
how does lithium change into a cation
Answer:
If it loses an electron it becomes a positive ion. Picture 1.8 Some atoms lose electrons and become positive ions. A lithium atom has 3 protons and 3 electrons. It can lose one of its electrons, making it an ion
Explanation:
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.
Snow that weathers buildings in a city is an example of: A mechanical weathering B acid precipitation carbonation D oxidation
Answer:
A
Explanation:
because its weathering them down.