Answer:
Sodium and Chlorine
Explanation:
Elements are most likely to form an ionic bond when one element is a metal and the other one is a nonmetal.
Sodium is a metal and Chlorine is a nonmetal.Lithium is a metal and Neon is a noble gas.So as you can see, sodium and chlorine is the answer.
Hot glassware has a red glow to it
O True
O False
Answer:
false it has a green glow to it
What is the freezing point, in °C,
of a 1.56 m aqueous solution
of K3PO4?
Note: K for water is 1.86 °C/m
Enter rounded answer to three decimal points.
Answer:
1,380 °C hope this is the right answer
[tex]\boxed{\sf \Delta T_f=K_fm\times i}[/tex]
i is vant of factorFor K_3 PO_4
It shall release 3K+ and PO_4- ions
So vant Hoff factor is 4Now
[tex]\\ \rm\Rrightarrow \Delta T_f=1.56(4)(1.86)[/tex]
[tex]\\ \rm\Rrightarrow \Delta T_f=11.6°C[/tex]
It can be freezed easily at room temperature in UK or Siberia
Why are weather satellites useful in areas that are affected by hurricanes?
Answer:
Since they are in a geostationary orbit, the GOES satellites provide continuous monitoring of the Earth's surface. They are able to constantly monitor the life cycle of significant weather such as hurricanes, tornadoes, flash floods, and hail storms.
Answer:
NOAA's GOES East and West satellites also show the storm's evolution by measuring infrared and visible radiation from the atmosphere and surface in real-time. These measurements tell us about wind at various levels in the atmosphere, sea surface temperatures and cloud properties.
What are three ways soil can be sustained?
Answer:
Increasing soil protection by crop residues and plants; adding organic matter to the soil through crop rotations, manures, or crop residues; and careful management of fertilizers, pesticides, tillage equipment, and other elements of the farming system can improve soil quality.
how does sublimation occur and why does it not pass through the liquid phase?
Answer:
Sublimation is the process of transformation directly from the solid phase to the gaseous phase, without passing through an intermediate liquid phase. ... This is because the pressure of their triple point is very high and it is difficult to obtain them as liquids.
what is the mass number of an atom with 3 protons, 4 neutrons, and 3 electrons
Answer:
The mass number is 7
Explanation:
mass number = protons + neutrons
= 3 + 4
= 7
Write the following number in Standard (Numeric) Form. 5.8x10-5
Answer:
the answer of this question is 0.000058
The standard (numeric) form of 5.8 x 10⁻⁵ is 0.00005.
What is the standard (numeric) form?The standard (numeric) form is a way of writing very large or very small numbers in a simplified form that uses powers of 10.
In this form, a number is expressed as a single digit between 1 and 10, multiplied by a power of 10. The power of 10 indicates the number of places the decimal point must be moved to the left or right to obtain the original number.
In the case of 5.8x10⁻⁵, the number is a very small one. The power of 10 is negative, which means that the decimal point must be moved to the left by 5 places to obtain the original number.
Here is the expansion of 5.8x10⁻⁵ in the standard (numeric) form:
5.8 × 10⁻⁵
= 5.8 ÷ 100000
= 0.000058
Therefore, 5.8x10⁻⁵ can be expressed in standard (numeric) form as 0.000058.
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What is the energy based on the motion of electrons
Answer:
Kinetic energy is motion; it is the motion of waves, electrons, atoms, molecules, substances, and objects. Electrical energy is the movement of electrons.
Explanation:
Mark me as the brainliest
Answer:
La electricidad es una forma de energía que se manifiesta con el movimiento de los electrones de la capa externa de los átomos que hay en la superficie de un material conductor. La electricidad es un fenómeno íntimamente ligado en la materia y a la vida.
Explanation:
dame coronar
Conversion of gaseous nitrogen to liquid nitrogen is an
example of a chemical change.
TRUE
FALSE
Answer:
true
Explanation:
you can't change it back, it's chemically changed
Employers may not fire or other wise discriminate against an employee who does which of the following
Answer:
race, religion, sex, if they are 40 or older, have a disability, pregnancy/childbirth. hope that helped
Which is a characteristic of the part of the atom marked “A”?
•it contains most of the mass
•it is negatively charged
•it is mostly empty space
•it is composed of electrons
Answer:
it contains most of the mass
David noticed that when he ate chocolates they melted in his hands faster when his hands were slightly wet from sweat than his hands were dry. He was curious to see if other liquids would affect how fast they would melt? He decided to test out four different liquids, water, milk, lemon-lime soda, and orange juice. He then timed how long it took them to melt. He thought the chocolate would melt faster in orange juice that the other liquids because it is more acidic. The results are below.
QUESTIONS:
1) What was David's Question?
2) What was David Hypothesis?
3) What his independent Variable?
4) What his Dependent variable?
Answer:
1. What liquid would melt the chocolate faster?
2. He thought that the orange juice would melt the chocolate faster.
3. The independent variable is the liquids.
4. The dependent variable is the chocolate.
Explanation:
1. He was curious to see if other liquids would affect how fast they would melt? This is his question.
2. He thought the chocolate would melt faster in orange juice than the other liquids because it is more acidic.
He made a prediction or a hypothesis.
3. His independent and dependent variables are chocolate and liquid. Since he wants to know how fast the chocolate melts in different liquids, how fast the chocolate melts is dependent on the liquid that he uses.
Define the following terms:
-hypothesis:
- theroy:
-law:
Answer:
hypothesis = A tentative explanation for a question, testable through experiments.
theory = An explanation supported by many experiments, answers "why".
law = A relationship in nature supported by many experiments.
Explanation:
.. When water boils, you can see bubbles rising to the surface of
the water. Of what are these bubbles made?
a. air
b. hydrogen and oxygen gas
c. oxygen gas
d. water vapor
e. carbon dioxide gas
Answer:
Explanation:
It's water vapor. There is enough heat present to get the water to boil but not enough to break it into its chemical components (oxygen and hydrogen), so the answer is D.
a molecule of an element is called what?
Answer:
a molecule of an element is called atomicity
How many parents are needed to produce a baby tiger?
Answer:
Only 2
Explanation:
can you answer these questions about recycling glass ?
Answer:
they keep the plastic bottles and make a Christmas decoration from it to use
a student wants to test the effect of different amounts of caffeine of different amounts of caffeine on the heart rate of daphnia, a small crustacean. What is the dependent variable?
The dependent variable is the heart rate of daphnia, a small crustacean.
WHAT IS INDEPENDENT AND DEPENDENT VARIABLES?
In an experiment, two variables are important. These two variables are the independent variable and dependent variable.
The independent variable is the variable that the experimenter alters or changes in order to bring about a change. On the other hand, the dependent variable is the variable that the experimenter measures or records in response to a change in the independent variable. In this question, a student wants to test the effect of different amounts of caffeine on the heart rate of daphnia, a small crustacean. The student will change the amount of caffeine, making it the INDEPENDENT VARIABLE while the heart rate of the small crustacean will be measured, making it the DEPENDENT VARIABLE.Therefore, the dependent variable is the heart rate of daphnia, a small crustacean.
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define each of the terms below IN YOUR OWN WORDS
Environmental Value System:
Entropy:
Equilibrium:
Feedback:
Feedback, negative:
Feedback, positive:
Gaia:
Model:
Answer:
1- Environmental Value System or EVS is a worldview that molds the way both individuals and the societies they form perceive and therefore evaluate environmental concerns.
2-Entropy/ the measure of a system's thermal energy per unit temperature that is unavailable for doing useful work.
3-Equilibrium/a state of balance between opposing forces or actions that is either static
4-Feedback/a return of information about a result or the returned portion of a process.
5-Feedback,negative/ is a self-regulatory system in which it feeds back to the input a part of a system's output so as to reverse the direction of change of the output.
6-Feedback,positive/ is the amplification of a body's response to a stimulus.
7-Gaia/ all organisms and their inorganic surroundings on Earth are closely integrated to form a single and self-regulating complex system
8-Model/a physical and/or mathematical and/or conceptual representation of a system of ideas, events or processes.
Describe what happens to the arrangement and movement of particles when a substance boils.
Answer:
When boiling a substance, the particles obtain more kinetic and potential energy from the heat being delivered. The kinetic energy means that the particles starts moving more intensely, and the potential energy means that the particles start to move away further from each other, which means the substance expands in volume.
Explanation:
When a liquid is heated, the particles gain energy and begin to move faster and faster, expanding the liquid. As the liquid warms, the most energetic particles at the surface escape as vapor from the surface.
What are particles?A particle is a small localized object to which several physical or chemical properties, such as volume, density, or mass, can be assigned in the physical sciences.
Atoms are small units of matter that contain a number of particles known as subatomic particles. The term particle, on the other hand, refers to any small object.
As a result, the primary distinction between atoms and particles is that atoms are small units composed of multiple particles, whereas particles are minute portions of matter.
When a fluid is subjected to heat, the particles acquire energy and start moving extremely fast, causing the liquid to expand.
The much more energetic particles at the exterior getaway as vapor phase from the surface as the liquid warms.
Thus, the arrangement and movement of the particles gets disturbed when a substance is boiled, and it gets escaped as vapor.
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What are the two key ingredeints that help science move forward?
Answer:
science needs both ideas the hypothesis and facts the quantitative results to move forward
Explanation:
the two primary features of a scientific hypothesis are falsifiability and testability which are reflected in an If…then statement summarizing the idea and in the ability to be supported or refuted through observation and experimentation
Enzymes are catalysts that affect biological reactions. How do enzymes
change the rates of reactions in the body?
A. Enzymes increase reaction rates by lowering the activation energy.
B. Enzymes decrease reaction rates by lowering the activation
energy
C. Enzymes decrease reaction rates by decreasing the energy of the
products.
D. Enzymes increase reaction rates by increasing the energy of the
reactants.
What quantity measures the amount of matter in an object?
Answer:
mass
Explanation:
Which of these could be a measurement of an object’s mass?
a. 24 newtons
b. 24 grams per milliliter
c. 24 meters
d. 24 grams
Answer:
Mass is a measure of the amount of matter in a substance or an object. The basic SI unit for mass is the kilogram (kg), but smaller masses may be measured in grams (g). To measure mass, you would use a balance.
based on the particle model of matter, which statement below is NOT correct?
A. All matter is made of tiny particles
B. Removing energy causes particles of matter to move faster.
C. Particles of matter are aways moving.
D. Particles of matter have spaces between them.
Answer: C
Explanation: I believe it's C because I know A, B, and D are 100% correct
and if you look at solids, there pact together, pact together mean it cant move.
A central atom has two lone pairs on opposite sides and four single bonds. What is the molecule geometry of the result?
The molecular geometry is square planar.
According to the Valence Shell Electron Pair Repulsion theory (VSEPR), the shape of a molecule is determined by the number of valence electrons surrounding the outermost shell of the central atom in the molecule.
In this case, the expected geometry based on VSEPR theory is octahedral. However, the lone pairs on opposite sides of the four single bonds leads to a square planar molecular geometry.
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How many grams are there in 6 moles of water, full working out?
1 mole of water = 18g
6 moles of water = 18×6 = 108 g
what is the volume of a piece of metal that has a density of 6.68g.cm^3 and has a mass of 1975 g?
Answer: 296 grams/cm^3 (3 sig figs)
Explanation: Divide the mass by the volume to get grams/cm^3.
Chemical bond meant by.... what?
Answer:
Chemical bonding, any of the interactions that account for the association of atoms into molecules, ions, crystals, and other stable species that make up the familiar substances of the everyday world.
Answer:
A chemical bond is the physical phenomenon of chemical substances being held together by attraction of atoms to each other through sharing, as well as exchanging, of electrons -or electrostatic forces.
when a scientist is beginning the process what is the key term she or he must ask in order to begin?
A: when or where
B:why or how
C: who or how many?
D: which or what
plz help thank you
Answer:
B- why or how because any scientist deals with matter it's relationships ,properties and its composition which can be inferred from the questions why and how
