Answer:
Strontium chloride
Explanation:
get that W
Answer:
Strontium chloride or strontium nitrate
Explanation:
What is the ultimate goal of reproductive strategies?
Answer:
to accelerate progress towards meeting internationally agreed reproductive health targets and, ultimately, to attain the highest achievable standard of reproductive and sexual health for all.
what refers to the effect of gravity
on an
object?
A. mass
B. matter
thing
C. volume
D. weight
Answer: D
Explanation:
Weight by definition is mass multiplied by the acceleration of gravity. So, weight is the force of gravity
PLEASE HURRY!!!! The diagram shows 2 identical charged particle. How does the potential energy and the force of repulsion changes as the charges are brought closer together
Answer:
Please did you ever get an answer??
Explanation:
Im doing usa test prep too and its really late
If a sample of 0.500 moles of hydrogen sulfide (H2S) was reacted with excess concentrated sulfuric acid, how many moles of sulfur dioxide (SO2) would be produced?
Answer:
2.00
Explanation:
They said that was the answer.
If a sample of 0.500 moles of hydrogen sulfide H₂S was reacted with excess concentrated sulfuric acid then, number of moles of sulfur dioxide SO₂ would be produced are 2.00.
What are moles in gases?It is the ratio of mass of element in grams of a given compound and the molar mass of the element. In order to have balanced equation, we have to find the correct number of mole of SO₂. The reaction is
H₂S(g) + 3H₂SO₄ ⇄ 4H₂O(l) + 4SO₂
1 mole of H₂S react with excess of H₂SO₄ to give 4 moles of SO₂.
0.5 mole of H₂S react with excess of H₂SO₄ to give 4 x 0.5 =2.00 moles of SO₂.
Thus, 2 moles of sulfur dioxide SO₂ would be produced.
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An electron in an atom of hydrogen goes from energy level 6 to energy level 2. What is the wavelength of the electromagnetic radiation emitted?
Answer:
410 nm
Explanation:
when an electron falls from ni=6 to nf=2 , a photon of wavelength 410 nm is emitted.
When an electron falls then the wavelength of the electromagnetic radiation emitted is = 410 nm.
What is electromagnetic wavelength?
When The Electromagnetic wavelength directs to the measured distance between the trough or crest of each adjacent wave generated by the electromagnetic disturbance.
When the wavelength of electromagnetic radiation is comparable to the de Broglie wavelength of its quantum (photon).
Now we are Showing that the wavelength of electromagnetic radiation is comparable to the de Broglie wavelength of its quantum (photon).
Therefore, when an electron falls from ni=6 to nf=2, a photon of wavelength 410 nm is emitted.
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What is the charge of the oxygen ion when it has a filled outermost energy level?
A. 2+
B. 2-
C. 1-
D. 1+
What is the Molarity of 0.250 L of solution containing 4.32 g of magnesium
phosphide (Mg3P2)?
A. 0.128 M
B. 0.312 M
C. 1.13 M
D. 1.97 M
Temperature is not a direct measure of thermal energy of a system the total energy depends on its temperature and what other factors?
Answer:
See explanation
Explanation:
There are two main factors that affect the magnitude of thermal energy of a system.
The thermal energy of a system depends on
i) Temperature of the body
ii) Mass of the body
Thus, the greater the mass of a substance at a particular temperature, the greater its thermal energy. Also, at a higher temperature, an object has greater thermal energy.
In a paragraph please explain how the reactivity of potassium has increased its
value. Be sure to discuss one chemical or product that is made from potassium,
it's benefit to humans and how it is made.
Answer:
Potassium is a very high reactive metal. Exposed to water, it explodes with a purple flame. Potassium is involved in the health of cells and of blood vessels, so its reactivity has increased values, being used by scientists for blood pressure as well as lethal injection, enough could cause your heart to stop. Take bananas for example, they contain potassium, enough for humans.
Explanation:
John decided to cycle to his friend’s house at a speed of 28 km/h and the journey took 2 hours. How far did John cycle?
Answer:
THE ANSWER IS 56 :)))
What is a chemical symbol? Give an example.
Answer:
zero two is bae
Explanation:
When are atoms considered to be stable?
Answer:
Atoms are at their most stable when their outermost energy level is either empty of electrons or filled with electrons.
HELP ASAP!!
A student mixes baking soda and vinegar in a glass. The results are shown at left. Do you think any new substances are being created in this mixture? If so, how do you know?
which scientist made the most important discovery concerning indemnifying the sun as a star
Answer: Isaac Newton
Isaac Newton, an English scientist, lived from 1642 to 1727. In 1665 he realized that it was gravity that held the solar system together.
Explanation:
BUT YOULL NEVER BE ALONEEEE
ILL BE WITH YOU FROM DUSK UNTIL DAWWWNNNNN
ILL BE WITH YOU FROM DUSK TILL DAWN
ILL HOLD U WHEN THINGS GO WRONG
ILL BE WITH U FROM DUSK TIL DAWN
ILL BE WITH U FROM DUSK TIL DAWNNNNN
Questlon 5 of 5
What is the main source of energy for plants?
A. Oxygen
B. Water
C. Soil
D. Sunlight
Answer:
D Sunlight
Explanation:
Hoped that helped :)
We have 548 grams of CaCl2. How many molecules of CaCl2 do we have? (The molar mass of CaCl2 is 110.98 g/mol)
Group of answer choices
2.97 x 10^24 molecules
3.66 x 10^28 molecules
9.1 x 10^22 molecules
4.37 x 10^22 molecules
Answer:
Try everything
2.97 x 10^24 molecules
3.66 x 10^28 molecules
9.1 x 10^22 molecules
4.37 x 10^22 molecules
Explanation:
Describe Connections in a Text
Describe the connection between coal power and nuclear power from Turn on the Power. Use the
ideas from the Compare Ideas in a Text activity to describe how the ideas are alike and different.
Coal power and nuclear power are
alike because they both...
Coal power and nuclear power are
different because coal power...
and nuclear power...
Answer:
thanks
Explanation:
Hurry please!! Need fast.
What type of chemical reactions is shown. Any number after the elements symbol represents the subscript.
Fe2(CO3)3 - Fe2O3 + 3CO2
Synthesis
Single Replacement
Decomposition
Combustion
Double Replacement
C12 + K3N -> N2 + KCI
Single replacement
Synthesis
Combustion
Double Replacement
Decomposition
CH4 + O2 -> CO2 + H2O
Double Replacement
Single replacement
Synthesis
Decomposition
Combustion
Na3N + AI(BrO3)3 -> AIN +Na(BrO3)
Double Replacement
Single replacement
Synthesis
Combustion
Decomposition
Which two processes turn layers of loose sediment into hard sedimentary rock? (ASAP)
Answer:
compaction and cementation
Explanation:
Answer:
compaction and cementation
Explanation:
2. in Journey to the Center of the Earth, by Jules Verne, an adventurer travels through the
layers of Earth until he reaches the center. While it is not possible actually to travel through
all of the layers of Earth, in what order would the adventurer have traveled to reach the
center? Rearrange the layers into the correct order Place the outer layer at the top and the
innernost layer at the bottom
1 Crust
3 Outercore
2 Mantie
4 Inner Core
How are the cells produced through mitosis and meiosis different?
Answer:
In mitosis 2 identical cells are created, but in meiosis 4 sex cells are created.
Explanation:
In mitosis there are 5 stages. These stages are prophase, prometaphase, metaphase, anaphases, and telophase. In meiosis there are also 5 stages, they are the same phases, they just end with II. (Ex. Prophases II)
breathe in air container more ____ than breathed out air
a hydrogen
b oxygen
c carbon dioxide
d helium
Answer:
c
Explanation:
carbon dioxide ......
Ammonia (NH3) is produced in the human body as a waste product during the digestion of protein. How many moles of N2 will be needed to produce 87.00 grams of NH3?
N2 + 3 H2 ® 2 NH3
Answer:
43.5
Explanation:
there are 43.5 moles of N2
What is the main problem with renewable energy
sources?
Answer:
biggest problem with mainstream renewable energy is intermittency.
Answer:
the biggest problem with mainstream renewable energy is intermittency.
Wind power is only generated when it's windy.
Solar power is only generated when it's sunny.
This creates several fundamental issues.
The genotype RR would be considered a purebred and the genotype Rr would be considered a hybrid. *
True or False
Answer:
true
Explanation:
Which PAIRS below are PHASE CHANGES that occur at the same temperature? (Choose the 2 correct statements.) *
Freezing and Condensation
Freezing and Melting
Vaporization and Condensation
Melting and Vaporization
Answer:
I would say C and D
Explanation:
Hope this helps my good friend :)
According to the forces of attraction, the phase changes that occur at the same temperature are vaporization and condensation, melting and vaporization .
What are forces of attraction?Forces of attraction is a force by which atoms in a molecule combine. it is basically an attractive force in nature. It can act between an ion and an atom as well.It varies for different states of matter that is solids, liquids and gases.
The forces of attraction are maximum in solids as the molecules present in solid are tightly held while it is minimum in gases as the molecules are far apart . The forces of attraction in liquids is intermediate of solids and gases.
The physical properties such as melting point, boiling point, density are all dependent on forces of attraction which exists in the substances.
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which element has the highest electrical conductivity (h) (Mg) (CL) (He)
4. He
Conductivity is the measure of the ease at which an electric charge or heat can pass through a material.A conductor is a material which gives very little resistance to the flow of an electric current or thermal energy.Electrical conductivity tells us how well a material will allow electricity to travel through it.Usually metals are good conductors of electricity.1. Chlorine is a non metal thus it will have the lowest electrical conductivity.
2. As a plasma, helium's electrons and protons are not bound together, resulting in very high electrical conductivity, even when the gas is only partially ionized.
3. Hydrogen is also electrically conductive above certain temperatures.
4. Since, magnesium is a metal thus it is also electrically conductive in nature but less than hydrogen and helium.
Therefore, Helium will have the highest electrical conductivity.
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The _____ is the identifier of an element.
Answer:
element of a machine-readable form
Explanation:
Most halogens form compounds by
(1 Point)
gaining an electron to form a negative ion.
losing an electron to form a positive ion.
losing protons.
joining with both calcium and carbon.
What holds all the planets and objects in the solar system in place?
Where does it come from?
Answer:
Gravity
Explanation:
i dont rlly know where it comes from...