How much eat is absorbed when 50.0g of water changes from 25.0 Celsius to 37.0 Celsius?
What does an atomic number represent in an atom? number of neutrons number of protons number of electrons number of protons and neutrons
Answer:
The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.
Answer: I'm pretty sure the answer is Number of Protons
Explanation:
I took the k-12 test
Consider the equation:
Ca+O2→CaO
What needs to be done in order to balance the equation?
Place a 2 in front of the Ca and the CaO.
Place a 2 in front of the O2 and the CaO.
Place a 2 in front of the CaO only.
Place a 2 only in front of the Ca.
Isopropyl alcohol is a liquid with a density of 0.785 g/cm^3. How much volume would be taken up be 50.0 grams of isopropyl alcohol
Answer:
63.94 cm³Explanation:
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 we have
[tex]volume = \frac{50}{0.785} \\ = 63.694267...[/tex]
We have the final answer as
63.94 cm³Hope this helps you
A sealed plastic bottle of apple juice is placed in freezer. Which statement describes what is happening while the juice is changing form a liquid to a solid?
A.) Kinetic energy is increasing. B.) Particle motion is coming to a complete stop.
C.) Particle speed is staying the same.
D.) Temperature is decreasing steadily.
Your answer is B Particle motion is coming to a complete stop.That's your answer!
Hope this helps!!!
Answer:
B
Explanation:
i have the same test
Describe how sodium (Na) and chlorine (Cl) interact to form an ionic compound. Specifically, what is happening to an electron?
Etiquetas de productos de casa formula química, nombre de la formula, y el nombre del producto. Ejemplo NaCL, Cloruro de sodio, sal.
Answer:
Azucar, bicarbonato de sodio, lavandina, vinagre, amoniaco.
Explanation:
Podemos numerar estos compuestos
Azucar → Sacarosa → C₁₂H₂₂O₁₁
Lavandina → Hipoclorito de sodio → NaClO
Vinagre → Ácido acético → CH₃COOH
Bicarbonato de sodio → NaHCO₃
Amoníaco → NH₃
The element magnesium is a
O Group 12, Transition Metal
O Period 3, Alkaline Earth Metal
Period 4. Alkali Metal
O Period 4, Halogen
After pollen lands on the stigma of a flower, which of the following happens first?
Help I will give brainlist
The first noble gas with a Lewis Structure with 8 dots is
A. Ar
B. Kr
C. He
D. ne
Answer:
C) He
Explanation:
Helium is one of the noble gases and contains a full valence shell. Unlike the other noble gases in Group 8, Helium only contains two valence electrons.
Would you expect manganese(II) oxide, MnO, to react more readily with HF(aq) or NaOH(aq)?
Answer:
NaOH(aq)
Explanation:
NaOH(aq) is known to precipitate Mn^2+ ions according to the following reaction; Mn^2+(aq)+2OH^−(aq)↽−−⇀Mn(OH)2(s)
Hence, manganese(II) oxide reacts more readily with NaOH(aq) under ordinary conditions precipitating the metal hydroxide solid. This is one of the characteristic reactions of Mn^2+.
please help this is worth half of my grade! what letter represents the trough of the wave a,b,c,d,e
Hello good afternoon...God bless the answer to your following question is D
because...A crest point on a wave is the maximum value of upward displacement within a cycle. A crest is a point on a surface wave where the displacement of the medium is at a maximum. A trough is the opposite of a crest, so the minimum or lowest point in a cycle.
What effect does the spinning of the earth's core have?
A.it creates gravity
B. it creates matter
C. it creates mass
D. it creates the earths magnetic field.
Answer:
c
Explanation:
its c
Earth contains a spinning electric filed. The spinning of earth core creates its magnetic field. Thus, option D is correct.
What is a spinning body?A body which rotates in its own axis is called a spinning body. Earth rotates about its along with revolving around sun. The outer core of earth generates electric current. This is called telluric current.
Flow of this current creates an electric current which is parallels to the surface of earth. The direction of magnetic field lines will be perpendicular to the direction of current. But it comes stronger when parallel to current.
A rotating electric current results in the generation of a magnetic field. Thus spinning of earth core generates a magnetic field and therefore, option D is correct.
To learn more about magnetic field, refer the link below:
https://brainly.com/question/11514007
#SPJ2
Clinical thermomerter
Answer:
Here is the definition: A medical thermometer (also called clinical thermometer) is used for measuring human or animal body temperature.
This is a science question.
What is the acceleration of this helicopter?
Answer:
7m/s
Explanation:
Is the acceleration of the helicopter
Explain why the Earth has four different seasons
Answer:
Earths rotation
Explanation:
Answer:
because if there was not four diferent season we would not have a day or a night because we would not be moving
Explanation:
plsssssssssssssssssssssssssssssssssssssssss help me
Answer:
C
Explanation:
A year is a complete revolution around the Earth
Examine the layers of rock. How does layering provide evidence for determining geologic age?
Answer:
the deeper you go down in to the rock the older the fossils get.
Explanation:
layering can provide evidence because the deeper you go down in to the rock the older the fossils get. So when the scientists go in to the rock they can say what animals lived in that time and what animal was the oldest.
Which type of bond is salt? a. covalent b. valence c. metallic d. ionic
Answer:
D. Ionic
Explanation:
It has ionic bonding! Good luck ^^
Glycerol has a density of 1.26g/mL. What is the mass of 3000.mL of glycerol?
Which of the following is a subsurface event that takes place during the rock cycle?
Group of answer choices
Cementing
Erosion
Melting
Weathering
Answer:
Melting
Explanation:
Could not have been erosion because erosion happens on the surface.
Could not have been weathering because weathering happens on the surface.
So we only have Cementing and Melting left....
The answer is melting, I got 100% on my test.
Hope this helps!!!! :D
Please give brainliest!!!
Answer:
D
Explanation:
In the rock cycle, surface events takes place at the surface of earth. Thus,
weathering and erosion are surface events, while the subsurface events he take place in the deeper section of the earth . Examples of sub surface events are plate tectonics and mountain building or anything that takes place in the inner core of earth.
which statement is a scientific law
Answer:
It is b
Explanation:
A block of lead displaces 50.5ml of water. The block weighs 698 g. From this
information, calculate the density of lead.
Answer:
13.82 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question we have
[tex]density = \frac{698}{50.5} \\ = 13.8217...[/tex]
We have the final answer as
13.82 g/mLHope this helps you