Answer:
1
Explanation:
2
Write the products of these double-replacement reaction. Then balance each equation. a) NaOH(aq) + Fe(NO3)3 (aq)---> Iron (III) hydroxide is a precipitate
Answer:
3NaOH (aq) + Fe(NO₃)₃ (aq) → Fe(OH)₃ (s) + 3NaNO₃ (aq)
Explanation:
Step 1: RxN
NaOH (aq) + Fe(NO₃)₃ (aq) → Fe(OH)₃ (s) + NaNO₃ (aq)
Step 2: Balance RxN
We need 3 OH's on both sides.
We also need 3 NO₃'s on both side.
This will make it so we also need 3 Na's on both side3NaOH (aq) + Fe(NO₃)₃ (aq) → Fe(OH)₃ (s) + 3NaNO₃ (aq)
to make an aqueous solution of 0.223 M magnesium bromide, using a 250 mL volumetric flask. How much solid magnesium bromide should you add?
Answer:
Ok
Explanation:
how are speed and velocity alike?
Answer:
The answer will be listed below.
Explanation:
Speed and velocity both represent a way to measure the change in position of an object relative to time. If the motion is in a straight lne, then the speed and velocity would be the same. When measuring speed and velocity, they are used in m/s.
Which part of the atom is responsible for chemical bonding?
Answer:
valence electrons
Explanation:
The electrons of an atom, in particular valence electrons, are involved in chemical bonding
Why were Democritus's ideas not science?
Answer:
Im not sure because you might have spelled a word wrong.But i believe because of their certain treaditions,belifs,and ways.
Explanation:
If an atom is neutrally charged the number of electrons equals
Answer:
The number of protons
Explanation:
Answer:
number of negative electric charger
explanation
(the electrons ) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral .
Does a clock have internal organization.
Answer:
yes
Explanation:
Make a list of characteristics that all waves have in common
Answer:
sound waves, light waves, radio waves, microwaves and others
Explanation:
these waves have the same fundamental properties of reflection ,refraction, diffraction and interference, and all waves have a wavelength, frequency, speed and amplitude
A new scam on the Internet involves people selling samples of sodium that they collected from a secret river in the mountains. Write a short statement to explain why this is a scam.
Answer:
Explanation:
The reason this is a scam is because they are selling sodium and to sell this product you must have a licence to do so. And secondly, you cant tell the reader that it is from a secret river and sell them a product that reacts when it touches water.
Sodium is a very highly reactive metal that does not occur in free state in nature.
Sodium is a group 1 element. It has a very negative electrode potential which implies that it is highly reactive. Being a highly reactive element, sodium can not occur in free state in nature. It always occurs in combined form as compounds.
Hence, it is impossible to pick up sodium from any secret river in the mountains. Sodium metal is highly reactive hence it has to be stored under paraffin oil. The whole set up is indeed a scam.
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Name two characteristics that a thing must have to be called matter.
Answer:
mass is one
Explanation:
Answer:
mass and volume are the correct answers
1) How much heat is needed to
melt 5.40 grams of ice at its
melting point?
answer: heat needed=18,300
expanation
An amoeba is a one-celled organism. The cell theory states that which of the following characteristics of amoebas must be true?All amoebas have a regular, spherical shape.All amoebas move rapidly using a cilia.All amoebas have organelles called chloroplasts.All amoebas come from other amoebas.
Answer:
I believe the answer is all amoeba come from other amoeba
A balloon has a volume of 6.25 L at 453 kPa. What would the volume of this balloon be at 325 kPa?
Answer:
4.48 L
Explanation:
P1/V1 = P2/V2
453/6.25 = 325/ x
453x = 6.25*325
x = (6.25*325)/453
x = 4.48 L
What is a common event due to transform plate movement at the San Andreas Fault Zone?
Answer:
Earthquakes
Explanation:
took the test
Answer:
earthquake
Explanation:
me and that other guy took the test
LOOK AT THE IMAGE ABOVE CAN SOMEONE PLEASE DO IT WITH FULL STEPS PLEASE I NEED IT TODAY PLEASE PLEASE I WILL MARK YOU BRAINLIST
answer:
IMAGE IS SUPER UNCLEAR SORRY LUV <3
explanation:
your phone must me from 2009 with that trash camera quality sweetie i suggest you get a new one... oh wait you can't you're broke :(
help help help help help help help help help help help help help help help help help
Answer:
Your answer would be B. Have a wonderful day!
Explanation:
Answer:
Answer is B
Explanation:
Which of the following is a main group element?
O Ce
O Co
O Cu
OCs
O none of the above
Who described the atom as being like plum pudding?
A) Robert Millikan
B) J. J. Thomson
C) Niels Bohr
D) Ernest Rutherford
Answer:
B
Explanation:
J.J. Thomson
The plum pudding model is an early 20th century model of an atom. It was later found to be wrong. It was proposed by J.J. Thomson in 1904, after the electron had been discovered, but before the atomic nucleus was discovered.
__
19. SC.912.L.18.12
The picture below shows a group of water skate bugs "walking on the surface of a pond. When an
insect lands or falls into the water, the water molecules vibrate. The water skater uses the resulting
vibrations to find its prey. What property of water enables this bug to stay on the surface of the pond
and not sink?
a. Water's high specific heat enhances the vibrations causing the bugs to float.
b. An optimum pH of the pond water, keeps the water calm so that the bugs don't
sink.
C. The hydrogen atoms, in the water, bond to the bugs' legs keeping the bugs on the
surface.
d. Hydrogen bonds provide cohesion of the water molecules enabling the bugs to stay
afloat.
Answer: Hydrogen bonds provide cohesion of the water molecules enabling the bugs to stay
afloat.
Explanation: Hope it helps :)
Hydrogen bonds provide cohesion of the water molecules enabling the bugs to stay.
Water:
The Earth is made up of 75% water. river, lakes, sea are some of the sources of water. Hydrogen bonds between the water molecules help to bind the molecules together.
Water molecules has cohesive property, due to this cohesive property all the hydrogen molecules bugs can easily afloat on surface of water.
There are the two types of properties such as cohesion and adhesion. Cohesion allows insects to walk.
Option C is the correct answer.
Therefore, Hydrogen bonds provide cohesion of the water molecules enabling the bugs to stay.
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Some oxides are given below. (i)Na2O (ii)NO2 (iii) CO2 (iv) MgO a) Which are the basic oxides among these? b) What is the name of the aqueous solution of CO2 ?
Basic oxides ⇒ metal(usually alkali/alkaline earth) +O₂
L + O₂ ⇒ L₂O
L + O₂ ⇒ LO
Dissolve in water becomes = basic solution
L₂O+H₂O⇒ 2LOH
LO + H₂O⇒ L(OH)₂
So the basic oxides : Na₂O and MgO
Na₂O + H₂O⇒NaOH
MgO +H₂O⇒Mg(OH)₂
The aqueous solution of CO₂(dissolve in water)
CO₂ + +H₂O⇒ H₂CO₃(carbonic acid)
5. Explain the difference between a molecular
element and a molecular compound.
Answer:
is that in a molecule of an element, all the atoms are the same. For example, in a molecule of water (a compound), there is one oxygen atom and two hydrogen atoms. But in a molecule of oxygen (an element), both of the atoms are oxygen.
Explanation:
Answer:
The only difference between a molecule of a compound and a molecule of an element is that in a molecule of an element all the atoms are the same.
Explanation: A molecule of an element all the atoms are the same.
Calculate the mass of 0.5 moles of Co2
And 5 moles of h20
Answer:
Mass of 0.5 moles CO2 is 22 and Mass of 5 moles of H2O is 90
Explanation:
Moles = [tex]\frac{GivenMass}{Molecular Mass}[/tex]
so value of moles is given 0.5 for co2 and 5 for h2o and the molecular mass of co2 is 44 and h2o is 18 so we put these values in
Mass = Moles x Molecular Mass
and we get the answer
ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
An atom of rubidium has 37 protons and 48 neutrons. The atom loses one electron.
What will be the charge on the ion that forms?
36
+1
−36
−1
Answer:
+1
Explanation:
Answer:
-136Step-by-step explanation:
"Loses" means subtraction, decrease, or negative. So, a loss of 1, can also be represented by -1.If protons and electrons can be represented by the same number (37), then a loss of 1 is just, 37 - 1. 37 - 1 = 36.I hope this helps!
Is there a common pattern for valence electrons on the periodic table
Answer:
For neutral atoms, the number of valence electrons is equal to the atom's main group number. The main group number for an element can be found from its column on the periodic table. For example, carbon is in group 4 and has 4 valence electrons. Oxygen is in group 6 and has 6 valence electrons.
Explanation:
Write the products of these double-replacement reaction. Then balance each equation. Ba(NO3)2 (aq) + H3PO4 (aq) ---> Barium phosphate is a precipitate)
Answer:
Explanation:
Step 1: RxN
Ba(NO₃)₂ (aq) + H₃PO₄ (aq) → Ba₃(PO₄)₂ (s) + HNO₃ (aq)
Step 2: Balance RxN
We need 3 Ba's on both sides.
We need 2 PO₄'s on both sides.
3Ba(NO₃)₂ (aq) + 2H₃PO₄ (aq) → Ba₃(PO₄)₂ (s) + 6HNO₃ (aq)
Paul and Karen were studying physical and chemical properties of matter. They determined that the mass of a sample was 50 grams. Which sentence BEST states
how mass describes matter?
A. The mass of a substance is a way to measure the amount of matter it contains.
O B. Mass is a way to measure the force of gravity on a substance.
o
C. Mass is a chemical property of a substance.
D. The mass of a substance may change, based on its location.
Answer:
A
Explanation:
Mass is a measure of the amount of matter in an object.
The mass of a substance measures the amount of matter it contains. Therefore, option A is correct.
What is mass?Mass can be explained as an intrinsic property of an object. Mass can be described the amount of matter in a body. Different atoms or different particles with the same amount of matter possess nonetheless different masses.
Mass can be experimentally determined by the body's inertia, meaning the resistance to an acceleration of the body when a net force is applied. The mass evaluates the strength of the gravitational attraction to the bodies.
The S.I. base unit of measurement of mass can be represented by the kilogram (kg) but it is not the same as that of weight. Mass can be defined as generally measuring the weight utilizing a spring scale, rather than a balance scale and comparing it to already known masses.
A body on the Moon will weigh less than on Earth due to the lower gravity on the moon but still have equal mass. Paul and Karen determined that the mass of a sample was 50 g which is the amount of matter it contains.
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ASAP MULTIPLE CHOICE WILL MARK BRAINLIEST
Which term is defined as the mass of an atom based on the mass of an atom of carbon-12?
atomic charge
atomic mass
isotope
atomic number
Answer: atomic mass
Explanation: Mass is equal to one twelfth the mass of an atom of carbon-12
Which type of force caused the weight to drop (11) after the rope was cut?
Friction Force
Normal Force
Applied Force
Electrical Force
Gravitational Force
Magnetic Force
Answer:
gravitational force.
Why is it more difficult to cause photons to be emitted from neon
Answer:
Neon is a noble gas
Explanation:
It is important to note that the excitation energy of even the lowest excited states of noble gases is greater than the ionization energy of many atoms of other elements.
This is because, the electrons in a noble gas are contained in a filled shell with greater stability than the the atoms of other elements.
Hence, it becomes difficult to excite the neon atom to a higher energy level.
Recall that photons are emitted when atoms of elements return to ground state after being excited to higher energy level.
Since it is difficult to excite neon, it is also difficult to cause photons to be emitted from neon.
Which of the following is the sun responsible for?
A-Earth’s magnetic field
B-Earth’s temperature
C-Earth’s atmosphere
D-Earth’s rotation
Answer:
Im pretty sure it is B. Earths temperature
Explanation: