Answer:
18
Explanation:
go go evhdj kk nm go go go
State which statement is a physical change or a chemical change:
(a) Sawing wood
(b) Cooking eggs
(c) Melting chocolate
(d) Chewing sweets
(e) Rusting iron
(f) Filing your fingernails
(g) Milk turning sour
(h) Blow-drying your hair
(i) Boiling water
(j) Baking a cake
(k) Burning a match
Answer:
Physical change: A,C ,D, F, H, I
Chemical Change: B, E, G, J, K
which best represents a compound?
Answer:
The one above B
Explanation:
The one above B is most represents a compound because compounds are chemically bonded and are always near each other.
Which is NOT a shape of epithelial cells?
A.Cuboidal
B.Columbar
C.circular
D.squamous
3 way to make bases
Based on the figure below, what do the elements of a group (family) have
in common
Answer:
Explanation:
Send figure below
Janet is sliding a box across the floor what does she need to know to calculate the force on a box?
Answer:
She needs to know the Mass and acceleration
Janet needs to know the mass of the box and acceleration .
What is force?Force is defined as a cause which is capable of changing the motion of an object. It can cause an object which has mass to change it's velocity. It is also simply a push or a pull . It has both magnitude as well as direction.Hence, it is a vector quantity.
It has SI units of Newton and is represented by'F'.Newton's second law states that force which acts on an object is equal to momentum which changes with time. If mass of object is constant, acceleration is directly proportional to net force acting on an object.
The concepts which related to force are thrust and torque .Thrust increases the velocity of an object and torque produces change in rotational speed of an object.
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How do the products of chemical reactions compare to their reactants?
Question 5 options:
The products often have completely different properties than the reactants.
The products usually weigh more than the reactants.
The products usually have more atoms than the reactants.
The products are usually more toxic than the reactants.
Answer: The products usually weigh more than the reactants.
Explanation:
Answer:
A
Explanation:
i just took the k12 test
.Which statement about transition elements is correct?A Their soluble salts usually form coloured aqueous solutions. B They are all in the same group of the Periodic Table. C They are non-metals with high melting points. D They can be mixed together to form compounds
Answer:
A Their soluble salts usually form coloured aqueous solutions
Convert 62.5 L to mm
3
Answer:
0.0625
Explanation:
Answer:
62,500
Explanation:
Match each term with the correct description below.
1. what is a charged atom that has gained one or more electrons?
2. What substance is held together by ionic bonds?
3. What metal and nonmetal transferrers electrons?
4. What particle has electrons that are shared unequally?
5. What forms when atoms share electrons by covalent bonds?
6. What two nonmetals share electrons?
7. What charge atom that has lost one or more electrons?
8. What two or metals "pooling" electrons?
a. metallic bond
b. covalent bond
c. anion
d. ionic bond
e. molecule
f. cation
g. compound
h. polar molecule
Answer:
1. anion
2. compund
3. ionic bond
4. polar molecule
5. molecule
6. covalent bond
7. cation
8. metallic bond
Explanation:
PLEASE HELP
The Octet Rule explains why
A. Atoms form chemical bonds to create compounds
B. The electronegativity of fluorine is higher than chlorine
C. Ionic compounds have high boiling and melting points
D. Valence electrons are used in chemical bonding
E. Valence electrons are used in chemical bonding
It's not D that's all I know. Please answer with an explanation if you know.
Answer:
Explanation:
E
Negative ions have ______ (More or Less) protons than electrons.
Answer:
Less
Explanation: I took the test.
Answer: negative ions have less protons than electrons.
Explanation:
Some things that can be made from coal are...
A. All of the above
B. Tar
C. Generating power
D. Plastics
E. Fertilizer
Answer:A
Explanation:just casuse
n which phase(s) of matter are the atoms closely packed but still able to slide past each other?
gas
liquid
solid and gas
liquid and solid
Answer:
I belive its liquid if I'm right because liquids are packed together when they take shape but they are still able to move.....brainliest???
Answer:
Liquid
Explanation:
Please don't jugde me if I got it wrong
The three types of symbiosis are ___ and ___
Answer:
mutualism,commensalism and parasitism
Answer:
mutualism, commensalism, and parasitism
Learning Task No. 3: Write a short paragraph regarding the differences between
saturated and unsaturated solutions.
Type of Solution
Explanations about the differences of
the two solutions
Saturated solution
Unsaturated solution
Answer:
See explanation
Explanation:
A saturated solution is a solution that contains just as much solute as it can normally hold at a given temperature in the presence of undissolved solute. An unsaturated solution contains less solute than it can normally hold at a given temperature. A saturated solution can not dissolve more solute whereas an unsaturated solution can comfortably dissolve more solute until it attains saturation at a specified temperature.
The rate of change of position (or distance traveled) with respect to time"
Answer:
Velocity...I believe
Answer: velocity or meters per second
Explanation:
what is the electron configuration for lithium
Answer:
2,1
Explanation:
the electron configuration is 2s1
A candy bar has ____ energy.
A. Kinetic
B. Potential
Answer:
Potential energy
Explanation:
A candy bar has carbs, sugars, and calories which are potentially going to be used as energy in a body.
Answer:
B. Potential
Explanation:
Because the candy bar is sitting still.
Write a Formula
Compound Name: Strontium Sulfate
Answer:
it's SrSO4
Explanation:
This is a change in an objects motion caused by an unbalanced force
Answer:
This is a change in an objects motion caused by an unbalanced force.
- Acceleration
Answer:
Pressure
Pressure is done when a force is applied to an object to course a motion
I WILL MARK BRAINLIEST!!!!! !!
(picture included with one question ^^^^^^^)
Answer:
type D
balance form .b
Explanation:
There is free rotation about the carbons of ethane but not th
of ethane. This is due to the fact that
A. the carbons in ethane are round
Balkenes do not rotate
C. the carbons in ethane are linked by double bonds
D. the carbon in ethane are smaller than those of ethane
Answer:
C. the carbons in ethene are linked by double bonds
Explanation:
The reason for the lack of free rotation about the carbons of ethene is that they are linked with with double bonds.
In single bonds afforded with the ethane compound, there is free rotation.
The double bonds confer a special restriction on the rotational potential of the bonded atoms round the carbon.
The radioactive isotope used in the dating of fossils thought to be less than 40,000 years old is ________________.
Fill in the blank.
Answer:
The answer is Radiocarbon
In the following reaction, how many grams of H2O are produced if 2.00 g of N2H4 react? N2H4 + 3 O2 ---> 2NO2 + 2H2O
Answer:
2
Explanation:
From this equation, 2 grams are produced.
The mass of H₂O produced from the reaction is 2.25 g
We'll begin by calculating the mass of N₂H₄ that reacted and the mass of H₂O produced from the balanced equation.
N₂H₄ + 3O₂ —> 2NO₂ + 2H₂O
Molar mass of N₂H₄ = (2×14) +(4×1) = 32 g/mol
Mass of N₂H₄ from the balanced equation = 1 × 32 = 32 g
Molar mass of H₂O = (2×1) + 16 = 18 g/mol
Mass of H₂O from the balanced equation = 2 × 18 = 36 g
SUMMARY
From the balanced equation above,
32 g of N₂H₄ reacted to produce 36 g of H₂O.
Finally, we shall determine the mass of H₂O produced by the reaction of 2 g of N₂H₄From the balanced equation above,
, 32 g of N₂H₄ reacted to produce 36 g of H₂O.
Therefore,
2 g of N₂H₄ will react to produce = (2 × 36) / 32 = 2.25 g of H₂O
Thus, the mass of H₂O produced from the reaction is 2.25 g
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A solid is composed entirely of xenon atoms. What type of solid is it?
a) ionic
b) metallic
c) covalent network
d) atomic
e) molecular
f) amorphous
Answer:
ionic
Explanation:
xenom atoms are too large to move in the crystals without first associating with two oxygen ion vacancies and one uranium ion vacancy
. The model shows Earth in several positions relative to the Sun. In which position is it winter in North America?
Are ionic compounds not carrying a charge?
Answer:
yes they carry charges
Which pair of elements is most likely to form an ionic compound with each other?
sulfur and carbon
barium and chlorine
oxygen and fluorine
calcium and sodium
Atoms that gain
an electrons
have a _____
Charge?
Answer:
positive
Explanation:
