Answers
Answer:
The real answer for a is-He(helium)4,002602
The answer for b is-Mg(Magnesium) 24.305
Related Questions
I WILL MARK BRAINLIEST!!!!! !!
(picture included with one question ^^^^^^^)
Answers
Answer:
type D
balance form .b
Explanation:
7th grade help me plzzzzzzzz
Answers
Answer:
1. Metals
2. Solid, gas, liquid
Explanation:
For #1:
The majority of elements in the periodic table are classified as metals. The transition metals lie in the center of the table, spanning groups three through 12. These elements are solid at room temperature, except mercury, and have the metallic color and malleability expected of metals.
Hope this helps :)
The three types of symbiosis are ___ and ___
Answers
Answer:
mutualism,commensalism and parasitism
Answer:
mutualism, commensalism, and parasitism
A candy bar has ____ energy.
A. Kinetic
B. Potential
Answers
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.
What is the density of an object (g/cm) that has a mass of 2.78 g & a volume of 10.0
cm3?
Answers
Answer:
The answer is 0.28 g/cm³Explanation:
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{2.78}{10} \\ = 0.278[/tex]
We have the final answer as
0.28 g/cm³Hope this helps you
Answer:
p = 0.278 g/cm3
Explanation:
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
Answers
Answer:
Physical change: A,C ,D, F, H, I
Chemical Change: B, E, G, J, K
points)
(06.01 LC)
Based on the kinetic theory, which statement is true? (4 points)
A
Matter consists of only large molecules.
B
Matter is made up of only charged particles.
C
The particles of matter have zero kinetic energy and potential energy.
D
The particles of matter are arranged in different ways for the different state.
Answers
Answer:
D .The particles of matter are arranged in different ways for the different state.
Explanation:
The kinetic molecular theory is used to explain the forces between molecules and the energy the molecules possesses.
One of the key postulate of this theory is that;
The particles of molecules are continual state of motion. They posses kinetic energy. In gas, the particles are random and moves in a straight line motion. Liquids are less random and only slide past one another. Solids have a restricted space and the molecules are free to move about.Therefore, we can see that the particles of matter are arranged in different ways for different state.
Can someone pls answer quickly?
Answers
answer is atom.Hope it is helpful.
Answer:
Atoms are the smallest particles that made up matter.
What is the enthaply of dissolution?
Answers
Answer:
The enthalpy change of solution refers to the amount of heat that is released or absorbed during the dissolving process (at constant pressure).
Explanation:
The enthalpy of solution is most often expressed in kJ/mol at constant temperature. The energy change can be regarded as being made of three parts, the endothermic breaking of bonds within the solute and within the solvent, and the formation of attractions between the solute and the solvent. An ideal solution has a null enthalpy of mixing. For a non-ideal solution it is an excess molar quantity.
Convert 62.5 L to mm
3
Answers
Answer:
0.0625
Explanation:
Answer:
62,500
Explanation:
Li and S - covalent or ionic bond?
Answers
Answer:
It is an ionic bond.
Explanation:
Ionic bonds occur when a metal and a nonmetal combine, while covalent bonds occur between two nonmetals. Lithium is a metal and sulfur is a nonmetal.
What might happen if you mixed a strong acid with an equally strong base?
A.You would see an explosive chemical reaction.
B.The acid would destroy the base.
C.The base would destroy the acid.
D.You'd wind up with a pH-neutral salt and water.
Answers
Answer:
D
Explanation:
When you mix a strong acid and a strong base : ( D ) You will wind up with a pH-neutral salt and water
The mixture of a strong base and an equally strong acid results in a neutralization reaction, because at the point of equivalence the base and acid will completely neutralize each other.
The mixture solution will have a pH value of 7 and the end products will an ionic salt and water.
Hence we can conclude that When you mix a strong acid and a strong base , you will wind up with a pH-neutral salt and water.
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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
Answers
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
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
Answers
Answer:
1. anion
2. compund
3. ionic bond
4. polar molecule
5. molecule
6. covalent bond
7. cation
8. metallic bond
Explanation:
what is the electron configuration for lithium
Answers
Answer:
2,1
Explanation:
the electron configuration is 2s1
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
Answers
Write a Formula
Compound Name: Strontium Sulfate
Answers
Answer:
it's SrSO4
Explanation:
can somebody help me with this please
Answers
Answer:
He, 2, 2, 2, 4, 4-2=2, 1, 8
I, 53, 53, 53, 127, 127-53= 74, 5, 7
Explanation:
um check the periodic table for the rest?
Are ionic compounds not carrying a charge?
Answers
Answer:
yes they carry charges
Which gas sample contains the most molecules ?
Answers
Answer:
CO2
Explanation:
(a) CO2; according to Avogadro's Hypothesis, they all contain the same number of particles, therefore, the heaviest molecule, CO2 (molar mass = 44), will have the greatest mass. (b) all the same; at the same temperature all gases have the same kinetic energy.
DNA bases are attached to _____.
sugar molecules
both sugar and phosphate molecules
phosphate molecule
Answers
Answer:
both sugar and phosphate molecules
Answer:
Both sugar and phosphate molecules
Explanation:
A motorcycle starts at rest and moves a distance of 460m .
If it has constant acceleration of 4m55 m/s2 what is its final velocity
Answers
Answer:
The final velocity of the motorcycle is 64.7 m/s
Note: Since the value for the acceleration of the motorcycle is not clear, it is assumed to be 4.55 m/s² in the calculation
Explanation:
Using the equation of motion that contains all the given values in the question: v² = u² + 2as
where v is final velocity; u is initial velocity; a is acceleration; s is horizontal distance
v = ?, u = 0 (since the motorcycle starts from rest), a = 4.55 m/s², s = 460 m
v² = 0² + 2 * 4.55 * 460
v² = 4186
take square root of both sides
v = 64.7 m/s
Therefore, the final velocity of the motorcycle is 64.7 m/s
Based on the figure below, what do the elements of a group (family) have
in common
Answers
Answer:
Explanation:
Send figure below
Colour in acid of red litmus paper
Answers
Red
Litmus paper turn red when it comes in contact with acid. It turn blue if it come in contact with a base. Neutral litmus paper is purple
In the following reaction, how many grams of H2O are produced if 2.00 g of N2H4 react? N2H4 + 3 O2 ---> 2NO2 + 2H2O
Answers
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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. The model shows Earth in several positions relative to the Sun. In which position is it winter in North America?
Answers
The number of elements in one molecule of H2O is
1) 5 elements
2) 5 atoms
3) 2 elements
4) 0 elements
Answers
Answer:
2 elements
Explanation:
There are the two elements that make water
3 way to make bases
Answers
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
Answers
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.
I need help I know it isnt A
