Answers
Answer:
The pointer pointing to the grey and white balls are either proton or nuetron i van't really tell cause their grey and white.
The whole clster of balls is the Nucleus
The black balls on the lines are electrons
And the lines are the energy level
Explanation:
Related Questions
An element in group 3 that is a good conductor of electricity.
Answers
Answer:
Well for me I think
Explanation:
it's Aliminium
Answer:
Aluminum is good in heat and conductor
Which of the following measurements are recorded to three significant figures? Select all that apply.
Select one or more:
a. 0.003 L
b. 140 g
c. 1,610 s
d. 0.0890 m
Answers
Answer:
c) 1610 s
d) 0.0890 m
Explanation:
Significant figures:
The given measurement have four significant figures 1234.
All non-zero digits are consider significant figures like 1, 2, 3, 4, 5, 6, 7, 8, 9.
Leading zeros are not consider as a significant figures. e.g. 0.03 in this number only one significant figure present which is 3.
Zero between the non zero digits are consider significant like 104 consist of three significant figures.
The zeros at the right side when decimal point is present e.g 2400. are also significant. There are four significant figures are present.
a) 0.003 L
This measurement have 1 significant figure which is 3.
b) 140 g
This measurement have 3 significant figure 1, 4. In this measurement 0 is trailing zero that's why it is not consider significant.
c) 1610 s
This measurement have 3 significant figures 1, 6, 1.
d) 0.0890 m
This measurement have 3 significant figures 8,9 and 0
For complete combustion of an organic compound needs 8 molecules of oxygen, what could the formula of this compound be?
Answers
Answer:
C5H12.
Explanation:
The compound will be C5H12.
Now consider the general formula for the combustion of an alkane;
CnH2n+2 + 3n+1/2O2-----> nCO2 + (n+1) H2O
If we substitute n=5, we have;
C5H12 + 8O2-----> 5CO2 + 6H2O
Hence the answer above.
Calculate the percentage composition of a hypothetical compound, X2Y3. The molar mass of X is 4.53 g/mol and the molar mass of Y is 8.71 g/mol. Round both answers to whole numbers.
Answers
Answer:
Explanation: Don't let anyone bring you down you got this you matter, and rock!
Use the drop-down menus after each statement to identify the dry climate region being described.
v climates feature hot summers and cold winters, dividing the climate into sharply contrasting
seasons.
v climates are characterized by very little rainfall, hot summers, and mild winters.
v climates have annual precipitation between 15 and 25 inches.
Semiarid climate regions have areas of grasslands, called
steppes.
Answers
Answer:
✔ semiarid
✔ desert
✔ semiarid
✔ steppes
.
Explanation:
The deserts and steppes comprise the regions that are characterized by dry climates. The dry climates are characterized by very little rainfall, hot summers, and mild winters. The correct option is B.
What is a dry climate?The areas which are very dry and where the water escapes and leaves the area drier than other places is known as the dry climate. Most dry climates have summers very hot, winters cool and warm and the air is very dry.
The main characteristic feature of the dry climate is the low and infrequent rainfall. Arid and semi desert areas have only about 35 cm rainfall per year.
Thus the correct option is B.
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Each electron can be represented by 4 quantum numbers. The two electrons in the outermost level of strontium are designated at 5 s . How many quantum numbers would these two electrons have in common
Answers
Explanation:
They are both in shell 5 and subshell s.
Since s only has 1 orbital, they also have the same orbital number.
But they have different magnetic spins.
Hence 3 out of 4 quantum numbers are in common.
Catalysts, including enzymes, have the role of Select one: a. changing a nonspontaneous chemical reaction to spontaneous. b. lowering the activation energy of a reaction. c. heating up the reactants to make the reaction progress faster. d. changing the pH to a favorable pH for the reaction to progress.
Answers
Answer:
Lowering activation energy of a reaction.
Explanation:
Activation energy is the minimum amount of energy required by the reactants just to be converted to products.
Since catalysts increase the rate of reaction, activation complex is reached in short period of time hence activation energy is lowered.
CH(4)+ 20(2)→ CO2+ 2H(2)O
22.
The reaction shown above is an example of a -
a. synthesis reaction
b. combustion reaction
c. decomposition reaction
d. double displacement reaction
Answers
Answer:
Reaction is a Combustion reaction
The only nonmetal in Group 14 is
A carbon.
B. oxygen.
C. nitrogen.
D. fluorine.
Answers
Answer:
carbon
Explanation:
i just googled it
in an experiment 3.5g of element A reacted with 4.0g of element G to form a compound Calculate the empirical formula for this compound
Answers
Additional information
Relative atomic mass(Ar) : A=7, G=16
The empirical formula : A₂G
Further explanationGiven
3.5g of element A
4.0g of element G
Required
the empirical formula for this compound
Solution
The empirical formula is the smallest comparison of atoms of compound forming elements.
The empirical formula also shows the simplest mole ratio of the constituent elements of the compound
mol of element A :
[tex]\tt mol=\dfrac{mass}{Ar}\\\\mol=\dfrac{3.5}{7}=0.5[/tex]
mol of element G :
[tex]\tt mol=\dfrac{4}{16}=0.25[/tex]
mol ratio A : G = 0.5 : 0.25 = 2 : 1
What is the significance of the color of the light observed in a line spectrum?
Answers
A chipmunk (mass of approximately 1 kg) does push-ups by using a force of 5 N to elevate its center-of-mass by 6 cm in order to do 0.70 Joule of work. If the chipmunk does all this work in 2 seconds, what is its power?
Answers
Answer:
Approximately [tex]0.35\; \rm W[/tex] on average.
Explanation:
There are multiple to find power:
Power [tex]P[/tex] is equal to the product of force [tex]F[/tex] and the speed [tex]v[/tex] at which that force moves the object. That is: [tex]P = F \cdot v[/tex].On the other hand, average power [tex]P[/tex] is also equal to the rate at which work [tex]W[/tex] is done. In other words, average power [tex]P\![/tex] is the average work done in unit time. If work [tex]W\![/tex] is done in time [tex]t[/tex], the average power would be [tex]P = W / t[/tex].The question did not state the speed at which the arm of the chipmunk moves. However, the question did state the work done ([tex]W = 0.70\; \rm J[/tex]) and the time required ([tex]t = 2\; \rm s[/tex]).
Therefore, the equation [tex]P = W / t[/tex] seem to be more suitable.
[tex]\begin{aligned}&P\\ &= \frac{W}{t} \\ &= \frac{0.70\; \rm J}{2\; \rm s} \approx 0.35\; \rm W\end{aligned}[/tex].
Where are chlorofluorocarbons (CFCs) found? Why were they banned?
Answers
Answer:
A gaping hole in the ozone layer over Antarctica was discovered in the mid 1980s. The international community agreed the Montreal Protocol in 1987, which banned most of the offending chemicals.
Hope this helps..Why does soap work to remove oil? (Note that most oils can be considered non-polar. A soap molecule has one end that is polar and one end that is non-polar.)
Answers
Answer:
Soap breaks up the oil into smaller drops, which can mix with the water.
Explanation:
This works because soap is made up of molecules with two different ends.
The soap molecules works as a surfactant for the water oil interphase. The hydrophobic head of the soap molecules trap the oil and dirt ad remove from the surface.
What are surfactants?Surfactants are chemical substances used to reduce the interfacial tension between substance boundary. Soaps and detergents acts as surfactants which are used to remove the dirt and oil from material surface.
Soap has both polar and non-polar characteristics. The alkaline part in the soap causes it to have a polar head, and because of the electric charge on this head, the soap is hydrophilic. A hydrophilic part of soap is drawn to water and will cling to it.
In this instance, the positive-charged hydrogen atoms of the water's hydrogen atoms match with the polar head of the soap molecule. The other part of soap is a fatty acid tail, which is hydrophobic and can bind with the oil and dirt. The trapped oil molecules are then be removed by water.
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What coefficient is needed to balance this equation? ____Fe + 4H2O --> Fe6O4 + 4 H2 *
Answers
Answer:
the answer is 1
the coefficient needed to balance this equation is 1
Explanation:
SOMEONE HELP ME PLEASE I’LL GIVE BRAINLY
Chemical change
physical change
Answers
Answer:
Chemical
Explanation:
can someone help me??
Which action is a result of gravity in relation to moving tectonic plates?
Earth's internal heating
circulating material in the mantle
ridge push and slab pull
Earth's magnetic field reverses
Answers
Answer:
I do K12 and c is correct!
Answer: B. ridge push and slab pull
Explanation: Took the test.
What kind of bond would form between an iron and an oxygen atom: ionic, covalent, or metallic? What kind of bond would form between two silver atoms: ionic, covalent, or metallic? What happens to the valence electrons in this bond? How do ionization energy and electronegativity help explain why this occurs? 3) What kind of bond would form between two chlorine atoms: ionic, covalent, or metallic? What happens to the valence electrons in this bond? How do ionization energy and electronegativity help explain why this occurs?
Answers
Answer:
See explanation
Explanation:
Since iron is a metal and oxygen is a non metal, a bond is formed between the two when electrons are transferred from iron to oxygen. Hence the bond is ionic.
Two silver atoms are held together by metallic bonds. Metallic bond are bond forces that exist between metal atoms in a crystal lattice. The valence electrons in this bond form a cloud. Metals have low ionization energy and low electronegativity hence they loose electrons easily. This accounts for the nature of the metallic bond.
The bond formed between two chlorine atoms is a covalent bond. The valence electrons in this bond are localized between the two chlorine atoms. Chlorine is a nonmetal hence it has a high ionization energy and high electronegativity. Hence it forms covalent bonds in which electrons are shared between bonding atoms.
Which of the following statements is true about single-replacement reactions?
1)They are restricted to metals.
2)They involve a three products.
3)Both the reactants and products consist of an element and a compound.
4)Any metal replaces any other metal.
Answers
Explanation:
i think is, They involve a three products.
The statement which is true about single-replacement reactions are:
3) Both the reactants and products consist of an element and a compound.
Single-replacement reactions :These reactions are also known as single displacement reactions, in this type, the ions of the metals or elements get exchanged with the other element and lead to the formation of a new product.
Example: [tex]2K+2H_2O--- > 2KOH+H_2[/tex]
The ions of water get exchanged with potassium and form a new salt that is potassium hydroxide.
Thus, option 3 is correct.
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10.0 grams of a gas occupies 12.5 liters at a pressure of 42.0 mm Hg. What is the volume when the pressure has increased to 75.0 mm Hg? 6.72 L 7.00 L 22.3 L 0.143 L
Answers
Answer: 7.00 L
Explanation:
Boyle's Law: This law states that pressure is inversely proportional to the volume of the gas at constant temperature and number of moles.
[tex]P\propto \frac{1}{V}[/tex] (At constant temperature and number of moles)
[tex]P_1V_1=P_2V_2[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 42.0 mm Hg
[tex]P_2[/tex] = final pressure of gas = 75.0 mm Hg
[tex]V_1[/tex] = initial volume of gas = 12.5 L
[tex]V_2[/tex] = final volume of gas = ?
[tex]42.0\times 12.5=75.0\times V_2[/tex]
[tex]V_2=7.00L[/tex]
Therefore, the volume when the pressure has increased to 75.0 mm Hg is 7.00 L
Which is most likely to be damaged by an acid? A. A glass jar B. A plastic bottle C. A gold bracelet D. An aluminum can
Answers
Answer:
aluminum can
Explanation:
source: trust me bro im currently working on acid and bases and acid doesnt eat through gold
The object which is most likely to be damaged by an acid is Choice D: An aluminium can.
When an acid undergoes ionization in an aqueous solution, the positively charged ion released is; Hydroxonium ion, H30+.
In essence, the hydrogen ion of an acid can be displaced by the Aluminium ion in the aluminium can.This phenomenon is evident in the arrangement of metals in the electrochemical series.Aluminium is more reactive than the hydrogen ion. As such, an Aluminium can is most likely to be damaged by an acid.
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Find the mass of 7.00 mol of H2O2?
Answers
Answer:
238g
Explanation:
Molar Mass (1 mol) of H2O2 = 34.0147 g/mol
7.00 mol = 35.0147*7
= 238.1029g
= 238g (rounded to 3 sig figs because 3 sig figs in 7,00)
Answer:
answer in picture
Explanation:
During photosynthesis what takes place under the leaf
Answers
Answer:
In plants, the process of photosynthesis takes place in the mesophyll of the leaves, inside the chloroplasts. Chloroplasts contain disc-shaped structures called thylakoids, which contain the pigment chlorophyll.
Explanation: Hope this helps
PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP PLEASE HELP
DETERMINE THE MASS NUMBER OF EACH OF THE ISOTOPES OF LITHIUM
Answers
Answer:
not sure about it .I also need an answer
Do You Know That If you put a Grape in the microwave it will go on Fire!?
Answers
Answer:
really?!?! well did u know oranges can get stale??
___SeCl6+ ____ O2——> ___ seO2 +___Cl2
If you can do this I need help with more
Answers
Answer:
SeCl6 + O2——> seO2 + 3Cl2
I can be found in the 4th period on the periodic table.
Vanadium (V)
Zirconium (Zr)
Carbon (C)
Beryllium (Be)
Answers
Vanadium (V)
Vanadium is the only one in the 4th period here so
13. Sodium, Na, shows metallic properties. Identify another element that is likely to show similar metallic properties.
Answers
Answer:
19.K, potassium
Explanation:
it has all properties of metals
hhelp will give brainliest
Answers
Answer: pretty sure it is D
Answer:
its the last one
Explanation:
HELP ASAP
1. Where are hurricanes most likely to form?
a Over warm tropical waters
b Over frozen Arctic Waters
c Over a tropical rainforest
d Over cool Atlantic Waters
Answers
Answer:
Hurricanes are the most violent storms on Earth. They form near the equator over warm ocean waters. Actually, the term hurricane is used only for the large storms that form over the Atlantic Ocean or eastern Pacific Ocean. The generic, scientific term for these storms, wherever they occur, is tropical cyclone.
im going to guess the answer is A, sorry if im wrong.
hope this helps.