True or False gases have indefinite shapes because gas molecules are constantly
changing their positions.
Answer:
True
Explanation:
Gases don't have any shape or form, so they could not be definite.
The area of a rectangle can be found by multiplying its length by its width. What is the area of a rectangle that is 5.6 cm in length and 9.24 cm wide?
Report your answer with the correct number of significant figures.
Answer:
Area = 51.74cm ²
Explanation:
5.6 × 9.4 = 51.744
Round above answer
= 51.74
which statement about the earth atmosphere is true
A.recent incease in carbon dioxide levels can contribute to a long--term cooling of eath's climate. B.a recent decrease in carbon dioxide levels will incease plant growth on eath.c.in the past few decades,carbon level has been rising.D.in the past few decades,carbon level has been falling
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What volume of concentrated nitric acid (15.8 M) is needed to prepare 4.0 L of a 2.0 M solution?
aluminum reacts with 42g of iron(ii) sulfate. How many grams of iron are formed?
Answer:
15.44 gm
Explanation:
Hope it is helpful....
Is adding manganese dioxide to hydrogen peroxide, a chemical or physical change?
Answer: chemical change as a new product is formed
I need help with this question ASAP this should have 2 answers
Answer:
The correct answer is B. and C. according to me!
Answer:
A. and C.
no explanation...
can someone help me pls
Answer:
The heat would flow from the hot solid to the cool solid until all temperatures are near equal.
what information is needed to determine the amount of moles in 1.6g of HCL?
Answer:
Molar mass and Mass
Explanation:
The relationship between mass and number of moles is given as;
Number of moles = Mass / Molar mass
Mass = 1.6 g
Molar mass of HCl = ( 1 + 35.5 ) = 36.5 g/mol
Number of moles = 1.6 g / 36.5 g/mol
Number of moles = 0.0438 mol
Atmosphere pressure is about 100000 Pa. Calculate the force of the Atmosphere on a person whose Surface area is 2.0m
Answer:
The force of the atmosphere 200 KN.
Explanation:
Pressure is the ratio of force applied to the area to which the force is applied.
i.e Pressure = [tex]\frac{Force}{Area}[/tex]
But, Pressure = 100000 pa (100000 N/ [tex]m^{2}[/tex]), and surface area = 2.0 [tex]m^{2}[/tex]
Thus,
100000 = [tex]\frac{Force}{2.0}[/tex]
⇒ Force = 100000 x 2.0
= 200000
Force = 200 KN
The force of the atmosphere 200 KN.
Help, please I’m very confused
Answer:
chemical is fire
and ductility is physical
Explanation:
give me brainliest please
What happens when Na forms an ionic bond?
O it gains one electron and becomes a -1 anion
it loses one electron and becomes a +1 cation
It loses 2 electrons and becomes a + 2 cation
It shares electrons with the other atom in the bond
Look at picture
ASAP please will mark as brainlist don’t got much time
Answer:
in this also 1st option is correct because na is also a metal and metal gains electron...
The equation shows the reaction between magnesium and chlorine to produce magnesium chloride.
Mg + Cl2 → MgCl2
Magnesium chloride consists of Mg2+ and Cl− ions.
Describe, in terms of electrons, how magnesium chloride is produced from magnesium and chlorine.
Answer: Mg is a cation and Cl is an anion
Explanation: In more detail, if you look at the periodic table, the group number (or columns) of the elements, describe how many valence electrons, or how many electrons the element has available to have a complete an electron shell. Magnesium being in group 2, it has one 2 electrons that will be "donated" to an anion that it bonds with. However, Chlorine being in group 17, (look at the single digit number for double digit groups), it has 7 valence electrons. Knowing that a full electron shell is usually 8 electrons, it needs only one. Since Magnesium has 2 valence electrons to give away, two atoms of Chlorine gas will then bind to the Magnesium, where the 2 Chlorine atoms will take the electrons to fill their shells. Magnesium Chloride, in terms of charges when in ions, [Mg]2+ and 2 [Cl]-1
Magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.
How is magnesium chloride formed from magnesium and chlorine?Magnesium chloride is an ionic compound which consists of magnesium ions and chloride ions.
A Magnesium atom forms ion by giving up two electronsTwo Chlorine atoms become ions by accepting one electron each.The oppositely-charged ions are attracted to each other.Therefore, magnesium chloride is formed when magnesium ion formed from the loss of two electrons and two chloride ions formed by accepting one electron each are held together by electrostatic attractive forces.
Learn more about ionic compound at: https://brainly.com/question/13690700
Which of these characteristics will produce the most water dense water
Answer:
High salinity, low temperature.
Explanation:
A lot of salt is left behind. This leads to water with very high salinity
The salinity of the water increases as more salt is dissolved in it. High temperature, density and salinity produce the most dense water.
What is salinity of water ?Salinity influences the physical properties of water, such as density and heat capacity, together with temperature and pressure.
When two water samples of the same volume are compared, the water sample with the higher salinity will have more mass and be more dense.
The ocean's salinity is raised by both sea ice production and ocean water evaporation. However, processes that reduce salinity, such as the ongoing inflow of fresh water from rivers, precipitation of rain and snow, and melting of ice, constantly balance out these "salinity rising" causes.
Thus, salinity ,density and high temperature produce the water dense.
To learn more about salinity of water refer the link below;
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i need help with this asap pls help if you can. pls, don't take the points if you don't know.
hope this is correct / it helps
If 220 grams of C3H8 react with 20 grams of O2, how much CO2 can be formed?
Answer:
Explanation:
Which is one factor that describes a Mediterranean climate?
has many trees
is found in inland areas
has cool and rainy winters
has little to no precipitation
PLEASE I WILL MARK BRAILIEST AND GIVE 30 PTS
Answer:
dry
polar
highlands
temperate marine
temperate continental
Explanation:
what must happen first before a change of state can occur (change in mass, change in position, change in volume, or change in energy)
Answer:
Change in energy.
Explanation:
An energy change is required to shift one state to another or do any of the other listed.
name the following compound Hg2S
A balloon occupies 1.50 L with 0.205 mol of carbon dioxide. How many moles would be required to increase the size of the balloon to 5 L?
Answer:
0.683 moles of the gas are required
Explanation:
Avogadro's law relates the moles of a gas with its volume. The volume of a gas is directely proportional to its moles when temperature and pressure of the gas remains constant. The law is:
V₁n₂ = V₂n₁
Where V is volume and n are moles of 1, initial state and 2, final state of the gas.
Computing the values of the problem:
1.50Ln₂ = 5L*0.205mol
n₂ = 0.683 moles of the gas are required
what is the reactant of 2Fe2O3 = 4Fe + 3O2
It depends on the direction of the arrow.
If the arrow goes like this ---> the reactant would be 2Fe2O3
If the arrow goes like this <--- the reactants would be 4Fe + 3O2
What eventually happens to all the energy in a food web? The energy in a food web finally??????
Answer:
All of the consumers and producers eventually become nourishment for the decomposers.
Explanation:
Energy is transferred between organisms in food webs from producers to consumers. The energy is used by organisms to carry out complex tasks. The vast majority of energy that exists in food webs originates from the sun and is converted (transformed) into chemical energy by the process of photosynthesis in plants.
20 A student draws the model shown below.
Sun
Earth
Which of these best compares the conditions at Location X and Location Y?
F It is day at Location X and night at Location Y.
GIt is winter at Location X and summer at Location Y.
H There are more hours of daylight at Location X than at Location Y.
1 The moon is brighter when viewed from Location X than when viewed from Location Y.
Answer:
There are more hours of daylight at Location X than at Location Y.
Explanation:
The student has created a model in the diagram in which sun and earth are presented. There are two point location on earth one is x and other is y. The x point is declined towards the sun which means that locations on point x receives more light than location Y. There will be more hours of daylight at Location x.
The best comparison of the conditions at Location X and Location Y is there are more hours of daylight at Location X than at Location Y.
What is the Sun and the Earth?The sun is the big spherical of heat and energy. The sun gives light. The Earth is the third planet of our solar system.
Thus, the correct option is C, There are more hours of daylight at Location X than at Location Y.
Learn more about Sun and the Earth
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what events are typically earthquakes near large bodies of water
Answer:
tsunamis
they are literally water earthquakes that force tons of water ashore and wipes out cities and towns
C3H8 +502 + 3CO2 + 4H2O
How many grams of CO2 will be produced from 7.00 g of C3H8 and 98.0 g of O2?
Answer:
Explanation:
first, you calculate the amount of O2 in moles:
98.0 ÷ 32 = 3.0625
second, the ratio if O2/C3H8 is 5 so you need to calculate O2 in moles with that:
3.0625 ÷ 5 = 0.6125
third, the amount of CO2 in moles also can be calculate by the ratio of C3H8/CO2 which is 3
0.6125 × 3 = 1.8375
then multiply CO2 in moles by its molar mass which is 44 g/mol
1.8375 × 44 = 80.85g
Why is light helpful? You can just give one reason
Answer:
to give off positive vibes <3
Explanation:
Imperial shrimp attach themselves to sea cucumbers for transportation. The interaction saves energy and improves food availability for the shrimp. The sea cucumber is not affected by the interaction. What type of interaction exists between the shrimp and the sea cucumber?
commensalism
competition
mutualism
parasitism
please help
Answer:
a
Explanation:
commensalism
What is the formula for manganese (IV) bromide?
Answer:
MnO₂
Explanation:
What is an ion atom?
Calcium and Gold (III) Bromide react. Will this reaction proceed?
If it does proceed, write the balanced chemical equation below.