Answer: C
Explanation:
What do the craters on the moon’s surface tell us about its past?
There may be alien life on the moon.
The moon’s surface has been struck with other objects.
There are volcanoes on the moon.
Mountains formed on the moon.
Answer:
The moon's surface has been struck with other objects.
Explanation:
Answer 1 - Craters are not a sign of alien life as there is nothing directly showing the crater's are not natural phenomena.
Answer 2 - Craters are (normally) produced by the impact force of a foreign object that is moving quickly and collides with an object of larger size.
Answer 3 - Volcanos form mountains and magma tubes, not craters.
Answer 4 - The formation of mountains does not relate to craters in any meaningful way.
Answer: The moon’s surface has been struck with other objects.
Explanation: because those crates were caused by drifting objects such as asteroid's and meteorite's that caused craters in the moon.
the answer is D
PLEASE HELP
If you have 1 mole of H₂O how many moles of H2O you have?
Answer:
2 molecules of hydrogen and 1 molecule of oxygen
Explanation:
The question is unclear, but if you are asking how many molecules are in one molecule of water, it is the answer provided above.
How much heat must be removed from 456 g of water at 25. 0 c to hcange it into ice at 10 c
The heat required to convert water is given as the product of the mas and the latent heat. 28.34 kJ heat must be removed from the water to change it into ice.
What is heat energy?Heat energy is the product of mass, specific heat capacity, and temperature change. It is given as,
[tex]\rm Q = mc \Delta T[/tex]
Given,
Mass of water = 456 gm
Specific heat capacity = 4.186 J / g K
Temperatutre change = 14.85 K
Substituting values above:
[tex]\begin{aligned} \rm Q &= 456 \times 4.186 \times 14.85\\\\&= 28345.91\;\rm J\\\\&= 28.34\;\rm kJ\end{aligned}[/tex]
Therefore, 28.34 kJ of heat energy should be removed from the water.
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A student heated some copper(II) carbonate using this apparatus:
metal
carbonate
limewater
HEAT
(a) Describe and explain what would happen to the limewater (2)
(b) Write a balanced chemical equation, including state symbols,
for the reaction that occurs when copper (II) carbonate is
heated.
Answer:
Below.
Explanation:
a) When limewater is heated it gives off carbon dioxide gas and leaves calcium oxide( CaO).
CaCO3 ----> CaO + CO2
b) When copper II carbonate is heated the equation is:
CuCO3 ---> CuO + CO2.
(4.5x10x10x10x10x10)÷(300)
Answer:
Explanation:
4.5x10x10x10x10x10 can be written as 4.5^5, by the way.
The sum of 4.5^5 is 450,000.
450,000 divided by 300 is 1500.
Hope this helps!
Explanation:
4.5×10×10×10×+0×10=4500000
450000÷300
remove zeros
4500÷3
=1500
Helppppppppppppppppp
Answer:
I think it's B
Explanation:
Brainlest po
Maybe i been learn this before
Vote Bbm and sara on election for the win.
20. What is the name of the compound?
0 3,1 diethylcyclopentane
O 1, 3 dimethylcyclopentane
0 1,3 diethylcyclopentane
O 3,1 dimethylcyclopentane
Answer:
There is no compund in the question...could you provide it please?
Question: What is the specific heat of iron if 985 J of energy is required to raise the temperature of 158.5 g from 10.0°C to 24.0°C?
I will give brainliest please help
Answer: 0.065
Explanation:
If the collected information showed that the temperature was 10°C and the wind speed was 75 mph, what type of weather would it
probably be outside?
OA. cold and wet
OB. cold and windy
OC. warm and windy
OD. warm and sunny
Answer:
cold and windy
Explanation:
if its 10 degrees outside then it must be cold. then 75 mph that is very windy
microwave ovens are in almost every home in America. Where would this sentence fit in the vent diagram?
Answer:
Option D
Explanation:
Discovering microwaves would be pure science. Using them in a constructive way would be applied science.
Nitrogen fixing bacteria are important to all ecosystems because:
Nitrogen fixing bacteria are important to all ecosystems because they make use of atmospheric nitrogen into biological nitrogen.
Which is nitrogen fixing bacteria?The bacteria Azotobacter, Bacillus, Clostridium, and Klebsiella are examples of this class of nitrogen-fixing bacterium.
Many heterotrophic bacteria survive in soil and fix large amounts of nitrogen without interacting with other organisms.
Amino and nucleic acids (including DNA) and proteins, for example, require nitrogen molecules. Using nitrogen-fixing plants such as pulse or clover in agriculture increases the nitrogen content in the fields and consequently the soil fertility.Hence they are important because they convert the atmospheric nitrogen for the biological use.
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a real gas is one that
Answer:
A real gas is one that deviates from ideal behavior.
Explanation:
This is due to the effects of gas particles occupying a finite volume.
Na2co3 + ca(no3)2 --> 2nano3 + caco3 if the problem tells you that you have 45 g of sodium carbonate and 35 g of calcium nitrate, a) which is the limiting reagent and b) what is the theoretical amount of calcium carbonate that will precipitate?
Calcium nitrate is the limiting reagent and theoretical yield of calcium carbonate is 21.3 grams.
What is the relation between mass & moles?Relation between the mass and moles of any substance will be represented as:
n = W/M, whereW = given massM = molar massMoles of Na₂CO₃ = 45g / 105.98g/mol = 0.424 mol
Moles of Ca(NO₃)₂ = 35g / 164g/mol = 0.213 mol
From the stoichiometry of the reaction it is clear that:
1 mole of Na₂CO₃ = reacts with 1 mole of Ca(NO₃)₂0.424 mole of Na₂CO₃ = reacts with 0.424 mole of Ca(NO₃)₂It means Ca(NO₃)₂ is the limiting reagents as less moles of this is present in the reaction, so the formation of product is depends on the amount of Ca(NO₃)₂.
Again from the stoichiometry of the reaction, it is clear that:
1 mole of Ca(NO₃)₂ = produces 1 mole of CaCO₃0.213 mole of Ca(NO₃)₂ = produces 0.213 mole of CaCO₃Theoretical mass of CaCO₃ = (0.213mol)(100g/mol) = 21.3g
Hence, required mass of calcium carbonate is 21.3g.
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what is the balanced equation for the production of water?
Answer:
H₂ + O₂ → H₂O
Now, check that oxygen has two atoms on the left and one on the right
so, you put 2 on the right side
H₂ + O₂ → 2H₂O
oxygen is balanced so, add 2 on H₂ to balance out hydrogen
THE FINAL BALANCED EQUATION:
2H₂ + O₂ → 2H₂OPlease help
a solution of potassium hydroxide (koh) was titrated against a solution of hydrochloric acid. how
many moles of potassium hydroxide would react with 1 mole of hydrochloric acid? (hint: it may help
to write out a balanced symbol equation for the reaction.)
The number of moles of potassium hydroxide that would react with 1 mole of hydrochloric acid will be 1.
Stoichiometric RatioFrom the balanced equation of the reaction as shown below:
[tex]KOH + HCl --- > KCl + H_2O[/tex]
One would see that the stoichiometric mole ratio of [tex]KOH[/tex] to that of [tex]HCl[/tex] is 1:1.
This means that 1 mole of KOH will require 1 mole of HCl for a complete reaction that obeys the law of conservation.
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Which object has the greater impact on the tides
The sun
The moon
Jupiter
Mountain ranges
which sequence represents increasing levels of organization in the human body
Answer:
It is convenient to consider the structures of the body in terms of fundamental levels of organization that increase in complexity: subatomic particles, atoms, molecules, organelles, cells, tissues, organs, organ systems, organisms and biosphere
Explanation:
i hope it help you
The ka of acetic acid (hc2h3o2) is 1. 8 × 10-5. What is the ph at 25. 0 °c of an aqueous solution that is 0. 100 m in acetic acid?
The pH at 25.0 °c of an aqueous solution that is 0. 100 m in acetic acid is 5.744.
What is ka expression?
The acid dissociation constant is the equilibrium constant of an acid's dissociation reaction.
The ka is given [tex]1. 8 \times 10^-^5[/tex]
From the equation pf ka for weak acid
[tex]\rm H^+ = \sqrt{Ka \times C}[/tex]
Putting the values in the equation
[tex]\rm H^+ = \sqrt{ 1. 8 \times 10^-^5 \times 0.100 } = 0.0000018[/tex]
Now, the [tex]\rm pH = -log[H^+][/tex]
[tex]\rm pH = -log[0.0000018] = 5.744[/tex]
Thus, the pH of acetic acid is 5.744
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present the cell in which the following reaction place
Mg(s) + 2Ag+ (0.0001 M) ----> Mg2+ (0.130M) + 2Ag(s)
calculate its E if E∅ is 3.17 V
[tex]\Huge{\green}\fcolorbox{blue}{cyan}{\bf{\underline{\red{\color{red}Answer}}}}[/tex]
2.96V
Explanation:
[tex] \sf Mg(s) + 2 {Ag}^{ + } (0.0001M) \longrightarrow {Mg}^{2 + } (0.130M) + 2Ag(s) \\ \\ \sf E{ \degree} = 3.17V[/tex]
As per the Nerest equation
[tex] \sf E_{cell} = E_{cell}{ \degree} - \frac{2.303RT}{nF} log \frac{ [M]}{ [{M}^{n + }] } \\ \\ \sf E_{cell} = E_{cell}{ \degree} - \frac{0.0592}{n} log \frac{[M]}{[ {M}^{n + } ]} [/tex]
Here n = 2
at the n depicts the number of electrons
M = Mg as it is neutral after the product
while M+ = Ag2+ as it is positively charge after the product
[tex] \implies \sf E =3.17 - \frac{0.0592}{2} log \frac{[Mg]}{ {[{Ag}^{ + }]}^{2} } \\ \\ \sf \implies E = 3.17 - 0.0292 log[ \frac{0.130}{ {10}^{ - 8} } ] \\ \\ \sf \implies E = 3.17 - 0.0292 log[130 \times {10}^{5} ] \\ \\ \sf \implies E = 3.17 - 0.0292 \times 7.11 \\ \\ \sf \implies E = 3.17 - 0.2076 \\ \\ \sf \boxed {\pink \implies \pink{E = 2.96V}}[/tex]
In the balanced molecular equation for the neutralization of sodium hydroxide with sulfuric acid, the products are:
The balanced molecular equation for the neutralization of sodium hydroxide with sulfuric acid is:
Sodium hydroxide + Sulfuric acid → Sodium sulfate +water
What is the balanced molecular equation?A balanced equation is an equation for a chemical reaction in which the number of atoms for each element in the reaction and the total charge is the same for both the reactants and the products. In other words, the mass and the charge are balanced on both sides of the reaction.
In the given reaction, the reactants have been sulfuric acid and sodium hydroxide. Thus, these are written on the left side of the right arrow. The sodium sulfate and water have been the products and written on the right side of the right arrow.
The balanced molecular equation for the neutralization of sodium hydroxide with sulfuric acid is:
Sodium hydroxide + Sulfuric acid → Sodium sulfate +water
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Describe each type of reaction that can take place and explain the factors that affect reaction rates.
There are 2 different questions above...
Answer(s):
synthesis, decomposition, combustion, single replacement, and double replacement.the physical state of the reactants, and surface area, temperature, and the presence of a catalyst are the four main factors that affect reaction rate.::: (\_(\ Hope
*: (=' :') this
•.. (,('')('') helped :)
Ammonia (nh3) chemically reacts with oxygen gas to produce nitric oxide and water. What mass of nitric oxide is produced by the reactin 6. 40 g
Ammonia yields nitric oxide and water in the presence of oxygen. The mass of nitric acid that will be produced from 6.40 gm of oxygen is 4.8 grams.
What is mass?Mass is the product of the moles of the substance and its molar mass. it is given as,
[tex]\rm mass = moles \times molar\; mass[/tex]
The balanced chemical reaction is shown as:
[tex]\rm 4NH_{3} + 5O_{2} \rightarrow 4NO + 6H_{2}O[/tex]
Moles of oxygen are calculated by mass, 6.40 gm as,
[tex]\begin{aligned} \rm moles &= \rm \dfrac{mass}{molar\; mass}\\\\&= \dfrac{6.40}{32}\\\\&= 0.2\;\rm moles \end{aligned}[/tex]
From the reaction, the molar ratio of nitric oxide to oxygen is 4: 5 and is used to calculate the moles of nitric oxide as,
[tex]0.2 \times \dfrac{4}{5} = 0.16[/tex]
0.16 moles and molar mass, 30 of nitric oxide is used to calculate the mass as,
[tex]0.16 \times 30 = 4.8 \;\rm gm[/tex]
Therefore, 4.8 grams of nitric oxide will be produced.
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A 1. 0 l solution of agno3 and pb(no3)2 has a ag concentration of 0. 20
With an Ag concentration of 0.020 M and a Pb2+ concentration of 0.0010 M, Only PbSO₄(s) will precipitate. The correct option is C.
What is molarity?Molarity is the measure of the concentration of any solute in per unit volume of the solution.
The equations are
[tex]\rm Ag_2SO_4--- > 2Ag++SO4^{-2}[/tex]
[tex]PbSO_4--- > Pb_2+ +SO4^{-2}[/tex]
Therefore:
[tex]Ag_2SO_4=[0.02^2[0.001]]\\Ag_2SO_4=4 \times 10^{-7}[/tex]
and
[tex]PbSO_4=[0.001^2[0.001]]\\PbSO_4=4*10^{-6}[/tex]
Since, [tex]PbSO_4 > > PAg_2SO_4[/tex], only PbSO₄ will precipitate.
Thus, the correct option is (C) Only PbSO₄(s) will precipitate.
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During which event is more energy produced compared to other days to turn a turbine? el niño a tsunami during a spring tide during a low tide
A spring tide represents a natural process where more energy is produced when compared to other days in order to turn a turbine.
What do renewable energies mean?A renewable energy can be defined as any source of energy that is reversibly obtained from the nature.
A spring tide can be considered a powerful renewable source capable of generating electricity.In conclusion, a spring tide represents a natural process where more energy is produced compared to other days in order to turn a turbine.
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Answer:
C. during a spring tide
Explanation:
:D
A solution containing hcl would likely have a high ph and a low poh. a low ph and a high poh. a high ph and a high poh. a low ph and a low poh.
The solution has high pH and low pOH when the HCl is present in that solution because of the acidic nature of HCl.
What is the pH of solution containing HCl?A solution containing hcl would likely have a high ph and a low poh because HCl is an acid. We know that acidic solution has high pH and low pOH. So we can conclude that the solution has high pH and low pOH when the HCl is present in that solution because of the acidic nature of HCl.Learn more about pH here: https://brainly.com/question/172153 #SPJ4
Answer:
B. a low pH and a high pOH.
Explanation:
Correct on Edge 2022!!!
Good luck everyone, you got this! Have a great day!
how is the water in the swimming pool similar to earth's interior? How is it different?
Explanation:
Water is a liquid, it is same as the oceans water, but, swimming pool water contains Flourine (F) or Chlorine (CI) to clean it up, scinece there is no way that the water moves.
Ocean water tends to be a bit more alkaline than freshwater. what could happen if an ocean absorbs a lot of co2 from the atmosphere?
Answer:
However, carbon dioxide dissolved into the ocean causes seawater to acidify, threatening the ability of shellfish and corals to build their skeletons and affecting the health of other fish and marine species—many that are important to coastal economies and food security.
Explanation:
19. A precipitate is expected when an aqueous solution of potassium iodide is added to an aqueous solution of a. Calcium nitrat
The reaction of potassium iodide with silver nitrate results in the formation of silver iodide as a precipitate.
What is a precipitate?A precipitate is given as the solid deposition in the solution. It is formed as the product in the chemical reaction with the insolubility in the solution.
The reaction of KI with silver nitrate results in the formation of soluble potassium nitrate and insoluble silver iodide, which forms as the precipitate.
Thus, the reaction of potassium iodide with silver nitrate results in the formation of silver iodide as a precipitate.
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Help with chem
please write the formula for
nickel(IV) sulfite.
When butane burns in an excess of oxygen, the principal products are:.
Answer:
Carbon dioxide and water
Explanation:
All hydrocarbons, when burned in excess of oxygen produces carbon dioxide and water [along with the unused oxygen].
The equation for the combustion of butane is:
C₄H₁₀ + 6.5O₂ → 4CO₂ + 5H₂O
