Answers
Answer: True
Explanation:
Venus is the hottest planet in the solar system. Mercury is still hot but half of it is also cold due to the sun not directly pointing at it.
Answer:
true
Explanation:
Related Questions
- Wind and water sometimes carry
topsoil from one place to another. A
word that describes this process is?
A Substratum
B> Flow
Erosion
D Decay
Answers
Answer:
erosion is the right answer
Is the fractional distillation of liquefied air a physical or chemical change?
Answers
Answer:
Physical Chanhe is the answer : )
the reaction 2F2+ 2H2O + 4HF + 02 find the number of moles of oxygen produced from 10 moles of fluorine
Answers
Answer:
20 moles of Oxygen
Explanation:
2F2 + 2H20 -> 4HF + O2
We have 10 moles of fluorine. Based on the reaction equation, we see that:
n O2 = 2 * n F2 (n is the number of moles)
=> n O2 = 2 * 10 = 20 (moles)
Because of this, the number of moles of oxygen is 20 moles.
HELP WITH THIS WORD PROBLEMStudents want to gather evidence for the claim that the number of atoms present before a chemical reaction is equal to the number of atoms present after the chemical reaction. They decide to react vinegar and baking soda in a sealed plastic bag. Which of the following would provide the evidence the students need?
The mass of the plastic bag, baking soda, and vinegar before the reaction was equal to the mass after the reaction.
Bubbles were produced during the reaction, which meant that a gas was being produced
.The plastic bag did not change in any way, indicating that it was not involved in the reaction.
The mass of the baking soda was exactly equal to the mass of the vinegar used to create the chemical reaction.
Answers
Conservation of atoms is just conservation of mass.
Calculate the molarity of a solution containing 21.9g of MgCl, in enough water to
make a 750.mL solution.
Answers
21.9 g / 95.211 g/mol = 0.230 mol MgCl
Then divide by L of water to get the molarity.
0.230 mol / 0.750 L = 0.307 M MgCl
In a warehouse, the workers sometimes slide boxes along the floor to move them. Two boxes were sliding toward each other and crashed. The crash caused both boxes to change speed. Based on the information in the diagram, which statement is correct? In your answer, explain what the forces were like and why the boxes changed speed.
Box 1 has more mass than Box 2.
Box 1 and Box 2 are the same mass.
Box 1 has less mass than Box 2.
Answers
Answer:
Box 1 and Box 2 are the same mass.
Explanation:
Because they both change speed due to having the same mass!
Hope this helps! :) BRAINLIEST PLZ
Help please
what is the half-life of c-14 at 250g?
Answers
Answer:
5,730 years
hope im right
Explanation:
Its half-life is 5,730 years. How much of a 250g sample of carbon-14 will be left in 5,000 years?
Select all of the answers that apply.
multiple selection answer
Surface currents are driven by _____.
salinity
density
wind
temperature
the moon
Answers
[tex]\mathfrak{\huge{\orange{\underline{\underline{AnSwEr:-}}}}}[/tex]
Actually Welcome to the Concept of the Geography.
Surface currents in a ocean or a sea are driven by Winds.
Answer:
winds :)
Explanation:
please help! Question is on the bottom
Answers
Give me lil reasoning so I know your not lying for points
:(
(I’ll mark you as brainlister )
Answers
Answer:
C
Explanation:
An inverse relationship means that as one increases the other decreases. From the negative slope of this graph, you can tell that as volume increases, pressure decreases. If you look at the data point for 20 on the volume axis, it matches up with about 240 on the pressure axis.
A closed gas system initially has pressure and volume of 0.922 atm and 4.64L with the temperature unknown. If the same closed system has values of 1030 torr, 4.36 L, and 837K, what was the initial temperature in K?
Answers
Answer:
606.09K
Explanation:
Using the combined gas law equation;
P1V1/T1 = P2V2/T2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (L)
V2 = final volume (L)
T1 = initial temperature (K)
T2 = final temperature (K)
According to the provided information in the question;
P1 = 0.922atm
P2 = 1030torr = 1.355atm
V1 = 4.64L
V2 = 4.36L
T1 = ?
T2 = 837K
Using P1V1/T1 = P2V2/T2
0.922 × 4.64/T1 = 1.355 × 4.36/837
4.278/T1 = 5.9078/837
Cross multiply
5.9078T1 = 837 × 4.278
5.9078T1 = 3580.69
T1 = 3580.69/5.9078
T1 = 606.09K
please help!! will give brainliest if u tell me how
Why does heat transfer from object to object?
Select one:
a.Heat transfers because of the temperature differences between objects
b.Heat transfers because of the mass difference between objects
c.Heat does not transfer between objects
d.Heat is energy so it moves
Answers
How many atoms in this molecule have a tetrahedral molecular geometry?
Answers
In the given molecular geometry, two atoms (C and O) have a tetrahedral molecular geometry.
What is tetrahedral geometry?The tetrahedral geometry is formed when there are four bonds all on one central atom. According to the VSEPR theory, the bond angles between the bonds are 109.5°.
Methane has tetrahedral geometry and the four equivalent bonds in 3 D corresponding to the four corners of a tetrahedron centered on the carbon atom.
In the given molecule, the carbon is attached to three hydrogens and one carbon atom with bond angles of 109.5° have a tetrahedral geometry and shape.
The oxygen atom is attached to two carbon atoms with bond angles of approximately 104.5° and contains two lone pairs. The oxygen atom has a tetrahedral molecular geometry. The oxygen atom is of the form AX₂E₂ and has bent shapes similar to the shape of water.
Learn more about tetrahedral geometry, here:
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Two atoms (C and O) in the specified molecular geometry have a tetrahedral molecular geometry.
When four bonds are present on the same core atom, the tetrahedral geometry is created. The bond angles between the bonds are 109.5° in accordance with the VSEPR hypothesis.
The four analogous bonds in three dimensions that make up methane correspond to the four corners of a tetrahedron that is centred on the carbon atom. Methane has a tetrahedral shape.
One carbon atom with a bond angle of 109.5° and a tetrahedral geometry makes up the carbon in the given molecule, which is joined to three hydrogen atoms.
Thus, with bond angles of roughly 104.5° and two lone pairs, the oxygen atom is joined to two carbon atoms. Tetrahedral molecular geometry characterises the oxygen atom.
For more details regarding molecular geometry, visit:
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HELPPPP!!!!
Four students were asked to identify the part of an atom that determines the atom's identity and chemical properties. The student's responses are shown in the chart below. Which of the student's responses is correct?
Answers
Answer:
The number of protons is what determines a atoms identity.
This means that student 3 is correct.
Explanation:
which image of earth is more recent?
Answers
Answer:
b
Explanation:
Answer:
2
Explanation:
its has more space now cause of The to contemplates
A teacher tells the student to dlaw the same wave with double the frequency, while keeping the amplitude the same. How would the student draw the new wave?
Answers
Answer:
A.
Explanation:
Frequency is how often one complete cycle or wave takes place. Amplitude is the height of the wave from the midpoint to the crest.
The new drawing should have twice as many waves in the same period of time, with the same height wave.
Answer:
A.)
Explanation:
Frequency is how often one complete cycle or wave takes place. Amplitude is the height of the wave from the midpoint to the crest.
The new drawing should have twice as many waves in the same period of time, with the same height wave.
2 NH3(g) → N2(g) + 3 H2(g)
What type of reaction is shown above?
A)
single replacement
B)
decomposition
C)
double replacement
D)
synthesis
Answers
Answer is B.
AB —-> A + B
Answer:
Decomposition Reaction
Explanation:
In the provided reaction, we can see that Ammonia is getting decomposed into Nitrogen and Hydrogen gas.
Another way to think about it is that Decomposition is nothing but one thing giving rise to 2 or more than 2 things.
Since our Ammonia is giving rise to 2 gases, this reaction is an example of Decomposition reaction
We need a 3.0M aqueous HCl solution to dissolve the middle of a penny which is made of nickel. What mass of HCl is contained in 2.40 L of a 3.0M solution?
Answers
Answer:
262.8 g
Explanation:
Molarity = 3.0M
Mass = ?
Volume = 2.40L
The relationship between these quantities is given as;
Molarity = Number of moles / Volume
Number of moles = Molarity * Volume
Number of moles = 3 * 2.4 = 7.2 mol
Mass = Number of moles * Molar mass
Molar mass of HCl = 1 + 35.5 = 36.5 g/mol
Mass = 7.2 * 36.5 = 262.8 g
Answer:
262.44 grams of HCl is contained in 2.40 L of a 3.0 M solution.
Explanation:
Molarity (M) or Molar Concentration is the number of moles of solute that are dissolved in a certain volume.
Molarity is calculated as the number of moles divided by the volume of the solution:
[tex]Molarity=\frac{number of moles of solute}{volume of solution}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
In this case:
Molarity= 3 MNumber of moles of solute= ?Volume of solution= 2.4 LReplacing:
[tex]3 M=\frac{number of moles of solute}{2.40 L}[/tex]
and solving you get:
number of moles of solute= 3 M* 2.40 L
number of moles of solute= 7.2 moles
Being the molar mass of HCl 36.45 g/mole, then you can apply the following rule of three: if 1 mole has 36.45 grams, 7.2 moles how much mass does it have?
[tex]mass of HCl=\frac{7.2 moles*36.45 grams}{1 mole}[/tex]
mass of HCl= 262.44 grams
262.44 grams of HCl is contained in 2.40 L of a 3.0 M solution.
How many protons are in an oxygen atom.
Answers
Answer:
Hello
there are 8 protons in oxygen atom
Explanation:
thanks...hope it helps
answer pls ill give brainly
How is energy from the sun used as food energy by organisms in an ecosystem?
Energy from the sun is absorbed as heat by consumers.
Energy from the sun is absorbed by fungi, and it is then passed on to consumers.
Energy from the sun is converted into food energy by producers, which is then passed on to consumers.
Energy from the sun is converted into food by consumers, which is then passed on to producers.
Answers
Answer:
its absorbed by heat from consumers
The calorimeter pictured below shows the final temperature after calcium chloride was added to water. (The initial temperature was 25°C.) Which of the following best describes what occurred within the calorimeter?
A. Only Bond forming occurred
B. The bonds that formed were the most part stronger than the bonds that were broken
C. More energy was absorbed in breaking bonds than was released when new bonds form
D. As the powder dissolved, the breaking of bonds released energy
Answers
Answer:
The answer is acctualy B
Explanation:
I did the gizmo
The calorimeter has the final temperature rise with the addition of calcium chloride as formation of bonds stronger than the bonds that are broken. Thus option B is correct.
There has been increased in the temperature as the breaking of bonds has released energy in the solution. With the high energy in the solution, the part of the energy has been used for the bond formation. However the rise results as the bonds formed are stronger than the bonds broken.
The calorimeter has the final temperature of [tex]\rm 52^\circ C[/tex]. The addition of calcium chloride results in a rise in temperature. This has resulted in the formation of bonds stronger than the bonds that are broken. Thus option B is correct.
For more information about the calorimeter, refer to the link:
https://brainly.com/question/10987564
the equation of 3times x is 38
Answers
Answer is 38/3 or 12.67
3x=38
x=38/3
therefore answer is the one mentioned above
how do i make chrystals
Answers
Answer:
1. In the beaker, stir 1/2 cup of Epsom salts with 1/2 cup of very hot tap water for at least one minute. ...
2. Add a couple drops of food coloring if you want your crystals to be colored.
3. Put the beaker in the refrigerator.
4. Check on it in a few hours to see a beaker full of epsom salt crystals!
Explanation:
how do you make fried chicken im white and don't know how to season
Answers
Answer:
lol you use batter use flour salt pepper thats what gives it the fried and crispy taste
Explanation:
4 Al + 3 O₂ --> 2 Al2Ol₃ Given 6 moles of aluminum, how many grams of aluminum oxide will be produced?
Answers
Answer:
305.88 g
Explanation:
4 Al + 3 O₂ → 2 Al₂O₃
First, we convert 6 moles of aluminum (Al) into moles of aluminum oxide (Al₂O₃), using the stoichiometric coefficients:
6 mol Al * [tex]\frac{2molAl_2O_3}{4molAl}[/tex] = 3 mol Al₂O₃
Finally we convert 3 moles of aluminum oxide into grams, using its molar mass:
3 mol Al₂O₃ * 101.96 g/mol = 305.88 g
Calculate the change in heat (Q) that occurs when 7.58grams of steam at 101°C cools to liquid water at 40°C. (cp = 4.184 J/g°C)
Answers
Answer:
Q = 19065.4 J
Explanation:
Q₁ = the required energy for phase change of H₂O from vapor to liquid
Q₁ = mass of H₂O * heat of vaporization
Q₁ = 7.58 g * 2260 J/g
Q₁ = 17130.8 J
Q₂ = energy required to cool the water fro 101°C to 40°C
Q₂ = mass of H₂O * specific heat of H₂O * ΔT
Q₂ = 7.58 × (4.184 J/gC) × (101 - 40)
Q₂ = 1934.6 J
Q = Q₁ + Q₂
Q = (17130.8 + 1934.6) J
Q = 19065.4 J
Which choice represents a compound?Required to answer. Single choice.
(1.5 Points)
Cu
Fe
CO
Br
Answers
Answer:
CO
Explanation:
Elements will only one capital letter, that may/may not have a lower case letter after it. CO has a capital letter followed by another capital, so it's a compound
Which of the following would have three iron atoms in its formula? Iron oxide, iron Ill oxideiron phosphide, or iron phosphide.
Answers
Answer:
1 and 4 and 24
Explanation:
I know this because i passed 1st grade
80g of Sodium react with 40g of Chloride to produce a product of Sodium Chloride. How many grams of sodium chloride will be present after this chemical reaction?
Na2 + 2Cl2 —> 2NaCl2
Students in Ms.Tillman’s class added 100 grams of copper to 15 grams of oxygen. A chemical reaction occurred produced copper oxide, as shown in the equation below
2 Cu + ___O2 —> 2 CuO
What type of reaction is this?
How many total grams should be present at the end of the chemical reaction?
Answers
explanation:i’m just bored at home watching tv
Classify the following as homogeneous or heterogeneous mixtures, or pure
we
is a pure substance, whether it is an element or a
Mixture: homogeneous/
Substance
heterogeneous
Pure substanca
element companie
2.1 Sugar
2.2 Magnesium ribbon
2.3 Vegetable soup
2.4 Bath oil
2.5
Tin of assorted biscuits
2.6
Peanuts and raisins
2.7 Copper wire
2.8
Bicarbonate of soda
(Baking soda)
Answers
Explanation:
Sugar - Pure substance
Magnesium Ribbon - Pure Substance
Vegetable soup Heterogeneous mixture
Bath oil - Homogeneous mixture
Tin of assorted biscuits - Heterogeneous mixture
Peanuts and raisins - Heterogeneous mixture
Copper wire - Pure Substance
Bicarbonate of soda (Baking soda) - Pure Substance