Answer:
So, higher electronegativity helps atoms take more control over shared electrons creating partial negative regions and partial positive regions which result in dipoles that cause polarity. The molecule's polarity will be determined on the negative and positive regions on the outer atoms in the molecule
_______ have cells that are all dried out.
Explanation: the answer plant seeds
not skin
Unsorted sands have a lower porosity.
True
O False
Answer:
True
Explanation:
Elements in Group I of the Periodic Table react with water.
Which row describes the products made in the reaction and the trend in reactivity of the elements?
Answer:
B
Explanation:
Soil is the result of weathering?
Answer:
yes, soil is weathered from the bedrock below the subsoil. Soil contains whatever the bedrock below it consist of whatever the bedrock below it is made of.
Explanation:
Hope this helps!
What volume of H2S is needed to produce 14.2 L of SO2 gas? The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O.
Answer:
14.2 L H2S
Explanation:
Mole ratio
2 mol H2S:2 mol SO2
We are just looking for volume, so the required amount is the same as the produced amount as long as the mole ratio is balanced.
The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.
What is Mole ratio?Two factors can be used to identify stoichiometry problems: the information provided in the problem and he information that needs to be solved for, also known as the unknown.
The given and the unknown might both be reactants, could both be products, or could both be products with one of them acting as a reactant. Mole amounts can be used to express the substance quantities.
However, it is typical in a laboratory setting to calculate a substance's mass in grams to determine how much of it is present. A gaseous substance's volume can be used to express its quantity.
Therefore, The balanced equation is: 2H2S + 3O2 → 2SO2 + 2H2O. Mole ratio 2 mol H2S:2 mol SO2.
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Determine the concentration of strontium ions in saturated solution of strontium sulfate, SrSO4, if the Ksp for SrSO4 is 3.2x10-7.
Answer:
[tex][Sr^{2+}]=5.66x10^{-4}M[/tex]
Explanation:
Hello there!
In this case, given the solubility equilibrium of strontium sulfate:
[tex]SrSO_4(s)\rightleftharpoons Sr^{2+}(aq)+SO_4^{2-}(aq)[/tex]
Whose equilibrium expression is:
[tex]Ksp=[Sr^{2+}][SO_4^{2-}][/tex]
In such a way, we can introduce the molar solubility, s, in the equation to obtain:
[tex]Ksp=s*s=s^2\\\\3.2x10^{-7}=s^2[/tex]
Then, we apply the square root to obtain:
[tex]s=\sqrt{3.2x10^{-7}}\\\\s=5.66x10^{-4}M[/tex]
Which is also the concentration of strontium ions:
[tex][Sr^{2+}]=5.66x10^{-4}M[/tex]
Best regards!
An empty beaker weighs 20g and when filled with
Kensene weighs 60g. If the Volume of the kerosene is 15cm2 calculate
the density of the kerosene
Answer: The density of kerosene is [tex]2.7g/cm^3[/tex]
Explanation:
Density is defined as the mass contained per unit volume.
[tex]Density=\frac{mass}{Volume}[/tex]
Given : Mass of kerosene = mass of beaker with kerosene - mass of empty beaker = 60 g - 20 g = 40 g
Volume of kersone = [tex]15cm^3[/tex]
Putting in the values we get:
[tex]Density=\frac{40g}{15cm^3}[/tex]
[tex]Density=2.7g/cm^3[/tex]
Thus the density of kerosene is [tex]2.7g/cm^3[/tex]
Cu + 2 AgNO3 Cu(NO3)2 + 2 Ag
How many grams of silver nitrate can be formed from 29 grams of silver?
Answer:
the answer is "a" took the test
Explanation:
PLEASE HURRY I'M TIMED Where does the flow of energy begin in every ecosystem?
the consumers
the producers
the sun
the herbivores
Identify each of the following as a single bond, double bond, or triple bond.
What element is 1s^2 2s^2 2p^6 3s2 3p^3
Answer:
Phosphorus
Explanation:
If you add up all the electrons (the exponents) it equals 15 which is the atomic number of phosphorus. And since stable atoms have the same number of protons and electrons it'll be phosphorus
Consider the reaction below.
HI + H2O → H30++
Which is an acid-conjugate base pair?
O HI and H20
O H2O and Hž0+
OH30+ and I
O HI and
Answer:
HI and I-
Explanation:
Hello there!
In this case, according to the acid ionization of hydroiodic acid:
[tex]HI+H_2O\rightarrow I^-+H_3O^+[/tex]
Now, since the acid, HI, results in the conjugate base, I- and the base, H2O in the conjugate acid, H3O+, it is correct to assert that the acid-conjugate base pair is HI and I-
Best regards!
The acid-conjugate base pair in the reaction above is HI and I-. Details about conjugate base can be found below.
What is a conjugate base?A conjugate base is the substance formed when an acid loses or donates its proton or hydrogen ion.
According to this question, the following reaction is given:
HI + H2O → H30+ + I-
The acid in this reaction is HI while the conjugate base is I-.
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Short Answer/Essay
Note: Your teacher will grade your responses to questions 19 and 20 to ensure you receive proper credit for your answers.
What is global warming? What can people do to reduce global warming?
Answer:
lol global warming is the gradual increase in the temperature of the earth and its atmosphere. this is do to the greenhouse effect caused by increased levels of carbon dioxide.
Explanation:
common knowledge
Where in nature would we find pure
sand that does not contain smaller or
larger particles?
Explanation:
Sand is a common material found on beaches, deserts, stream banks, and other landscapes worldwide. In the mind of most people, sand is a white or tan, fine-grained, granular material. However, sand is much more diverse - even beyond the pink sand beaches of Bermuda or the black sand beaches of Hawaii.
A certain automobile contains 4 tires, 2 headlights, 1 steering wheel,
and 6 spark plugs. How many of each part will be required to build 17 of
these cars?
Answer:
143 parts I think probably not
Gas Giant Planets Rocky Small Solar System Star Sun
The ____1_____ and the ____2____ form the ____3____. The sun is an enormous ____4____. The planets move around the sun. Mercury, Venus, Earth, and Mars are the four ____5____, ____6____ planets. Jupiter, Saturn, Uranus, and Neptune are the four ____7____, ____8____ planets
A gas at 55.0°C occupies a volume of 3.60L. What volume will it occupy at 30.0° C?
Pressure is constant
Answer:
3.33L
Explanation:
A toy car rolls 8 meters in 2 seconds. What is the average speed of the toy car?
16 m/s
10 m/s
4 m/s
6 m/s
butanoic acid + 1-pentanol
catalyst
→ water +X
Given the equation:
To which class of organic compounds does product X belong?
1. alcohol
2. Ester
3. Ether
4. 4. alkane
Answer: X is an Esther
Explanation: alcohol and carboxylate acid forms esters
When a carboxylic acid and alcohol react then-new substance is produced from esterification and hence is called an ester. Thus, option 2 is correct.
What is esterification?Esterification is the process to make esters from carboxylic acids and alcohol in the presence of an acid catalyst (dry sulphuric acid). The -COOH group of the carboxylic acids contributes to the formation of the esters.
The esterification reactions are reversible reactions and occur at a slower pace. The reaction between an acid and alcohol is shown as:
Butanoic acid + 1-pentanol (catalyst) → water + ester
Therefore, option 2. ester is produced.
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Students were shown models of two atoms and asked to make a list of similarities and differences between the models.Which statement about the atomic models shown is correct?
Answer:
lol you don't have the models showing but I found this question online
" Both models represent atoms with the same atomic number. "
Explanation:
hope this helps
Homeostasis is the balance between your internal and external environments. We
learned three major factors that your body helps to regulate. Match each description
of body responses on the right to the types of regulation on the left.
Regulation of Body
Temperature
Regulation of Blood pH
Regulation of Blood glucose
———————————————
1. Sweat or shivering helps control
this
2. Breathing faster or slower help
adjust this
3. Eating or drinking help adjust this
Answer:
They are already matched for you. It goes
1.
2.
3.
in the order of the questions.
What term is used by chemists to quantitatively describe a solution in which a relatively small amount of solute is dissolved?
Helpppp plzzz (will mark brainlest)
Answer:
hydrogen and cloride + hydrogen
What are 2 diseases caused by coronaviruses?
Which one of the samples contains the most molecules?
o
A. 1 mol of CO2(g)
B. 1 mol of UF6(g)
O C. 1 mol CH3COOH()
D. They all have the same number of molecules
Answer: D is right
Explanation: One mole contains 6.0225 ·10^23 molecules
Despite of the substance
Describe bonding in water molecules using the VBT. Show the overlap of hybridised orbitals leading to the formation of H2O molecule. Account for the bond angle 104.5°
Carbon dioxide reacts with lithium hydroxide to produce lithium carbonate and water.
What mass of lithium hydroxide would be required to react with 1.00 x 103 grams of carbon dioxide?
Answer:
1.08827 x 10^3 g.
Explanation:
The equation for the reaction is:
2LiOH + CO2 ----> Li2CO3 + H2O
Using the molar masses:
CO2 = 12.011 + 2* 16 = 44.011.
LiOH = 6.94 + 1.008 + 16 = 23.948
S0 44.011 of CO2 reacts with 2*23.948 g of LiOH
1.00 *10^3 g CO2 reacts with 2*23.948 * 1.00 *10^3 / 44.011
= 1088.27 g LiOH.
.In a _____ relationship one variable increases and a second variable increases proportionally,
A. inverse relationship/inversely proportional
B. direct relationship/directly proportional
C. converse relationship/conversely proportional
Answer:
Explanation: b
Describe how crude oil is separated into fractions by fractional distillation.
Answer:
Crude oil is separated by fractional distillation. Crude oil is heated to vaporize the different hydrocarbons in a tank which is cool at the top and hot at the bottom. The vapours then rise and the different hydrocarbons condense at their specific boiling points, allowing them to be separated.
Who formed the first atomic theory?
The answers is John Dalton FYI I’m just letting people know just incase they don’t know
Answer:
Leucippus and Democritus
Explanation:
Hope this helps~ :D
Thank you so much! :D