Answer:
This is considered a hypothesis because it hasn't been confirmed. It is just a guess.
Explanation:
A hypothesis is a limited explanation of a phenomenon; a scientific theory is an in-depth explanation of the observed phenomenon. Law is a statement about an observed phenomenon or a unifying concept, according to Kennesaw State University. However, Newton's law doesn't explain what gravity is, or how it works.
Answer:
c
Explanation:
A. It is a statement of fact about how nature works instead of an explanation.
B. It provides an explanation for many observations and accepted hypotheses.
C. It describes how to test a possible explanation of one specific relationship.
D. It has not changed over time even though new technology has been developed.
Name the following aldehyde:
CH3CH2CH2CH2CH2CHO
A) Hexanol
B) Pentahal
C)Hexanal
D)Hepthal
NO SCAM ANSWERS
Answer:
C, hexanal
Explanation:
Option C is correct. The given name of the aldehyde CH3CH2CH2CH2CH2CHO is Hexanal
Aldehydes are organic compounds formed from the oxidation of alcohols. The contains the group -CHO
Given the compound CH3CH2CH2CH2CH2CHO
For us to name this compound, we need to first know:
The longest chain in the compoundSince there are 6 carbons in the chain, hence the alkane equivalent will be hexane.
Since it is an aldehyde compound.
General naming = alkane name + group name of aldehyde
compound name = alkane name + (-nal)
compound name = hexanal
Hence the name of the given aldehyde is Hexanal
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what type of wave moves the particles parallel to the motion of the wave
a.electromagnetic
b. longitudinal
c. transverse
d.water
Answer:
c
Explanation:
Which of the following has the highest concentration?
A 1.2 M phosphoric acid
B 0.9 M phosphoric acid
C 3 M phosphoric acid
D 0.17 M phosphoric acid
The molecular weight of PCl3 is blank
amu.
Answer:
Yes you are correct
Explanation:
But the spelling is black amu
Can carbon and hydrogen form double bonds between them?
Answer:
Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Carbon can form single, double, or triple covalent bonds with other carbon atoms.
The carbon-hydrogen bond (C–H bond) is a bond between carbon and hydrogen atoms that can be found in many organic compounds. This bond is a covalent bond meaning that carbon shares its outer valence electrons with up to four hydrogens. This completes both of their outer shells making them stable.
^Hope it helps, Hazel^
give an example of liquid diffusing into a solid
Answer:
Mecury almagamated zinc
Which of the following is NOT a compound?
Water
Ammonia
Gold
Salt
The gold is not the compound.
The information related to the compound is as follows
It is the substance that contains the same type of molecules having 2 or more elements. It includes water, ammonia, salt, methane, carbon dioxide etc.In this, the elements should be bonded together.Therefore we can say that gold is not the compound.
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PLEASE HELP!!!
Explain how an electric car might still run on fossil fuels.
Answer:
Explanation:
When you use electricity to charge your car, you can integrate renewable resources like solar into the fueling process. Without solar, your electric vehicle is still effectively running off of fossil fuels – it's just the fossil fuels utilized at the power plant and not within your engine.
Fossil fuels include substances like natural gas, coal, and oil. It is possible for electric cars to run on these fossil fuels. Fossil fuels like coal are burnt up to generate electricity. So when cars run on electricity, they are indirectly tapping into fossil fuels.
As the world continues to seek measures to reduce carbon emissions, electric cars are gradually becoming an option. While it is true that these fossil fuels might not be used directly on electric cars, they still find use indirectly in these cars. When coal is burnt up at the power plant to generate electricity, electric cars tap into fossil fuels indirectly.Learn more here:
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3. The hydroxide-ion, [OH-], concentration in a detergent solution is 1.0 x 10-3 M. What is [H+] concentration in the detergent solution?
A) 1.0 x 10^-11 M.
B) 1.0 x 10^-9 M.
C) 1.0 M
D) 0.001 M
Answer:
c
Explanation:
h
What are the types of changes that occur when matter is heated ? Which of these changes produce new substances ?
When you heat something, you add energy to it. This causes the particles to move faster and farther apart. Heating solids turns them into liquids. Turning a solid into a liquid is called melting. Chemical Changes are also called Chemical Reactions. Chemical reactions involve combining different substances. The chemical reaction produces a new substance with new and different physical and chemical properties.
What is the freezing point, in °C, of a solution made with 1.31 mol of CHCl₃ in 530.0 g of CCl₄?
Answer:
-96.6°C
Explanation:
Given:
moles CHCl3 = 1.31 molmass CCl4 = 530.0 gmass CCl4 = 530.0 g * (1 kg / 1000)
mass CCl4 = 0.5300 kg
First calculate the molality (m) of the solute, which is the moles of solute divided by the kg of solvent ([tex]\frac{moles}{kg}[/tex]):
molality CHCl3 = (mass moles CHCl3) / (mass CCl4 in kg)
molality CHCl3 = (1.31 mol) / (0.5300 kg)
molality CHCl3 = 2.471698m
Decrease in freezing point of solvent = (Kf) * (molality of solute)
Decrease in freezing point of CCl4 = (Kf) * (molality CHCl3)
Decrease in freezing point of CCl4 = (29.8°C/m) * (2.47m)
Decrease in freezing point of CCl4 = 73.6566°C
Then use the molality of the solute to calculate the change in freezing point and subtract the change from the original freezing point.
Freezing point of solution =
(freezing point of pure solvent) - (Decrease in freezing point)
Freezing point of solution = (-22.9°C) - (73.66°C)
Freezing point of solution = -96.6°C
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If a reaction releases 675,000 Joules, how many kcal does it release?
Answer: If a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.
Explanation:
According to the standard conversion,
[tex]1 Joule = 0.000239006 kcal[/tex]
Therefore, 675,000 Joules will be converted into kcal as follows.
[tex]1 Joule = 0.000239006 kcal\\675,000 J = 675000 J \times \frac{0.000239006 kcal}{1 J}\\= 161.328872 kcal[/tex]
Thus, we can conclude that if a reaction releases 675,000 Joules then it means it releases 161.328872 kcal.
I have 130 L of gas in a piston at a temperature of 250°C. If I cool the gas
until the volume decreases to 85 L, what will the temperature of the gas be?
This is a Charles' Law problem: V1/T1 = V2/T2. As the temperature of a fixed mass of gas decreases at a constant pressure, the volume of the gas should also decrease proportionally. Here, we are given the new volume of the gas after cooling, and we want to determine to what temperature the gas was cooled.
To use Charles' Law, the temperature must be in Kelvin (x °C = x + 273.15 K). We want to solve Charles' Law for T2, which we can obtain by rearranging the equation into T2 = V2T1/V1. Given V1 = 130 L, T1 = 250 °C (523.15 K), and V2 = 85 L:
T2 = (85 L)(523.15 K)/(130 L) = 342 K or 68.9 °C. If sig figs are to be considered, since all the values in the question are given to two sig figs, the answer to two sig figs would be either 340 K or 69 °C.
Gases show great uniformity in their behaviour irrespective of their nature. The concept Charles's law is used here to determine the new temperature of the gas. The new temperature of the gas is 341.96 K.
What is Charles's law?At constant pressure, the volume of a given mass of gas is directly proportional to the temperature on Kelvin scale. The absolute scale of temperature is introduced by the scientist Charles. The temperature at which gases supposed to have zero volume is called the absolute temperature.
Mathematically the Charles's law can be expressed as:
V = constant × T
V / T = constant
For two different gases, the equation is:
V₁ / T₁ = V₂ / T₂
T₂ = V₂T₁ / V₁
85 × 523 / 130 = 341.96 K
Thus the new temperature of the gas is 341.96 K.
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The weight of the elephant is 4500 kg, and the area of the sole of one of its legs is 1700 cm2. Calculate the pressure of the elephant on the ground.
Answer:
64852.94 N/m²
Explanation:
From the question,
P = F/A.................... Equation 1
Where P = Pressure of the Elephant on the ground, F = Weight of the Elephant, A = Area of the sole of the four legs.
But,
F = mg.............. Equation 2
Where m = mass of the elephant, g = acceleration due to gravity
Substitute equation 2 into equation 1
P = mg/A............ Equation 3
Given: m = 4500 kg, A = (1700×4) cm² ( The elephant has four legs) = 6800 cm² = 0.68 m²
Constant; g = 9.8 m/s²
Substitute these values into equation 3
P = (4500×9.8)/0.68
P = 64852.94 N/m²
the process shown was used by Mendel during his experiments. What is the process called?
Answer: cross-pollination
Explanation:
Help me please. Any help will be appreciated
Answer:
If they mean the type of animal in the first question, they are both foxes.
They have different fur colors and are in different location/habitats
Yes, they are the same animal because they have almost the same features; Their fur color is different so they can blend better into the environment around it.
Explanation:
I hope this helps
Lithium has a specific heat of 3.560 J/gºC, and ethanol has a specific heat of 2.450 J/gºC. Based
on this information, which best compares lithium and ethanol if there is an equal amount of both substances?
HELP ASAP PLZZZ!
Answer:
they are both equal
Explanation:
if you don't know don't guess troll the teacher you will get it wrong anyway
In general, what happens when a subscript is found
outside of parentheses?
Answer:
you multiply it by the other subscripts in the parenthesis.
Explanation:
What is the molar mass of Ca(NO3)2?
a 102.2 g/mol
b 134.1 g/mol
c O 164.1 g/mol
d 0 204.2 g/mol
Answer:
C.164.1g/mol
Explanation:
40+14×2+16×6
164
The molar mass of Ca(NO3)2 is 164.1 g/mol.
What is Calcium nitrate?
Calcium nitrate, also called Norgessalpeter (Norwegian salpeter), is an inorganic compound with the formula Ca(NO3)2(H2O)x. The anhydrous compound, which is rarely encountered, absorbs moisture from the air to give the tetrahydrate. Both anhydrous and hydrated forms are colourless salts. Calcium nitrate is mainly used as a component in fertilizers, but it has other applications. Nitrocalcite is the name for a mineral which is a hydrated calcium nitrate that forms as an efflorescence where manure contacts concrete or limestone in a dry environment as in stables or caverns. A variety of related salts are known including calcium ammonium nitrate decahydrate and calcium potassium nitrate decahydrate.
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A ship is sailing at a speed of 5 km/hr. What distance has it covered, 2 hours after it left the port?
Answer:
10km
Explanation:
Answer:
[tex]\boxed {\boxed {\sf 10 \ kilometers}}[/tex]
Explanation:
Distance is the product of speed and time.
[tex]d=s \times t[/tex]
The speed of the ship is 5 kilometers per hour. The time is 2 hours.
s= 5 km/hr t= 2 hrSubstitute the values into the formula.
[tex]d= 5 \ km/hr * 2 \ hr[/tex]
Multiply. Note that the hours will cancel each other out.
[tex]d= 5 \ km * 2 \\d=10 \ km[/tex]
The ship covers a distance of 10 kilometers.
the minister in change of religious and charititable patreonage was known as
Answer:
sadr
Explanation:
Pls give brainlist
gallium chlorate decomposes
Answer:
Explanation:
in the decomposition of gallium chlorate, 75.0grams is heated to produce oxygen and gallium chloride.
Fluorine, chlorine, and bromine react with gold.
which 1 of the 3 elements will be the most reactive with gold
thanks
Answer:
gold i believe or possibly bromine
Explanation:
q- how does fluorine react with gold
a- this fluoride compound features gold in its highest known oxidation state. this red solid dissolves in hydrogen fluoride, but these solutions decompose, liberating fluorine.
q- how does chlorine react with gold
a- gold does react with halogens. it'll, for example, react very slowly with chlorine gas at room temperature to form gold chloride, AuCl3. if gold chloride is heated gently, it will decompose to release the pure elements again.
q- how does bromine react with gold
a- gold in bromine solutions dissolves according to electrochemical/chemical (EC) mechanisms. ... in the chemical composition of the mechanism, this monovalent gold bromide disproportionate into gold and stable AuBr −4 , which reports into solution. with respect to pH, there are two characteristic dissolution regions.
** sorry that i can't provide a sure answer**
good luck :)
i hope this helps
have a nice day!
Fluorine will be most reactive with gold.
What is fluorine?
Of almost all of the elements, fluorine seems to be the most electronegative as well as reactive. Fluorine would be a diatomic, pale yellow, extremely corrosive, combustible gas with a strong smell. The lightest halogen would that be. It produces oxygen and even the incredibly corrosive hydrofluoric acid when it combines strongly with water.
What is reactive?Reactivity would be a substance's capacity to chemically combine with several other substances. Iron, for instance, reacts vigorously with oxygen.
As you move down the group, the halogens, which are non-metal elements in Group 7, become less reactive. In contrast to the alkali metals within Group 1 of the particular periodic table, this trend is the opposite. One of the most reactive elements in Group 7 was fluorine.
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How many grams are in 6.02E23 atoms of carbon?
Answer:
no sure
Explanation:
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Answer:
B and D
Explanation:
Bc it has more fat than the other
A solution has [OH-]=3.5*10^-6. Based on that, what must be true about this solution?
Answer:
Option B. It is a basic solution.
Explanation:
To know which option is correct, let us calculate the pH of the solution.
First, we shall determine the pOH of the solution. This is illustrated below:
Concentration of Hydroxide ion, [OH¯] = 3.5×10¯⁶
pOH =.?
pOH = –Log [OH¯]
pOH = –Log 3.5×10¯⁶
pOH = 5.5
Finally, we shall determine the pH. This can be obtained as follow:
pOH = 5.5
pH =?
pH + pOH = 14
pH + 5.5 = 14
Collect like terms
pH = 14 – 5.5
pH = 8.5
The pH scale reads as follow:
0 to 6 => Acidic
7 => Neutral
8 to 14 => Basic
Comparing the pH of the solution (i.e 8.5) with the pH scale, we can conclude that the solution is basic because the pH of solution lies between 8 and 14.
Match each scientist to their discovery regarding the atom
Thomson
Electrons have a charge of -1.
Rutherford
Atoms are indivisible
Millikan
Atoms have a positive nucleus
Dalton
Atoms contain electrons.
Answer:
Thomson--atoms cotain electron
Ernest Rutherford--atoms have a positive nucleus
R.A Millikan--electrons have Q=-1
Dalton--atoms are indivisible
Millikan---> Electrons have a charge of -1
Rutherford ---> Atoms have a positive nucleus
Thomson -----> Atoms contain electrons
Dalton --------> Atoms are indivisible
The atomic theory went through several modifications and different scientists proposed various models of the atom until our present conception of the atom was developed.
The atom was first defined as the smallest indivisible particle of a substance. This idea of "indivisibility" of the atom stems from Dalton's theory.
The fact that atoms were composed of negatively charged electrons was proven by the experiments of J.J Thompson using the cathode ray tube. Millikan's charge to mass experiment showed that the electron has a charge of -1.
Rutherford, in his famous gold foil experiment showed that atoms were composed of a positively charged nucleus.
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Water (H2O) is a polar molecule. Ethane (C2H6) is nonpolar.
What is true about water and ethane?
Ethane is likely to have a higher boiling point because it is nonpolar.
Ethane is likely to have a higher boiling point because it has fewer atoms per molecule.
Water is likely to have a higher boiling point because it has fewer atoms per molecule.
Statement which is true about ethane and water is that water is likely to have a higher boiling point because it has fewer atoms per molecule.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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Use the balanced equation from #13 to answer the following:
Calculate how many moles of SO2 can be produced with when given 75 grams of CS2.
Now calculate how many moles of SO2 can be produced with when given 96 grams of O2.
Which one is the limiting reactant (75 grams of CS2 or 96 grams of O2)? How do you know?
Answer:
1. 9600 moles
2. 4096 moles
Explanation:
CS2 + 3 O2=> CO2 + 2 SO2
1. The ratio for CS2: SO2 is :
1:2
If there are 75g of CS2 then there are:
75 × 2= 150g of SO2
Moles = mass × Mr
Moles = 150 × 64
Moles = 9600
2. The ratio for O2 : SO2 is:
3:2
If there are 96g of O2 then there are:
96 × 2/3 = 64g of SO2
moles = mass × Mr
Moles = 64 × 64
Moles = 4096
Answer: The FitnessGram PACER Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The test is used to measure a student's aerobic capacity as part of the FitnessGram assessment. Students run back and forth as many times as they can, each lap signaled by a beep sound.
Explanation:
Forested land in the area was cleared to make several building lots. Trees were left on the outskirts of each lot. This is a picture of
one lot that has not sold, so there has been no house built. If the lot does not sell, predict how this area will look in another five
years.
A)
The land will be forested once again.
B)
The plot of land will be covered with grasses and flowers.
C)
The weeds will be replaced by woody shrubs and some small trees.
Answer:
C
Explanation:
The weeds will be replaced by woody shrubs and some small trees.
If the forest land is cleared, it is hard to construct a forest again. The cleared land will grow as grass land then if there is no constructions or buildings fills the land. Hence, option B is correct.
What is forstation?Forestation is the process of formation of forests and dense growth of trees and other kinds of plants. Forests are example of ecosystems and wide variety of plant species and animals are living there.
Nowadays, deforestation is common for the selfish purposes of man to buildups their own amenities so that, many more plants and animals are on the edge of extinction.
There are naturally made forests as well as man made forests. It was results of hard working that to form a forest with all its atmosphere and biodiversity will take longer time. It will not happen within just five years.
Thus, if the forest land is cleared, the empty ground may fill with grasses and flower plants. Hence option B is correct.
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