Please help me I will give brainliest to the first correct answer
Answer:
OPTIC B) HEPT-HOPE IT IS HELPFUL
Pls answer this Il give brainiest question in picture ty
Answer:
c
Explanation:
troposphere is the answer
The concentration of carbon-14 in a piece of wood from an ancient burial mound indicates that two half-lives of this radioisotope have passed. If the half-life (t 1/2) for carbon-14 is 5730 years, approximately how many years ago did this sample of wood die?
If the half-life for carbon-14 is 5730 years, then it will take 11,460 years to complete die of this sample.
What is half life period?Half life period is a time of decay in which concentration of reactant is left half of its initial concentration, means half of the reactant will convert into product.
Total time of decay will be calculated as:
T = (t)ⁿ, where
t = half life time = 5730 years
n = number of half lives = 2 (given)
On putting values, we get
T = (5730)² = 11,460 years
Hence required time for decay is 11,460 years.
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Answer:
The first part is 5 and the second part is 28,650
The pressure of a certain amount of gas in a 1.25 L balloon is 760 torr. What would the pressure of that balloon be if it's volume was increased to 2.15 L?
440 torr
General Formulas and Concepts:Chemistry
Ideal Gas Law
Boyle's Law: P₁V₁ = P₂V₂
P₁ is pressureV₁ is volumeP₂ is new pressureV₂ is new volumeMath
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of Equality Explanation:Step 1: Define
Identify
[Given] V₁ = 1.25 L
[Given] P₁ = 760 torr
[Given] V₂ = 2.15 L
[Solve] P₂
Step 2: Solve for P₂
Substitute in variables [Boyle's Law]: (760 torr)(1.25 L) = P₂(2.15 L)Multiply: 950 torr · L = P₂(2.15 L)[Division Property of Equality] Divide 2.15 L on both sides: 441.86 torr = P₂Rewrite: P₂ = 441.86 torrStep 3: Check
Follow sig fig rules and round. We are given 2 sig figs as our lowest.
441.86 torr ≈ 440 torr
is how much a material opposes electric current.
*
insulator
conductor
resistance
short circuit
Answer:
Resistance
Explanation:
Resistance is the measure of the opposition of current in a circuit.
how many moles are in 0.14g of Nitrogen, N2?
Answer:
0.01 moles
Explanation:
14 g contains 1 mole
0.14g contains> (0.14*1)/14
= 0.01 moles
High levels and long periods of stress can increase a person’s risk for many diseases.
True
False
Answer:
true
Explanation:
Which of the following must be
TRUE if a solution is to be
considered acidic?
A. [H^+] < [OH)
B. [H^+] > [OH ]
C. KW= [H^+] /[OH]
D. [H^+] =[OH)
Answer:
c
Explanation:
kw=h+bls
Examine the food chain below: In this specific food chain, the _______ eats plants for food. A. caterpillar B. sunshine C. bobcat D. leaf
A student investigates the reaction between sodium hydroxide solution and dilute sulfuric acid.
He does a titration to find the concentration of the sulfuric acid.
(a) Give the colour change of the methyl orange indicator at the end-point.
Explanation:
the colour change will be from orange to pink
The color change of the methyl orange indicator at the end-point will show orange to pink.
What is indicator?In an acidic or basic medium, an indicator is just a material that changes color. Indicators are termed indicators because they show one color in an acidic media and different colors in a basic medium. Indicators come in a variety of shapes and sizes: Natural indicators are indicators acquired from natural sources.
It is a just a acid base reaction in which methyl orange acts as a indicator.
In this reaction, when sodium hydroxide solution and dilute sulfuric acid are reacts with each other then after using( indicator)methyl orange the color will be change form orange to pink which indicates the nature of solution will be acidic.
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If 250. ML of water are poured into the measuring cup, the volume reading is 8.45 oz . This indicates that 250. ML and 8.45 oz are equivalent. How many milliliters are in a fluid ounce based on this data?
Answer:
[tex]1oz=29.589ml[/tex]
Explanation:
From the question we are told that:
Initial Volume [tex]v_1=250ml[/tex]
Final Volume [tex]v_2=8.45oz[/tex]
Generally the equation for one ounce is mathematically given by
[tex]1oz=\frac{v_1}{v_2}[/tex]
Therefore
[tex]1oz=\frac{250}{8.45}[/tex]
[tex]1oz=29.589ml[/tex]
Can someone please help, 20 points
Draw 3-ethyl-2,4-dimethyl octanoic acid
3-ethyl-2.4-dimethyl-octanoic acid
112 g of aluminum carbide react with 174 g water to produce methane and aluminum hydroxide in the reaction shown below.
2 Al4C3(s) + 12 H2O(l) → 3 CH4(g) + 4 Al(OH)3(s)
If aluminum carbide is the limiting reactant, how many moles of the excess reactant are left over
a
37.3 mol
b
4.68 mol
c
7.33 mol
d
131.94 mol
Answer: 4.999 moles of excess reactant will be left over.
Explanation:
Limiting reagent is defined as the reagent which is completely consumed in the reaction and limits the formation of the product.
Excess reagent is defined as the reagent which is left behind after the completion of the reaction.
The number of moles is defined as the ratio of the mass of a substance to its molar mass.
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}[/tex] .....(1)
Given mass of aluminium carbide = 112 g
Molar mass of aluminium carbide = 143.96 g/mol
Putting values in equation 1:
[tex]\text{Moles of aluminium carbide}=\frac{112g}{143.96g/mol}=0.778mol[/tex]
For the given chemical reaction:
[tex]2Al_4C_3(s)+12H_2O(l)\rightarrow 3CH_4(g)+4Al(OH)_3(s)[/tex]
By the stoichiometry of the reaction:
2 moles of aluminium carbide reacts with 12 moles of water
So, 0.778 moles of aluminium carbide will react with = [tex]\frac{12}{2}\times 0.778=4.668 mol[/tex] of water
Given mass of water = 174 g
Molar mass of water = 18 g/mol
Putting values in equation 1:
[tex]\text{Moles of water}=\frac{174g}{18g/mol}=9.667mol[/tex]
Moles of excess reactant (water) left = 9.667 - 4.668 = 4.999 moles
Hence, 4.999 moles of excess reactant will be left over.
Please choose a claim and then answer the question below please ty I would appreciate it!
Answer:
Claim 1
Explanation:
I chose this claim because I believe that when the plates under the earth move or shift, that's what causes an earthquake and when everything starts to shake. If it was the other way around there wouldn't be any reason for an earthquake to start.
hope that helped :)
Answer:
Plates move, which can cause earthquakes.
Explanation:
Tectonic plates are always slowly moving, however sometimes they can "lock" together, creating pressure and build up. The release of this energy results in a Tectonic earthquake. Therefore, the movement of plates causes earthquakes.
What is the molar it's of a solution that has 0.080 moles of calcium chloride dissolved in 850mL of solution.
Answer:
The molarity of the solution is 0.094 [tex]\frac{moles}{liter}[/tex]
Explanation:
Molarity is a measure of the concentration of that substance and is defined as the number of moles of solute that are dissolved in a given volume.
The molarity of a solution is calculated by dividing the moles of the solute by the volume of the solution:
[tex]Molarity=\frac{number of moles of solute}{volume}[/tex]
Molarity is expressed in units[tex]\frac{moles}{liter}[/tex].
In this case:
number of moles of solute: 0.080 molesvolume= 850 mL= 0.850 LReplacing:
[tex]Molarity=\frac{0.080 moles}{0.850 L}[/tex]
Solving:
Molarity= 0.094 [tex]\frac{moles}{liter}[/tex]
The molarity of the solution is 0.094 [tex]\frac{moles}{liter}[/tex]
The chemical equation for zinc in hydrochloric acid is: Zn + HCI = ZnCl2 + H2
Does the above equation demonstrate the law of conservation of mass as it is currently written? Explain why or why not.
Answer: No it does not
Explanation:
The law of conservation of mass states that mass is neither created nor destroyed and in this equation you start with 1 molecule of Cl and 1 of H, but on the reactants side you end up with 2 of each. To make it follow the law of conservation of mass you would have to balance the equation
How do I calculate the pOH of a Solution at 25℃ with a [OH-1] = 6.5 x 10-9 M and state whether the Solution is Acidic, Basic, or Neutral?
Answer:
pOH = 8.19
Acidic solution (pH < 7.0)
Explanation:
The pOH of the solution is defined as:
pOH = - log [OH⁻]
Since we have [OH⁻] = 6.5 x 10⁻⁹ M, we calculate the pOH as follows:
pOH = - log (6.5 x 10⁻⁹) = 8.19
To know if the solution is acidic, neutral or basic, we have to calculate the pH from the value of pOH:
pH + pOH = 14
⇒ pH = 14 - pOH = 14 - 8.19 = 5.81
The solution is acidic because pH < 7.0.
Which statement compares the relative strength of the electric forces that hold particles together
A. The force between two nonpolar molecules are stronger than the force between positive ions and freely moving electrons
B. The force between two polar molecules are stronger than the force between positive ions and freely moving electrons
C. The force between positive and negative ions is weaker than the force between two polar molecules
D. The force between two nonpolar molecules is weaker than the force between positive ions and freely moving electrons
A.the force between two non polar molecules are stronger than the force between positive ions and freely moving electrons
El petróleo crudo, es decir, en estado natural,
se encuentra embebido en las rocas porosas de
la corteza terrestre, semejante al agua en una
esponja, y no a manera de lagos subterráneos,
como se cree. Por lo general, el pozo petrolero
contiene en su parte superior una gran masa de
gas. Responde:
a) ¿Qué precauciones se deben tener en la explo-
tación del petróleo?
b) ¿Cuál es el impacto ambiental de la explotación
del petróleo?
c) ¿Qué compromisos debe cumplir una em-
presa que explota el petróleo en relación con el
medio ambiente?
why are vials made from vapor glass stronger then typical vials?
I.they contain aluminum instead of boron.
II. They submerged in hot salt bath.
III. They formed out of long glass tubes.
A) I
B) I and II
C) I and III
D) I, II, and III
Answer:
2
Explanation:
I'm not that sure plz tell me if this is right
Gas particles that are at low temperature and high pressure and are close to changing phases are considered:
a)Real Gases
b)Ideal Gases
c)Both Ideal and Real Gases
Is this an alpha or beta decay?
Which of the following best describes asexual reproduction?
it produces offspring with a large amount of genetic variation
it occurs in simple organisms, such as bacteria, but not in multicellular organism such as plants and animals
it allows species to quickly adapt to environmental changes
it can be an advantage to organisms that live in a stable unchanging environment
Answer:
First Choice
it produces offspring with a large amount of genetic variation
Answer: i think this is correct.
Explanation: it occurs in simple organisms, such as bacteria, but not in multicellular organism such as plants and animals
when chlorine gas is passed through potassium Bromide solution Potassium Chloride and bromine are formed which is a more reactive non metal bromine or chlorine
[tex] \boxed{\boxed{\huge{ \mathbf{ \underline{ Answer} \: \: ✓ }}}}[/tex]
In a displacement reaction, more reactive element displaces less reactive element from its compound and from the above reaction we observed that, Chlorine displaces bromine from its compound (KBr) to form Potassium chloride (KCl), therefore Chlorine is more reactive non - metal.
The equation for above reaction is :
[tex] \large\boxed {\mathrm{2KBr + Cl_2 \rightarrow 2KCl + Br_2}}[/tex]
_____________________________
[tex]\mathrm{ ☠ \: TeeNForeveR \:☠ }[/tex]
Acceleration is inversely proportional to the:
Force
Mass
Depends on the acceleration given
Giving brainlist on this one
I would be grateful!
Answer:
Explanation:
acceleration is inversely proportional to the mass of an object.
Newton's second law states that "the acceleration produced on a body is directly proportional to the resultant force anf inversely proportional to its mass".
How many questions would you need to separate ten arthropods into different branches
Answer:
10.
Explanation:
We need 10 question to separate ten arthropods into different branches because each arthropod belongs to separate branch and each branch needs explanation. Phylum Arthropoda is considered as the largest phylum in the animal world, and insects form the largest class within this phylum due to its highest number of individual or organisms. Each arthropods are different from one another so they needs more questions to separate them from each other.
Any change in average weather conditions on Earth that lasts for at least several decades is called
Answer:climate change
Explanation:
Water can keep engines operating at low temperatures. Which property of water most likely gives it this ability?
A. it boils at around 100°C
B. it has a high heat capacity
C. it is a good lubricant
D. it can change from water to ice
Answer:
B: it has a high heat capacity
Explanation:
When any material has a high specific heat capacity/ heat capacity, it doesn't heat or cool very fast. So water can absorb more heat from the engine and can keep the engine cool or at low temperature for a longer period of time.
the tissue which continually forms new cells in plants
Answer:
Meristematic Tissues. Tissues where cells are constantly dividing are called meristems or meristematic tissues. These regions produce new cells.
Explanation:
thank me later
que tipo de fermentacion es al mezclar el agua tibia con levadura
Answer:
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