Answer:
Pretérito (Pretérito perfecto):
estiró, sudó, peleó, compartí
Copretérito (Pretérito imperfecto):
saludaba, pedias, leia, compraba, barrias, cargaba, estrenabas, escribian
Explanation:
Los verbos en pretérito, también llamado pretérito perfecto, son los siguientes:
estiró, sudó, peleó, compartí
Como se aprecia, los verbos conjugados en pretérito perfecto terminan la última sílaba en vocal con acento, es decir, -á, -é, -í u -ó.
Los verbos en copretérito, también llamado pretérito imperfecto, son los siguientes:
saludaba, pedias, leia, compraba, barrias, cargaba, estrenabas, escribian
Como se aprecia, los verbos conjugados en pretérito imperfecto terminan la última sílaba en -ía, ías, -ían, -aba, -abas o -aban.
Type the correct answer in the box.
What's the velocity of the balloon? Use V=VKE
A hot air balloon with a mass of 400 kilograms moves across the sky with 3,200 joules of kinetic energy. The velocity of the balloon is meters/second.
Reset
Next
Answer:
4 m/s
Explanation:
Step 1: Given data
Mass of the balloon (m): 400 kgKinetic energy of the balloon (KE): 3200 JStep 2: Calculate the velocity (v) of the balloon
The kinetic energy is the energy that the balloon has due to its movement. We can calculate the velocity of the balloon using the following expression.
v = √(2 × KE/m)
v = √(2 × 3200 J/400 kg) = 4 m/s
What is the charge of all elements in the alkaline earth metal group?
O-2
O-3
O + 2
O + 1
Answer:
I beleve it would be -3 or -2
Explanation:
How many moles of solute are present in
0.5L of 0.2M KNO3?
Answer:
0.5mol
Explanation:
It’s a half or 1/2
PLS HELP GIVING BRAINLESS During a Chemical reaction substances (called reactants) are combine to form of new substances (called products). Which of the following accurately describes reactants and products of a Chemical reaction?
A) The product contains a different number of atoms then the reactants but have the same properties
B) The number of atoms in properties are the same in there reactants and Products
C) The products contain the same number of atoms as the reactants but have different properties
D) The number of atoms and properties are different in the reactants and the products
Answer:
your answer is gonna most likely be b
Find the number of moles of argon in 804g of argon
Answer:
20.126164013216783
Hope it helps
Please mark me as the brainliest
Thank you
At equilibrium,
a. the forward reaction rate is equal to the reverse reaction rate.
b. the forward reaction rate is higher than the reverse reaction rate.
c. no reactions take place.
d. the forward reaction rate is lower than the reverse reaction rate.
Hi just wanted to say thank you for answering my question and I wanted to help so I believe the answer is A.
Which of these processes causes a physical change in the shape of a
material?
O
A. Burning
B. Shredding
C. Evaporating
D. Boiling
Answer and Explanation:
I know Burning(A), Shredding(B) can cause a physical change in the shape of a material
but id.k which one is correct..
15 POINTS!!!!!
Distillation always requires the addition of energy to convert a substance to a gas. What is the source of energy in the illustration?
Answer:
no illustration, so its impossible to say- but on mooshiners they "hot that mash up usin a big ol wood fahr"
If you have 2 solutions: one equal to 9mol/L and another with 6 mol/L,
which statement is true? *
O
9 mol/L solution is thicker than the 6 mol/L solution
о
6 mol/L solution is less concentrated than the 9 mol/L solution
9 mol/L solution is less concentrated than the 6 mol/L solution
O 9 mol/L solution is equally as concentrated as the 6 mol/L solution
Answer:
Explanation:
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N2(g) + 3 H2(g) 2 NH (g)
12 How many moles of hydrogen are consumed to produce 100 g of ammonia?
A 17.8 mol H2
B. 17.6 mol HE
C 8.80 mol H2
D3 91 mol H2
Answer:
This is a stoichometric ratio
Explanation:The equation is already balanced, so all you have to do is.
1. Count the molar mass of Ammonia N nitrogen atom has an atomic mass of 14 so add 14+ 3 hydrogens which each have a mass of 1 that gives you 17 grams per mole of ammonia on the right side, so they want to know how much hydrogen is needed to make 100 grams of ammonia, so what you have to do is divide 100/17=2.94 that is your ratio so you now know there is 2.94 times everything in the equation so at first you had 3 moles of hydrogen now you have 3*2.94 moles of hydrogen. You also have 2.94 moles of N2 gas. It's just a ratio if you plug in 200 instead you have to multiply everything by 200/17=11.76 ratio.
1st step count molar mass of product.
2nd plug number they gave you and divide it by molar mass ratio then multiply everything in equation by that ratio.
Balance the equation for this reaction:
_ FeCl3 + KSCN --
--> _ KCI + Fe(SCN)3
Explanation:
FeCl3 + 3 KSCN ➡ 3 KCl + Fe(SCN)3
Hope it helps
Jimmy uses electrolysis to decompose a hydrochloric acid solution. The hydrochloric acid solution is called the... what?
Answer:
electrolyte
Explanation:
A lliquid which contains ions and can be decomposed by electrolysis
What is electrolyte ?
Electrolytes are minerals in your blood and other body fluids that carry an electric charge. Electrolytes affect how your body functions in many ways, including the amount of water in your body.
What are the products of electrolysis of dilute HCl?
Dilute hydrochloric acid is a mixture of HCl and water. So, the electrolysis of HCl and water takes place. For HCl, Chlorine gas is produced at the anode and Hydrogen gas is evolved at the cathode.
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Question 8 (2.5 points)
Complete and balance the following neutralization reaction:
Ca(OH)2(aq) + HCIO3 -->
What are the products of this reaction before balancing?
CaClO3 and H2O
Ca2CO3 and H20
O Cal and CIO30H
Ca(ClO3)2 and H20
no reaction
Answer:
Ca(ClO₃)₂ and H₂O
Explanation:
Since this is a neutralization reaction between chloric acid and calcium hydroxide, water must be formed.
Ca(OH)₂ + 2 HClO₃ --> Ca(ClO₃)₂ + 2 H₂O
How is the bent geometry related to the tetrahedral geometry?
Answer:
this shape is called bent or angular. a molecule with four electron groups around the central atom orients the four groups in the direction of a tetrahedron.if there are four atoms attached to these electron groups then the molecular shape is also tetrahedral.
Explanation:
Hope this helped Mark BRAINLEST!!!!!
Bent geometry related to the tetrahedral geometry because of;
The two lone pairs and the two bonds
Bent Geometry in chemistry simply means that a molecule forms a V-shape with two other lone pairs and 2 bonds in a non collinear arrangement.Example is water (H₂O). In this example Oxygen will form a V-shape with the 2 hydrogen molecules which are the lone pairs as well as two bonds for each of the hydrogen molecule.
Tetrahedral geometry is one in which there is a central atom surrounded by 4 isolated atoms that are bonded with the central atom to form a tetrahedral shape. A very good example is Methane(CH₄). In CH₄, Carbon will be the central atom and the four corner atoms bonding with Carbon will be the hydrogen atoms.In conclusion, the relationship between bent geometry and tetrahedral geometry is that they both have 2 bonds and 2 lone pairs.
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round 4,474 to the nearest thousands
Which sodium chloride solution has a molarity of 6.5M?
1-6.5 grams of sodium chloride dissolved in 1.0 L of water
2-6.5 mol of sodium chloride dissolved in 1.0 mol of water
3-52 moles of sodium chloride dissolved in 8.0 L of water
4-2.6 moles of sodium chloride dissolved in 4000 L of water
Answer:
2-6.5 mol of sodium chloride dissolved in 1.0 mol of water
Explanation:
I'm not sure, do a little research because I may be wrong
_Al(NO3)3 +_(NH4)3 P04_AlPO4+_ NH, NO3
balancing equations
Answer:
Al(NO₃)₃ + (NH₄)₃PO₄ —> AlPO₄ + 3NH₄NO₃
The coefficients are: 1, 1, 1, 3
Explanation:
__Al(NO₃)₃ + __(NH₄)₃PO₄ —> __AlPO₄ + __NH₄NO₃
The above equation can be balance as illustrated below:
Al(NO₃)₃ + (NH₄)₃PO₄ —> AlPO₄ + NH₄NO₃
There are 12 atoms of H on the left side and 4 atoms on the right side. It can be balance by writing 3 before NH₄NO₃ as shown below:
Al(NO₃)₃ + (NH₄)₃PO₄ —> AlPO₄ + 3NH₄NO₃
Now the equation is balanced.
The coefficients are: 1, 1, 1, 3
What volume of iron (blue/purple line) would have a mass equal to a piece of lead (red line) that has a volume of 3.0 mL?
A.
40 mL
B.
40 g
C.
4.9 g
D.
4.9 mL
I NEED HELP PLS
Answer:
4.3 g
Explanation:
Step 1: Given data
Volume of the piece of Pb: 3.0 mL
Step 2: Calculate the mass of the piece of Pb
The density of Pb is 11.35 g/mL.
3.0 mL × 11.35 g/mL = 34 g
We will look for the volume of a piece of Fe with a mass of 34 g.
Step 3: Calculate the volume of a piece of 34 g of Fe
The density of Fe is 7.87 g/mL.
34 g × 1 mL/7.87 g = 4.3 g
Which of the following most likely happens when the volume of a gas increases? (4 points)
Answer:
Molecules in the gas move faster due to the fact they have more energy
Explanation:
If you put more heat the higher the volume will be. Less heat means less volume.
(have a great day!)
Which front forms widespread clouds, rain, or snow?
Answer:
Warm front
Explanation:
Warm front forms widespread clouds, rain, or snow.
Answer:
Warm front
Explanation:
Just took the quiz
14) A wavelength of radiation has a frequency of 2.10 x 1014 Hz. What is the wavelength of this radiation in nm, and
determine the type of radiation.
Answer:
λ = 1.43 x 10³ meters (radio waves)
Explanation:
c = f·λ => λ = c/f
λ = wavelength = ?
f = frequency = 2.10 x 10¹⁴ Hz = 2.10 x 10¹⁴ cycles/sec
c = speed of light (vacuum) = 3.0 x 10⁸m/sec
λ = c/f = 3.0 x 10⁸m/sec / 2.10 x 10¹⁴sec⁻¹ = 1.43 x 10³ meters (radio waves)
The wavelength of this radiation in nm: is equal to 1430 nanometers.
Given the following data:
Frequency = [tex]2.10 \times 10^{14}[/tex] HzWe know that the speed of a radiation is equal to [tex]3.0 \times 10^8[/tex] meters.
To determine the wavelength of this radiation in nm:
Mathematically, the wavelength of a waveform is calculated by using the formula;
[tex]\lambda = \frac{v}{f}[/tex]
Where:
f is the frequency of a wave.v is the speed of light.Substituting the given parameters into the formula, we have;
[tex]\lambda = \frac{3.0 \times 10^8}{2.10 \times 10^{14}} \\\\\lambda = 1.43\times 10^{-6} \;meters[/tex]
In nanometer:
[tex]\lambda = 1.43 \times 10^{-6} \times 10^{9} \\\\\lambda =1430\;meters[/tex]
Wavelength = 1430 nanometers.
On the electromagnetic spectrum, the type of radiation with a wavelength of 1430 nanometers is an infrared radiation.
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In the picture below, two liquids are combined and a yellow
solid is formed. Which of these is the best evidence that a
chemical reaction occurs when the liquids are mixed?
Select one:
O
The density of one liquid is different from the other.
A new substance with different properties is formed.
O
Two substances are combined.
The volume of the beaker changes.
Answer:
A new substance with different properties is formed.
The previous part could be done without using the decay equation, because the ratio of original 14C14C to present 14C14C was an integer power of 1/2. Most problems are not so simple. To solve more general carbon-dating problems, you must first find the value of the decay constant for 14C14C, so that you can easily use the decay equation. Using the given half-life, 5730 yearsyears, find the value of the decay constant for 14C14C. Express your answer in inverse years to three significant figures. View Available Hint(s)
Answer: The decay constant for C14 is [tex]0.000121years^{-1}[/tex]
Explanation:
Expression for rate law for first order kinetics is given by:
[tex]t=\frac{2.303}{k}\log\frac{a}{a-x}[/tex]
where,
k = rate constant
t = age of sample
a = let initial amount of the reactant
a - x = amount left after decay process
for completion of half life:
Half life is the amount of time taken by a radioactive material to decay to half of its original value.
[tex]t_{\frac{1}{2}}=\frac{0.693}{k}[/tex]
[tex]k=\frac{0.693}{5730years}=0.000121years^{-1}[/tex]
The decay constant for C14 is [tex]0.000121years^{-1}[/tex]
What types of equipment would you need to make measurements in the chemistry laboratory?
Answer:
test tube
condenser
thermometer
beaker
watch glass
mortar
buret
The types of equipment needed for making measurements in the chemistry laboratory are the quantitative apparatus.
What are quantitative apparatus?
Quantitative apparatus like beakers help in mixing,heating and stirring the chemicals together.They come in variety of sizes which help in delivering different amount of chemicals from one apparatus to another. for example-volumetric flask,pipette
Volumetric flask is a kind of quantitative apparatus which helps in making standard solutions of different quantities. It come in different sizes of 50,100,250,500 ml.
Pipette is a kind of quantitative apparatus which helps in dispensing accurate volume of liquid from one apparatus to another.It also comes in varied sizes which used for dispensing different volumes of liquid.
Thus,by using quantitative apparatus in chemistry laboratories amount of substance present in a solution can be determined.
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A compound is found to contain 52.13 % carbon , 13.15 % hydrogen , and 34.72 % oxygen by mass.
To answer the question, enter the elements in the order presented above.
QUESTION 1:
The empirical formula for this compound is
QUESTION 2:
The molar mass for this compound is 46.08 g/mol.
The molecular formula for this compound is
Answer:
C2H60 & X2H60
Explanation:
Divide by the molar mass
Moles C= 53.13 g/ 12.011 g/mol =4.34
Moles H= 13.5 g/ 1.008 g/ mol= 13.4
Moles O= 34.72 g/ 15.999 g/ mol=2.170
Divide by the smallest
4.34 /2.17 =2 => C
13.4 / 2.17= 6=>H
2.170 / 2.17= 1=>O
The empirical formula is C2H60 (molar mass =46.08 g/mol)
X2H60 is also the molecular formula
A student studied the concept of order in the human body. Which
statement best summarizes how part of the human body is ordered?
1.cells are organized to form tissues
2. Tissues are organized to form cells.
3.organ systems work together to form tissues
4. Tissues work together to form organ systems.
5. Other
Answer:
1. cells are organized to form tissues
Explanation:
Cells are organized to form tissues is the statement best summarizes how part of the human body is ordered. Hence option 1 is correct.
What are cells?Cells are defined as the smallest component of living things, including biological tissues, that is capable of independent existence. The cell membrane, nucleus, and cytoplasm are the three major structural components of a cell. A cell's membrane, which encloses it and regulates what enters and leaves it, controls the flow of chemicals.
Organs are formed from tissues, which are composed of cells. Organ systems, such as the skeletal and muscular systems, are groups of organs. Cells, tissues, organs, and organ systems make up the several levels of organization in the human body. The human body, which is made up of countless billions of cells, is a marvel of structure and functionality.
Thus, cells are organized to form tissues is the statement best summarizes how part of the human body is ordered. Hence option 1 is correct.
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Tungsten and molybdenum both have the BCC crystal structure, and Mo forms a substitutional solid solution for all concentrations at room temperature. Compute the unit cell edge length for a 84 wt% W - 16 wt% Mo alloy. The room-temperature density and atomic weight of W are 19.3 g/cm3 and 183.85 g/mol, the room-temperature density and atomic weight of Mo are 10.22 g/cm3 and 95.94 g/mol, respectively.
Answer:
the unit cell edge length is 3.1585 × 10⁻⁸ cm
Explanation:
Given the data in the question;
density = 100 / [ (84/19.3) + (16/10.22) = 100 / 5.917889 = 16.8979 g/cm³
so Aug density p_aug = 16.8979 g/cm³
Aug Atomic weight = 100 / [ (84/183.85 ) + (16/95.94) = 100 / 0.623665
= 160.3424 g/mol
now
volume = ( no. of atoms in BCC × Aug Atomic weight) / ( Aug density × Avogadro's number)
we substitute
volume = ( 2 × 160.3424 ) / ( 16.8979 × 6.023 × 10²³ )
volume = 320.6848 / 1.017760517 × 10²⁵
volume = 3.15088 × 10⁻²³ cm³
Now, unit cell edge length will be;
= [tex]Volume^{1/3}[/tex]
= [tex](3.15088 * 10^{-23})^{1/3}[/tex]
= 3.1585 × 10⁻⁸ cm
Therefore, the unit cell edge length is 3.1585 × 10⁻⁸ cm
What Are the Answers.
Answer:
Yes
Explanation:
it is
A 32.4 L gas sample at STP is compressed to a volume of 28.4 L, and the temperature is increased to 352 K.
What is the new pressure of the gas in atmospheres? Answer: 1.47atm
How do I solve this?
Answer:
The new pressure of the gas is 1.47 atm.
Explanation:
STP in chemistry is the abbreviation for standard temperature and pressure. In this case the standard temperature is 273 K (0 ° Celsius or 32 ° Fahrenheit) and the standard pressure is 1 atm of pressure.
The equation that relates P, V, and T is called the ideal gas “law”. This law relates the variables in an initial state 1 and a final state 2 by the expression:
[tex]\frac{P1*V1}{T1} =\frac{P2*V2}{T2}[/tex]
In this case:
P1= 1 atmV1= 32.4 LT1= 273 KP2= ?V2= 28.4 LT2= 352 KReplacing:
[tex]\frac{1 atm*32.4 L}{273 K} =\frac{P2*28.4 L}{352 K}[/tex]
and solving you get:
[tex]P2=\frac{352 K}{28.4 L} \frac{1 atm*32.4 L}{273 K}[/tex]
P2= 1.47 atm
The new pressure of the gas is 1.47 atm.
You have a container which has the capacity to hold 3 L water. If it already has 2.25 L water in it, how much more water in mL can you still add to fill it completely?
Answer:
750mL
Explanation:
According to this question, a container which has the capacity to hold 3 L water already has 2.25 L water in it. This means that the container needs (3 - 2.25) = 0.75L to get filled up completely.
However, this question needs the volume of water needed to fill the container in milliliter (mL). To do this, we say;
1L = 1000mL
0.75L = 0.75 × 1000
= 750mL
Therefore, 750mL of water can still be added to fill up the container completely.