Answer:
Carbon
Explanation:
At room temperature20–22 °C (68–72 °F), nitrogen and oxygen are gases, while bromine is a liquid.
Which energy source is considered nonrenewable?
1) moving water
2) fossil fuel
3) wind
4) biomass
Answer:
Fossil fuel
Explanation:
Answer:
2
Explanation:
Nonrenewable energy resources include coal, natural gas, oil, and nuclear energy. Once these resources are used up, they cannot be replaced, which is a major problem for humanity as we are currently dependent on them to supply most of our energy needs.
Potassium hydroxide is partially soluble as shown by the
following reaction:
KOH(s) K+ (aq) + OH(aq)
What is the poH of a 3.32 x 10-5 M KOH solution?
pOH =
Your answer should be rounded to three significant figures. Do not Include
units in your answer.
Answer: 4.48 or 4.47
Answer is B
A metal conducts heat in a similar way to electricity so, as you touch it, it draws heat from your body and makes your hand feel cold.
Plastics don't have to conduct heat so they don't draw heat from your body as efficiently, that's why a piece of plastic feels
than a piece of metal even if it's at the same temperature.
A)
long-chain molecules; warmer
B)
free electrons, warmer
valence electrons; colder
D)
a crystalline lattice; colder
Which physical change is endothermic?
A.
CO2(g) → CO2(ℓ)
B.
CO2(g) → CO2(s)
C.
CO2(ℓ) → CO2(s)
Answer:
The correct answer is A
Explanation:
Endothermic is a reaction of which heat is provided to break down the reacted molecules
NO LINKS OR FILES
Using Ohm's Law and Watt's Law. write the formula to find each measurement
Wattage (Watts)
Resistance (Ohms)
Voltage (Volts)
and/or
Current (Amps)
and/or
Explanation:
Mathematically, Ohm's law is given by :
V = IR
Where
V is voltage
I is current
R is resistance
The electric power of an electrical appliance is given by:
P = VI
Wattage = VI
Resistance, [tex]R=\dfrac{V}{I}[/tex]
Current, [tex]I=\dfrac{V}{R}[/tex]
Hence, this is the required solution.
Is there a relationship between the locations of earthquake, volcanoes, and plate boundaries? If so, describe the relationship.
Answer:
and earthquake epicenters are related to tectonic plate boundaries. causes Earth's plates to move. Most volcanoes and earthquakes are caused by the motion and interaction of Earth's plates. The way Earth's plates interact at boundaries is an important factor in the locations of earthquakes and volcanoes
Explanation:
in calorimetry, energy is measured through heat transfer from one substance to another. Which of the following is NOT a method of heat transfer?
Answer:
Explanationconvection
:
In calorimetry, energy is measured through heat transfer from one substance to another. Convection is not the method of heat transfer.
What is a calorimeter?A calorimeter is a device used to measure the amount of heat involved in a chemical or physical process.
For example, when an exothermic reaction occurs in solution in a calorimeter, the heat produced by the reaction is absorbed by the solution, which increases its temperature.
One technique we can use to measure the amount of heat involved in a chemical or physical process is known as calorimetry.
Calorimetry is used to measure amounts of heat transferred to or from a substance.
To do so, the heat is exchanged with a calibrated object (calorimeter).
Heat loss due to conduction is prevented by placing the calorimeter box in a well-lagged vessel using wool or cork material.
Heat loss due to convection is prevented by placing a lid on the box.
Heat loss due to radiation is minimized by polishing the box in order to smoothen it.
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An atom has the following electron configuration 1s2s2sp63s23p64s2 How many valance electrons does this atom have?
Answer:
The electron configuration for this atom is Calcium, which has 2 valence electrons.
Explanation:
Following the periodic table and with the electron configuration, you will end up with calcium, which has 2 valence electrons. (Always follow the electron configuration from left to right! It begins at hydrogen, then to helium... and so on.)
1s2 -> He....
2s2 -> Be....
2p6 -> Ne...
3s2 -> Mg...
3p6 -> Ar...
4s2 -> Ca.
Hi can someone who know the answers tell me what it is and pls don't send me a link also don't send me the wrong answers if you don't know it's ok :)
Answer:
you diba ikaw ang nagpamalimali diba no
moles of H2O are needed to exactly react with 2.0 moles of Ca
Answer:
4
Explanation:
so first write the balance equation
Ca+2H2O---->Ca(OH)2 + H2
then use molar ratio of H2O and Ca
which is 2:1 so if there are 2 moles of ca there will be 4 moles as you times it by 2. like this
Ca:H2O
1:2
2:4
Hope this helps u understand:)
List and describe the four layers of the Earth.
Answer:
Crust- thinest layer; the part we live on
Mantle- just beneath the crust; consists of magma
Outer Core- liquid metal; super hot; thickest layer (i think)
Inner Core- solid metal; SUPER compressed; hottest layer
Find the hydroxide concentration of a LiOH soultion that has a pOH of 8.65.
[OH] = _____ (round to 2 decimal places)
Answer: i need help
Explanation:
This unbalanced equation represents a chemical reaction:
Pb(NO3)2 + Nal NaNO3 + PbI2
What is the coefficient for Nal once the equation is balanced?
Α. 1
B. 2
C. 3
D. 4
Answer:
2
Explanation:
Pb(NO3)2 + 2NaI 2NaNO3 + PbI2
To see the coefficients of NaI in the given reaction we need to balance the reaction first. The coefficient for Nal once the equation is balanced is 2. the correct option is option B.
What is balanced equation?Balanced equation is the one where the number of atoms of each species is same on reactant and product side. In balanced equation mass can neither be created nor be destroyed.
The unbalanced equation is
[tex]\rm Pb(NO_{3})_{2}+ Nal\rightarrow NaNO_{3} + PbI_{2}[/tex]
The atoms of Pb on reactant and product side is 1 so Pb is balanced.
The atoms of N is 2 on reactant and 1 on product side so balance it as
[tex]\rm Pb(NO_{3})_{2}+ Nal\rightarrow 2 NaNO_{3} + PbI_{2}[/tex]
The atoms of O is 6 on reactant and 6 on product side so it is balanced
The atoms of I is 1 on reactant and 2 on product side so balance it as
[tex]\rm Pb(NO_{3})_{2}+2 Nal\rightarrow 2NaNO_{3} + PbI_{2}[/tex]
The atoms of Na on reactant and product side is 2 so Na is balanced.
Now all the elements are balanced
Therefore, the coefficient for Nal once the equation is balanced is 2. the correct option is option B.
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- How much power does it take to lift a
1,000 N load 10 m in 20 s?
Answer:
"500 Joule/sec" is the right answer.
Explanation:
The given values are:
Force,
F = 1000 N
Velocity,
s = 10 m
Time,
t = 20 s
Now,
The power will be:
= [tex]\frac{Force\times Velocity}{Time}[/tex]
On putting the values, we get
= [tex]\frac{1000\times 10}{20}[/tex]
= [tex]\frac{10000}{20}[/tex]
= [tex]500 \ Joule/sec[/tex]
Can someone please check my answer?
yes correctly ☺️☺️
Explanation:
thank you ❣️
Four satellites are in orbit around the Earth. The heights of their four orbits
are identical. The masses of the four satellites are given in the table. For
which satellite is the gravitational pull of Earth the strongest?
1. True or False: Fungi are reproduced through the spread of spores.
O True
O False
Answer:
True
Explanation:
Fungi reproduce by spawning absurd amount of spores greatly increasing the survival rate of the fungi.
Answer:
true
Explanation:
A sample of nitrogen gas is at a temperature of 50 c and a pressure of 2 atm. If the volume of the sample remains constant and the pressure increases to 3.2 atm, what ist eh enw temperature of the nitrogen gas
Answer:
The new temperature of the nitrogen gas is 516.8 K or 243.8 C.
Explanation:
Gay-Lussac's law indicates that, as long as the volume of the container containing the gas is constant, as the temperature increases, the gas molecules move faster. Then the number of collisions with the walls increases, that is, the pressure increases. That is, the pressure of the gas is directly proportional to its temperature.
Gay-Lussac's law can be expressed mathematically as follows:
[tex]\frac{P}{T} =k[/tex]
Where P = pressure, T = temperature, K = Constant
You want to study two different states, an initial state and a final state. You have a gas that is at a pressure P1 and at a temperature T1 at the beginning of the experiment. By varying the temperature to a new value T2, then the pressure will change to P2, and the following will be fulfilled:
[tex]\frac{P1}{T1} =\frac{P2}{T2}[/tex]
In this case:
P1= 2 atmT1= 50 C= 323 K (being 0 C= 273 K)P2= 3.2 atmT2= ?Replacing:
[tex]\frac{2 atm}{323 K} =\frac{3.2 atm}{T2}[/tex]
Solving:
[tex]T2*\frac{2 atm}{323 K} =3.2 atm[/tex]
[tex]T2=3.2 atm*\frac{323 K}{2 atm}[/tex]
T2= 516.8 K= 243.8 C
The new temperature of the nitrogen gas is 516.8 K or 243.8 C.
What is one service humans receive from the environment AND one-way humans disrupt ecosystems? (These need to be related!)
Answer:
Land-use change: Humans may destroy natural landscapes as they mine resources and urbanize areas. This is detrimental, as it displaces residing species, reducing available habitats and food sources. ... This can negatively effect an ecosystem because the introduced species may outcompete native organisms and displace them.
Explanation:
11A) As electrical energy is converted into heat energy, the total amount of energy in the system
pls help me out !
Answer:
b. option Is the correct answer
Brakes are to a car as
to a nuclear-fission chain reaction.
A. fuel rods are
B. proliferation is
C. free neutrons are
D. control rods are
Answer:
D. control rods are
I hope dis helps :3
Brakers are to a car as control rods are to a nuclear-fission chain reaction. The correct option is D.
What is a nuclear-fission chain?A chain reaction occurs when neutrons generated during fission cause subsequent fission in at least one more nucleus.
This nucleus creates neutrons, and the cycle continues.
The process can be either controlled (nuclear power) or uncontrolled (nuclear weapons) (nuclear weapons).
Thus, the correct option is D. control rods are.
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Given the equation below, determine the number of moles O2 required to completely react with 28 moles of CO.
Answer:
14 moles of O₂
Explanation:
The reaction between CO and O₂ is the following:
CO + O₂ → CO₂
We balance the equation with a coefficient 2 in CO and CO₂ to obtain the same number of O atoms:
2CO + O₂ → 2CO₂
As we can see from the balanced equation, 1 mol of O₂ is required to react with 2 moles of CO. Thus, the conversion factor is 1 mol of O₂/2 mol CO. We multiply the moles of CO by the conversion factor to calculate the moles of O₂ that are required:
28 mol CO x 1 mol of O₂/2 mol CO = 14 mol O₂
What were some of the causes of the Amu Darya and Syr Darya rivers being ruined?
urban sewer drainage
tannery dumping
tourism
drying up
agricultural chemicals
Answer:
drying up
agricultural chemicals
Explanation:
1. If 80.0 ml of 3.00 M HCl is used to make a 100. ml of dilute acid, what is the molarity
of new dilute HCl solution?
We are given:
M1 = 3 Molar V1 = 80 mL
M2 = x Molar V2 = 100 mL
Finding the molarity:
We know that:
M₁V₁ = M₂V₂
where V can be in any units
(3)(80) = (x)(100)
x = 240/100 [dividing both sides by 100]
x = 2.4 Molar
In steps 3 and 4 of the citric acid cycle, successive oxidations produce ________ as a waste product and the four-carbon carrier ________. In steps 3 and 4 of the citric acid cycle, successive oxidations produce ________ as a waste product and the four-carbon carrier ________. CO2; malate CO2; succinyl-SCoA ADP; oxaloacetate ADP; succinyl-SCoA CO2; oxaloacetate
Answer:
CO2; succinyl-SCoA
Explanation:
Citric acid cycle, also called Krebs cycle is the second stage of aerobic cellular respiration, which occurs in the mitochondrion. The kreb's cycle is made up of 7 distinct steps, with each involving series of enzymatic reactions.
According to this question, step 3 and 4 of the citric acid cycle involves an oxidation and decarboxylation reaction to produce 2 molecules of carbon dioxide (CO2) and a 4-carbon compound called succinyl group. A coenzyme A binds to the succinyl group to form succinyl-SCoA.
WILL GIVE BRAINLIEST!
__ gain electrons in the formation of ionic bonds because they have such high ionization energies indicating a strong attraction between the electrons and the nucleus.
A- metals
B- nonmetals
Answer:
A-Metals
Explanation:
because they have valence electrons
Which form of emission is commonly not written in nuclear equations because they do not affect charges, atomic numbers, or mass numbers?
alpha particle
beta particle
gamma ray
Answer: It is Gamma ray
Answer:
C. gamma ray
(Photo for proof at the bottom.)
Explanation:
A gamma ray is a type of radiation that occurs when an unstable nucleus emits a photon, the smallest unit of light. A photon has no mass or charge. Atomic and mass numbers are written based on the mass of the atom. But since no mass is lost when a photon is emitted, writing the emission of it isn't necessary.
Here's a photo of Edge, good luck.
A series of logical steps that is followed in order to solve a problem is called the *
1 point
A. experimental process.
B. scientific theory.
D. scientific method
D. model method
Answer:
YUNG PANGATLO LETER D.
Explanation:
YUN ANG SAGUT :>
Answer:
C. Scientific method
Explanation:
we did this in my middle school and this was the only method we were allowed to use to solve problems or questions we had.
The mole fraction of helium in a saturated solution at 0°C is 1.2 x 10–6. Find the pressure of helium above the solution. Henry's law constant is 6.8 x 10–6 atm–1
Answer:
[tex]P=5.67atm[/tex]
Explanation:
Hello there!
In this case, since the Henry's law is shown below:
[tex]P=H/x[/tex]
Whereas x is the mole fraction, H the Henry's constant and P the pressure. In such a way, we plug in the aforementioned first two to obtain the corresponding pressure:
[tex]P=\frac{6.8 x 10^{-6} atm^{-1}}{1.2 x 10^{-6}} \\\\P=5.67atm[/tex]
Regards!
How do gas particles respond to an increase in volume?
When the volume of a gas is increased, the gas particles respond by spreading out and occupying a larger space. This results in a decrease in the density of the gas and a decrease in the frequency of collisions between the gas particles.
How do gas particles respond to an increase in volume?As the gas particles spread out, the pressure exerted by the gas decreases.
This is because the pressure of a gas is directly proportional to the number of collisions per unit area of the container walls. When the volume increases, the same number of gas particles are distributed over a larger area, reducing the frequency of collisions and thus decreasing the pressure.
In summary, an increase in volume causes gas particles to spread out, resulting in a decrease in density and a decrease in pressure.
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