Answer:
magnesium
Explanation:
Which 2 statements best describe the effects of ocean currents on weather?
A. Warm currents cause the air above them to take up less moisture than cold currents do.
B. Cold currents are cold because they absorb thermal energy from the air above them.
C. Warm currents warm the air above them.
D. Cold currents remove thermal energy from the air above them.
This is due today please help me!
Answer:
C and D
Explanation:
A is false because the warmer the current is, the more likely the moisture is to become airborne.
B is false because if the currents were absorbing thermal energy from the air above them, they would actually start to heat up rather than cool.
Determine the number of moles of 35.4 grams of Magnesium.
Answer:
1.46 moles
Explanation:
You need to multiply 35.4g by Magnesium's molar mass.
Molar mass =1 mole/24.305g
(35.4g)(1 mole Mg/24.305g)= 1.46 moles <- rounded to 3 significant figures
As you can see, grams cancel out and you're left with moles.
Help plz (will mark brainleist)
Answer:
energy disturbance easy
What is the relationship between the masses of protons and
electrons?
Answer:
Proton, stable subatomic particle that has a positive charge equal in magnitude to a unit of electron charge and a rest mass of 1.67262 × 10−27 kg, which is 1,836 times the mass of an electron.
Explanation:
Is uranium a mixture or pure substance
Answer: is a pure substance
Explanation:
What is the volume, in liters, of 1.40 mol of oxygen gas at 20.0°C and 0.974 atm?
Answer:
V = 34.55 L
Explanation:
Given that,
No of moles, n = 1.4
Temperature, T = 20°C = 20 + 273 = 293 K
Pressure, P = 0.974 atm
We need to find the volume of the gas. It can be calculated using Ideal gas equation which is :
PV=nRT
R is gas constant, [tex]R=0.08206\ L-atm/mol-K[/tex]
Finding for V,
[tex]V=\dfrac{nRT}{P}\\\\V=\dfrac{1.4\times 0.08206\times 293}{0.974 }\\\\V=34.55\ L[/tex]
So, the volume of the gas is 34.55 L.
Which of these is the standard force unit in the metric system? A) joule B) pound C) newton D) kilogram
Answer:
C
Explanation:
Newton was the only force unit in the list
In a sample of 400 lithium atoms, it is found that 30 atoms are lithium-6 (6.015 amu) and
370 atoms are lithium-7 (7.016 amu). What is the average atomic mass?
Answer:
667.3
Explanation:
Which of the following elements has the largest electronegativity? A) Bismuth B) Nitrogen C) Potassium D) Arsenic
*URGENT ILL RATE YOU BRAINLIEST ASWELL* What is the volume of a rectangular prism with a length of 10cm, width of 2cm and a height of 8 cm?
Remember: V = length x width x height
Answer:
160 cm
Explanation:
since you said that v=l x w x h
then you will only have to multiply all of them, 10cm x 2 cm x 8cm, and the answer is 160 cm
Through what process is heat transferred between the warmpair in front of a
fireplace and the cooler air on the other side of the room?
A. Radiation
B. Conduction
C. Convection
D. Absorption
Answer:
c-convection
Explanation:
i think it may help you and if its helpful plzz mark as brilliant
6. Why does an atom have no net electric charge?
A. Its subatomic particles carry no electric charges.
B. The positively charged protons cancel out the
negatively charged neutrons.
C. The positively charged neutrons cancel out the
negatively charged electrons.
D. The positively charged protons cancel out the
negatively charged electrons.
Answer:
the positively protons cancel oit the negatively charged neutrons
Considering the definition of atom, the correct answer is option D. The positively charged protons cancel out the negatively charged electrons.
The atoms that are present in all bodies are made up of electrons, protons, and neutrons. All three have mass, but only the electron and the proton have charge. The electron has a negative charge, and the proton has a positive charge.
Protons and neutrons reside together in the nucleus of the atom. The electrons are attracted to the protons of the nucleus by the force that exists between particles with opposite electrical charge.
A neutral atom is one that lacks an electric charge due to a compensation between the number of its protons and electrons, that is, they have the same number of protons and electrons, since the total of positive charges of the protons cancels the total of charges. negative electrons.
Finally, the correct answer is option D. The positively charged protons cancel out the negatively charged electrons.
Learn more:
https://brainly.com/question/18534005?referrer=searchResultshttps://brainly.com/question/17988604?referrer=searchResultshttps://brainly.com/question/13392184?referrer=searchResultshttps://brainly.com/question/7221719IUPAC name for C3H7
Answer:
propyl
Explanation:
......:)
..;) .........
#7- pls help me ill mark you brainliest and ill give you 5 stars <3
Answer:
I think it is synthesis
Answer:
The answer is Synthesis
Explanation:
The two objects combine to make a bigger object
I’ll give the Brainliest, you also need to explain how the answer you got is correct.
Choose the best description of a neap tide.
A. Neap tides produce during the highest tides of the month.
B. Neap tides happen during winter and summer.
C. Neap tides could be described as low high tides and high low tides.
D. A neap tide is the period halfway between tides when the tide changes direction.
Thank you!
Answer:
D. A neap tide is the period halfway between tides when the tide changes direction. (correction) Answer : C
Explanation:
Process of elimination can be used. First off, A is incorrect because neap tides have the smallest tidal range ; spring tides would fit this choice. B is incorrect since neap tides are specific to the first, and third quarter moons when the sun and moon are right angles. C is wrong because it is the other way around since high tides are a little higher than average and low tides are a little lower than average (correction) this is correct since higher low tides and lower high tides are closer together and have a smaller tidal range than standard tides(spring tides) with higher high tides, and lower low tides. D is correct because they occur halfway between the spring tides (correction): incorrect since a neap tides occur around a week(7 days) after a spring tide(moderate tides). There is no evidence this is true.
There are three patterns: diurnal(one high and low tides a day), semidiurnal(two high and low tides a day), and mixed(two high and low tides a day of different lengths).
The spring and neap tides are the types of tides involved with the low and high tides.
How should this combustion reaction be balanced?
C5H8+O2 + CO2 + H20
The balanced combustion reaction is C₅H₈ + 7O₂ → 5CO₂ + 4H₂O
Hence, Option (B) is correct answer.
What is Combustion reaction ?Combustion reaction is a type of chemical reaction between the hydrocarbon and oxygen.
CₓHₙ + O₂ → H₂O + CO₂
What is Balanced Chemical Equation ?The balanced chemical equation is the equation in which the number of atoms on the reactant side is equal to the number of atoms on the product side in an equation.
The given reaction is C₅H₈ + O₂ → CO₂ + H₂O
Now we have to balanced this reaction
Reactant side Product side
C = 5 C = 1
H = 8 H = 2
O = 2 O = 3
In the reactant side there are 5 C atoms and in product side there are 1 C atom. Multiply by 5 in the product side.
C₅H₈ + O₂ → 5CO₂ + H₂O
Reactant side Product side
C = 5 C = 5
H = 8 H = 2
O = 2 O = 11
In the reactant side there are 8 H atoms and in product side there are 2 H atoms. Multiply by 4 in the product side.
C₅H₈ + O₂ → 5CO₂ + 4H₂O
Reactant side Product side
C = 5 C = 5
H = 8 H = 8
O = 2 O = 14
In the reactant side there are 2 O atoms and in product side there are 14 O atoms. Multiply by 7 in the product side.
C₅H₈ + 7O₂ → 5CO₂ + 4H₂O
Reactant side Product side
C = 5 C = 5
H = 8 H = 8
O = 14 O = 14
Now the equation is balanced all the atoms of reactant side and product side are same.
Thus from above conclusion we can say that The balanced combustion reaction is C₅H₈ + 7O₂ → 5CO₂ + 4H₂O
Hence, Option (B) is correct answer.
Learn more about the Balanced equation here: brainly.com/question/26694427
#SPJ2
Calculate the energy of a photon with a frequency of 2.36 x 10-19 Hz.
Answer:
Explanation:
energy for photon is calculated in same wasy as for electromagnetic radiation
energy for electromagnetic radiation = hf
where f is the frequency of photon
h is Planck's constant = h = 4.14 × 10−15 eV · s.
thus
energy of photon = 4.14 × 10−15 eV · s * 2.36 x 10-19 Hz
energy of photon = 9.77 * 10−(-15+ -19) eV
energy of photon = 9.77 * 10−34eV answer
List 50 Laboratory Apparatus used in
CHEMISTRY
1: safety goggles
2: beakers
3: test tubes
4: tongs
5: racks 6: watch glasses
7: crucible
8: funnels
9: graduated cylinder
10: volumetric flask
11: droppers 12: pipette
13: ring stand
14: rings
15: clamps
16: tongs
17: forceps
18: spatulas scoopulas
19: thermometer
20: Bunsen burner
21: balance
22: Florence flask
23: conical flask
Describe the difference between balanced forces and unbalanced forces.
Answer:
If two individual forces are of equal magnitude and opposite direction, then the forces are said to be balanced. An object is said to be acted upon by an unbalanced force only when there is an individual force that is not being balanced by a force of equal magnitude and in the opposite direction.
an endothermic animal is warm blooded. This means it can do what
Answer:
Endothermic animals are those that must generate their own heat to maintain an optimal body temperature.
Explanation:
Answer:
There
Explanation:
Endothermic animals are those that must generate their own heat to maintain an optimal body temperature. In ordinary language, these animals are commonly referred to as "warm-blooded." The term endotherm comes from the Greek endon, meaning within, and thermos, which means heat
1. Explain the relationship
between Polaris and Earth's tilt
Answer:
that it i think
Explanation:
the earth revolves around the Sun once each year and spins on its axis of rotation once each day. This axis of rotation is tilted 23.5 degrees relative to its plane of orbit around the Sun. The axis of rotation is pointed toward Polaris the North Star. As the Earth orbits the Sun the tilt of Earth’s axis stays lined up with the North Star.
Which of the following happens to the particles when the temperature of liquid water drops?
Explanation:
when water is in liquid form and the temperature DROPS it becomes solid ice the process is melting , freezing and evaporation this goes in a circle
The heat required to raise the temperature of 12g of water from 16 C to 21 C is:
a) 60 J
b) 60 cal
c) 50 cal
d) 50 J
Answer:
The heat required to raise the temperature of 12g of water from 16 C to 21 C is 60 cal.
Explanation:
Calorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
There is a direct proportional relationship between heat and temperature. The constant of proportionality depends on the substance that constitutes the body as on its mass, and is the product of the specific heat by the mass of the body. So, the equation that allows calculating heat exchanges is:
Q = c * m * ΔT
where Q is the heat exchanged by a body of mass m, made up of a specific heat substance c and where ΔT is the temperature variation.
In this case, you know:
Q=?c= 4.186 [tex]\frac{J}{g*C}[/tex]m= 12 gΔT=Tfinal - Tinitial= 21 °C - 16°C= 5 °CReplacing:
Q= 4.186 [tex]\frac{J}{g*C}[/tex] *12 g *5 °C
Solving:
Q=251.16 J
Since 1 J is equal to 0.2388 cal, then the following rule of three can be applied: if 1 J is equal to 0.2388 cal, then 251.16 J to how many cal are?
[tex]cal=\frac{251.16 J * 0.2388 cal}{1 J}[/tex]
cal= 59.98 ≅ 60
The heat required to raise the temperature of 12g of water from 16 C to 21 C is 60 cal.
The calorimeter measures the transferred heat of the system. 60 cal is heat is required to raise the temperature of water from 16 to 21 degrees celsius.
What is heat?Heat is the product of the mass, specific heat, and the change in the temperature of the system.
Heat exchanged by the system is calculated as:
[tex]\rm Q = \rm m c \Delta T[/tex]
Where,
Mass (m) = 12 g
Specific heat (c) = 4.186
Change in temperature = 5 degrees celsius
Substituting values in the equation:
[tex]\begin{aligned} \rm Q &= 12 \times 4.186 \times 5\\\\&= 251.16 \;\rm J\end{aligned}[/tex]
Converting joules into cal:
[tex]251.16 \times 0.2388 \;\rm cal = 60 \;\rm cal[/tex]
Therefore, the heat required is option b) 60 cal.
Learn more about the heat here:
https://brainly.com/question/13507243
convert the following
A runner completes a 400m race in 43.9s. What is his average speed?
Answer:
average speed around 9.1 meters/second
Explanation:
400 divided by 43.9
What components does the solar system appear to have formed from?
Answer:
I would say a dense cloud of interstellar gas and dust.
1. Compare the masses and the charges for the three particles which make
up
the atom.
Answer:
The charge on a neutron=1+-/neutral
It has a mass 1
The charge on electron is 1-/negative
It's mass is 1/1840
The charge on a proton is 1+
It has a mass 1 too.
Explanation:
what is potiential and kinetic engergy? pls someone answer my question
Answer:
Potential Energy is stored energy or energy of position (gravitational). The object isn't moving. For example, a ball being held is potential energy because the object isn't moving but it has the potential of turning into kinetic energy.
Kinetic Energy is the energy of motion. For example, running. You are moving, and there is clear action and activity
Energy stored in an object due to its position is Potiential energy . Energy that is moving object has due to its motion is Kinetic energy .
Define cation and anion. In which case are electrons gained? Lost?
Explanation:
A cation is a positively charged ion.
An anion is a negatively charged ion.
In a cation, electrons are usually lostIn an anion, electrons are usually gained.In an atom, the balance between the number of protons and electrons determine whether they become an anion or cation.
Protons are positively charged particles.
Electrons are negatively charged
When an atom gains electrons, the number of electrons becomes more than that of protons. This leaves a net negative charge on the atom and it makes an anion.
When an atom loses electrons, the number of protons becomes more than that of electrons. This leaves a net positive charge on the atom and makes a cation.
What’s science in science
Answer:
Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence. Scientific methodology includes the following: Objective observation: Measurement and data (possibly although not necessarily using mathematics as a tool)
Explanation:
Answer:
Modern science is typically divided into three major branches that consist of the natural sciences (e.g., biology, chemistry, and physics), which study nature in the broadest sense; the social sciences (e.g., economics, psychology, and sociology), which study individuals and societies; and the formal sciences