Answer:
You do as you wish, but it isn't a terrible idea.
Explanation:
Caffeine is a drug that has been normalized in society for a long time. But it's effects on the nervous, digestive, excretory, and circulatory systems are a good basis to start a project off of.
Cheers! (:
what is a molecular formula ?
Answer:
a formula giving the number of atoms of each of the elements present in one molecule of a specific compound.
Answer ; try to understand in the explanation
Explanation: Molecular Formula Definition: An expression which states the number and type of atoms present in a molecule of a substance. Examples: There are 6 C atoms and 14 H atoms in a hexane molecule, which has a molecular formula of C6H14.
Need the answer ASAP!!!
Select the correct answer.
A student puts a glass of water in the freezer. Later, he notices ice forming on the surface of the water. Which property of water best explains
why ice forms on its surface?
OA
Ice has more surface tension than liquid water,
OB.
Ice is less dense than liquid water.
OC.
Ice has a lower freezing point than liquid water.
OD
Ice is more cohesive than liquid water.
O E.
Ice can dissolve more oxygen than liquid water.
Answer:
The Ice is Less Dense than the Water
Explanation:
I just answered this one myself, and the explanation is also just that Ice isn't dense enough to sink.
The sun revolved around the earth why ? help me
Answer:
You are moving because the Earth and everything in our solar system is constantly moving. ... As the Earth rotates, it also moves, or revolves, around the Sun. The Earth's path around the Sun is called its orbit. It takes the Earth one year, or 365 1/4 days, to completely orbit the Sun.
Answer:
um lol i think you mean Why does the earth revolve around the sun
its because the that the gravity of the Sun keeps the earth in its orbit
Explanation:
hope this helps!
CO(g) + 3 H2(g) → CH4(k) + H2O(g) + heat
The sign of AH is
The sign of AS is
The sign of AG is negative a low or high temperature?
Explanation:
AH is negative because the reaction gives out heat (exothermic).
AS is negative because the total entropy of the reactants is greater than that of the products (there are 4 moles of gas on reactant side compared to only 1 mole on the product side). Thus, the reactants are said to be "messier" than the products.
AG is negative at lower temperatures because at low temperatures, -TAS is more negative, resulting in the negative sign of AG.
Hope this helps.
30. Which two notations represent atoms that are isotopes of the same
element?
A) 31 Sn and 30°Sn
B) 581 Sn and 13 Sn
C) 3°O and LOF
D) 19 Cl and 18K
Answer: 581 Sn and 13 Sn
Explanation:
581 Sn and 13 Sn are both Sn which are the same element with different masses. Isotopes are same element with different masses and the elements can have different masses because of different number of neurons
How or why does lead affect blood flow?
Answer:
lead causes vessels to constrict, limiting the space for blood to flow (compare the size of the red circles.) This narrowing increases blood pressure, forcing the heart to work harder.
Answer:
By mimicking calcium and increasing cell stress, lead causes vessels to constrict, limiting the space for blood to flow. This forces the heart to work harder because the narrowing increases blood pressure.
Which type of fuel can only be used in certain geographic areas?
A. Petroleum
B. Biomass
C. Nuclear
O D. Geothermal
The answer is D. geothermal
Answer:
D.
Explanation:
Follow me and I follow back you
Stay Safe
Answer: D Geothermal
Explanation:
Carbon (C): 1sH2sI2pJ
H=
I =
J =
Answer:
H =2; I = 2; J = 2
Explanation:
Carbon is element 6 in the Periodic Table.
Start at element 1 (H) and count from left to right until you reach element 6 (C).
You get the electron configuration
C: 1s² 2s²2p².
Thus,
H =2; I = 2; J = 2
Help a girl out, please!!!!!
Answer:
The answer will be Number C that is positively and part of the nucleus
Answer:
Part C best describes a proton, as it is positively charged and part on the nucleus
the total energy gain of the ice cube and the resulting liquid water is blank joules
Answer:
bro
Explanation:
bro
Answer: yes
Explanation:
Because of the mass
chemistry help best answer gets marked brainly
Answer:
C. The final substance in beaker A is a pure substance while in Beaker B is a mixture
Explanation:
A pure substance is a substance that contains a constant and definite proportion of a single substance. Elements and compounds are the two known pure substances while mixtures are substances of different compositions mixed together.
In this question, two beakers; A and B are said to contain different substances. Beaker A contains elemental sulfur (S) that forms a yellow powder while beaker B contains sand and water. From the explanation above, the final substance in beaker A is a pure substance (element) while in beaker B is a mixture of sand and water.
Which diagram shows a pair of electrons that have opposite spins?
O1
1
个个
Answer:
the answer is half arrow
list three common examples of solute
Answer:
sugar, salt, oxygen
Explanation:
hope these work
Answer:
Examples of solutes include sugar, salt, oxygen, etc. There are numerous examples of solutions. For example, milk (solvent) and sugar (solute) make sweet milk. Air is made up of gases (oxygen, nitrogen, carbon dioxide, etc.).
Explanation:
Based on the enthalpy changes given for the reactions, which reactions are endothermic?
Explanation:
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pa brainliest na din po thanks
If a speaker is moved from 2 feet away to 4 feet away, the volume of the sound will: half double quarter stay the same
Answer:
the volume of the sound will quarter
Explanation:
As you move far away from the source, the loudness of sound decreases. This is because as the distance from the source increases, the area it covers also increases thereby spreading the energy over a great area leading to lesser loudness and intensity.
As a result of this, sound intensity follows an inverse square law:
I ∝ 1/d²; where I is the intensity and d is the distance from source.
Therefore If a speaker is moved from 2 feet away to 4 feet away (increment of 2 feet), the volume of the sound would quarter (1/2² = 1/4)
Which equation represents natural transmutation?
A)238920 +23490Th + 42He
490Th
B)UFO + 6 Na →6 NaF + U
C) 2713A1 + 42He3015P+ lon
D) H2O + H+ + OH-
Answer:
answer is a
Explanation:
i hope this helps you
If I have 0.294L of a 2.OM NaOH solution, what will be the concentration if I add 1.824L to the solution?
Answer:
0.32M
Explanation:
Using the following formula;
CaVa = CbVb
Where;
Ca = concentration of acid (M)
Cb = concentration of bass (M)
Va = volume of acid (HCl)
Vb = volume of base (NaOH)
According to this question, the following were given:
Ca = ?
Cb = 2M
Va = 1.824L
Vb = 0.294L
Using CaVa = CbVb
Ca × 1.824 = 0.294 × 2
1.824Ca = 0.588
Ca = 0.588 ÷ 1.824
Ca = 0.32M
Given the reaction:
Ca + 2H,0→ Ca(OH)) + H2
How many moles of H,O are needed to exactly react with
2.0 moles of Ca
Answer:
4
Explanation:
because use the molar ratio of
ca:h2o
1:2
2;4
so u times it by 2 .
hope this helps:)
Why can you not create a Punnett square
to determine the height of an individual-
GIVE BRAINLIEST
Which property of water helps it maintain a relatively stable temperature?
The property of water that helps it maintain a relatively stable temperature is the presence of hydrogen bonds.
The properties of waterWater is an odourless, tasteless and colourless compound that is made up of hydrogen and oxygen atoms.
The properties of water include the following:
it is a polar solvent,it has high specific heat capacityHigh surface tension, andStable boiling and freezing points.The stable temperature of water, that is the ability to have a constant boiling and freezing points, is as a result of the hydrogen bonds existing between the water molecules.
The hydrogen bonds gives water molecules ability to hold heat better than any other substance.
Learn more about water properties here:
https://brainly.com/question/18681949
Answer: High specific heat capacity
Explanation:
I took the test
Match the parts of the nervous system with their functions.
cerebrum
brain stem
cerebellum
meninges
regulating breathing
memorizing a telephone number
dancing
protecting the central nervous system
Explain how to convert a mass of compound A to a mass of compound D in words using the following reaction:
2A + 4B = C + 3D
You don't have to just give me the answer but if you can help me understand id appreciate it greatly
Answer:
1. Convert the mass of A to moles dividing in molar mass
2. Convert the moles of A to moles of D (2mol A = 3mol D)
3. Convert the moles of D to mass multiplying by its molar mass
Explanation:
As you can see in the equation, 2moles of A produce 3 moles of D, the equation is:
2mol A = 3mol D
But in the problem you are having the mass of A and you need the mass of D. That means you require to convert the mass of A to moles. With the moles of A you can find the moles of D and, as last, you need to convert the moles of A to mass.
To convert mass to moles or vice versa you must use Molar Mass. That means, the answer is:
1. Convert the mass of A to moles dividing in molar mass2. Convert the moles of A to moles of D (2mol A = 3mol D)3. Convert the moles of D to mass multiplying by its molar masssodium reacts with chlorine gas to form sodium chloride. if you have 60 L of chlorine gas at STP and 30 g of sodium, how many grams of salt would be formed? i know the answer is 75 grams but i need to show my work and i don't know what to write for the equation
Answer:
75.9 grams of salt
Explanation:
The reaction is the following:
2Na(s) + Cl₂(g) → 2NaCl(s) (1)
We have:
m(Na): the mass of sodium = 30 g
V(Cl₂): the volume of the chlorine gas at STP = 60 L
So, to find the mass of NaCl we need to calculate the number of moles of Na and Cl₂.
[tex] n_{Na} = \frac{m}{A_{r}} = \frac{30 g}{22.99 g/mol} = 1.30 moles [/tex]
The number of moles of Cl₂ can be found by the Ideal gas law equation:
[tex] PV = n_{Cl_{2}}RT [/tex]
Where:
P: is the pressure = 1 atm (at STP)
R: is the gas constant = 0.082 L*atm/(K*mol)
T: is the temperature = 273 K (at STP)
[tex] n_{Cl_{2}} = \frac{PV}{RT} = \frac{1 atm*60 L}{0.082 L*atm/(K*mol)*273 K} = 2.68 moles [/tex]
Now we need to find the limiting reactant. From the stoichiometric relation between Na and Cl₂ (equation 1), we have that 2 moles of Na react with 1 mol of Cl₂, so:
[tex] n_{Na} = \frac{2 moles Na}{1 mol Cl_{2}}*2.68 moles Cl_{2} = 5.36 moles [/tex]
Since we have 1.30 moles of Na, the limiting reactant is Na.
Finally, we can find the number of moles of NaCl and its mass.
[tex] n_{NaCl} = n_{Na} = 1.30 moles [/tex]
[tex] m_{NaCl} = n_{NaCl}*M = 1.30 moles*58.44 g/mol = 75.9 g [/tex]
Therefore, would be formed 75.9 grams of salt.
I hope it helps you!
The volume of a gas at 5.00 ATM is 3.5 L what is the volume of the gas at 7.00 ATM at the same temperature
A- 2.5 L
B- 5.0 L
C- 10. L
D- 12 L
Answer:
B) 5.0L
Explanation:
Like the Ford F-150 V8 Cyote 5.0L engine
What does the prefix trans-indicate?
The carbons on either side of the double bond are pointed in opposite directions.
Where can we find what the chemical symbols in a compound mean? Example: 0, C, Na, Li
Answer:
The periodic table
Explanation:
I'm not really sure what your question is. . . I'm assuming this is what you're looking for
PLEASE HELP!!!
What are the products of a hydrogen fusion reaction?
A. Deuterium
B. Carbon-14
C. Plutonium and a neutron
D. Helium and a neutron
Answer:
b
Explanation:
Deuterium is the products of a hydrogen fusion reaction, the correct option is A.
What is hydrogen fusion?It is the situation in which two hydrogen atoms merge or coalesce to form a helium atom.
A portion of the hydrogen's mass is transformed into energy during the process.
The fusion reaction that abilities the Sun and stars occurs when hydrogen atoms merge to produce deuterium, and then deuterium and hydrogen atoms fuse to form helium, releasing energy.
Four Hydrogen nuclei (protons) combine to form a Helium nucleus in the basic Hydrogen fusion cycle.
Actually, electrons, neutrinos, and photons are involved in the hydrogen fusion into helium.
Since the total mass of the eventually results single nucleus is lower than the mass of the original two nuclei, the process releases energy.
Thus, the correct option for the given case is A.
For more details regarding hydrogen fusion reaction, visit:
https://brainly.com/question/12665881
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number 2 pls help me :):)
Answer:None of the tunes make a correct statement the third choice is closed but may still dating the pencil operates broken because the light been to a zoo from a straight line when it across the boundary between air and water
Explanation:
What does a particular point on a line of a phase diagram represent?
A. The melting point or boiling point of a substance at a specific
pressure
B. The maximum temperature a substance can exist at without
bonds breaking
C. The pressure created by the kinetic energy of molecules at a
particular temperature
D. The conditions in which temperature and pressure have equal
effects on a substance
Answer: A
Explanation:
the melting point or boiling point of a substance at a specific pressure
¿Cual es la sustancia que puede causar la muerte? (Estoy poniendo cualquier cosa para registrarme) 3
Answer:
Veneno.
Explicación:
El veneno es la sustancia que puede causar la muerte porque el veneno destruye las células que entran en contacto con el veneno. Si el veneno causa menos daño por lo que no ocurre la muerte del paciente mientras que por otro lado, si el veneno entra en contacto con los órganos vitales y causa más destrucción, el paciente eventualmente morirá, por lo que podemos decir que las sustancias tóxicas y venenosas causan daño y muerte. de la gente.
