Answer:
c
Explanation:
when measuring liquids you use liters
The acceptable method to directly measure volume using the metric system using a graduated cylinder to measure gallons. Thus, option C is correct.
What is proportion?The angles and relative measurements of a polished gem and the relationships between them are called proportion. Proportion is defined as equation in which two ratios are set equal to each other.
The relationship among the different things or parts with respect to comparative size, degree and number. There are several types of proportion and these are direct proportion, compound proportion, continued proportion, and inverse proportion.
Gravitational force is a force which act on objects which have a matter i.e a object which contains mass. Gravitational force is force which act between two objects which have a mass and both object are try to attract each other.
Therefore, The acceptable method to directly measure volume using the metric system using a graduated cylinder to measure gallons. Thus, option C is correct.
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Cuál es la importancia de una fórmula química y explique las clases de fórmulas con sus ejemplos respectivos.
Answer and Explanation:
Las fórmulas químicas sirven para conocer qué elementos químicos y en qué cantidad están presentes en un compuesto químico. Por ejemplo: la fórmula química del dióxido de carbono es CO₂. Esta fórmula nos indica que la molécula de dióxido de carbono está formada por 1 átomo del elemento químico carbono y 2 átomos del elemento oxígeno.
Los diferentes tipos de fórmulas químicas son: fórmula empírica, fórmula molecular, fórmula semi-desarrollada y fórmula desarrollada. Tomando como ejemplo al compuesto butano:
- Fórmula empírica: C₂H₅ (indica que hay 2 átomos de C por cada 5 átomos de H; es una fórmula mínima)
- Fórmula molecular: C₄H₁₀ (indica que en realidad cada molécula de butano tiene 4 átomos de C y 10 átomos de H).
- Fórmula semi-desarrollada: CH₃CH₂CH₂CH₃ (indica el órden en que se unen los átomos en la molécula).
-Fórmula desarrollada: ver dibujo adjunto (indica cómo están unidos los átomos dentro de la molécula. Ahora vemos los enlaces entre los átomos y que los 2 átomos de C de los extremos están unidos a 3 átomos de H y a otro C, y los dos átomos de C del medio están unidos cada uno a 2 C y 2 H).
Calcium reacts with oxygen to form calcium oxide. Name the
reactants.
You pour 25.0 mL of 6.70 M NaOH stock solution into your beaker. How much water will you have if it is diluted to 3.40 M
solution?
As time passes, which of these is decreasing?
es )
A)
amplitude
B)
crest
trough
D)
wavelength
Answer:
Wavelength (D)............
Answer:
A
Explanation:
the amplitude is measured from the dotted line to the top of the crest. Looking at the picture the amplitude gets smaller
Match the parts of the element box as is making a periodic table key
Answer:
10 is the atomic number
Ne is the chemical symbol
Neon is the element name
20 is the atomic mass
Light travels one million times faster than sound. How long would light take to travel from one hill to the other?
Answer:
ZOOM PLZ COME WE R BORED
MEETING ID 798 4170 2552
PASSWORD:XCNeV3
Explanation:
What is the chemical name of Ca3H2?
Answer:
it should be calcium hydrate
If 4.04g of h2 gas react with oxygen gas to create 36.36g of water, how many grams of oxygen reacted?
Answer:
gO₂ = 32.32 g
Explanation:
In this case, let's write the general equation:
2H₂ + O₂ -------> 2H₂O
In this case, we can use the 1° law, which is mass conservation. If the product has 36.36 g of water, then in the reactants we should have the same 36.36 g.
According to this, we already have 4.04 of hydrogen, then the remaining to reach the 36.36 g would be:
gO₂ = 36.36 - 4.04
gO₂ = 32.32 gHope this helps
If a substance has a half life of 58 years and starts with 500 g radioactive, how much remains radioactive after 30 years?
Answer:
A = 349 g.
Explanation:
Hello there!
In this case, since the radioactive decay kinetic model is based on the first-order kinetics whose integrated rate law is:
[tex]A=Ao*exp(-kt)[/tex]
We can firstly calculate the rate constant given the half-life as shown below:
[tex]k=\frac{ln(2)}{t_{1/2}} =\frac{ln(2)}{58year}=0.012year^{-1}[/tex]
Therefore, we can next plug in the rate constant, elapsed time and initial mass of the radioactive to obtain:
[tex]A=500g*exp(-0.012year^{-1} *30year)\\\\A=349g[/tex]
Regards!
A gas occupies 450. mL 3 atm. If its volume decreases to 0.200 L then what will its new pressure be?
Assume constant temperature and mass.
Show your work.
Answer:
6.75 sym.
Explanation:
Boyle's Law: The pressure of a gas in an enclosed container with a flexible volume is inversely proportional to the volume occupied by the gas.
Empirically => P ∝ 1/V => P = k(1/V) => k = P·V
For any conditions of Pressure & Volume, Pressure x Volume is a constant.
Therefore, k₁ = k₂ => P₁V₁ = P₂V₂ => V₂ = P₁V₁ / V₂
=> V₂ = (3atm)(0.450L)/(0.200L) = 6.75 atm.
URGENT PLEASE HELP ILL MARK BRAINLIST Please someone look at the graph and tell me how to fill in the blank like you don't need to do it jsut tell me how and I'll do it myself I jsut don't understand how the instructions are using your periodic table fill in the chart below to show how many elements combine ironically to form neutral compounds remebr that each compound needs to have a total charge of zero URGENT PLZ FOR.THE LOVE OF GOD PLEASE ANSWER THIS
Answer:
Filled below
Explanation:
#v.e means number of valence electrons.
Also, the column total v.e is gotten by adding the v.e of the metal to the v.e of the non metal based on the chemical formula of both of the 2 elements combined.
K: Cl: 5; KCl; 1 + 5 = 6
Be: S: 6; BeS; 2 + 6 = 8
Na: F: 7; NaF; 1 + 7 = 8
Mg: Se: MgSe; 2 + 6 = 8
Al; N; AlN; 1 + 5 = 6
Be; F; BeF2; 2 + 2(7) = 16
Mg; N; Mg3N2; 3(2) + 2(7) = 20
(I found this meme on Pinterest)
So what if when we get reincarnated on our tomb stone should we really write R.I.P or B.R.B?
lol don't report me my I asked my TEACHER this and she is wondering the same thing so this does effect me academically.
Raj is trying to make a diagram to show what he has learned about nuclear fusion.
1 H e atom plus Energy right arrow 2 H atoms plus Heat plus Pressure.
Is his diagram correct, and if not, how could he fix it?
Yes, he should leave it as is because one atom of He plus energy results in two atoms of H and heat and pressure.
No, he should place energy on the right and heat and pressure on the left.
No, he should place the He atom and energy on the right, and the H atoms and heat and pressure on the left.
No, he should place the He atom on the right and the H atoms on the left.
Answer:
hope it helps make brainlliest ty
Answer:
C: No, he should place the He atom and energy on the right, and the H atoms and heat and pressure on the left.
Explanation:
What is the pH of a solution with a 3.2 x 10−6 M hydronium ion concentration?
Answer:
5.49Explanation:
The pH of a solution can be found by using the formula
[tex]pH = - log ([ { H_3O}^{+}])[/tex]
H3O+ is the hydronium ion
From the question we have
[tex]pH = - log(3.2 \times {10}^{ - 6} ) \\ = 5.49485..[/tex]
We have the final answer as
5.49Hope this helps you
WILL GIVE BRAINLIEST!!
Answer:
Option b which is n equal to 3
Ordinarily, when we talk about green infrastructure, what type of public element are we most likely to be discussing?
1 parks abd open spaces
2 grocery stores
3 bridges
4highways
Wat two common uses for Cadmium
Answer:
Common (industrial) uses for cadmium today are in batteries, alloys, coatings (electroplating), solar cells, plastic stabilizers, and pigments
What is the amount of moles of NaOH, if the solution molarity is .33 M NaOH in 0.75 L solution
Answer:
The amount of moles of NaOH is 0.0495
Explanation:
Molarity is a measure of concentration that is defined as the number of moles of solute that are dissolved in a given volume.
In symbolic form molarity is presented as:
[tex]Molarity=\frac{number of moles of solute}{volume}[/tex]
Molarity is expressed in units [tex]\frac{moles}{liter}[/tex].
In this case:
Molarity= 0.33 MNumber of moles of solute= ?Volume= 0.75 LReplacing in the definition of molarity:
[tex]0.33 M=\frac{number of moles of solute}{0.75 L}[/tex]
number of moles of solute= 0.33 M* 0.75 L
number of moles of solute= 0.0495 moles
The amount of moles of NaOH is 0.0495
Answer:
0.248 moles of NaOH
Explanation:
Concept of Molarity is mol/L
[x] = 1 M
1 mol of x contained in 1 L of solution. We write molar concentrations between []
M = mol/L then M . L = mol
Our solution is NaOH
0.33 M . 0.75L = mol
This solution contains 0.248 moles of NaOH
What volume of hydrogen (in L) is produced
from the complete reaction of 3.143 moles of
hydrochloric acid at STP?
Answer:
35.20
Explanation:
I got it right when I answered it
I don't know how to get the volume and it is 10 point removed for it wrong so can someone help me
The anion sbf4− does not obey the octet rule. draw its lewis structure and state the type of octet-rule exception. indicate the values of nonzero formal charges and include lone pair electrons.
Answer:
SEE EXPLANATION
Explanation:
The ion SbF4^- is octahedral in shape. In this compound, Sb which is the central atom in SbF4^- has an expanded octet. This means that it has more than eight electrons in its outermost shell thereby violating the octet rule. Hence the type of violation to the octet rule shown by the compound is expanded octet.
The Sb central atom has a formal charge of -1 as shown in the image attached to this answer.
¿Cuál de las siguientes reacciones se encuentra CORRECTAMENTE balanceada?
A.
CH4+2O2→CO2+3H2O
B.
CH4+3O2→CO2+2H2O
C.
2KClO3→2KCl+3O2
D.
3KClO3→3KCl+2O2
Answer:
opción c es la respuesta correcta espero que te ayude
What are the products of the following neutralization reaction? (No need to balance)
H3PO4 + Ba(OH)2 --> ??? + ???
A.)H2O + Ba3(PO4)2
B.)H30+ + BaPO4
C.)H30+ + Ba3(PO4)2
D.)H2O + BaPO4
H3PO4 + Ba(OH)2 --> Ba3(PO4)2 + H2O
so, (A) H2O + Ba3(PO4)2 is your answer.
what factors contributed to the increase of in the human population?
Which 2 minerals can be scratched by a Diamond but NOT Quartz
Answer:
topaz and corundum
Explanation:
i know things
Determine the number of representative particles in each of the following:
(a) 0.294 mol silver
____ atoms
(b) 8.98 10-3 mol sodium chloride
____ formula units
(c) 23.3 mol carbon dioxide
____ molecules
(d) 0.310 mol nitrogen (N2)
____ molecules
Answer:
(a) 0.294 mol silver = [tex]1.770 * 10^{23}[/tex]
(b) 8.98 * 10-3 mol sodium chloride - [tex]5.407 *10^{23}[/tex]
(c) 23.3 mol carbon dioxide = [tex]1.403 * 10^{25}[/tex]
(d) 0.310 mol nitrogen (N2) = [tex]1.866 * 10^{23}[/tex]
Explanation:
In one mole there are [tex]6.022 * 10^{23}[/tex] atoms/molecules
(a) 0.294 mol silver = [tex]6.022 * 10^{23} * 0.294 = 1.770 * 10^{23}[/tex]
(b) 8.98 * 10-3 mol sodium chloride - [tex]5.407 *10^{23}[/tex]
(c) 23.3 mol carbon dioxide = [tex]23.3 * 6.022 * 10^{23} = 1.403 * 10^{25}[/tex]
(d) 0.310 mol nitrogen (N2) = [tex]0.310 * 6.022 * 10^{23} = 1.866 * 10^{23}[/tex]
LOOK im girl and i like this girl and I KNOW " she is gay" NO IM PAN so ya but do i ask out this girl?
Answer:
Do it if you feel like its your chance! Good luck!
Explanation:
20. Gabriel is determined to find the density of an unknown, irregularly shaped object. Using a digital scale to get the mass and the displacement method to get the volume, he records the following data: (6 points) Mass-19.37 g Initial volume-50.00 mL Final volume- 61.94 mL What is the density of the unknown object? PLEASE SHOW YOUR WORK!
Answer:
Density of irregular object = 1.62 g/mL
Explanation:
Density of a substance = mass of substance /volume of substance
Mass of substance as measured from the scale = 19.37 g
Volume of the object spins determined bynthe displacement method since itnis an irregular object. In this method, the object whose volume is required is immersed in a measuring cylinder containing a known volume of water. The new volume of water after the immersion of the object is recorded. The volume of the irregular object is then obtained by finding the difference between the final and initial volume of water. This is so because a solid immersed in a liquid will displace its own volume of the liquid.
Volume of irregular object = 61.94 mL - 50.0 mL = 11.94 mL
Density of irregular object = 19.37 g / 11.94 mL
Density of irregular object = 1.62 g/mL
How many grams of hydrogen gas are produced if 6 moles of hydrochloric acid reacts with 2 mole of Al?
Extra Content
6HCl(aq) + 2Al(s) → 2AlCl3(s) + 3H2(g)
six moles of hydrochloric acid reacts with two moles of aluminum to produce 2 moles of aluminum chloride plus 3 moles of hydrogen gas.
A.
4.65 grams
B.
3 grams
C.
66.06 grams
D.
6.06 grams
Answer:
I think A
Explanation:
Grams are the unit of weight or the mass that is the multiplication of the moles and the molar mass of the substance. The mass of hydrogen gas produced is 6.06 gm.
What is mass?Mass is calculated in grams by multiplying the number of moles of the substance and the molar mass of the given molecule or compound.
Given,
Moles (n) of hydrogen = 3 mol
Molar mass of dihydrogen = 2.007 g/mol
Mass is calculated as:
[tex]\begin{aligned} \rm Mass &= \rm moles \times molar\; mass\\\\&= 3 \times 2.007\\\\&= 6.06\; \rm gm\end{aligned}[/tex]
Therefore, option D. 6.06 gm is the mass of hydrogen gas.
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The FM station broadcasts traditional music at 102 MHz on your radio units for FM frequencies are given in MHz. Find the wave length of radio station in metres (m), nanometre(nm) and angstrom(Å).
Answer:
λ = 2.94 m (in meters)
λ = 2.94 x 10⁹ nm (in nanometers)
λ = 2.94 x 10¹⁰ A (in angstrom)
Explanation:
The wavelength of the radio station can be given as follows:
[tex]\lambda = \frac{c}{f}\\[/tex]
where,
λ = wavelength = ?
f = frequency = 102 MHz = 1.02 x 10⁸ Hz
c = speed of light = 3 x 10⁸ m/s
Therefore,
[tex]\lambda = \frac{3\ x\ 10^8\ m/s}{1.02\ x\ 10^8\ Hz}[/tex]
λ = 2.94 m (in meters)
λ = (2.94 m)(10⁹nm / 1 m)
λ = 2.94 x 10⁹ nm (in nanometers)
λ = (2.94 m)(10¹⁰ A / 1 m)
λ = 2.94 x 10¹⁰ A (in angstrom)