Answer:
True
Explanation:
Here is an example: chemical properties include flammability, toxicity, acidity, reactivity. we observe the changes of these properties. Therefore, It's true.
(Please Help Im blowing most of my points for this)
In earthquake-prone areas, engineers design buildings that are resistant to earthquake damage. Here’s a diagram of an earthquake-resistant building in Japan. Explain how features A, B, and C help protect the building from earthquake damage. In your explanation, describe how you could model each feature using marshmallows and toothpicks.
Answer:
In this earthquake-resistant building, two steel supports in the shape of an X (A) help to reinforce walls. Concrete walls with steel bars in them (B) lessen any rocking movements. Shock absorbers (C) take up some of the building’s kinetic energy during a quake. I could use the toothpicks as the two steel in the shape of an X. The concrete walls and the shock absorbers would be the marshmallows.
Features shown by points A, B & C are reinforce walls, concrete walls and shock absorbers respectively.
What is earthquake?Earthquake is a kind of natural disaster in which an intense shaing of the earth's outermost layer takes place.
According to the image following points we will consider as:
Two steel supports in the shape of an X (A) help to reinforce walls in this earthquake-resistant structure.Any rocking movements are reduced by concrete walls with steel bars (B).During a quake, shock absorbers (C) absorb some of the kinetic energy of the building.We can use the toothpicks in the shape of X as the two steel and concrete walls & the shock absorbers as the marshmallows.
Hence, marshmallows are used as the concrete walls and toothpicks are used as two steel rods.
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How much so you can be dissolved and 50 mL of water at 30 Celsius see chart:)
Answer:
The correct answer is - 100 grams.
Explanation:
The solubility graph is a very useful tool because it tells you the amount of solute that can be dissolved per 100 mL of water in order to have a saturated solution of potassium nitrate at a given temperature.
In order to find the solubility of the salt at 30 ∘ C , start from the 30 ∘ C
mark on the graph and move up until you intersect the curve. At the point of intersection, move left until you intersect the y axis and read off the value that you land on which is 200. However, it is for 100 ml so half the value you read:
200/2 = 100 gram .
So, solubility ≈ 100 g / 50 mL water
So, a saturated solution of solute will hold about 100 g of dissolved solute, that is of dissociated solute, per 50 mL of water at 30 ∘ C .
Can a molecular formula ever be the same as an empirical formula? Explain your answer.
Answer:
The molecular formula for a compound can be the same as or a multiple of the compound's empirical formula. Molecular formulas are compact and easy to communicate; however, they lack the information about bonding and atomic arrangement that is provided in a structural formula.
Explanation:
Answer: Hello Luv......
Hope this helps. Please mark me brainest... Anna ♥
Explanation:
The molecular formula for a compound can be the same as or a multiple of the compound's empirical formula. Molecular formulas are compact and easy to communicate; however, they lack the information about bonding and atomic arrangement that is provided in a structural formula.
In which period is an element that has the electron configuration 152 252
2p6 352 3p6 3d10 452 4p1 ? *
Period 4
Period 1
Period 2
Period 3
Answer:
Period 4
Explanation:
Given the electronic configuration of the element;
= Is² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p¹
The period of the element is determined by the highest coefficient in the electronic configuration.
For this given configuration (Is² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p¹), "4" is the highest coefficient and the element will certainly belong to period 4 in the periodic table.
To test if the prediction is correct:
Total number of electrons in the given element = 2+2+6+2+6+10+2+1 = 31
The element with atomic number of 31 = Gallium (Ga). (This element belong to period 4).
Under similar conditions, which gas diffuses most rapidly through a small
opening?
a. Methane, CH4
b. Carbon dioxide
C. Sulfur dioxide
d. Oxygen
e. Chlorine
Answer:
e
Explanation:
a
Conclusion:
sports
I am researching something and I need your (Brainly's) opinion
Based on your opinion, Do you think social media is bad? you don't have to but tell me why
Answer:
I think it could be bad for some people because children could be exposed to toxic content. Without parent restrictions there could be some serious harm. Another reason, is that being on social media could distract kids from homework, chores, etc. (There is also scams and fake advertising)
I personally deleted a lot of my social media acc’s last year cause of me getting stressed and sad over it, but for now I’m pretty good I’m making friends off it having lots of fun
Explain how the digestive/excretory system is similar to a recycling center
Answer:
The digestive system is a system where our body breaks down food to acquire important nutrients. This is the same as your local recycling center because they collect and breaks the plastic down to be reused into recycled products.
The excretory system is a system where we remove excess unnecessary materials. This can be the same as the recycling center because they remove unnecessary materials (such as trash that is not meant to be recycled).
What are the bronsted lowry acids in the following equilibrium reaction CN+H2O
Answer:
dbdbdbdjdbdjdb zbdjdjdjdirfjfjrjdudhdhdhd
A sheet of muscles called the diaphragm seals the bottom of this cavity true or false?<br />
The blood transports the oxygen to every cell in the body true or false?<br />
The cells need carbon dioxide to release energy true or false?<br />
Carbon Dioxide is a waste product of respiration true or false?<br />
Water is needed in the cells for respiration to occur true or false?<br />
Glucose is made during the respiration true or false?<br />
Respiration does not happen in the cells when we sleep true or false?<br />
Air enters the body through the nose and mouth, and passes into the wind pipe of the trachea true or false?
Answer:
1. False. White blood cells do.
2. False. Every seven years your cells are in the process of dying and being replaced. Although some cells don't die but your cells don't last for more than a period of 7 years.
3. True.
4. True.
5. False.
Explanation:
9. The verb corrode means 'wear away gradually, usually by a chemical reaction." A metal
that is prized for its "resistance to corrosion" has what property?
A metal that is prized for its resistance to corrosion has what property?
Answer:
The metal has a high resistance to corrosion, meaning it is more durable and will nor rust easily.
Explanation:
The verb "corrode" means the condition of being damaged easily. In other words, it means that the metal or item gets worn out easily and is not long-lasting.
So, when metal is prized for its resistance against corrosion, it means that the metal is strong and does not wear out easily. It can outstand and withheld the corrosion effect longer. This means that the metal is durable and will not corrode easily.
pls help help help!
i give 20 points
pls
Answer:
His name is Harold
Explanation:
2.5 liters of gas is stored at a pressure of 100 atm, if the volume were increased to 4 liters, what would be the new pressure?
a. 250 atm
b. 1000 atm
c. 62.5 atm
d. 160 atm
Answer:
62. 5
Explanation:
Use P1V1=P2V2
100 × 2.5 =250 /4=62.5
justin noticed several cracks in the sidewalk. Weeds are growing through them, cause the crack to expand. What process is this?
Answer:
Explanation:
Weeds and Small Plant Roots Exploit Existing Concrete Cracks
Instead, the plant's roots take advantage of existing microscopic cracks. New cell growth takes place at the tips of plant roots. ... Eventually, molecule by molecule, the plant's growth can force its way into the slab and create a surface crack.
Will Give Brainliest!!
Answer:
A
Explanation:
because it's positive
The atomic model that describes an atom as a spherical object containing a certain number of electrons trapped in a mass of positive charge is often called the ___________ model.
help
A.6.10
B.90
C.6.00
6.20
Answer:
6.1
Explanation:
Because if you get to the large mark it would be 5 but since its not at 5, it would be 6.1 as you can see in my drawing. It aligns perfectly with 6.1.
Wing practice problems:
1. How many grams of water could freeze at 0°C when 525 KJ of energy is released?
Answer:
g x 334 J/g = 3340J or 3.34kJ.
Explanation:
The energy required for one gram of a solid to melt without experiencing any temperature change is known as the heat of fusion. 3.34 KJ of energy is released.
What is heat of fusion ?The most typical illustration is when solid transforms into liquid water. The molecules within the substance become less structured as a result of this process, which is also known as melting or heat of fusion.
The change in enthalpy ( H ) that occurs when a substance transforms from a solid to a liquid state.
The amount of energy required for one gram of a liquid to evaporate (boil) without a change in pressure is known as the heat of vaporization.
Q = gram × 334 J / g
= 3.34 KJ
Thus, at 0°C when 525 KJ of energy released is 3.34 KJ.
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Which contains more carbon 4.71 g of C6H12O6 or 5.85 g C2H6O?
Answer:
5.85 g C2H6O has more carbon
Explanation:
Weight of carbon in 4.71 g of C6H12O6
[tex]4.71 * 12.01\\56.5671\\[/tex] grams
Weight of carbon in 5.85 g of C2H6O
[tex]5.85 * 12.01\\70.259\\[/tex] grams
Hence, 5.85 g C2H6O has more carbon
different between:Electrovalent bond and covalent bond
Explanation:
electrovalent bond covers single bond.
Covalent bond covers double or more bonds.
Un químico desea identificar una sustancia de naturaleza desconocida. Para ello, vierte en una probeta 45 mL de la sustancia; luego mide la masa en una balanza y obtiene un valor de 38,5 g. Según los valores indicados en la tabla, ¿a cuál sustancia debiera corresponder?
Answer:
La respuesta está en la explicación
Explanation:
Al realizar este análisis, el químico estará obteniendo la masa que la sustancia desconocida ocupa en un volumen determinado, a esto se le conoce como La Densidad de la Sustancia.
La densidad se puede definir como la masa (En gramos) que pesa una sustancia que ocupa 1mL. Así, la densidad de esta sustancia será:
38.5g / 45mL =
0.856g/mL es la densidad de esta sustancia
Ahora, debes identificar en la tabla, cuál sustancia tiene una densidad similar a la obtenida y, de esta manera, podrías saber a cuál sustancia corresponde.
If the density of mercury is 13.6 g/mL, what is the mass of 25.4 cm3 of
mercury?
Answer:
345.44 g or 0.34544 kg
Explanation:
Applying
D = m/V...................... Equation 1
Where D = Density of mercury, m = mass of mercury, V = Volume of mercury.
make m the subject of the equation
m = D×V................. Equation 2
From the question,
Given: D = 13.6 g/mL = 13.6 g/cm³, V = 25.4 cm³
Substitute these values into equation 2
m = 13.6×25.4
m = 345.44 g
m = 0.34544 kg
Hence the mass of mercury is 345.44 g or 0.34544 kg
If the scientist measured the mass of the copper cube after it had been in the furnace for one hour what would the cube’s mass probably be? Explain your answer
How many grams of aluminum to complete the reactions below?
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.
26.9 grams
B.
55 grams
C.
53.96 grams
D.
2 grams
The answer is option C
Explanation:
Al= 26.982
2 moles of aluminium wad given so
2× 26.982= 53.96 grams
When the medium is uniform, how do light waves travel through it? vibrating motion circular motion irregular motion straight line motion
Answer:
straight line
Explanation:
Answer:
All K12 ppl say yeye
Explanation:
please help me with question A and B pleaseeeeee
Answer:
♀️?sorryyyyyyyyyyyyy
What is the molarity of a 511 ml solution containing
205 mg of NH3?
Answer: The molarity of given solution is 0.0235 M.
Explanation:
Given : Volume of solution = 511 mL
Convert mL into L as follows.
[tex]1 mL = 0.001 L\\511 mL = 511 mL \times \frac{0.001 L}{1 mL}\\= 0.511 L[/tex]
Mass of [tex]NH_{3}[/tex] (solute) = 205 mg
Convert mg into gram as follows.
[tex]1 mg = 0.001 g\\205 mg = 205 mg \times \frac{0.001 g}{1 mg}\\= 0.205 g[/tex]
As molar mass of [tex]NH_{3}[/tex] is 17 g/mol. Hence, number of moles of [tex]NH_{3}[/tex] are calculated as follows.
[tex]No. of moles = \frac{mass given}{molar mass}\\= \frac{0.205 g}{17 g/mol}\\= 0.012 mol[/tex]
Molarity is the number of moles of a solute dissolved in a liter of solution.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}[/tex]
Substitute the values into above formula as follows.
[tex]Molarity = \frac{no. of moles}{Volume (in L)}\\= \frac{0.012 mol}{0.511 L}\\= 0.0235 M[/tex]
Thus, we can conclude that the molarity of given solution is 0.0235 M.
Which of the following resources is inorganic and renewable
What is the Environmental Lapse Rate?
Answer:
The rate at which the air temperature changes with height in the atmosphere surrounding a cloud or a rising parcel of air. The overall average rate is a decrease of about 6.5°C/km, but the rate varies greatly in different regions of the world, in different airstreams, and at different seasons of the year.
¿Cual es porcentaje de una solucion que contiene 10g de sal disueltos en 500 mL de solución?
Answer:
0.02 g/ml
Explanation:
si dividimos 10 con 500, es decir, 10/500, obtenemos 0.02. Las unidades serán g / ml.
What of the following is NOT a common property of metals?
Answer:
liquid at room temperature
mercury is an exception to that though