How many atoms is 45 moles of silicon (Si)?

Answer:

C. It would stay the same

Explanation:

PLATO answer

Answer:

It should be B

Explanation:

because I just searched it up if I'm wrong I'm wrong

Answer:transpiration just took the test

Explanation:

100%

Explanation:

C electrical energy is converted into potential energy

Answer:

I can confirm it is, Potential energy is converted into kinetic energy.

Explanation:

Answer:

number of significant figures-4

number of decimals-3

Answer:

B) Cations lose electrons having a charge of positive.

Explanation:

Hello there!

In this case, it is widely known that ions are classified as positive cations and negative anions, since the former is produced when a metal loses electrons and the latter when a nonmetal gains electrons; in such a way, the correct choice is:

B) Cations lose electrons having a charge of positive.

Best regards!

Answer:

Either B or A

Explanation:

The other answer said B, and I said either B or A, so anyone who is currently cheating on a chemistry test, try B

Answer:Calcium hydroxide is a polar compound. 2. Carbonates are insoluble in water unless it is combined with NH4+ or any group 1A ion. It is a colorless crystal or white powder and is produced when quicklime (calcium oxide) is mixed, or slaked with water.Ca(OH)2 is an ionic compound, in which Ca is the cation and OH is the anion. Ca (calcium) has a charge of 2+, since it is in group 2 on the periodic table.

Explanation: hope this helps and have a great night

Answer:

D. Electrical energy

Explanation:

I assume you are talking about an electrical current.

(These are by what I know and are simplified, not an exact definition)

A. Mechanical energy is energy that something has because of motion.

B. Magnetism is the attracting and repulsing forces between magnets.

C. Geothermal energy is heat inside of the Earth. Used as source of power.

D. Electrical energy is the result of an electric charge.

Answer:

53.6 g

Explanation:

Step 1: Write the balanced equation

2 Zn + Pb(SO₄)₂ ⇒ 2 ZnSO₄ + Pb

Step 2: Calculate the moles of ZnSO₄ produced from 0.332 moles of Zn

The molar ratio of Zn to ZnSO₄ is 2:2. The moles of ZnSO₄ produced are 2/2 × 0.0332 mol = 0.0332 mol.

Step 3: Calculate the mass corresponding to 0.332 moles of ZnSO₄

The molar mass of ZnSO₄ is 161.44 g/mol.

0.332 mol × 161.44 g/mol = 53.6 g

Answer:

this is very true

Explanation:

Answer:

Yes

Explanation:

One of the top goals of genetic engineering is the improvement of health. Imagine a world without the threat of AIDS or cancer. Those working in the genetics field hope that manipulating the genes of humans will one day enable science to prevent people from contracting these potentially deadly diseases.

Answer:

Magnesium Phosphide has a formula of Mg3P2 . Magnesium is a metal cation with a charge of Mg+2. Phosphorus is a nonmetal anion with a charge of P−3. In order to bond ionically the charges must be equal and opposite

Explanation:

Answer:

Synthesis reactions. Decomposition reactions. Combustion reactions.

Explanation:

Synthesis reactions. - Two or more reactants combine to make 1 new product

Decomposition reactions. - A single reactant breaks down to form 2 or more products.

Combustion reactions. - A single element or compound combines with oxygen gas releasing energy. This rapid oxidation is called burning.

Answer:

[tex]\boxed {\boxed {\sf False}}[/tex]

Explanation:

Kinetic energy is the energy of movement or energy at work. An example is a ball rolling down a hill.

Potential energy is stored energy due to the position of an object. For example, a ball resting at the top of a hill.

The question incorrectly described potential energy as kinetic energy. Therefore, the answer is false.

Answer:

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Explanation:

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es 3l por 0/0 (1234008×556098

Answer:

D; none of the above

Explanation:

Binary ionic compounds are composed of one metal and one nonmental.The metals are always the first element whereas the nonmetals are the second element.

Answer: Sodium fluoride

Answer:

1.276 moles

Explanation:

molar mass of H2SO4 = 2(1)+(32)+4(16) = 98 g

So, there are (125g)(1 mol/98g) = 1.276 moles

1.276 moles are in 125 g of H[tex]_2[/tex]SO[tex]_4[/tex]. A mole is indeed a unit that enables us to correlate the mass of a material with its components.

It is defined as the amount of any material that has the same number of basic units as there are in a precisely measured sample of 12C that weighs 12 g. Latin's word for pile, stack, or assemblage is "mole." The number of entities that make up a mole was discovered via experimentation to be 6.022 X 1023.

A mole is indeed a unit that enables us to correlate the mass of a material with its components. The total of the masses of all the atoms that make up one mole of a molecule, expressed in grams, is what is known also as molecular mass or molar mass. A substance's molar mass may be calculated by multiplying its given mass by its g/mol density.

molar mass of H[tex]_2[/tex]SO[tex]_4[/tex] = 2(1)+(32)+4(16)

                                    = 98 g

mole= (125g)(1 mol/98g)

       = 1.276 moles

Therefore, 1.276 moles are in 125 g of H[tex]_2[/tex]SO[tex]_4[/tex].

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Answer:When more gas particles enter a container, there is less space for the particles to spread out, and they become compressed. ... The particles exert more force on the interior volume of the container. This force is called pressure.

Explanation:

The chemical reaction at STP results in a volume of HBr gas that is roughly 3.09E3 L.

In a chemical reaction, reactants undergo a chemical reaction and transform into products through a chemical process. For instance, when humans breathe in oxygen, it combines with glucose to create carbon dioxide, water, and energy.

The temperature is 273.15 K and the pressure is 1 atm at STP (standard temperature and pressure).

The ideal gas law can be rearranged to account for V:

V = (nRT) / P

Substituting the values we are aware of:

n = 138 mol

R = 0.0821 L·atm/(mol·K)

T = 273.15 K

P = 1 atm

V = (138 mol * 0.0821 L·atm/(mol·K) * 273.15 K) / 1 atm

V = 3,092.1 L

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Answer:

[tex]\boxed{\bold { \large { \boxed {KE=\frac{1}{2} mv^2 \ , \ PE=mgh}}}}[/tex]

Explanation:

Kinetic energy formula

[tex]\displaystyle KE=\frac{1}{2} mv^2[/tex]

Potential energy formula

[tex]\displaystyle PE=mgh[/tex]

[tex]\displaystyle KE \Rightarrow \sf kinetic \ energy \ (J)[/tex]

[tex]\displaystyle PE \Rightarrow \sf potential \ energy \ (J)[/tex]

[tex]\displaystyle m \Rightarrow \sf mass \ (kg)[/tex]

[tex]\displaystyle v \Rightarrow \sf velocity \ (m/s)[/tex]

[tex]\displaystyle g \Rightarrow \sf acceleration \ of \ gravity\ (m/s^2)[/tex]

[tex]\displaystyle h \Rightarrow \sf height \ (m)[/tex]

Answer:

When the batter hits the ball, there is a force applied, and energy is transferred. The ball will move in the direction the force is pushing it. If two objects collide, energy will be transferred between both, and there will be a change in motion.

Explanation:

Answer:

Explanation:

A homogeneous mixture consists of one single phase while a heterogeneous mixture consists of two or more phases.

Answer: Salt water is a solution because it has these two characteristics: it has the same concentration of each of its parts throughout the solution, and it can be separated by some physical process.

Explanation: Literally learning about this in my science class XD

Answer:

You would get 19.969 moles.

Explanation:

You would get 19.969 moles.

Answer:

160.000 años corresponde a 16.000 décadas.

Explanation:

Para resolver correctamente el ejercicio debemos plantear la regla de tres simple de la siguiente manera:

1 década equivale a 10 años; A cuantas decadas equivalen 160.000 años?

1 década→10 años

          x    ←160.000 años

Debemos multiplicar 160.000 por 1 y luego dividir entre 10 ;

x=([tex]\frac{160.000x1}{10}[/tex])=16.000 décadas; en notación científica sería 16x10^3.

Respuesta: 160.000 años corresponde a 16.000 décadas.

Answer: The half-life of the compound is 93 minutes

Explanation:

Expression for rate law for first order kinetics is given by:

[tex]t=\frac{2.303}{k}\log\frac{a}{a-x}[/tex]

where,

k = rate constant  

t = age of sample

a = let initial amount of the reactant =100

a - x = amount left after decay process = (100-36) = 64

a) for completion of 36 % of reaction

[tex]60=\frac{2.303}{k}\log\frac{100}{100-36}[/tex]

[tex]k=\frac{2.303}{60}\log\frac{100}{64}[/tex]

[tex]k=0.0074min^{-1}[/tex]

b) for completion of half life:

Half life is the amount of time taken by a radioactive material to decay to half of its original value.

[tex]t_{\frac{1}{2}}=\frac{0.693}{k}[/tex]

[tex]t_{\frac{1}{2}}=\frac{0.693}{0.0074min^{-1}}=93min[/tex]

The half-life of the compound is 93 minutes