What are the components of our solar system?

Answer:

Similarly, drugs, chemicals, temperature, and light are among the external environmental factors that can determine which genes are turned on and off, thereby influencing the way an organism develops and functions.

Explanation:

Answer:

if it has anything to do with plutonuim, uranium , or burilium its radiation

Explanation:

those elements emit radiation

Answer:

B: drying towels at the beach

Explanation:

I had this on my EDG assignment for radiation and I got it correct.

I hope this is what you were looking for

Answer:

pulling objects with mass closer to each other

Explanation:

that is the only role of gravity

Answer:

Thomson's atom model.

Explanation:

His model is the plum pudding model of an atom. There are negatively charged subatomic particles or electrons placed within positively charged matter.

Hope this helps!

Answer:

Always wear safety goggles when performing an experiment.

Use caution when constructing the track.  

Ensure that the track is clear before releasing cars.

Report all accidents to the teacher.

Explanation:

Answer:

The food colouring mixes through the hot water faster than it mixes with the cold water, this is because in hot water the water molecule have more energy and are moving faster than the molecules of cold water .This makes it easier for the food colouring to get mixed quickly through the hot water.

Answer:

Explanation:

h

c i think

Explanation:

if it's not look it up

Answer:

The original U.S. voting system had some similarities with that of Athens. In Athens, every citizen could speak his mind and vote at a large assembly that met to create laws. Citizens were elected to special councils to serve as organizers, decision-makers, and judges. The Greek idea of democracy was different from present-day democracy because, in Athens, all adult citizens were required to take an active part in the government. ... This form of government is called direct democracy. The United States has a representative democracy.

Answer:

the reactants and products have have exactly the same molecules

The reactants and products have exactly the same atoms, therefore the concept of conservation of mass applies to chemical reactions. Therefore,  option (b) is correct.

According to this law, matter can neither be created nor destroyed, but can be converted from one form to another. So the same number and type of atoms in a chemical reaction before and after the chemical change are present.

The initial substances or reactants change into different substances or products in any chemical change. Both the reactants and products are made up of atoms as all matter is made up of atoms.

The matter is conserved as the equal number of atoms of each element in the reactants and products, and the total mass of the reactants must equal the total mass of the products.

The law of conservation of mass can be only followed in a chemical reaction if the reactants and products have exactly the same atoms.

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Answer: 429 grams of [tex]Al(NO_2)_3[/tex]  should be added to 1.3 L of water to prepare 2.0 M solution

Explanation:

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

[tex]Molarity=\frac{n}{V_s}[/tex]

where,

n = moles of solute [tex]Al(NO_2)_3[/tex] = [tex]\frac{\text {given mass}}{\text {Molar mass}}=\frac{xg}{165g/mol}[/tex] 

[tex]V_s[/tex] = volume of solution in Liters  

Now put all the given values in the formula of molarity, we get

[tex]2.0M=\frac{xg}{165g/mol\times 1.3L}[/tex]

[tex]x=429g[/tex]

Therefore, 429 grams of [tex]Al(NO_2)_3[/tex]  should be added to 1.3 L of water to prepare 2.0 M solution

Answer:

C) polar covalent bonds

Explanation:

Polar covalent bonding can be regarded as a chemical bond that involves a pair of electrons which is

unequally shared between two atoms.

The electron are not shared equally as a result of one of the atom spending more time with the electron compare with the other atom. It is one whereby atoms having different electronegativities involves themselves in sharing electrons in a covalent bond

Answer and Explanation:

A nonmetal is the answer.

Cause they are dull and brittle, and can be a gas at times at room temperature.

#teamtrees #PAW (Plant And Water)

Answer:

[tex]E=5.16\times 10^{-19}\ J[/tex]

Explanation:

Given that,

The frequency of violet light, [tex]f=7.79\times 10^{14}\ Hz[/tex]

We need to find the energy of a photon. The formula for the energy of a photon is given by :

[tex]E=hf\\\\E=6.63\times 10^{-34}\times 7.79\times 10^{14}\\\\E=5.16\times 10^{-19}\ J[/tex]

So, the energy of a photon is equal to [tex]5.16\times 10^{-19}\ J[/tex].

Answer:

Answer:

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3 3 4

2 4

2 5

4

3 3 4

2 4

2 5

4

(( ) )) 143 /

( ) 98 /

( ) 108 /

( ) 474.8 /

484.25 (( ) ) 3.39

143

75.46 ( ) 0,77

98

270 ( ) 2,5

108

546 ( ) 1,15

474,8

m

M

M NH PO g mol

M H SO g mol

M N O g mol

M SnF g mol

NH PO mol

H SO mol

N O mol

SnF mol

According to the mole concept, there are 0.77 moles in 75.46 g of sulfuric acid.

Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.

It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.

It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass  in grams present in one mole  of atoms is its atomic mass.

Number of moles is calculated as, mass/molar mass=75.46/98=0.77 moles.

Thus, there are 0.77 moles in 75.46 g of sulfuric acid.

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Answer:

Mycelial threads

Explanation:

Through the mycelium threads, a fungus or in this case a mushroom absorbs nutrients from its environment. It does this in a two-stage process. First, the hyphae secrete enzymes onto or into the food source, which break down biological polymers into smaller units such as monomers. Mycelium is an important food source for many soil invertebrates.

Answer:

wassssssssssssssssap

Explanation:

yes

include sodium and potassium, dissolve instantly and dramatically in plain water — no stronger acid is needed. The metals react violently with water, releasing and igniting hydrogen gas and causing an explosion.

I think they dont

Explanation:

so I guess metals don't dissolve in water

Answer:

Jonathan’s claim is right.

Explanation:

Jonathan’s claim is right because photons emitted by both sources i.e. sun and the light bulb has the same wavelength which looks practically identical to each other. But some differences in the light spectrum of sun and a light bulb i. e.  light bulb has more infrared output than visible and ultraviolet while on the other hand, sun has more visible light than infrared and ultraviolet radiations so we can say that Jonathan's claim is right about the emission of light.

Answer:

124225.91 g of Na₃PO₄

Explanation:

From the question given above, the following data were obtained:

Number of atoms of Na₃PO₄ = 4.56×10²⁶ atoms

Mass of Na₃PO₄ =?

From Avogadro's hypothesis,

6.02×10²³ atoms = 1 mole of Na₃PO₄

Next, we shall determine the mass of 1 mole of Na₃PO₄. This can be obtained as follow:

1 mole of Na₃PO₄ = (23×3) + 31 + (16×4)

= 69 + 31 + 64

= 164 g

Thus,

6.02×10²³ atoms = 164 g of Na₃PO₄

Finally, we shall determine the mass of Na₃PO₄ that contains 4.56×10²⁶ atoms. This can be obtained as follow:

6.02×10²³ atoms = 164 g of Na₃PO₄

Therefore,

4.56×10²⁶ atoms = (4.56×10²⁶ × 164)/6.02×10²³

4.56×10²⁶ atoms = 124225.91 g of Na₃PO₄

Therefore, 124225.91 g of Na₃PO₄ contains 4.56×10²⁶ atoms

Answer:Protons are positively charged is the correct statement about an atom

I've also corrected the other statements

Atoms contain protons and neutrons in their nucleus

Neutrons posses no charge and are neutral

The nucleon number is the total number of protons and neutrons in a nucleus

Answer: velocity

Explanation:

Answer:

Earth; heat.

Explanation:

Radiation can be defined as the flow, transmission or emission of energy in the form of atomic and subatomic particles and waves through a material medium or space.

Solar radiation is a form of electromagnetic radiation emitted by the sun on the earth's surface as ultraviolet, infrared and visible light.

Hence, the sun radiates energy towards the earth surface and some of this radiant energy is in the form of heat. Radiation is generally considered to be the least important mode of the transportation of heat from one point to another in planet earth.

Answer:

A

Explanation:

Answer:

1. The day when the day and night are equal

2. equal

Explanation: