1. Which of these is NOT found in the nucleus of an atom?
neutrons
protons
electrons
the mass of the atom

Answer: Mass

Explanation: I had the same question hope its right for you

Answer:

Diphosphane

Explanation:

Hope it helps

Answer:

Molarity = 2.4 M

Explanation:

Given data:

Mass of silver fluoride = 12.7 g

Volume of water = 125 mL (125 mL× 1 L /1000 mL = 0.125 L)

Molarity of solution = ?

Solution:

Number of moles of silver fluoride:

Number of moles = mass/molar mass

Number of moles = 12.7 g/ 41.98 g/mol

Number of moles = 0.30 mol

Molarity:

Molarity = number of moles of solute / volume in L

Molarity = 0.30 mol / 0.125 L

Molarity = 2.4 M

Answer:

The most apparent general environmental factor affecting the distribution of a species is climate. Suitable conditions of temperature and moisture are vital to all organisms. Certain species are intolerant of cold; other species cannot live in warm climates.

Answer:

the correct answer is air.

Answer:

water

Explanation:

the medium an electromagnetic wave travel the fastest is in water

Answer:

1. learn how to script

2. be in a good state of mind

3. drink water water warer

4.search for yt tutorials

Explanation:

A.

Reason: cuz i need points noob

Answer:

A. a ball dropped from the top of a building increases in speed until it hits the ground.

A ball dropped from the top of a building in speed until it hits ground is the situations violates the law of conservation of energy. Therefore, option A is correct.

According to the law of conservation of energy, energy is neither created nor destroyed. When you roll a toy car down a ramp, and it collides with a wall, the energy is transferred from kinetic to potential.

Energy conservation does not imply energy savings. Instead, energy is neither created nor destroyed, according to the law of conservation of energy. When people use energy, it does not vanish. Energy is transformed from one form of energy to another.

The law of conservation of energy is violated when a ball is dropped from the top of a building at high speed until it hits the ground.

Thus, option A is correct.

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Answer:Well the water molecules attract each other, and the oil molecules stick together.

sorry number two im not sure sorry:(

Explanation:

Answer:

the terminator because i did this test

Answer:

10°C

Explanation:

Here the problem deals with the relationship between the amount of heat lost and the temperature change of a body.

From the relationship below:

        H  = m C Δt

H is the quantity of heat

m is the mass

C is the specific heat

Δt is the change in heat

  We can see that the quantity of heat is directly proportional to the Δt, so as more heat changes occur, so also is the value of Δt .

Answer:

42.07%

Explanation:

Molar mass of Na3PO4 = 23×3 + 31 +16×4

= 69+ 31+64= 164 g/mol

Mass of Na in this compound is 69

Percentage of sodium in sodium phosphate = 69/ 164×100

Percentage of Na = 42.07%

Answer:

sand, flour, water

Explanation:

Some substances that don't dissolve in water:

- sand

-flour

-oil

-fats

-plastics

Explanation:

Determining the Limiting Reagent

One reactant (A) is chosen, and the balanced chemical equation is used to determine the amount of the other reactant (B) necessary to react with A. If the amount of B actually present exceeds the amount required, then B is in excess, and A is the limiting reagent.

The vertical columns may also be called "groups".

Answer:

The temp is 176k

Explanation:

Answer:

131.6 L

Explanation:

Ideal gas law is valid only for ideal gas not for vanderwaal gas. Therefore, the correct option is option B that is 131.5l. There is no force of attraction between the particles.

Ideal gas equation is the mathematical expression that relates pressure volume and temperature. Ideal gas is a hypothetical gas. Vanderwaal behave as ideal gas at high temperature and low pressure.

Mathematically,

PV=nRT

where,

P = pressure=1 atm

V= volume=?

n =number of moles=given mass/ molar mass

                                =  492.2/ 83.79

                                = 5.87 moles

T =temperature = 273K

R = Gas constant = 0.0821 L.atm/K.mol

1× V = 5.87 × 0.0821 L.atm/K.mol × 273 K

V =131.5l

131.5l is the  volume of a 492.2g sample of Kr gas.

Therefore, the correct option is option B that is 131.5l.

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Answer:

False

Infered from the equation:

Density=[tex]\frac{Mass}{Volume}[/tex]

So it has no relation with weight of substance

Answer:

0.706 L (Liters)

Explanation:

P1V1 = P2 V2 3 atm 250.0 mL = 1 atm X

T1 T2 290 K 273 K

706 mL = X

According to the question,

Pressure,

Temperature,

Volume,

By using the Boyl's and Charl's combination law, we get

→ [tex]\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}[/tex]

or,

→ [tex]V_2 = \frac{P_1 V_1 T_2}{T_1 P_2}[/tex]

By putting the values, we get

→      [tex]= \frac{3\times 250\times 273}{290\times 1}[/tex]

→      [tex]= 706 \ L[/tex]

Thus the aforementioned answer is right.

Learn more about pressure here:

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Answer:

its C

Explanation:

Answer: NaCl

Explanation:

Na+ Cl2 ----> NaCl

Answer:

1.

643.21g  1 mol  6.022^23

262.87 g   1 mol

= 1.4735E24     [Mg3(PO4)2]

2.

4.061x10^24          1mol                22.4 (L)  

6.022^23       1mol

= 151 liters H2O2

3.

479.3g   1 mol   6.022^23

18.02g    1mol

= 1.60E25 H20 atoms

4.

80.34L   1mol       164.1

22.4L       1mol

588.6g   Ca(NO3)2

5.

893.7g   1mol       22.4

44.01g   1mol

= 427 L CO2 or 427.4

6.

5.39 x 10^25     1mol     78.01

6.022^23    1mol

= 6980g Al(OH)3

hope this helps!! :)

Answer: hi theree, the answer is c. the processes of endocytosis and exocytosis occur here

hope this helps, have a good day :)

Explanation:

Answer:

C. The processes of endocytosis and exocytosis occur here

Explanation:

I just took the k12 test

Answer:

False

Explanation:

Metamorphic rocks form when rocks are subjected to high heat, high pressure, hot mineral-rich fluids or, more commonly, some combination of these factors.

This question is reffering to sedimentary rocks, so it's false.

Answer:

Weathering (breaking down rock) and erosion (transporting rock material) at or near the earth's surface breaks down rocks into small and smaller pieces. When the molten rock cools it forms an igneous rock. Metamorphic rocks can form from either sedimentary or igneous rocks.

Explanation:

True

Answer:

A polar covalent bond is defined as the bond which is formed when there is a low difference of electronegativities between the two non metals. Example: Phosphorous and chlorine, Nitrogen and hydrogen

Non-polar covalent bond is defined as the bond which is formed when there is no difference of electronegativities between the atoms. Example: Oxygen and oxygen

Ionic bond is formed when there is complete transfer of electron from a highly electropositive metal to a highly electronegative non metal. The electronegative difference between the elements is high.  Example: Potassium and chlorine

Answer:

A = 12150 nm²

Explanation:

The side of a cube, a = 45 nm

We need to find the surface area of the cube.

The formula for the surface area of a cube is given by :

A = 6a²

Substituting the value of a in the above formula.

A = 6(45)²

= 12150 nm²

So, the surface area of the cube is 12150 nm²

Explanation:

Multiply the moles Fe by 6.022×1023 atoms/mol