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1. Locations where volcanoes form far from plate boundaries are called
A. islands
B. hot spots
C. divergent zones

Answer:

Cr is oxidised

and

Zn is reduced

[ Reduced reactant ] :

Cr^( + 3 ) + 3 e^( - 1 ) ===》 Cr^( 0 )

_____________________________

[ Oxidicided reactant ] :

Zn^(0) ===》Zn^( + 2 ) + 2 e^( - 1 )

Answer:

[tex]1 \: mole = 6.02 \times {10}^{23} \: atoms \\ 6.5 \: moles = (6.5 \times {6.02 \times 10}^{23} ) \: atoms \\ = 3.913 \times {10}^{24} \: atoms[/tex]

Answer:

because of heat and pressure

Answer:

Phenolphthalein is a chemical compound with the formula C20H14O4 and is often written as "HIn" or "phph" in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in acidic solutions and pink in basic solutions.

Answer:

Phenolphthalein is a chemical compound, a colorless crystalline solid, though pink in a alkaline solution, and is also used as an acid-base indicator.

Explanation:

Answer:

It is a halogen element

Explanation:

hope this helps

have a great day/night

Answer:

Explanation: a) Reaction is exothermic because heat is released

                       If temperature is lowered, amount of products is increased,

                      equilibrium transfers to right

b) If pressure decreases, equilibrium transfers to direction in which amount of gas moles is greater, also in left (reactants)

c) If Oxygen is removed, reaction which produces more oxygen is favoured, also balance changes to reactansts (left)

d) Adding product causes equilibrium transfer to left (reactansts)

Answer:

The required volume is 0.84 L

Explanation:

Given,

Mass of O2 gas = 1.20 g

We know,

At STP, molar volume of all gases is 22.4 L

and Molar mass of O2 gas is 32 g

Now,

Number of moles = mass/molar mass

                              = 1.20/32

                              = 0.0375

Again,

At STP,

Number of moles = Volume/Molar volume

or, Volume = Number of moles X Molar Volume

or Volume = 0.0375 X 22.4

∴ Volume = 0.84 L

So, the required volume is 0.84 L

Answer:

[tex]1oz=29.589ml[/tex]

Explanation:

From the question we are told that:

Initial Volume [tex]v_1=250ml[/tex]

Final Volume [tex]v_2=8.45oz[/tex]

Generally the equation for one ounce is mathematically given by

 [tex]1oz=\frac{v_1}{v_2}[/tex]

Therefore

 [tex]1oz=\frac{250}{8.45}[/tex]

 [tex]1oz=29.589ml[/tex]

Answer:

[tex]V_2=10mL[/tex]

Explanation:

Hello there!

In this case, according to the given information, it will be possible for us to solve this problem by using the Boyle's law as an inversely proportional relationship between pressure and volume:

[tex]P_2V_2=P_1V_1[/tex]

In such a way, we solve for the final volume, V2, and plug in the initial volume and pressure and final pressure to obtain:

[tex]V_2=\frac{P_1V_1}{P_2} \\\\V_2=\frac{2.0atm*200.mL}{40.atm}\\\\V_2=10mL[/tex]

Regards!

Answer:

0.603J/g°C is the specific heat of the metal object

Explanation:

To solve this question we must know the heat given by the metal is equal to the heat absorbed by the water. The change in heat follows the equation:

Q = m*S*ΔT

Where Q is heat in Joules, m is the mass of the substance, S its specific heat and ΔT change in temperature

The equation to solve the problem is:

m(Object)*S(Object)*ΔT(Object) = m(Water)*S(Water)*ΔT(Water)

Where:

m(Object) = 29.0g

S(Object) = ??

ΔT(Object) = (97.0°C - 23.7°C = 73.3°C)

m(Water) = 95.8g

S(Water) = 4.184J/g°C

ΔT(Water) = (23.7°C - 20.5°C = 3.2°C)

29.0g*S(Object)*73.3°C = 95.8g*4.184J/g°C*3.2°C

S (Object) * 2125.7g°C = 1282.6J

S(Object) = 0.603J/g°C is the specific heat of the metal object

Answer:

Maritime tropical air mass

Continental polar air mass

Explanation:

Answer ⬇️

These mills employed millstones that rotated against one another to crush grains into flour mill machine. They rely on a process of crushing grain between two rapidly rotating rollers, then separating the ground grain into individual components, including bran, germ and endosperm.

➡️dhruv73143(⌐■-■)

Answer:

CH2O and C6H12O6

Explanation:

To find an empirical formula, take a molecular formula and divide the subscript of each element by the greatest common factor of all the subscripts. In this case, the only pair that works is CH2O,C6H12O6, which can be verified by dividing the coefficients of the molecular formula by 6.

Answer:

13.7 liters

Explanation:

I took the test and got it right

The total volume of the NaCl solution whose molarity is 0.04 M is 13.7 liters.

Molarity of any solution is define as the number of moles of solute present in per liter of the solution and it will be represented as:

M = n/V

Mass from moles will be calculated as:
n = W/M, where

W = given mass of NaCl = 32g

M = molar mass of NaCl = 58.44g/mol

mole = 32g / 58.44g/mol = 0.547 mol

Molarity of solution = 0.04 M

On putting values on the above equation, we get volume as:
V = 0.547 mol / 0.04mol/L

V = 13.67 L = 13.7L

Hence required value of volume is 13.7 L.

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Answer:

27*6 dkfkdh hshsnnsbssshs ss. hhshsns svs s ssjssgsyz

Explanation:

ysgshssbs

Answer:

Explanation:

have a good day

Explanation:

A geological process where materials of Earth are transported from one place to another by natural forces like wind or water is called erosion.

When materials of Earth are deposited over a certain landmark due to transportation by natural forces then this process is called deposition.

The four major causes of erosion and deposition are as follows.

Gravity - Force that is responsible for attracting an object towards the center of Earth.

Running water - Water present in the rivers, oceans or lakes is moving from one place to another. Also, along with it carries pebbles or other materials.

Wind Waves - This is basically air and it keeps on moving from one place to another all the time. Wind waves tend to carry dust particles or other materials along with it.

Glaciers - When a mass of ice that is formed by accumulation and compaction of snow over mountains or around the poles tends to move slowly is called glaciers.

The coefficients in a balanced equation can be used as molar ratios, which can act as conversion factors to relate the reactants to the products. These conversion factors state the ratio of reactants that react but do not tell exactly how much of each substance is actually involved in the reaction.

Answer:

I did it in steps in the picture I just hope it helps you to understand:)

5) B

6) C

7) B newland, law of octaves

8) A)

Answer:

T = 3206.89 K

Explanation:

Given that,

Number of moles, n = 1.9 moles

Pressure, P = 5 atm

Volume, V = 100 L

We need to find the temperature of the gas. Let the temperature is T. We know that,

PV = nRT

Where

R is gas constant, R = 0.08206 L-atm/mol-K

Put all the values,

[tex]T=\dfrac{PV}{nR}\\\\T=\dfrac{5\times 100}{1.9\times 0.08206 }\\\\T=3206.89\ K[/tex]

So, the temperature of the gas is 3206.89 K.

Answer:

A.

Cu Zn K is are metals which form ionic bond with oxygen

The law is approximately valid for real gases at sufficiently low pressures and high temperatures. The specific number of molecules in one gram-mole of a substance, defined as the molecular weight in grams, is 6.02214076 × 1023, a quantity called Avogadro's number, or the Avogadro constant.

Answer:

Hello There!!

Explanation:

The answer is that it states that under the same pressure and temperature conditions, equal volumes of all gases contain the same number of molecules.

Formula:Vn=k

hope this helps,have a great day!!

~Pinky~

If the half-life for carbon-14 is 5730 years, then it will take 11,460 years to complete die of this sample.

Half life period is a time of decay in which concentration of reactant is left half of its initial concentration, means half of the reactant will convert into product.

Total time of decay will be calculated as:

T = (t)ⁿ, where

t = half life time = 5730 years

n = number of half lives = 2 (given)

On putting values, we get

T = (5730)² = 11,460 years

Hence required time for decay is 11,460 years.

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Answer:

The first part is 5 and the second part is 28,650

Answer:

10.35= 4 sig figs but change it to 2 since it's 2.3 is the lowest number

10.

hope this helps

have a good day :)

Explanation:

ig The right answer is -Give the reaction more time.

Answer:

alpha  decay

Explanation:

Answer:

2H2 in products

Explanation:

she should have added another 2 in H2

The edited equation does not balance the number of hydrogens. The correct balanced equation for the given reaction is written as follows:

[tex]\rm 2H_{2}O \rightarrow 2H_{2} +O_{2}[/tex].

The balanced chemical equation of a reaction represents the perfect stochiometric coefficients of all the reactants and products. Thus, each elements in the reaction have to be equal in both side.

According the mass conservation law, the total mass of the reactants is equal to the total mass of the products. Thus, all elements have to balanced on each side.

When water dissociates into hydrogen and oxygen molecules, 2moles of water undergoes dissociation to give two moles of H2 and one mole of O2. Thus the balanced equation is:

[tex]\rm 2H_{2}O \rightarrow 2H_{2} +O_{2}[/tex]

To find more on balanced reactions, refer here:

https://brainly.com/question/22064431

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