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padilas [110]
3 years ago
8

Suppose the galvanic cell sketched below is powered by the following reaction:

Chemistry
1 answer:
Alex17521 [72]3 years ago
7 0

Explanation:Mg(s)+Zn(NO3)2(aq) → Mg(NO3)2(aq)+Zn(s)

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A 13-gram rubber stopper is attached to a 0.93-meter
makkiz [27]
<h3>Answer:</h3>

The centripetal acceleration is 26.38 m/s²

<h3>Explanation:</h3>

We are given;

  • Mass of rubber stopper = 13 g
  • Length of the string(radius) = 0.93 m
  • Time for one revolution = 1.18 seconds

We are required to calculate the centripetal acceleration.

To get the centripetal acceleration is given by the formula;

Centripetal acc = V²/r

Where, V is the velocity and r is the radius.

Since time for 1 revolution is 1.18 seconds,

Then, V = 2πr/t, taking π to be 3.142 ( 1 revolution = 2πr)

Therefore;

Velocity = (2 × 3.142 × 0.93 m) ÷ 1.18 sec

             = 4.953 m/s

Thus;

Centripetal acceleration = (4.953 m/s)² ÷ 0.93 m

                                        = 26.38 m/s²

Hence, the centripetal acceleration is 26.38 m/s²

6 0
3 years ago
Note the molecular mass of a copper(I) oxide molecule in the image below. What is the mass of 8.250 moles of Cu2O?
xz_007 [3.2K]

Answer : The mass of copper(I) oxide is, 1180.5 grams.

Explanation : Given,

Moles of copper(I) oxide = 8.250 mol

Molar mass of copper(I) oxide = 143.09 g/mol

Formula used:

\text{ Mass of copper(I) oxide}=\text{ Moles of copper(I) oxide}\times \text{ Molar mass of copper(I) oxide}

Now put all the given values in this formula, we get:

\text{ Mass of copper(I) oxide}=(8.250moles)\times (143.09g/mole)=1180.5g

Therefore, the mass of copper(I) oxide is, 1180.5 grams.

5 0
3 years ago
An object has a volume of 22 liters and a mass of 35 kilograms what the objects density? Will it float or sink in the water?
Kobotan [32]

Answer:

density = 1.59

it will sink in water

Explanation:

density = m/v

x = 35/22

x= 1.59

4 0
4 years ago
Read 2 more answers
At 500.K and 1.00 atm pressure, 1.5 liters of pentane gas, C5H12, is mixed with 15 liters of oxygen gas. A complete combustion r
____ [38]

Answer:

1.5 litre of C5H12 produce 9 litre of water vapour;

Explanation:

First balance the combustion reaction;

C_5H_12 +8O_2 → 5CO_2 +6H_2O

from the balance reacion it is clearly that,

one mole of C5H12 reacts completely with 8 mole of O2 gas;

Hence

one litre of C5H12 reacts completely with 8 litre of O2 gas;

there fore 1.5 litre C5H12 needs 12 litre oxygen gas but we have 15 litre.

so,

C5H12 is a limiing reactant and O2 is a excess reactant.

so quantity of H2O depends on limiting reactant;

one litre of C5H12 produce 6 litre of water vapour;

therefore,

1.5 litre of C5H12 produce 9 litre of water vapour;

5 0
4 years ago
How is the polar vortex different from the jet stream?
kolezko [41]
The jet stream is a band of reliably strong wind that plays a key role in keeping colder air north and warmer air south. But when the vortex weakens, part of the weakened low-pressure system can break off. This breaking-off process is what causes a polar vortex.

Without that strong low-pressure system, the jet stream does not have enough force to maintain its usual path. It becomes wavy and rambling. When high-pressure systems get in its way, a collection of cold air pushes south, along with the rest of the polar vortex system
8 0
3 years ago
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