What kind of chemical do you use to remove old polish for customer who has artificial nails?

Which of the following could lead to static discharge?

Ahat [919]

Answer:

Static charge is caused by the build up of electrons on the atoms of an object.

Explanation:

You can experience this yourself with a balloon! Rub it against your head in order to disassociate electrons from it, causing it to be charged - you can now put it on a wall and notice how it 'sticks' to it. You can also cause this effect by jumping on a trampoline, causing static charge to be built up - which is sometimes why you feel a little 'zap' when you touch the sides of it.

3 0

3 years ago

WEATHER PREDICTIONS FROM

fiasKO [112]

Answer:

These predictions are likely to be valid and should be needed.

Explanation:

Meteorologist made predictions about weather of a particular area on the data they received from the satellite. Meteorology is a branch of science in which we study about the atmosphere. It is mainly used for the forecasting of weather and meteorologists are those people or scientists who study the weather and research on different scales or instruments of weather.

7 0

3 years ago

I know that the answer is C. 8, but can you explain step by step how to get that answer?

Leya [2.2K]

Answer:

8

Explanation:

Oxidation:

$Fe^{2+} -->Fe^{3+}+e^{-}$

Reduction:

$Cr_{2}O_{7}^{2-}+6e^{-} -->2Cr^{3+}$

We have to equalise the number of moles of electrons gained and lost in a redox reaction in order to get a balanced reaction.

Hence we have to multiply the oxidation reaction throughout by 6.

and adding the two half-reactions we obtain:

$6Fe^{2+}+Cr_{2}O_{7}^{2-} -->6Fe^{3+}+2Cr^{3+}$

Still the total charge and number of oxygen is not balanced.

Since the reaction takes place in acidic conditions, we will add required number of H+ to the appropriate side to balance the charge and add half the amount of H2O to balance the hydrogen atoms.

We add 14 H+ on LHS and 7H2O on RHS to obtain:

$6Fe^{2+}+Cr_{2}O_{7}^{2-}+14H^{+} -->6Fe^{3+}+2Cr^{3+}+7H_{2}O$

Sum of coefficients of product cations = 6+2 = 8

4 0

3 years ago

Bleach boils at 101°C. Isopropyl alcohol (rubbing alcohol) boils at 82.5°C. Vinegar boils at 100.6°C. Water boils at 100°C. A st

SVETLANKA909090 [29]

Answer:

most likely water

Explanation:

most likely it is water, however pressure plays a role, if you are at sea level the boiling point of water is 100°C but if you are on Mt. Everest it is 71°C, assuming she is slightly above sea level it is water.

4 0

3 years ago

Copper can be drawn into thin wires. How many meters of 34-gauge wire (diameter = 6.304 × 10ିଷ in ) can be produced from the cop

otez555 [7]

Answer:

Therefore, the length of copper wire in meters = 8321.01 m

Explanation:

Mass of covellite = 5.01 lb

Note: 1 lb = 453.592 g, therefore mass of covellite in grams = 5.01 * 453.592 = 2272.496 g

Mass copper in the covellite = 66% * 2272.496 = 1499.847 g of copper

Volume of copper in 1499.847 g of copper is obtained using the formula; volume = mass/ density

volume of copper = 1499.847 g/ 8.95 gcm⁻³ = 167.58 cm³

since the wire is considered to be a cylinder, the length of the wire is same as the height of a cylinder

Using the formula, V = πr²h

h = V/πr²

radius of wire, r = diameter/2

diameter = 6.304 * 10⁻³ in.

1 inch = 2.54 cm, therefore radius of wire = (6.304 * 10⁻³ in * 2.54 cm)/(2 * 1 in) = 8.00608 * 10⁻³ cm

h = 167.58 cm³/ {3.142 * (8.00608 * 10⁻³ cm)²}

h = 832101.211 cm

1 cm = 0.01 m

Therefore, the length of copper wire in meters = 832101.211 * 0.01 m = 8321.01 m

6 0

3 years ago