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insens350 [35]
3 years ago
13

DesperateDesperateDesperateDesperateDesperateDesperateDesperate

Chemistry
1 answer:
ale4655 [162]3 years ago
5 0
It moved up one unit because of the dinosaur
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7g of gold is heated from 17 degrees C to 42 degrees C. How much energy (heat) was used? The specific heat capacity of gold is .
wel
Heat needed=mcθ
=7×0.031×(42-17)
=5.425cal
7 0
3 years ago
What is a polyatomic ion? Consulting p.117 in text, list the formulas and names of at least 10 polyatomic ions. When writing the
aleksley [76]

Answer:

The answer to your question is below

Explanation:

Polyatomic ions are ions composed for more than 1 atom. There are polyanions and polycations.

Polyanions have a negative charge and polycations have a positive charge.

Examples

                      Polyanions                             Polycations

  acetate           CH₃COO⁻        ammonium      NH₄⁺¹                                    

  bromate          BrO₃⁻

  chlorate           ClO₃⁻

  hydroxide        OH⁻

  nitrate              NO₃⁻

  nitrite               NO₂⁻

  sulfate             SO₄⁻²

  phosphate      PO₄⁻³

  permanganate  MnO₄⁻

We write parentheses before or after a polyatomic ion to emphasize that the oxidation number of the atom which interacts with it affects all the atoms that form part of the polyatomic ion.

4 0
3 years ago
The compound nicl2 is an ionic compound. what are the ions of which it is composed?
densk [106]
Nickel and chlorine
Ni+
Cl-
3 0
3 years ago
in a torricell barometer a pressure of one atmospheric pressure supports q 760 mm coloumn of mercury.if the original tube contai
dybincka [34]

Answer:

The answer to the question is

The height of the mercury fluid column remain the same.

Explanation:

The pressure, P in a column of fluid of height, h is given by

P = (Density p)×(height of fluid column h)×(gravity g)

Therefore, when the diameter is doubled we have

Density of the mercury in the tube with twice the diameter = (Mass of mercury)/(volume of mercury) where the volume of mercury = h×pi×(Diameter×2)^2/4 = h×pi×Diameter^2. Therefore the volume increases by a factor of 4 and therefore the mass increases by a factor of 4 which means that the density remains the same hence

P = p×h1×g = p×h2×g Therefore h1 = h2

The height of the fluid column remain the same

5 0
3 years ago
What is the partition coefficient of acetic acid between water & butanol
asambeis [7]

Answer:

Distribution coefficients of acetic acid between aqueous phase and solvents (water-C 6 -C 10 alcohols, butyl acetate, ether and benzene) were studied. Synergetic effect was obtained for alcohol and ester systems. A slightly positive deviation was obtained for benzene–ester mixtures. The best distribution coefficient was obtained for hexanol-butyl acetate systems. The coefficients of Redlisch-Kister equation were obtained for the deviations.

8 0
3 years ago
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