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1 year ago

What is the difference between accurate data and reproducible data?

Chemistry

1 answer:

Mkey [24]1 year ago

8 0

Answer:

HERE IS UR ANSWER...

The data which is accurate means it can't be changed further is called accurate data.while,

The data which is changed again and again is called reproducible data.

HOPE IT'S HELP U..

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A student mixes a 10.0 ml sample of 1.0 m naoh(aq) with a 10.0 ml sample of 1.0 m hcl(aq) in a polystyrene container. the temper

AleksAgata [21]

Hrxn = Q reaction / mol of reaction
mol of reaction = M * V = 10 * 1 = 10 mmol = 0.01 mol
Q water = m * C * (Tf - Ti)
= (10 + 10) (4.184) (26-20) = 502.08 J
Q reaction = - Q water = -502.08 J
Hrxn = -502.08 / (0.01) = - 50208 J = - 50.21 kJ/mol

5 0

2 years ago

Purification of nickel can be achieved by electrorefining nickel from an impure nickel anode onto a pure nickel cathode in an el

Alexxandr [17]

Answer: 530 hours

Explanation:

The reduction of Nickel ions to nickel is shown as:

$Ni^{2+}+2e^-\rightarrow Ni$

$96500\times 2=193000Coloumb$ of electricity deposits 1 mole of Nickel

1 mole of Nickel weighs = 58.7 g

Given quantity = 18.0 kg = 18000 g (1kg=1000g)

58.7 g of Nickel is deposited by 193000 C of electricity

18000 g of Nickel is deposited by = $\frac{193000}{58.7}\times 18000=59182282.8C$ of electricity

$Q=I\times t$

where Q= quantity of electricity in coloumbs = 59182282.8C

I = current in amperes = 31.0 A

t= time in seconds = ?

$59182282.8C=31.0A\times t$

$t=1909105.9sec$

(1h=3600 sec)

$t=530hours$

Thus 530 hours are required to plate 18.0 kg of nickel onto the cathode if the current passed through the cell is held constant at 31.0 A

3 0

2 years ago

If an atom has 34 electrons, 46 neutrons, and 34 protons, what is its mass number? what is the name of the element?

OleMash [197]

Mass number = protons + neutrons = 34+46 =80

the element with an atomic number of 34 and mass number of 80 is selenium

7 0

3 years ago

A chemical bond is a strong attraction between two or more atoms. Can you identify the properties of different types of chemical

kakasveta [241]

Answer:

1. Ionic bond.

2.Ions

3. Covalent

4.Single bond

5. Double bond

6. Polar bond

7.Non polar bond

8. Hydrogen bond

5 0

2 years ago

Read 2 more answers

33) How many significant figures does the number 40230 have? *

Lyrx [107]

Answer:

Explanation:

they are all significant All non-zero numbers ARE significant

4 0

3 years ago