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3 years ago

What evidence lead rutherford to propose that the atom had a nucleus?

Chemistry

1 answer:

BigorU [14]3 years ago

5 0

Answer:

When he shot radiation through gold foil, some of the radiation shot back, some went directly through, and some slight angled off.

Explanation:

He knew that the radiation that had gone all the way through had not hit anything.

He knew that the radiation that came directly back must have hit a big nucleus.

He knew that the radiation that angled slightly off must have hit a smaller, orbiting particle (electrons).

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I want to use a galvanic cell to power a 60-watt light bulb. Complete the following steps to determine how long the galvanic cel

Dmitry [639]

Explanation:

On dissolution of chromium(II) sulfate is water 2 ions of chromium(III) ion and and 3 sulfate ions are formed.

The balanced chemical equations of the dissolution of chromium (II) sulfate:

$Cr_2(SO_4)_3(aq)\rightarrow 2Cr^{3+}(aq)+3SO_4^{2-}(aq)$

On dissolution of gold(III)nitrate is water 1 ions of gold(III) ions and and 3 ions of nitrate ions are formed.

The balanced chemical equations of the dissolution of gold(III) nitrate:

$Au(NO_3)_3(aq)\rightarrow Au^{3+}(aq)+3NO_3^{-}(aq)$

6 0

3 years ago

What is a molecule containing only carbon and hydrogen called?

pogonyaev

Answer:

Explanation:

it's called the hydrocarbon

4 0

4 years ago

Read 2 more answers

A force is applied but nothing happens

Lana71 [14]

If a force is applied but nothing happens, then it means that the forces are balanced. Being at such state, <span>equal forces are acting on an object in opposite directions. Hope this answers the question. Have a nice day. Feel free to ask more questions.</span>

7 0

3 years ago

A different brand of iron tablet was analysed by Hitration with 0.0093 mol.L" potassium

Gre4nikov [31]

The concentration of iron used in the titration : 0.009 M

<h3>Further explanation</h3>

Given

Reaction

Cr₂O₇²⁻ + 6Fe²⁺ + 14H⁺ ⇒ 2Cr³⁺ + 6Fe³⁺ + 7H₂O

0.0093 mol/L potassium dichromate

200 cm³ of dilute acid, 25cm³ was used in the titration.

Required

the concentration of iron

Solution

Titration formula

C₁V₁n₁=C₂V₂n₂⇒ From equation : n₁=6n₂(1=Cr₂O₇, 2=Fe)

titration average : 33+32.05+32.15+32.1 / 4 = 32.325 cm³(ml)

25 cm³ of iron solution used in titration :

$\tt V_1=32.325~ml\\\\V_2=25~ml\\\\C_1=0.0093~M\\\\\\\\C_1.V_1.n_2=C_2.V_2.n_1\\\\0.0093\times 32.325\times 6=C_2\times 25\times 1\\\\C_2=0.07215~M$

Dilution(25 ml from 200 ml iron solution)

$\tt C_2.V_2=C_1.V_1\\\\0.007215\times 25=C_1\times 200\\\\C_1=0.009~M$

4 0

3 years ago

How many grams of a solution that is 50% by weight NaOH

kkurt [141]

Answer:

12 g

Explanation:

We want to prepare 1 L of a 0.15 M NaOH solution. The moles of NaOH required are:

0.15 mol/L × 1 L = 0.15 mol

The molar mass of NaOH is 40.00 g/mol. The mass corresponding to 0.15 mol is:

0.15 mol × (40.00 g/mol) = 6.0 g

The starting solution is 50% by weight. The mass of solution that contains 6.0 g of NaOH is:

6.0 g NaOH × (100 g solution/50 g NaOH) = 12 g solution

8 0

4 years ago