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2 years ago

Is metal rusting a chemical reaction? Yes or no

2 answers:

5 0

Answer: Yes it is. Rust would be considered a chemical reaction because it changes the chemical makeup of the metal.

Explanation:

bonufazy [111]2 years ago

3 0

Answer:

Yes

Explanation:

Rusting is an example of a chemical reaction because it creates a new product. When iron reacts with oxygen (rusting) it becomes Iron (III) oxide.

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A rocket is designed to drop its first stage mid-flight. Due to a malfunction, this does not occur. What is a possible result of

artcher [175]

Answer:

The rocket is now too heavy to reach its destination.

3 0

3 years ago

Read 2 more answers

4. DBearded waste of Co-60 must be stored until it is no longer radioactive. Cobalt-60

Bingel [31]

464 g radioisotope was present when the sample was put in storage

<h3>Further explanation</h3>

Given

Sample waste of Co-60 = 14.5 g

26.5 years in storage

Required

Initial sample

Solution

General formulas used in decay:

$\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}$

t = duration of decay

t 1/2 = half-life

N₀ = the number of initial radioactive atoms

Nt = the number of radioactive atoms left after decaying during T time

Half-life of Co-60 = 5.3 years

Input the value :

$\tt 14.5=No.\dfrac{1}{2}^{26.5/5.3}\\\\14.5=No.\dfrac{1}{2}^5\\\\No=\boxed{\bold{464~g}}$

8 0

2 years ago

we make 200 mL of a solution with a 0.025 M concentration of Ca(OH)2 The solution is then diluted to 1.00 L by adding additional

ExtremeBDS [4]

Answer:

12.00

Explanation:

4 0

3 years ago

Which of the following is more electronegative:

Firdavs [7]

The answer is 1) CF3
Because: the equivalent of Fluorine is -1 so it aims to get an electron so much. which means it's electronegative.
but the equivalent of Hydrogen is +1 so it aims to give an electron. which means it's electropositive.

please mark as brainliest answer

5 0

2 years ago

Which acid has the largest ka: hclo3(aq), hbro3(aq) or hio3(aq)?

ryzh [129]

Greater the Ka value greater is the acid strength. Among these three acids HClO3 is the strongest acid, with greatest Ka and lowest pKa value (-1), Then comes HBrO3, its the second most strongest acid among the three, its Pka value is 0.7, higher than HClO3 but smaller than HIO3 (i.e. 0.77) which the weakest acid among the three.

3 0

3 years ago