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dezoksy [38]
3 years ago
9

Why are some metals reactive than others?

Chemistry
2 answers:
Naddik [55]3 years ago
7 0
<span> some elements have their outer electrons more tightly bound than others. Those who have less tightly bound electrons are more reactive. After this it gets more complex in explaining why they are bound with different strengths. </span>
ruslelena [56]3 years ago
6 0
<span> it has to do with how tightly held the most reactive electrons are  in general the closer the  valence electrons are to nucleus the more tightly it is held </span>
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I need help with number 8 please help ASAP.
Rzqust [24]

Answer:

33.33% = 33%

Explanation:

MgCO3(s) + 2HCl (aq) --> MgCl2(aq) + H20(l) + CO2(g)

1 mole of MCO3 will produce → 1 mole of CO2

We need to get the number of mole of CO2:

and when we have 0.22 g of CO2, so number of mole = mass / molar mass

Moles = 0.22 g / 44 g/mol = 0.005 mole

Moles of Mg = moles of CO2 = 0.005 mole

Mass of Mg = moles * molar mass

= 0.005 * 84 /mol = 0.42 g

Percent of MgCO3 by mass of Mg = 0.42 g / 1.26 * 100

=33.33 %

8 0
3 years ago
The fact that water boils at 100° C is an example of a(n)
Vikki [24]
The answer will be physical change
8 0
3 years ago
What is the acceleration of a 50kg object pushed with a force of 500 Newton’s
olasank [31]

Answer:

<h2>10 m/s²</h2>

Explanation:

The acceleration of an object given it's mass and the force acting on it can be found by using the formula

a =  \frac{f}{m} \\

f is the force

m is the mass

From the question we have

a =  \frac{500}{50}  =  \frac{50}{5}  = 10 \\

We have the final answer as

<h3>10 m/s²</h3>

Hope this helps you

5 0
3 years ago
Please help ASAP and please don’t put random stuff for points I actually need help so please
olga2289 [7]

Answer:

Nobel Gasses

Explanation:

3 0
3 years ago
Please help and show work, i will mark you brainlest
Natali [406]

Answer:

7x-2(3-4)-2

Pls help

Explanation:

8 0
3 years ago
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