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3 years ago

Which of these elements reacts rapidly when dropped in water?

Chemistry

2 answers:

seraphim [82]3 years ago

8 0

Technically it's grp 1 elements...the answer is ribidium Rb

vazorg [7]3 years ago

5 0

Answer : The correct option is, (a) rubidium (Rb)

Explanation :

The general trend of the reactivity of the metal is,

The reactivity of the metals increases as we go down in the periodic table and the reactivity of the metals decreases as we go from left to right in the periodic table.

Therefore, the reactivity of metal in decreasing order will be,

Rb > Mg > Co > Cd > Ar

As per question, when the given elements dropped in water then the rubidium (Rb) is element which is most reactive that reacts rapidly with the water.

Hence, the element reacts rapidly with water is, rubidium (Rb).

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There are 342 g of sucrose in 1.00 mol of sucrose. What is the molar concentration (molarity) of a solution containing 171 g suc

AVprozaik [17]

For the answer to the question above, use these formulas in solving your problem and as a guide.
<span>
MM = 342 (g/mol) </span>

<span>171 (g) / 342(g/mol) = x mol of sucrose </span>
<span>x moles of sucrose/ 1.25 L = Molarity of soultion

</span>I hope I helped you with your problem. Have a beautiful day!

7 0

3 years ago

Each astronaut produces 8.8 × 102 g CO2 per day that must be removed from the air on the shuttle. If a typical shuttle mission i

suter [353]

The reaction of removing CO2 using LiOH is the following:

2 LiOH + CO2 -----> Li2CO3 + H2O

By solving the amount of CO2 the LiOH can scrub:

(3.50 × 10^4 g LiOH) (1 mol LiOH/ 24 g LiOH) ( 1 mol CO2 / 2 mol LiOH) ( 44 g CO2 /1 mol CO2) = 32, 083.33 g CO2 it can scrub

<span>Since number of astronaut = 32, 083.33 g / 9 (8.8 × 10^2) = 4 astronaut</span>

7 0

3 years ago

Read 2 more answers

What properties are those that describe what happens when a substance reacts with another substance? catalyst properties chemica

8090 [49]

............ chemical properties.........

5 0

3 years ago

Read 2 more answers

Why LED is better option for testing the conduction of electricity?

Anettt [7]

Answer:

Led is a light-emitting diode, a semiconductor diode that glows when a voltage is applied. So, there is always a sure result of whether a substance conducts electricity or not as the light glows. That is why it is a better option for testing conduction of electricity.

Explanation:

5 0

3 years ago

When a certain amount of MgF2 is added to water, the freezing point lowers by 3.5° C. What was the molality of the

Leni [432]

The molality of the solution is obtained as 0.63 m.

<h3>What is the freezing point?</h3>

The freezing point is the temperature at which the liquid is converted into solid.

We know that;

ΔT = 3.5° C

K = 1.86° C/m

i = 3

m = ?

Thus;

ΔT = K m i

m = ΔT/K i

m = 3.5° C/ 1.86° C/m * 3

m = 0.63 m

Learn more about freezing point:brainly.com/question/3121416

#SPJ1

6 0

2 years ago