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sashaice [31]
3 years ago
14

What element behaves MOST like magnesium (Mg)? A) S B) Si C) Sn D) Sr

Chemistry
2 answers:
Varvara68 [4.7K]3 years ago
7 0
Sr Google confirmed it.
tatyana61 [14]3 years ago
3 0

Strontium (Sr). Elements in the same group of the periodic table have similar characteristics.

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If 7.50 g of methane gas (CH4) is in a 3250 mL container at 25° C, what is the pressure
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Explanation: the temperature will rise as more methane is added

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2 years ago
A layer of sandstone is found on top of a layer of shale. What most likely happened in this area?
storchak [24]

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Mud was deposited first, then sand.

Explanation:

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4 0
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1. Air shows the property of<br> a) N<br> b) 02<br> c) Both a) and b)<br> d) None of these
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6 0
2 years ago
Read 2 more answers
A 100.0-mL sample of 1.00 M NaOH is mixed with 50.0 mL of 1.00 M H2SO4 in a large Styrofoam coffee cup calorimeter fitted with a
worty [1.4K]

Answer:

THE ENTHALPY CHANGE IN KJ/MOLE IS +114 KJ/MOLE.

Explanation:

Heat = mass * specific heat capacity * temperature rise

Total volume = 100 + 50 = 150 mL

Total mass = density * volume

Total mass = 1 * 150 mL = 150 g

So therefore, the heat evolved during the reaction is:

Heat = 150 * 4.18 * ( 31.4 - 22.3)

Heat = 150 * 4.18 * 9.1

Heat = 5705.7 J

Equation for the reaction:

2 NaOH(aq) + H2SO4(aq) → Na2SO4(aq) + 2 H2O(l)  

From the equation, 2 moles of NaOH reacts with 1 mole of H2SO4 to produce 1 mole of Na2SO4 and 2 moles of water

50 mL of 1 M of H2SO4 contains

50 * 1 / 1000 mole of acid

= 0.05 mole of acid

The production of 1 mole of water evolved 5705.7 J of heat and hence the enthalpy changein kJ per mole will be:

0.05 mole of H2SO4 produces 5705.7 J of heat

1 mole of H2SO4 will produce 5705.7 / 0.05 J

= 114,114 J / mole

In kj/mole = 114 kJ/mole.

Hence, the enthalpy change of the reaction in kJ /mole is +114 kJ/mole.

5 0
3 years ago
How many molecules of excess reactant remain after the reaction is complete?
vazorg [7]
8


It’s 8 bc I said it was 8 ;)
5 0
3 years ago
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