3 years ago

You have prepared a 1.0 M solution of CaCl2 in the laboratory.

Chemistry

1 answer:

Ratling [72]3 years ago

6 0

It’s C I think and I’m not sure

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Which element would lose electrons during ionic bonding choose all that apply

yawa3891 [41]

Answer:

All of them!

Explanation:

Since Mg, Li, Ca, and Cs are all in groups 1 and 2 of the periodic table, they are alkali/alkaline earth metals and will all lose electrons during ionic bonding.

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3 years ago

Select the answer that lists the radiation waves in order of increasing

finlep [7]

Answer:

Concept: Radiology & Chemistry

Energy waves are judged based on their wave length, which is measures from one "hump" to the next
In order from least to greatest, aka increasing: Radio Waves, infrared waves, visible light, UV, x-Ray, and Gamma
Give brainlist and rate positively

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3 years ago

By the way...... what do those symbols for the elements have in common (for number 7-11): Pb, Au, Cu, Hg, Na ? *

Keith_Richards [23]

Answer:

those have symbols for their Latin or Greek name

Explanation:

hope it helps

8 0

2 years ago

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the mass of one hydrogen atom is 1.67x10^-27 kg. A cylinder contains 3.01x10^23 hydrogen atoms. What is the mass of the hydrogen

VladimirAG [237]

Multiply 1.67x10^-27 by 3.01x10^23

5 0

3 years ago

The decomposition of NI3 to form N2 and I2 releases −290.0 kJ of energy. The reaction can be represented as 2NI3(s)→N2(g)+3I2(g)

EastWind [94]

Answer:

-7.34 kilo Joules is the change in enthaply when 20.0 grams of nitrogen triiodide decomposes.

Explanation:

Mass of nitrogen triiodide = 20.0 g

Moles of nitrogen triiodide = $\frac{20.0 g}{395 g/mol}=0.05063 mol$

$2NI_3(s)\rightarrow N_2(g)+3I_2(g), \Delta H_{rxn}=-290.0 kJ$

According to reaction, 2 moles of nitrogen triiodide gives 290.0 kilo Joules of heat on decomposition ,then 0.05063 moles of nitrogen triiodide will give :

$\frac{-290.0 kJ}{2}\times 0.05063=-7.34 kJ$

-7.34 kilo Joules is the change in enthaply when 20.0 grams of nitrogen triiodide decomposes.

3 0

3 years ago