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3 years ago

Which property provides the best evidence that the unknown substance is a solid

Chemistry

1 answer:

agasfer [191]3 years ago

7 0

The shape would be the answer if it is taking up space it's a liquid if if it stays in the area of space it's a solid

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The standard enthalpy of formation of Ca2+ (g) (∆H = 1934 kJ/mol)

Alex73 [517]

Answer:

see explanation

Explanation:

The process of ionization to produce cations is endothermic. For formation of Ca⁺² two ionization steps need be illustrated as follows...

1st ionization step: Ca° + 590Kj => Ca⁺ + e⁻

2nd ionization step: Ca⁺ + 1151Kj => Ca⁺² + e⁻

__________________________________-

Net Ionization Rxn: Ca° + 1741Kj => Ca⁺² + 2e⁻

6 0

3 years ago

I need help with unit conversion

saw5 [17]

Answer:

what is it?

Explanation:

you haven't said?

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3 years ago

An automobile tire contains air at 320.×103 Pa at 20.0 ◦C. The stem valve is removed and the air is allowed to expand adiabatica

NISA [10]

Answer:

6.15.3 k

Explanation:

From the question we can see that

q = 0, Δu = w

Then,

$T_f = \frac{C_{V,m}+RP_{ext}P_i}{C_{V,m}+RP_{ext}P_f} T_i$

putting values wet

= $\frac{2.5\times 8.314+8.314\left(10^5\right)\left(3.20\times 10^5\right)}{2.5\times 8.314+\left(8.314\right)\left(10^5\right)\left(10^5\right)}\times \:293$

T_f = 615.3 K

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3 years ago

How should you remove a beaker from a hot plate after heating it?.

rewona [7]

Answer:

Explanation:

you will have to grabe a towle or a meten and take it off

3 0

2 years ago

What is a covalent bond?

Natali5045456 [20]

A bond between two atoms that SHARE electrons

4 0

3 years ago