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avanturin [10]
3 years ago
8

A sample of helium gas is heated from 20.0°C to 40.0°C. This

Chemistry
1 answer:
Montano1993 [528]3 years ago
8 0

Answer:

C. 548mL

Explanation:

Attached is an image of the explanation. Hope this helps!

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Is o-toluic acid soluble in ether, NaOH?, Is Napthalene soluble in NaOH?
natima [27]
Yes, o-toluic acid is soluble in ether as ether is slightly polar and it is soluble in NaOH because it is likely to form soluble compounds with it.

Naphthalene is insoluble in NaOH.
8 0
3 years ago
The change in enthalpy is the change in heat energy of a reaction and is calculated by (Hint: Hess' Law): Group of answer choice
Stolb23 [73]

Answer:

d. Sum of product enthalpies minus the sum of reactant enthalpies

Explanation:

The standard enthalpy change of a reaction (ΔH°rxn) can be calculated using the following expression:

ΔH°rxn = ∑n(products) × ΔH°f(products) - ∑n(reactants) × ΔH°f(reactants)

where,

ni are the moles of products and reactants

ΔH°f(i) are the standard enthalpies of formation of products and reactants

8 0
3 years ago
How many sigma bonds does NBr3 have?
Kisachek [45]

Answer:

It has 3 sigma bonds

Explanation:

A sigma bond is a covalent interaction between two atoms, these bonds are the strongest type of covalent bonds and they are formed by the overlap of atomic orbitals.

The nitrogen is bond to the bromine atoms through sigma bonds, which means that exist 3 sigma bonds in the molecule.

this molecule has a trigonal pyramid geometry due to the free pair of nitrogen electrons.

5 0
2 years ago
A substance made of metal atoms only?
SVEN [57.7K]
It has to be a metal, it can't be anything else.
5 0
3 years ago
What is removed from pyruvate during its conversion into an acetyl group?
enot [183]

Answer:

carbon dioxide

Explanation:

8 0
3 years ago
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