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N76 [4]
3 years ago
14

Please help it’s due by midnight I’ll mark you brainiest if you’re able to help

Chemistry
1 answer:
kakasveta [241]3 years ago
5 0

Answer:

bbbbbbbbbbbbbbbbbbbbbbbbb

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Match these items. 1. kg measurement of area 2. cm 2 measurement of length 3. L measurement of mass 4. m measurement of volume
Phoenix [80]

Answer:

Kg measurement of volume.

cm measurement of area

L measurement of length

m measurement of maes

4 0
3 years ago
NH4+H2O →NH3+H3O<br><br> Which one is acting weaker base?
Nataliya [291]

Answer:

NH3

Explanation:

In solution, they are in equilibrium. NH4+ acts as a bronsted Lowry acid and donates an H to become NH3, and NH3 acts as a bronsted lowry base and accepts an H. In this pair, NH3 is a weak base, which gets its basic character due to the presence of lone pair of nitrogen and its ability to donate it.

8 0
2 years ago
Assume reaction N (g )space plus O (g )rightwards arrow N O (g )occurs in high layers of the atmosphere. What is the H subscript
8090 [49]

Answer:

Kindly check the explanation section.

Explanation:

From the description given in the question above, that is '' H subscript f to the power of degree of the reaction" we have that the description matches what is known as the heat of formation of the reaction, ∆fH° where the 'f' is a subscript.

In order to determine the heat of formation of any of the species in the reaction, the heat of formation of the other species must be known and the value for the heat of reaction, ∆H(rxn) must also be known. Thus, heat of formation can be calculated by using the formula below;

∆H(rxn) = ∆fH°( products) - ∆fH°(reactants).

That is the heat of formation of products minus the heat of formation of the reaction g specie(s).

Say heat of formation for the species is known as N(g) = 472.435kj/mol, O(g) = 0kj/mol and NO = unknown, ∆H°(rxn) = −382.185 kj/mol.

−382.185 = x - 472.435kj/mol = 90.25 kJ/mol

5 0
3 years ago
Determine the concentration of a solution (M) made by dissolving 18.8 g of sodium chloride (NaCl) in 750.0 mL of solution.
Viefleur [7K]

Answer:

0.429 M

Explanation:

To find the molarity, you need to (1) convert grams to moles (using the molar mass), then (2) convert mL to L, and then (3) calculate the molarity (using the molarity ratio).

(Step 1)

Molar Mass (NaCl): 22.990 g/mol + 35.453 g/mol

Molar Mass (NaCl): 58.443 g/mol

18.8 grams NaCl               1 mole
--------------------------  x  ------------------------  =  0.322 moles NaCl
                                     58.443 grams

(Step 2)

1,000 mL = L

 750.0 mL                1 L
------------------  x  -----------------  =  0.7500 L
                            1,000 mL

(Step 3)

Molarity (M) = moles / volume (L)

Molarity = 0.332 moles / 0.7500 L

Molarity = 0.429 M

5 0
2 years ago
Write the empirical formula of at least four binary ionic compounds that could be formed from the following ions:
Mazyrski [523]
Ionic compounds are the compounds consists of positive and negative ions.
<span>Zn(2+):------
</span><span>ZnBr2:  
ZnS:
</span>Al(+3):------
Al203
Al2(SO4)^3
<span>Cl:(1-)
NaCl </span>
7 0
4 years ago
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