Atoms clump together

The reusable booster rockets of the U.S. space shuttle use a mixture of aluminum and ammonium perchlorate for fuel. A possible e

Klio2033 [76]

Answer:

0.2298kg of Al

Explanation:

From the equation of reaction

3 moles of Al (81g) is required to mix with 3 moles of NH4ClO4 (352.5g)

Mass of Al required in the fuel mixture for every kilogram (1000g) of NH4ClO4 = 1000×81/352.5 = 229.8g = 229.8/1000 = 0.2298kg

3 0

3 years ago

Mass of moist aggregate sample as brought to the laboratory: 5,306 grams Mass of oven dried aggregate: 5,229 grams Mass of aggre

Lerok [7]

Answer:

a. 2.748

b. 68.91

c. 1.45%

d. 37.84%

Explanation:

To determine the:

a. The aggregate's bulk Saturated Surface Dry specific gravity

Given:

The mass of the moist aggregate sample is 5,229 g.

The mass of the oven-dried aggregate is 5,306 g.

The mass of the aggregate submerged in water is 5,229 g.

The mass of the Saturated Surface Dry aggregate is 3,298 g.

The aggregate's bulk SSD specific gravity =the dry weight ÷ ( the SSD weight - the submerged weight)

Given:

The mass of the oven-dried aggregate is 5,306 g.

The mass of the Saturated Surface Dry aggregate is 3,298 g.

The mass of the aggregate submerged in water is 5,229 g.

= 5,306 ÷ ( 3,298 - 5,229)

= 5,306 ÷ 1,931 = 2.748

b. The aggregate appearance specific gravity

the aggregate apparent specific gravity = the dry weight ÷ (the dry weight - the submerged weight)

Given:

The mass of the oven-dried aggregate is 5,306 g.

The mass of the aggregate submerged in water is 5,229 g

The aggregate apparent specific gravity = 5,306 ÷ (5,306 - 5,229)

The aggregate apparent specific gravity = 68.91

c. The moist content of stockpile aggregate

The moisture content of stockpile aggregate = ( the moist aggregate weight - the dry weight) ÷ the dry weight

Given:

The mass of the moist aggregate sample is 5,229 g.

The mass of the oven-dried aggregate is 5,306 g

The moisture content of stockpile aggregate = (5,229 - 5,306) ÷ 5,306

The moisture content of stockpile aggregate = 0.0147 x 100% (when expressed in percentage) = 1.45%

d. Absorption

Absorption = (mass of the Saturated Surface Dry aggregate - mass of the oven-dried aggregate) ÷ mass of the oven-dried aggregate x 100%

Given:

The mass of the Saturated Surface Dry aggregate is 3,298 g

The mass of the oven-dried aggregate is 5,306 g.

Absorption = (3,298 - 5,306) ÷ 5,306 x 100% = 37.84%

8 0

3 years ago

Although both N2 and 02 are naturally present in the air we breathe, high levels of NO and NO2 in the atmosphere occur mainly in

joja [24]

Answer:

(a) Increasing the temperature adds heat which is a reactant shifting the equilibrium rightwards.

(b) Pressure has no effect since the change in the number of moles is zero.

Explanation:

Hello,

In this case, one could represent the given reaction as:

$N_2(g)+O_2(g)+ \Delta _rH \leftrightarrow 2NO$

Since it is endothermic. Thus, solving the (a) statement, one identifies the heat as a reagent, that is why the reaction cools down as it progress, therefore, by increasing the temperature, heat is added, that is, a reagent is added, which shifts the equilibrium rightwards, in other words, more NO is produced so its concentration increases.

Furthermore, for the (b) statement, since the change in the number of moles is zero, based on the stoichiometric coefficients as shown below:

$\Delta \nu =2-1-1=0$