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3 years ago

Do all alloys contain only two metals?

Chemistry

1 answer:

riadik2000 [5.3K]3 years ago

7 0

<span>No. Aluminum has more than two.</span>

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What is the mass of 2.15 liters of N2 gas at STP?

ivann1987 [24]

Explanation:

mole number =mass/molar mass

mass=mole number × molar mass

mass= (volume of gas/volume at stp)molar mass

mass=(2.15/22.4)28

mass=2.69g

pls give brainliest

6 0

3 years ago

Which of the following are second-order reactions? a. C2H6 → 2 CH3 b. 2 N2O5 → 4 NO2 + O2 c. 2 HI → H2 + I2 d. 2 N2O → 2 N2 + O2

Klio2033 [76]

Answer:

The answer is b, c, d, e

Explanation:

b. 2 N2O5 → 4 NO2 + O2

r = k [N2O5]^2 --> Second-order regarding global reaction

c. 2 HI → H2 + I2

r = k [HI]^2 --> Second-order regarding global reaction

d. 2 N2O → 2 N2 + O2

r = k [N2O]^2 --> Second-order regarding global reaction

e. 2 NO2 → 2 NO + O2

r = k [NO2]^2 --> Second-order regarding global reaction

8 0

3 years ago

Consider the reaction of ethyl acetate with sodium hydroxide: CH3COOC2H5(aq)+NaOH(aq)⇌CH3COONa(aq)+C2H5OH(aq) The reaction is fi

Alexus [3.1K]

Answer: The rate law is $rate=k[CH_3COOC_2H_5]^1[NaOH]^1$

Explanation:

Rate law says that rate of a reaction is directly proportional to the concentration of the reactants each raised to a stoichiometric coefficient determined experimentally called as order.

For the given reaction:

$CH_3COOC_2H_5(aq)+NaOH(aq)\rightleftharpoons CH_3COONa(aq)+C_2H_5OH(aq)$

k= rate constant

Rate law: $rate=k[CH_3COOC_2H_5]^x[NaOH]^y$

For the given rate law:

y =1 = order with respect to $NaOH$

n = total order = 2

2= (x+y)

2= (x+1)

x= 1

Thus order with respect to $CH_3COOC_2H_5$ is 1 and rate law is : $rate=k[CH_3COOC_2H_5]^1[NaOH]^1$

6 0

3 years ago

Calculate the volume of an

lions [1.4K]

Answer:

The formula for the volume of a solid rectangle is width x depth x height. Divide the volume by the product of the length and width to calculate the height of a rectangular object. For this example, the rectangular object has a length of 20, a width of 10 and a volume of 6,000.

Explanation:

3 0

3 years ago

A saturated solution of potassium chlorate is dissolved in 100g of water. If the saturated solution is cooled from 90 degrees Ce

dedylja [7]

Mass would crystallize out : 24 g

<h3>Further explanation </h3>

Solubility is the maximum amount of a substance that can dissolve in some solvents. Factors that affect solubility

1. Temperature:
2. Surface area:
3. Solvent type:
4. Stirring process:

We can use solubility graph to solve this.

solubility KClO₃ at 90°C=52 g

solubilty KCl₃ at 60°C= 28 g

Mass would crystallize out = 52 - 28 =24 g

4 0

3 years ago