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3 years ago

Consider the reaction X + Z ?

Chemistry

1 answer:

lions [1.4K]3 years ago

8 0

Answer:

X2Z3

Explanation:

Based on the clues, X is a metal and Z is a non-metal.

X could be aluminum and Z would need to be an element from the oxygen family.

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The element whose neutral isolated atoms in the ground state have three half filled orbital is

jolli1 [7]

One would be phosporous whose configuration is 1s2 2s2 2p6 3s2 3p3

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3 years ago

Which property can be used to tell gold and pyrite apart?

zubka84 [21]

Answer:

D. Malleability

Explanation:

Gold is made up of the element Au and it is a metal.

Pyrite is iron sulfide and it is a non-metal.

They have very similar appearance to such an extent that pyrite is widely called the fool's gold.
To distinguish between the two, we simply explore their metallic properties.
Gold is malleable. Pyrite is not. It will crumble under pressure.

6 0

3 years ago

During a titration the following data were collected. A 50.0 mL portion of an HCl solution was titrated with 0.500 M NaOH; 200.

Travka [436]

<u>Answer:</u> The mass of HCl present in 500 mL of acid solution is 36.5 grams

<u>Explanation:</u>

To calculate the concentration of acid, we use the equation given by neutralization reaction:

$n_1M_1V_1=n_2M_2V_2$

where,

$n_1,M_1\text{ and }V_1$ are the n-factor, molarity and volume of acid which is HCl

$n_2,M_2\text{ and }V_2$ are the n-factor, molarity and volume of base which is NaOH.

We are given:

$n_1=1\\M_1=?M\\V_1=50.00mL\\n_2=1\\M_2=0.500M\\V_2=200.mL$

Putting values in above equation, we get:

$1\times M_1\times 50.00=1\times 0.500\times 200\\\\M_1=\frac{1\times 0.500\times 200}{1\times 50.00}=2M$

To calculate the mass of solute, we use the equation used to calculate the molarity of solution:

$\text{Molarity of the solution}=\frac{\text{Mass of solute}\times 1000}{\text{Molar mass of solute}\times \text{Volume of solution (in mL)}}$

Molar mass of HCl = 36.5 g/mol

Molarity of solution = 2 M

Volume of solution = 500 mL

Putting values in above equation, we get:

$2mol/L=\frac{\text{Mass of solute}\times 1000}{36.5g/mol\times 500}\\\\\text{Mass of solute}=\frac{2\times 36.5\times 500}{1000}=36.5g$

Hence, the mass of HCl present in 500 mL of acid solution is 36.5 grams

4 0

3 years ago

Which of these humans activities is a serious threat to marine ecosystems

Paraphin [41]

Answer:

Pollution, non native species being introduced, and other human activities

Explanation:

Human activities affect marine ecosystems as a result of pollution, overfishing, the introduction of invasive species,and acidification, which all impact on the marine food web and may lead to largely unknown consequences for the biodiversity and survival of marine life forms.

5 0

3 years ago

Read 2 more answers

Citric acid is one component of some soft drinks. Suppose that 8 L of solution are made from 0.24 g of citric

olya-2409 [2.1K]

Answer:

0.0156

Explanation:

7 0

3 years ago