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Misha Larkins [42]
2 years ago
12

A metallurgist is making an alloy that consists of 325 grams of chromium (Cr) and 2.5 kg of iron (Fe). Find the total mass of th

e alloy in kg
Chemistry
1 answer:
Darya [45]2 years ago
5 0

Answer:- Mass of the alloy is 2.8 kg.

Solution:- Mass of Cr in the alloy is 325 g and mass of Fe in the alloy is 2.5 kg. Mass of alloy would be the sum of masses of constituent metals.

Masses of the metals are not in the same units. So, we need to make the units equal. The want answer in kg so let's convert mass of Cr from g to kg.

Since, 1000 g = 1 kg

So, 325g\frac{1kg}{1000g}

= 0.325 kg

Mass of alloy = mass of Cr + mass of Fe

mass of alloy = 0.325 kg + 2.5 kg = 2.825 kg

If we consider significant figures then as per the rules, the answer should not have more than one decimal place.

So, 2.825 kg is round off to 2.8 kg and hence the mass of the alloy is 2.8 kg.

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someone pls help me with my chemistry test plsss my teacher changes the questions so I can't search them up. its 21 questions so
shusha [124]

Answer:

Correct option is

B

5 liters of CH

4

(g)NO

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No. of molecules=

22.4

5

mol=

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5

×N

A

molecules

A) 5ℊ of H

2

(g)

No. of moles=

2

5

mol=

2

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×N

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molecules

B) 5l of CH

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(g)

No. of moles of CH

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=

22.4

5

mol=

22.4

5

N

A

molecules

C) 5 mol of O

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molecules

D) 5×10

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molecules of CO

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Therefore, option B is correct.

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c. salty.

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From the question,

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Therefore , the resulting solution would taste like salt.

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