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3 years ago

List the exceptions to Metals showing a high density?

Chemistry

1 answer:

Bumek [7]3 years ago

7 0

Answer:

Osmium, 22.6 g/cc.

Iridium, 22.4 g/cc.

Platinum, 21.45 g/cc.

Rhenium, 21.2 g/cc.

Uranium, 20.2 g/cc.

these are are metals having a high density

Explanation:

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Answer:

yes

Explanation:

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3 years ago

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Lactose is disaccharide ; which monosaccharides are present in it

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Answer:

Lactose, the disaccharide of milk, consists of galactose joined to glucose by a β-1,4-glycosidic linkage. Lactose is hydrolyzed to these monosaccharides by lactase in human beings.

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3 years ago

An aluminium kettle weighs 1.05 Kg.

Kipish [7]

Answer:Explained

Explanation:

Given

mass of aluminium kettle( $m_k$ )=1.05 kg

(a)Heat capacity of the kettle=Heat capacity of Aluminium

$C_{Al}=0.9 J/gm-K$

(b)Heat is required to increase the temperature of this kettle from $23^{\circ} to 99 ^{\circ}$

$Q=m_kc_k\Delta T$

$Q=1.05\times 0.9\times 1000\times \left ( 99-23\right )$

Q=71.82 kJ

(c)If kettle contains water 1.25 L of water i.e. 1.246 kg of water then heat required to raise the temperature from 23 to 99

$Q=m_kc_k\left ( \Delta T\right )+m_wc_w\left ( \Delta T\right )$

$Q=1.05\times 0.9\times 1000\times \left ( 99-23\right )+1.246\times 4.184\times 1000\times \left ( 99-23\right )$

Q=71.82+396.20=468.028 kJ

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4 years ago

Who discovered infrared light

pishuonlain [190]

<span>Sir Frederick William Herschel did.</span>

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Which of the following would you expect to be ionic?

belka [17]

Answer:

H20 somewhat ionic as well as covalent

SO2 is covalent

K2O is ionic

O2 ionic with somewhat covalent bonds

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