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3 years ago

Help please i beg someone answer and explain

Chemistry

1 answer:

Novosadov [1.4K]3 years ago

3 0

Answer:

Q,N,1) lithium + hydrochloric -> lithium chloride + Hydrogen.

word equation ( 2li + 2HCl -> 2liCl + H2)

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1. Classify each of the following as a homogeneous or heterogeneous substance.

Olegator [25]

a. iron ore - heterogeneous substance

(it contains a mixture of iron oxides)

b. quartz - homogeneous substance

(it is the crystalline silicon dioxide SiO₂, which is a very pure form of SiO₂)

c. granite - heterogeneous substance

(it as mixture of different oxides, mainly aluminium and silicon oxides)

d. energy drink - heterogeneous substance

(a mixture of water, sugar, carbon dioxide and different substances that may boost concentration, like caffeine)

e. oil-and-vinegar salad dressing - heterogeneous substance

(this salad dressing of oil and vinegar is composed of unsaturated triglycerides, acetic acid and water)

f. salt - homogeneous substance

(sodium chloride NaCl)

g. rainwater - homogeneous substance

(assuming the the atmosphere is clean, it is just pure water H₂O)

h. nitrogen - homogeneous substance

(it is the main component of air and it is a diatomic molecule N₂)

7 0

3 years ago

Read 2 more answers

Pure magnesium metal is often found as ribbons and can easily burn in the presence of oxygen. When 3.97 g of magnesium ribbon bu

taurus [48]

Answer:

The balanced chemical equation is given as:

$2Mg(s)+O_2(g)\rightarrow 2MgO(s)$

Explanation:

When magnesium metal burns in presence of oxygen it gives white color powdered compound called magnesium oxide.

The balanced chemical equation is given as:

$2Mg(s)+O_2(g)\rightarrow 2MgO(s)$

According to reaction, 2 moles of magnesium metal when reacts with 1 mole of oxygen gas it gives 2 moles of solid magnesium oxide.

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2 years ago

9A. A sample of hydrogen at 1.56 atm had it's pressure decreased to 0.73

Jlenok [28]

Answer:idk

Explanation:

Idk

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3 years ago

What are the components of a nucleotide?

Eva8 [605]

Answer:

a nitrogen containing base, a pentose (five-carbon) sugar, and one or more phosphate groups

Explanation:

found this information on, newworldencyclopedia.com

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3 years ago

Something that can be broken down by living organisms is

Aloiza [94]

The answer is A: biodegradable.

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3 years ago