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3 years ago

Which of the following statements is true?

Chemistry

2 answers:

Gekata [30.6K]3 years ago

8 0

Answer:

respuesta número tres

dezoksy [38]3 years ago

4 0

Answer: Option D.

Mechanical and chemical digestion occur in the mouth but only chemical digestion occur in the stomach.

Explanation:

Digestion is the breakdown of larger food particles into smaller ones that can be absorb by the body and pass out the waste product or undigested food. There are two methods digestion occurs in the body and they are; mechanical and chemical digestion.

Mechanical digestion is the physical breakdown of food into smaller pieces. It begins in the mouth when food are chewed.

Chemical digestion involves the breakdown of food into nutrients. This begin in the mouth when food is mixed with saliva and it continue in the stomach where enzymes act on the food.

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Name gaseous element in period 2 group 16?

Sholpan [36]

Answer:

mark me as a brainlist answer

Explanation:

Oxygen

3 0

2 years ago

Can anyone answer 10.4? (45 points if correct)

otez555 [7]

Alpha is the -OH group at the anomeric position is down. beta is up

a. alpha
b. beta
c. beta
d. alpha

to draw the other anomer, just flip the OH at the anomeric position

3 0

3 years ago

Write the balanced chemical equations for the decomposition of solid calcium hydroxide into solid calcium (ii) oxide (lime) and

Lesechka [4]

Calcium oxide (CaO) or lime in solid form can be prepared from the decomposition of calcium hydroxide {Ca $(OH)_{2}$ in to lime (CaO) and water ( $H_{2}O$ at high temperature. The reaction is an endothermic reaction. That is heat is absorbed in this reaction process. One mole of calcium hydroxide decomposed into one mole of calcium oxide and one mole of water. The balanced reaction can be shown as-CaC $O_{3}$ (solid) → CaO (solid) + $H_{2}O$ (liquid). The heat of the reaction is (+) 63.7 kJ/mole of CaO.

3 0

3 years ago

A brass doorknob has a mass of 80grams and a volume of 10cubic centimeters. What is its density?

ki77a [65]

Density = mass/volume = 80 g/10cm³ = 8 g/cm³

5 0

3 years ago

A recessive gene is described as one that

djyliett [7]

Answer:

<h2>C) may be hidden </h2>

Explanation:

A gene is a unit of heredity which is transferred from parents to offspring and it control the traits.

Alternative form of gene are known as alleles.

Gene may be dominant or recessive

Dominant gene expresses in both homozygous as well as in heterozygous condition, while recessive gene expresses in homozygous condition only, when it present with dominant gene, its effect is hidden by dominant gene. Dominant gene is represented by capital letter while recessive gene is represented by small letter.

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3 years ago