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3 years ago

Chemical digestion would not be possible without _____, which speed up the rate of chemical reactions in your body?

Chemistry

2 answers:

Mashutka [201]3 years ago

7 0

Enzymes in our body increases the speed of chemical digestion.

Lera25 [3.4K]3 years ago

7 0

Enzymes are the catalysts in almost every chemical reaction in our body

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How do you calculate the number of valence electrons in an atom?

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To find the valence electrons in an atom, identify what group the element is in. An element in group 1A has 1 valence electron. For example, Li is in group 1A, so that means it has one valence electron. If the element is in group 2A, then it has two valence electrons.

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3 years ago

How many primary tectonic plates make up the surface of Earth?

dimaraw [331]

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3 years ago

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Which of the following are used to make predictions?

tatyana61 [14]

Answer:

Hypotheses

Explanation:

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2 years ago

Is gravity a matter??

algol13

Answer:

No, gravity isn't matter

Explanation:

Gravity is a force that attracts matter towards the center of a physical body with mass.

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3 years ago

Passing an electric current through a sample of water (H2O) can cause the water to decompose into hydrogen gas (H2) and oxygen g

Lerok [7]

The mass of water decomposed to produce 50 g oxygen has been 56.28 g. Thus, option D is correct.

The reaction for the decomposition of water has been:

$\rm 2\;H_2O\;\rightarrow\;H_2\;+\;O_2$

From the balanced equation, 2 moles of water decomposes to form 1 moles of hydrogen and 1 mole of oxygen.

The mass of oxygen produced has been 50 g. The moles of oxygen has been given by:

$\rm Moles=\dfrac{mass}{molar\;mass}$

The moles of oxygen has been:

$\rm Moles_O_2=\dfrac{50}{32}\;mol\\Moles_O_2=1.5625\;mol$

The moles of oxygen produced has been 1.5625 mol.

The moles of hydrogen decomposed has been given from the balanced chemical equation as:

$\rm 1 \;mole\;O_2=2\;mole\;H_2O\\1.5625\;mol\;O_2=1.5625\;\times\;2\;mol\;H_2O\\1.5625\;mol\;O_2=3.125\;mol\;H_2O$

The moles of hydrogen decomposes has been 3.125 mol.

The mass of hydrogen decomposed has been given by:

$\rm Mass=moles\;times\;molar\;mass\\Mass_{H_2O}=3.125\;\times\;18.01\;g\\Mass_{H_2O}=56.28\;g$

The mass of water decomposed to produce 50 g oxygen has been 56.28 g. Thus, option D is correct.

For more information about moles produced, refer to the link:

brainly.com/question/10606802

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2 years ago