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3 years ago

The ___________________ in the mouth secrete enzymes which help prepare the food for digestion in the stomach.

2 answers:

8 0

The word that should be filled in the blank in order to complete the sentence, "The ______ in the mouth secrete enzymes which help prepare the food for digestion in the stomach." The answer would be saliva. Saliva contains salivary amylase that helps soften the food.

xenn [34]3 years ago

8 0

The salivary glands persent in the oral caity secretes wide range of enzymes that help immensely, in the digestion of the food. This includes, saliva, lysozymes, lingual lipase, and haptocorrin. There are two types of salivary glands: serous glands and mixed glands.

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An atom of nitrogen has seven electrons. Which diagram correctly represents the arrangement of these electrons?

gizmo_the_mogwai [7]

Answer:

Option C.

Explanation:

The arrangement of electrons in their orbital follows certain rules.

The Hund's rule practically explained how electrons are distributed in their orbitals.

The Hund's rule states that electrons distributed among the orbitals of the same shell singly (without partner) before pairing occurs.

In the filling of these electrons in their orbitals, we fill in the electron without pairing first because electrons tends to repel each other before filling with the opposite spin as shown in the attached photo.

8 0

3 years ago

. A Chemist wants to make 20moles of Hydrogen gas by combining Calcium with water. Balanced Chemical Reaction: 2 Ca(s) + 2H20 -&

german

Answer:

92 moles in 1 gram

hope this helps

3 0

2 years ago

Please help me answer 1-3 :) Don’t guess! I will give brainlst

Inessa05 [86]

Answer:

C, D, C

Explanation: For question 1. Turbines are made of metal and being constructed means they are non renewable. Wind and electricity are renewable resources. For question 2. A non renewable resource means that it takes a long time to produce. For question 3. Fresh water is a renewable resource but there is limited areas where freshwater is available and is getting used up faster than it can be replaced. It is a limited resource now.

8 0

3 years ago

The following two reactions are investigated in this experiment. Select the coefficients to obtain the correct balanced equation

Jobisdone [24]

Answer :

(1) The balanced chemical reaction will be,

$9NaHCO_3(aq)+2C_6H_8O_7(aq)\rightarrow 3CO_2(g)+5Na_3C_6H_5O_7(aq)+3H_2O(l)$

(2) The balanced chemical reaction will be,

$CaCO_3(aq)+2HCl(aq)\rightarrow CO_2(g)+CaCl_2(aq)+H_2O(l)$

Explanation :

Balanced chemical reaction : It is defined as the reaction in which the number of atoms of individual elements present on reactant side must be equal to the product side.

Part 1 :

The unbalanced chemical reaction is,

$NaHCO_3(aq)+C_6H_8O_7(aq)\rightarrow CO_2(g)+Na_3C_6H_5O_7(aq)+H_2O(l)$

This reaction is an unbalanced chemical reaction because in this reaction number of atoms are not balanced on both the sides.

In order to balance the chemical equation, the coefficient '9' put before the $NaHCO_3$ , the coefficient '2' put before the $C_6H_8O_7$ , the coefficient '5' put before the $Na_3C_6H_5O_7$ and the coefficient '3' put before the $CO_2\text{ and }H_2O$ then we get the balanced chemical equation.

The balanced chemical reaction will be,

$9NaHCO_3(aq)+2C_6H_8O_7(aq)\rightarrow 3CO_2(g)+5Na_3C_6H_5O_7(aq)+3H_2O(l)$

Part 2 :

The unbalanced chemical reaction is,

$CaCO_3(aq)+HCl(aq)\rightarrow CO_2(g)+CaCl_2(aq)+H_2O(l)$

This reaction is an unbalanced chemical reaction because in this reaction number of hydrogen and chlorine atoms are not balanced.

In order to balance the chemical equation, the coefficient '2' put before the $HCl$ then we get the balanced chemical equation.

The balanced chemical reaction will be,

$CaCO_3(aq)+2HCl(aq)\rightarrow CO_2(g)+CaCl_2(aq)+H_2O(l)$

3 0

3 years ago

A student predicted the reaction between hydrogen and oxygen gas would yield 125 of water. However, after measuring the water fo

Nataliya [291]

Percentage yield= (actual/theoretical)x100

So in this case the actual yield is 110 and the theoretical yield is 125.

So you would do =(110/125)x100
So the answer would be =88%

3 0

3 years ago