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3 years ago

correctly stated hypothesis for the below question. The correct formate is "if then because__"

Chemistry

1 answer:

ankoles [38]3 years ago

4 0

Answer:

That is the correct form for a hypothesis.

Explanation:

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In which part of the digestive system does a CHEMICAL change of the food first occur?

slavikrds [6]

A: mouth. Chemical digestion begins in the mouth when enzymes in saliva begin to break down carbohydrates. Most chemical changes in digestion occur in the small intestine. Large molecules of food are broken down into smaller molecules that can be absorbed by our cells.

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3 years ago

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Draw the Lewis Structure for NaCl

Trava [24]

Explanation:

The electronic configuration of sodium with Z = 11 is : 2, 8, 1

The electronic configuration of chlorine with Z = 17 is : 2, 8, 7

The Lewis structure is drawn in such a way that the octet of each atom is complete.

Thus, sodium losses one electron to chlorine and chlorine accepts this electron to form ionic bond.

Thus, the valence electrons are shown by dots in Lewis structure. The structure is shown in image below.

8 0

3 years ago

Plz someone help, really struggling

frez [133]

Answer:

22.9 Liters CO(g) needed

Explanation:

2CO(g) + O₂(g) => 2CO₂(g)

? Liters 32.65g

= 32.65g/32g/mol

= 1.02 moles O₂

Rxn ratio for CO to O₂ = 2 mole CO(g) to 1 mole O₂(g)

∴moles CO(g) needed = 2 x 1.02 moles CO(g) = 2.04 moles CO(g)

Conditions of standard equation* is STP (0°C & 1atm) => 1 mole any gas occupies 22.4 Liters.

∴Volume of CO(g) = 1.02mole x 22.4Liters/mole = 22.9 Liters CO(g) needed

___________________

*Standard Equation => molecular rxn balanced to smallest whole number ratio coefficients is assumed to be at STP conditions (0°C & 1atm).

6 0

3 years ago

True or False Decreasing the temperature and movement of particles will speed up the reaction rate.

marissa [1.9K]

I think it's True hope it helps

5 0

3 years ago

A sample of gas contains 0.1100 mol of N2(g) and 0.3300 mol of H2(g) and occupies a volume of 20.5 L. The following reaction tak

worty [1.4K]

Answer:

20.5 L

Explanation:

-The stoichiometric reaction of the 2 gases is:

$N_2_{(g)}+3H_2_{(g)}->2NH_3_{(G)}$

-We apply the combined gas law to determine the resultant volume of the ammonia gas formed:

$\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}\\\\\#But\\\\\frac{P_1}{T_1}=\frac{P_2}{T_2}\\\\\therefore V_1=V_2$

Since, the temperature and pressure remain constant, the volume of the ammonia gas formed is equal to the volume of the reactants.

Hence, the volume after the reaction is 20.5 L

6 0

3 years ago

correctly stated hypothesis for the below question. The correct formate is "if______ then______ because______"​

correctly stated hypothesis for the below question. The correct formate is "if then because__"