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1 year ago

13

The energy recommendation that describes the proportions of calories that should come from carbohydrate, fat, and protein are th

e: ______.
a. ears
b. ais
c. amdrs
d. dris

1 answer:

Ne4ueva [31]1 year ago

7 0

Explanation:

what are you feeling now I am looking forward

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2 years ago

At 524 mm Hg and 35 °C, a sample of gas occupies a volume of 275 ml. The gas is transferred to a 325-ml flask and the temperatur

Deffense [45]

Answer:

400.197mmHg

Explanation:

P1V1 / T1 = P2V2 / T2

Where P1=524 mm Hg V1 =275 ml T1 = 35°C +273 = 308k

V2= 325-ml T2= 5°C+273 = 278k , P2= ?

Substituting the values into the formula.

524 mm Hg ×275 ml /308k = P2×325-ml/278k

Cross multiply

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2 years ago

A river flows from approximately 45° north latitude toward the equator, as shown in the diagram below. As the water molecules in

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3 years ago

Read 2 more answers

Lead(II) nitrate and ammonium iodide react to form lead(II) iodide and ammonium nitrate according to the reaction Pb(NO3)2(aq)+2

alina1380 [7]

Answer:

0.519 L of a 0.590M NH4I solution is required

Explanation:

Step 1: The balanced equation

Pb(NO3)2(aq) + 2NH4I(aq) → PbI2(s) + 2NH4NO3(aq)

<u>Step 2:</u> Given data

Molarity of NH4I = 0.590 M

Volume of Pb(NO3)2 = 225 mL = 0.225 L

Molarity of Pb(NO3)2 = 0.680 M

<u>Step 3</u>: Calculate number of moles Pb(NO3)2

Number of moles = Molarity * volume

Number of moles Pb(NO3)2 = 0.680 M * 0.225L

Number of moles Pb(NO3)2 = 0.153 moles

<u>Step 4:</u> Calculate moles of NH4I

For 1 mol Pb(NO3)2 consumed, we need 2 moles NH4I

For 0.153 moles of Pb(NO3)2, we have 0.306 moles of NH4I

<u>Step 6:</u> Calculate volumen of NH4I

Molarity = moles of NH4I / volume

0.590 M = 0.306 moles / volumen

volume =0.306 moles / 0.590M

volume = 0.519 L

0.519 L of a 0.590M NH4I solution is required

8 0

2 years ago