2. List and explain the three steps for solving a numeric problem.

Type the correct answer in the box. Express your answer to three significant figures. Calcium nitrate reacts with sodium phospha

RoseWind [281]

6.07 grams is the theoretical yield of calcium phosphate (Ca₃(PO₄)₂).

<h3>How we calculate mass from moles?</h3>

Mass of any substance can be calculated by using moles as:

n = W/M, where

W = required mass

M= molar mass

Given chemical reaction is:

3Ca(NO₃)₂ + 2Na₃PO₄ → 6NaNO₃ + Ca₃(PO₄)₂

From the stoichiometry it is clear that:

3 moles of Ca(NO₃)₂ = produce 1 mole of Ca₃(PO₄)₂

Given mass of Ca(NO₃)₂ = 96.1g

Mole of Ca(NO₃)₂ = 96.1g/164g/mol = 0.5859moles

So, 0.5859 moles of Ca(NO₃)₂ = produce 0.5859×1/3 = 0.0196 moles of Ca₃(PO₄)₂

Required mass of Ca₃(PO₄)₂ will be calculated by using moles as:

W = 0.0196mole × 310g/mole = 6.07 grams

Hence, 6.07 grams is the theoretical yield of calcium phosphate.

To know more about moles, visit the below link:

brainly.com/question/15373263

7 0

2 years ago

Oxycodone (C18H21NO4), a narcotic analgesic, is a weak base with pKb = 5.47. Calculate the pH of a .00500 M oxycodone solution.

Ganezh [65]

Answer:

pH = 10.11

Explanation:

Hello there!

In this case, since it is possible to realize that this base is able to acquire one hydrogen atom from the water:

$C_{18}H_{21}NO_4+H_2O\rightleftharpoons C_{18}H_{21}NO_4H^+OH^-$

We can therefore set up the corresponding equilibrium expression:

$Kb=\frac{[C_{18}H_{21}NO_4H^+][OH^-]}{[C_{18}H_{21}NO_4]}$

Which can be written in terms of the reaction extent, $x$ :

$Kb=\frac{x^2}{0.00500M-x}=3.39x10^{-6}$

Thus, by solving for $x$ we obtain:

$x_1=-0.000132M\\\\x_2=0.0001285M$

However, since negative solutions are now allowed, we infer the correct $x$ is 0.0001285 M; thus, the pOH can be computed:

$pOH=-log(x)=-log(0.0001285)=3.89$

And finally the pH:

$pH=14-pOH=14-3.89\\\\pH=10.11$

Best regards!

5 0

3 years ago

A sample of sodium hydroxide (NaOH) has a mass of 160. 0 g. The molar mass of NaOH is 40. 00 g/mol. How many moles of NaOH does

Andrew [12]

4 moles of NaOH is present in the given 160 grams of NaOH.

<h3>How we calculate moles?</h3>

Moles of any substance will be calculated as:

n = W/M, where

W = given mass of NaOH = 160 grams (given)

M = molar mass of NaOH = 40 g/mole

Moles of NaOH is calculated as:

n = 160g / 40g/mol = 4 moles

Hence, moles of sodium hydroxide (NaOH) is 4 moles.

To know more about moles, visit the below link:

brainly.com/question/24322641

6 0

3 years ago

A mylar balloon is filled with helium gas to a pressure of 107 kPa when the temperature is 22°C. If the temperature changes to 4

brilliants [131]

Answer:

Explanation:

To solve this problem, we have to remember the ideal gas theory. We going to use the Gay Lussac Law.

The equation is:

PiTo = PoTi

Where:

<em>Pi =initial pressure</em>

<em>Po = final pressure</em>

<em>Ti = initial temperature</em>

<em>To = final temperature</em>

Let's use this equation and replace the values:

<em />

You can use the units as the problem gave you.

Using the Gay Lussac law:

107 kPa x 45 °C = Po x 22°C

Po = (4,815 kPa°C / 22°C) = 218.86 kPa

Po = 218 kPa

5 0

3 years ago

Why is the sky blue?

mamaluj [8]

Answer:

bacause god was like nah we don't play that game around here so he was like ig blue my fav color ;)

Explanation:

6 0

3 years ago