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3 years ago

HELP!!! I WILL MARK BRAINLIEST!!!

Chemistry

1 answer:

klemol [59]3 years ago

6 0

Answer:

it is asolution because and a solid can contain liquid,solid and gas

Explanation:

he components in a mixture are not chemically joined; they are just mixed.

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SOMEONE HELP ME PLEASE ILL GIVE BRAINLY

timurjin [86]

Answer:

It is less dense than oxygen gas.

Explanation:

Density is a physical property. Reactivity, flammability, and acid compounds are all chemical properties.

Hope that helps.

4 0

3 years ago

Calculate the pH of the solution formed when 45.0 mL of 0.100M NaOH solution is added to 50.0 mL of 0.100M CH3COOH (Ka for aceti

pav-90 [236]

Answer:

pH of soltion will be 5.69

Explanation:

The pH of the solution will be due to excessive acid left and the salt formed. Thus, it will form a buffer solution.

The pH of buffer solution is calculated from Henderson Hassalbalch's equation, which is:

$pH=pKa+log(\frac{[salt]}{[acid]} )$

$pKa=-log(Ka)$

$pKa=-log(1.8X10^{-5})=4.74$

The moles of acid taken :

$moles=molarityXvolume=0.1X50=5mmol$

The moles of base taken:

$moles=molarityXvolume=0.1X45=4.5mmol$

The moles of acid left after reaction :

$5-4.5=05mmol$

The moles of salt formed = 4.5mmol

Putting values in equation

$pH=pKa+log(\frac{[salt]}{[acid]} )=4.74+log(\frac{4.5}{0.5})=5.69$

8 0

3 years ago

How much energy is lost to condense 300. grams of steam at 100.C?

True [87]

Energy lost to condense = 803.4 kJ

<h3>Further explanation</h3>

Condensation of steam through 2 stages:

1. phase change(steam to water)

2. cool down(100 to 0 C)

1. phase change(condensation)

Lv==latent heat of vaporization for water=2260 J/g

$\tt Q=300\times 2260=678000~J$

2. cool down

c=specific heat for water=4.18 J/g C

$\tt Q=300\times 4.18\times (100-0)=125400$

Total heat =

$\tt 678000+125400=803400~J$

3 0

3 years ago

THE RIGHT ANSWER WILL RECIEVE A BRAINLEST AND POINTS!!!

Vika [28.1K]

<span>If you drop a bath bomb into water then it will start to fizz. It will fizz because there is a chemical reaction from the different ingredients taking place meaning that these ingredients react to water.

</span>

3 0

3 years ago

Which conversion factor do you use first to calculate the number of grams of CO2 produced by the reaction of 50.6 g of CH4 with

zlopas [31]

Answer:

This is the conversion factor, we have to use:

44 g / 1mol

Explanation:

The reaction for the methane combustion is:

CH₄ + 2O₂ → CO₂ + 2H₂O

First of all we use this conversion factor to determine the moles of methane, we used.

50.6 g . 1 mol / 16 g = 3.16 mol

So ratio is 1:1, then 3.16 mol of methane will produce 3.16 moles of CO₂

To calculate the grams of produced dioxide:

3.16 mol . 44 g / 1mol = 139.04 g

5 0

3 years ago