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3 years ago

Use the following terms in the same sentence chemical reaction and precipitate

Chemistry

1 answer:

Kitty [74]3 years ago

6 0

Answer: Precipitate is a sign that a chemical reaction has occurred.

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What is the mass for 3.01*10 23 molecules h2o

Genrish500 [490]

M H₂O: 1g×2 + 16g = 18g


6,02×10²³ --------- 18g
3,01×10²³ --------- Xg
X = (18×3,01×10²³)/6,02×10²³
X = 9g

:)

7 0

4 years ago

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One way to measure temperature in some applications is to monitor the gas pressure in a rigid, closed container. What is the tem

julia-pushkina [17]

Answer:

296.43 K is the temperature of a vessel when pressure reads 1.250 atm.

Explanation:

At STP, when pressure is 1.000 atm the value of temperature is 273,15 K.

If the pressure at temperature T reads as 1.250 atm.

$P_1=1.000 atm, T_1=298.15K$

$P_2=1.250 atm,T_2=?$

Applying Gay Lussac's law:

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$ (At constant volume)

$\frac{1.000 atm}{273.15 K}=\frac{1.250 atm}{T_2}$

$T_2=296.43 K$

296.43 K is the temperature of a vessel when pressure reads 1.250 atm.

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3 years ago

Air enters a diffuser witha velocity of 400 m/s, a pressure of 1 bar and temperature of 25 C. It exits with a temperature of 100

ANEK [815]

Answer:

Exit velocity of air is 96.43 m/s.

Explanation:

Given that

$V_1=400\ m/s$

$T_1=25C$

$T_2=100C$

For air

$C_p=1.005\ KJ/kg.K$

Now from first law of thermodynamics for open system at steady state

$h_1+\dfrac{V_1^2}{2000}+Q=h_2+\dfrac{V_2^2}{2000}+w$

For diffuser

$h_1+\dfrac{V_1^2}{2000}=h_2+\dfrac{V_2^2}{2000}$

We know that

$h=C_pT$

$h_1+\dfrac{V_1^2}{2}=h_2+\dfrac{V_2^2}{2000}$

$1.005\times 25+\dfrac{400^2}{2000}=1.005\times 100+\dfrac{V_2^2}{2}$

$V_2=96.43\ m/s$

So the exit velocity of air is 96.43 m/s.

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4 years ago

What light has the highest frequency

ahrayia [7]

The color violet has the highest frequency

6 0

4 years ago

Power plants release sulfur dioxide and nitrogen oxides into the atmosphere where they combine with water vapor to form _____.

Ad libitum [116K]

Answer:

The correct option is acid precipitation

Explanation:

When sulfur dioxide react with water vapors, they form sulphuric acid.
Similarly, when NOx reacts with water vapors to form HNO2 and HNO3.
So these acid cause the rain water into acidic rain.

4 0

4 years ago

Read 2 more answers