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3 years ago

Which angles are right

Chemistry

2 answers:

Ivahew [28]3 years ago

8 0

Answer:

a right is 90 degrees

Citrus2011 [14]3 years ago

5 0

Right angle acute angle obtuse angle

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You are provided with a compound fertilizer, 40-15-10.Calculate the quantity of fertilizer to add to a one hectare field supply

Verdich [7]

Answer:

a. 300 Kg of fertilizer

b. 225 Kg of fertilizer

c. 400 Kg of fertilizer

d. 600 Kg of fertilizer

Explanation:

The percentage composition ratio of Nitrogen, Phosphorus and Potassium in a 1 Kg bag of the given fertilizer is 40:15:10.

Therefore a 1 Kg bag contains;

40/100 * 1 Kg = 0.4 Kg of Nitrogen;

15/100 * 1 Kg = 0.15 Kg of phosphorus;

10/100 * 1 Kg = 0.1 Kg of potassium

Quantity of fertilizer required to add to a hectare to supply;

a. Nitrogen at 120 kg/ha = 120/0.4 = 300 Kg of fertilizer

b.. Nitrogen at 90 Kg/ha = 90/0.4 = 225 Kg of fertilizer

c. Phosphorus at a rate of 60 kg/ha = 60/0.15 = 400 Kg of fertilizer

d. Potassium at a rate of 60 kg/ha = 60/0.1 = 600 Kg of fertilizer

8 0

3 years ago

Consider the above unbalanced equation. What volume of CO2 is produced at 270. mm Hg and 38.5°C when 0.820 g of C4H8 reacts with

irinina [24]

Answer:

The volume of CO2 is 4.20 L

Explanation:

Step 1: Data given

Pressure = 270 mm Hg = 260 /760 = 0.355263 atm

Temperature : 38.5 °C = 311.65 K

Mass of C4H8 = 0.820 grams

Step 2: The balanced equation

C4H8 + 6O2 → 4CO2 + 4H2O

Step 3: Calculate moles C4H8

Moles C4H8 = mass C4H8 / molar mass C4H8

Moles C4H8 = 0.820 grams / 56.11 g/mol

Moles C4H8 = 0.0146 moles

Step 4: Caalculate moles CO2

For 1 mol C4H8 we need 6 moles O2 to produce 4 moles CO2 and 4 moles H2O

For 0.0146 moles we'll have 4*0.0146 = 0.0584 moles CO2

Step 6: Calculate Volume CO2

p*V = n*R*T

V = (n*R*T) /p

⇒ with V = the volume of CO2 = TO BE DETERMINED

⇒ with n = the moles of CO2 = 0.0584 moles

⇒ with R = the gas constant = 0.08206 L*atm / mol*K

⇒ with T = The temperature = 311.65 K

⇒ with p = the pressure = 0.355263 atm

V = (0.0584 * 0.08206 * 311.65) / 0.355263

V = 4.20 L

The volume of CO2 is 4.20 L

8 0

3 years ago

Pls help! its 20pts! brainliest, rattings, thanks, etc...

Misha Larkins [42]

Question 4: The first one

Question 5: The fourth one

Question 6: The first one

Question 7: The third one

5 0

3 years ago

Read 2 more answers

Add a temperature of -33.0 Celsius a sample of a confirmed gas eggs or to pressure of 0.5 to 6 ATM if it's volume remains consta

Levart [38]

Answer: The final temperature of the gas is -220.6°C

Explanation:

To calculate the final temperature of the system, we use the equation given by Gay-Lussac Law. This law states that pressure of the gas is directly proportional to the temperature of the gas at constant pressure.

Mathematically,

$\frac{P_1}{T_1}=\frac{P_2}{T_2}$

where,

$P_1\text{ and }T_1$ are the initial pressure and temperature of the gas.

$P_2\text{ and }T_2$ are the final pressure and temperature of the gas.

We are given:

$P_1=6atm\\T_1=-33^oC=[273-33]K=240K\\P_2=1.31atm\\T_2=?$

Putting values in above equation, we get:

$\frac{6atm}{240K}=\frac{1.31atm}{T_2}\\\\T_2=\frac{1.31\times 240}{6}=52.4K$

Converting the temperature from kelvins to degree Celsius, by using the conversion factor:

$T(K)=T(^oC)+273$

$52.4=T(^oC)+273\\\\T(^oC)=-220.6^oC$

Hence, the final temperature of the gas is -220.6°C

3 0

4 years ago

If a rock is thrown 0.8 meters into the air, How fast was it thrown

sergiy2304 [10]

V=0 m/s, u=?, a = 9.8 m/s² and s = 0.8 m
u²=2×9.8×0.8=15.68
u=3.959 ≈ 3.96 m/s

3 0

3 years ago

Read 2 more answers