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Aneli [31]
3 years ago
7

A chemical company makes two brands of antifreeze. the first brand is 70% pure antifreeze, and the second brand is 95% pure anti

freeze. in order to obtain 160 gallons of a mixture that contains 80% pure antifreeze, how many gallons of each brand of antifreeze must be used?
Chemistry
1 answer:
Irina18 [472]3 years ago
6 0

64 gallons of 95%
96 gallons of 70%

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How many ions are in the following compounds?<br> a. (NH4)3PO4 =<br> b. NaCl =
Sliva [168]

Answer:

A- In (NH4)3PO4  there are four ions in total as three ions of NH₄ and is one ion of PO₄

5 0
3 years ago
A waste treatment pond is 50 m long and 25 m wide, and has an average depth of 2 m. The density of the waste is 75.3lbm/ft^3 .Ca
umka21 [38]

Answer:

W = 6.65 \cdot 10^{6} lbf

Explanation:

To find the weight (W) of the pond contents first we need to use the following equation:

W = m\cdot g   (1)

Where m the mass and g is the gravity  

Also, we have that the mass is:

m = \rho*V  (2)    

Where ρ is the density and V the volume

We cand calculate the volume as follows:

V = L*w*d   (3)

Where L is the length, w is the wide and d is the depth  

By entering equation (2) and (3) into (1) we have:

W = \rho*L*w*d*g

W = 75.3 lbm/ft^{3}*50 m*25 m*2 m*9.81 m/s^{2}  

W = 75.3 lbm/ft^{3}*\frac{(1 ft)^{3}}{(0.3048 m)^{3}}*\frac{0.454 kg}{1 lbm}*50 m*25 m*2 m*9.81 m/s^{2} = 2.96 \cdot 10^{7} N}*\frac{0.2248 lbf}{1 N} = 6.65\cdot 10^{6} lbf              

Therefore, the weight of the pond is 6.65x10⁶ lbf.

I hope it helps you!

6 0
4 years ago
A 25.0 ml sample of gas has a pressure of 760 torr. What is the volume of the gas if the pressure decreases to 380 torr ? Assume
anygoal [31]

Answer:

50mL

Explanation:

Using Boyle's law equation as follows:

P1V1 = P2V2

Where;

P1 = initial pressure (torr.)

P2 = final pressure (torr.)

V1 = initial volume (mL)

V2 = final volume (mL)

According to the information provided in the question,

V1 = 25.0mL

V2 = ?

P1 = 760 torr.

P2 = 380 torr.

Using P1V1 = P2V2

V2 = P1V1//P2

V2 = (760 × 25) ÷ 380

V2 = 19000 ÷ 380

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4 0
3 years ago
For the following reaction, 13.1 grams of glucose (C6H12O6) are allowed to react with 10.6 grams of oxygen gas. glucose (C6H12O6
mart [117]

Answer:

There will be formed 14.58 grams of CO2

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There will remain 3.151 grams of glucose

Explanation:

Step 1: Data given

Mass of glucose = 13.1 grams

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Mass of oxygen = 10.6grams

molar mass of oxygen = 32 g/mol

<u>Step 2</u>: The balanced equation

C6H12O6 + 6 O2 → 6H2O + 6CO2

<u>Step 3</u>: Calculate moles of glucose

Moles of glucose = mass glucose / molar mass glucose

Moles of glucose = 13.1 grams / 180.156 g/mol

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Step 4: Calculate moles of oxygen

Moles O2 = 10.6 grams / 32 g/mol

Moles O2 = 0.33125 moles

Step 5: Calculate the limiting reactant

For 1 mol of glucose , we need 6 moles of O2 to produce 6 moles of H2O and 6 moles of CO2

Oxygen is the limiting reactant. It will completely be consumed ( 0.33125 moles).

Glucose is in excess. There will be consumed 0.33125/6 = 0.05521 moles

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Step 6: Calculate moles of CO2

For 1 mol of glucose , we need 6 moles of O2 to produce 6 moles of H2O and 6 moles of CO2

For 0.33125 moles of O2 we'll get 0.33125 moles of CO2 produced

Step 7: Calculate mass of CO2

Mass of CO2 = moles CO2 * molar mass CO2

Mass CO2 = 0.33125 moles * 44.01 g/mol

Mass CO2 = 14.58 grams

7 0
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What did the copernican revolution demonstrate
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Answer:

The Copernican revolution demonstrated that science was a process of changing ideas.

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