07/19/20

patient with respiratory alkalosis has a blood plasma pH of 7.60. What is the [H3O+] of the blood plasma?

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07/15/20

5. NEED HELP FAST!!!

The reactionC4H8(g)⟶2C2H4(g)has an activation energy of  262 kJ/mol.  At  600.0 K,  the rate constant,  𝑘,  is  6.1×10−8 s−1.  What is the value of the rate constant at  790.0 K?
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06/25/20

A certain volume of a gas had a pressure of 800 torr at a temperature of -40 degrees C. What was the original volume if the volume at STP is now 450.0 cm^3?
the correct answer is 365 cm^3. I just need an explanation. Thank you!
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06/23/20

can someone help me with this please
You are playing baseball with a friend and accidently hit the ball over your neighbor’s house and into their backyard. The following questions are about the ball’s movement from when... more
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06/22/20

the equation d=65h describes the distance (d) a vehicle travels in (h) hours. based on this formula, how long will it take a car to travel 90 miles
the equation d=65h describes the distance (d) a vehicle travels in (h) hours. based on this formula, how long will it take a car to travel 90 miles
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06/22/20

Given f(x) = 2x2 − 3 and g(x) = x + 8, identify g(f(4)).
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06/20/20

Write a chemical equation that communicates what solid CaCl2 (subscript 2) forms when dissolved in water. Note that water is not a reactant here.
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06/20/20

Find the probability of drawing a jack and then a 6 (with replacement) from a standard deck of cards
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06/18/20

Distance from here to there
The maximum distance D in kilometres that a person can see from a height h in kilometres above the ground is given by D=112√h. Find the height that would allow a person to see a distance of 84... more
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06/16/20

Determinant questions
What three results does a determinant give us regarding the roots of an equation? In this case, what would the determinant have to be in order to get each result? Where does the determinant come... more
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06/12/20

Please choose the write answer
A chemist mixes a 0.20 mol/l solution of a weak base where Kb=3.82*10^-10. The PH OF THIS solution isa) between 5 and 7b)between 9 and 12c) between 7 and 9d) between 12 and 14
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06/12/20

A 20.0 mL solution of NaOH is neutralized with 32.5 mL of 0.200 M HBr. What is the concentration of the original NaOH solution?
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06/09/20

Solubility Product
A student measures the CrO42- concentration in a saturated aqueous solution of silver chromate to be 1.28×10-4 M.Based on her data, the solubility product constant for silver chromate is...
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06/09/20

The reaction C4H8(g)⟶2C2H4(g) has an activation energy of 262 kJ/mol. At 600.0 K, the rate constant, 𝑘, is 6.1×10−8 s−1. What is the value of the rate constant at 870.0 K?
Please help me with this question!
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06/09/20

How do I solve this problem?
The sin A = 0.5. Find the angle A = ?. Using this relationship of sine and cosine being complements, what is the angle that would have the same cosine value as the sine of A?
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06/09/20

Is there an example of a function f(x) such that f’’(x) = –f(x)?
And why would this example be sufficient?
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06/09/20

Algebra 2, please help

If cos squared a = 3/8 what’s an expression for sin a?
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06/09/20

I Need Helpppppppppppppppppppp urgent I HAVE A QUIZ TOMORROW

Find the quotient of 6x^3-24x^2-9x/3x three different ways:By FactoringBy using Long Division By using the Distributive Property
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06/09/20

A baseball team plays in a stadium that holds 50000 spectators. With the ticket price at $12 the average attendence has been 22000.

A baseball team plays in a stadium that holds 50000 spectators. With the ticket price at $12 the average attendence has been 22000. When the price dropped to $11, the average attendence rose to... more
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06/08/20

Help with this math problem. I appreciate it !
Negociar invest a total of 31,500 in two accounted The first account earned a rate of return of 11% (after a year). However, the second account suffered a 9% loss in the same time period. At the... more
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06/08/20

A ball was kicked from the ground into the air with an initial upward velocity of 32 feet per second. Write an equation to model the height of the ball and find the maximum height that it reached.
answer the whole question
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06/05/20

what is the initial temperature of the mercury?
A sample of liquid mercury is heated with an electrical coil. If 32.3 Joules of energy are added to a 12.5 gram sample and the final temperature is 38.8°C, what is the initial temperature of... more
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06/04/20

Conservation of Energy Question
A 2.25 kg ball is thrown upward from ground level with an initial velocity of 12.0 m/s. What is the maximum height reached by the ball? Remember to state your givens for initial and final.
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06/01/20

Help With Basic Chem
How many grams of benzene,C6H6, can be melted with 49.8 kJ of heat energy? The molar heat of fusion of benzene is 9.95 kJ/mol.
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06/01/20

What volume (mL) of 1.50 × 10-2 M hydrochloric acid can be neutralized with 115 mL of 0.244 M sodium hydroxide?

1.     What volume (mL) of 1.50 × 10-2 M hydrochloric acid can be neutralized with 115 mL of 0.244 M sodium hydroxide? Show your work, and include units throughout the solution
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