#### What is the mass of 1 mole of barium sulfate (BaSO4) use to take X rays of the gastrointestinal tract?

What is the mass of 1 mole of barium sulfate (BaSO4) use to take X rays of the gastrointestinal tract? a. 64 g b. 185.33 g c. 233.33 g d. 169.33 g

1d

#### The Force Exerted on the Moon (Figure 1)shows the Earth, Moon, and Sun (not to scale) in their relative positions at the time when the Moon is in its third-quarter phase.

Though few people realize it, the force exerted on the Moon by the Sun is actually greater than the force exerted on the Moon by the Earth. In fact, the force exerted on the Moon by the Sun has a... more

2d

#### Calculus question

Since January 1, 1960, the population of Slim Chance has been described by the formula P=42000(0.97)^t, where P is the population of the city t years after the start of 1960. At what rate was the... more

#### Suppose that the distribution of weekly water usage for single-family homes in a particular city is approximately normal. The mean is 1400 gallons, and the standard deviation is 300 gallons.

a. What is the z-score for 800 gallons? b. What is the approximate value of the highest 15th percentile? c. What is the 7-score for 1665 gallons? d. What is the approximate value of the 14th... more

#### Chemistry question

The density of air under ordinary conditions at 25 “C is 1.255 kg/m3. How many grams of air are in a room that measures 10 ft x9ft and has and 12.0 ft celine?

3d

#### lawn bowling momentum

You throw a 2.6 kg lawn bowling ball forward (that is in the positive direction) at 14.7 m/s and it hits a 1.1 kg "pin" that is at rest. If the pin flies forward at 29.6 m/s, what is the ball's new... more

#### Compound interest

A particular savings account has a 7% interest rate.1) If you invest \$1200 into the account and it compounds monthly, what will the balance be after 5 years?2) How much money would you need to... more

#### Determine the limiting reagent and the theoretical yield of urea [(NH2) 2CO]

Suppose that 4.75 g of NH3 are mixed with 7.50 g of CO2. Determine the limiting reagent and the theoretical yield of urea [(NH2) 2CO]. b) How many grams are needed to prepare 25.00 mL of a 5% m /... more

6d

#### A child’s toy consists of three cars that are pulled in tandem on small frictionless rollers. The cars have masses m1=3.1 kg, m2 =2.4 kg, and m3 =1.2 kg....

A child’s toy consists of three cars that are pulled in tandem on small frictionless rollers. The cars have masses m1=3.1 kg, m2 =2.4 kg, and m3 =1.2 kg. If they are pulled to the right with a... more

#### What is a good way to resolve this?

The random variable X has a probability density function fX (x) = 1/3 δ(x)+ 2/3 δ(x−2). Another random variable, Y , has a probability density function fY (y) = 1/2 δ(y) + 1/2 δ(y − 3). X and Y... more

7d

#### Free Fall Question

If a drop of rain falls from a height of 2400 meters and hits the ground in 192 seconds, was it in free fall?

12d

13d

#### Hi can you show me a step by step guide on how to solve this problem ?

Perhaps break it down that would be so helpful

#### my tutor gave me I dont understand how answer this

Air is about 78.0% nitrogen molecules and 21.0% oxygen molecules. Several other gases make up the remaining 1% of air molecules.What is the partial pressure of nitrogen in air at atmospheric... more

16d

#### Estimating Velocity (Derivatives)

I've been trying to work through this. I figured out the first half of this problem, but do not know how to estimate what the velocity at 0.2 would be.Consider a car whose position, s, is given by... more

16d

#### NAMING SIMPLE INORGANIC AND ORGANIC COMPOUNDS

1. Based on the formula for the sulfate ion (SO42–), predict the formula for(a) the selenate ion(b) the selenite ion. (Sulfur and selenium are both in group 6A and form analogous oxyanions.)

16d

#### Will the following reaction essentially go to completion?

The following reaction will essentially go to completion:HCl + H2O → Cl- + H3O+True or False?

17d

State the coordinates of the intercepts, stationary points, and the inflection point of p(x) = x (x^2-1)^2?a. Number of x-intercepts give the x,y coordinates:b. y-intercept: (?,?)c. number of... more

17d

#### Box on rotating disc

A bar is fastened to a rotating disc and is pushing a small box along the edge of the disc. When the box reaches the edge of the disc, it slides off. How can we determine the box's pathway as is... more

Exactly 3.3 s after a projectile is fired into the air from the ground, it is observed to have a velocity v⃗ = (8.9 i^ + 4.7 j^)m/s, where the x axis is horizontal and the y axis is positive... more

18d

#### Statistics question

63% of students entering four-year colleges receive a degree within six years. Is this percent higher for students who play intramural sports? H0:          Ha:

18d

#### Using the cylindrical shell method

Use the cylindrical shell method to find the exact volume of the solid generated by revolving the region by the curve y=Square root x2+1 (the whole equation x2 +1 is squared), x=square root 3, x=0,... more

21d

#### Chemistry 2110 Hw

In Bohr's model of the hydrogen atom, which is no longer the standard for understanding the atom, the electron revolves around the nucleus in one of an array of available orbits. Each orbit is... more

#### tangent line equations

The line y = b + mx is tangent to the graph of f at x = 7. Given that f( 7) = 5, the derivative f'( 7) = 4, and f"( 7) = 4, find m and b.

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