Thomas-Build-It-up

Im not sure where to start with this, any help would be great!

If I am precipitating magnesium ammonium phosphate in the gravimetric analysis of phosphate, and phosphorus in a 2-g sample is about 10 percent, how many milliliters of ammonia solution must be added to give exactly enough precipitate? The ammonia solution has a concentration of 2 M. and the atomic mass of phosphorus is 30.97 g/mol.

I think I have the right answer, but Im not sure. If i have a sand salt mixture and i perform gravimetric analysis, filter it, allow the solids to dry, and the mass of the solids are 3.0 g and the mass of the original mixture was 15.0 g, whatis the percentage of sand? The percentage of salt?

I got 0.20 for sand and 0 for salt, is this right?

A gene has two alleles b and c. In the gene pool, the b allele accounts for 70 percent of the alleles at this locus. If the population is in Hardy-Weinberg equilibrium, what percentage of the population is heterozygotes with respect to this locus?

What is f'(-5) of y=(-4x^2-2x)(-x^2-9)

Jan: 9.5

Feb: 10.5

Mar: 12

Apr: 13.25

May: 14.5

Jun: 15

Jul: 14.75

Aug: 13.75

Sep: 12.5

Oct: 11.0

Nov: 9.75

Dec: 9.25

Given this, what is the expected number of daylight hours in march 2020

1. It has an amplitude of 1/4

2. It is a vertical shift of the parent function one unit up

3. It is a reflection of the parent function across the x-axis

4. It is a horizontal shift of the parent function pi/3 units left

5. A vertical stretch of the parent function by 4

6. A horizontal compression of the parent function by 1/3

How do you calculate (S subscript 37) for the arithmetic sequence in which (a subscript 7) = 25 and the common difference is d=(-1.7)

An equation that models saturns elliptical orbit around the sun is (x + 0.0831)^2/2.0449 + y^2/2.0380 = 1 in billions of miles. If the sun is located at one focus and its coordinates are (0,0), find saturns farthest distance from the sun in billions of miles?

How would I find the shortest distance between two points, E and D, if the line has to bounce off of an axis after starting at E before it gets to D. How do I prove that this is the shortest distance?

The heights of the children at a summer camp are normally distributed with a mean of 58 in. and a standard deviation of 4 in.

There are 150 children at the summer camp.

About how many children are expected to have heights between 54 in. and 62 in.?

a.51

b.71

c.102

d.143

A pet store has two birds. One has white feathers. And one has blue feathers. The white bird has two recessive alleles for feather color (bb). the blue bird has one dominant allele (B) and one recessive allele (b) for feather color. What will most likely be the phenotypes and genotypes of the offspring in a cross between the two birds.

A pet store has two birds. One has white feathers. And one has blue feathers. The white bird has two recessive alleles for feather color (bb). the blue bird has one dominant allele (B) and one recessive allele (b) for feather color. What will most likely be the phenotypes and genotypes of the offspring in a cross between the two birds.

Set up an equation to solve the triangle in the attachment. measure of angle 2 = 4x + 4 and measure of angle 1 = 5x - 2. Find x. A. 2 = 4x + 4

B. 4x + 4 = 5x - 2

C. 4x + 4 + 5x -2 = 180

D. 5x - 2 = 2