Ask question

Ask question

All categories

2 years ago

14

What is a mineral used in making fertillizer 1. silver 2. silica 3. tin 4. gypsum

2 answers:

nikklg [1K]2 years ago

7 0

Answer:

Gypsum

Explanation:

Marat540 [252]2 years ago

5 0

The Answer Is Gypsum

Hope That Helps!

You might be interested in

What would the empirical formula be for the molecular compound CoH904?

Mashutka [201]

It would be the same thing if the Co does not have a number with it because it can’t reduce

5 0

1 year ago

In the laboratory you dissolve 15.9 g of barium chloride in a volumetric flask and add water to a total volume of 375 ml. what i

ASHA 777 [7]

<span>There are a number of ways to express concentration of a solution. This includes molarity. Molarity is expressed as the number of moles of solute per volume of the solution. So, we calculate as follows:

Molarity = 15.9 g BaCl2 ( 1 mol / 208.23 g ) / .375 L = 0.204 mol / L</span>

5 0

2 years ago

25 Points Please Help ASAP!! View Attached Image!! Will Mark Brainliest If All Are Answered!!

KIM [24]

Answer:

Answers in explanation.

Explanation:

30. A (A chemical changes changes the chemical properties)

31. C (rusting is an example of a chemical change

32. B (A reaction requires energy, so some energy will be expelled)

33. B (Color change is an example of a chemical change)

34. A (The law of the conservation of mass: Mass and Energy cannot be created nor destroyed)

8 0

2 years ago

What is the empirical formula for a compound that contains 10.89% magnesium 31.77% chloride and 57.34% oxygen

Blizzard [7]

Answer: $Mg_{1}Cl_{2}O_{8}$

Explanation:

If percentage are given then we are taking total mass is 100 grams.So, the mass of each element is equal to the percentage given.

Mass of Mg = 10.89 g

Mass of Cl = 31.77 g

Mass of O = 57.34 g

Step 1 : convert given masses into moles.

Moles of Mg= $\frac {\text{ given mass of Mg}}{\text{ molar mass of Mg}}= \frac {10.89g}{24g/mole}=0.45moles$

Moles of Cl = $\frac {\text{ given mass of Cl}}{\text{ molar mass of Cl}}= \frac {31.77g}{35.5g/mole}=0.89moles$

Moles of O = $\frac {\text{ given mass of O}}{\text{ molar mass of O}}=\frac {57.34g}{16g/mole}=3.58moles$

Step 2 : For the mole ratio, divide each value of moles by the smallest number of moles calculated.

For Mg = $\frac {0.45}{0.45}=1$

For Cl = $\frac {0.89}{0.45}=2$

For O= $\frac {3.58}{0.45}=8$

The ratio of Mg :Cl : O= 1 : 2 : 8

Hence the empirical formula is $Mg_{1}Cl_{2}O_{8}$

4 0

2 years ago

A sample of carbon of mass 250 mg from wood found in a tomb underwent 2480 carbon- 14 disintegrations in 20 h. Estimate the time

Ksenya-84 [330]

Explanation:

Let the age to be found in years is y.

Hence, $(2480 disintegrations) \times \frac{\frac{1.0g}{0.250g}}{1.84 \times 10^{4} disintegrations}$

= (\frac{1}{2})^{\frac{y}{5730yr}}

Solve for y as follows.

0.53913 = (\frac{1}{2})^{\frac{y}{5730yr}}

Now, taking log on both the sides as follows

log 0.53913 = $(\frac{z}{5730}) log \frac{1}{2}
$

$\frac{log 0.53913}{log (1/2)}$ = $\frac{z}{5730}$

z = $\frac{5730 \times log 0.53913}{log (1/2)}$

= 5107 years

Thus, we can conclude that the time since death is 5107 years.

5 0

2 years ago