All categories

2 years ago

Please help ASAP!!!!!!!

Chemistry

1 answer:

SpyIntel [72]2 years ago

8 0

Answer:

Chemists develop safer and more effective fertilizers and pesticides .
Chemists develop more productive and safer crops .

Explanation:

Agriculture means food producing

You might be interested in

What is a positive ion?

BaLLatris [955]

Answer:

If the atom has more electrons than protons, it is a negative ion or ANION. If it has more protons than electrons, it is a positive ion.

Explanation:

Positive ions are typically metals or act like metals. Many common materials contain these ions. Mercury is found in thermometers, for instance, and aluminum is a metal that is found in a surprising amount of things.

8 0

3 years ago

In a sample of oxygen gas at room temperature, the

valina [46]

Answer: The Kinetic Molecular Theory of Matter

Explanation: The answer is: B. Collisions between gas particles are elastic; there is no net gain or loss of kinetic energy.

The Kinetic Molecular Theory of Matter

7 0

2 years ago

Is boron an element a compound a heterogeneous mixture or a homogeneous mixture?

liberstina [14]

The answer is heterogeneous mixture<span> because the </span>blood<span> cells are physically separate from the </span>blood<span> plasma.</span>

3 0

2 years ago

3 points

VLD [36.1K]

Answer:

<h3>The answer is 8.29 %</h3>

Explanation:

The percentage error of a certain measurement can be found by using the formula

$P(\%) = \frac{error}{actual \: \: number} \times 100\% \\$

From the question

actual density = 19.30g/L

error = 20.9 - 19.3 = 1.6

We have

$p(\%) = \frac{1.6}{19.3} \times 100 \\ = 8.290155440...$

We have the final answer as

Hope this helps you

5 0

3 years ago

What are the molarity and osmolarity of a 1-liter solution that contains half a mole of calcium chloride? How many molecules of

givi [52]

Answer:

Molarity = 0.5 M

Osmolarity = 0.5 x 2 = 1 Osmpl.

Molecules of Cl2 = 6.02 x $10^{23}$ / 4= 1.505 x $10^{23}$ no. of molecules

Explanation:

If we add half mole in 1L volume than molarity will obviously be 0.5 M.

The osmolarity is molarity multiplies by number of dissociates of solute that for CaCl2 are 2. So, 2 x 0.5 = 1

Half will be molecules of Ca and half will be of Cl2 for 0.5M.

6 0

3 years ago