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dangina [55]
4 years ago
15

A farmer wants to know if a new pesticide will produce better tomatoes than

Chemistry
1 answer:
iogann1982 [59]4 years ago
4 0

Answer:

D. Using the new pesticide produces bigger tomatoes than using the

old pesticide.

Explanation:

This hypothesis is best to test for the effect of the new pesticide on the tomato plant.

A pesticide is chemical formulation used to kill pests of farm crops.

Pests prevents the healthy and proper growth of plants thereby resulting in poor yield on the farm.

For the farmer to ascertain the effect of the pesticide on his farm crop, he must compare the yield of his produce. Some tomato might grow well but would not bear good fruit. If the farmer focuses on the fruit produced, he would have derieved a good hypothesis in his experiment.

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1) What is the mass of 6.2 mol of K2CO3?
lorasvet [3.4K]

Answer:

\boxed {\boxed {\sf 856.8648 \ grams \ of \ K_2CO_3}}

Explanation:

To convert from moles to grams, we must find the molar mass.

1. Molar Mass

First, identify the elements in the compound. K₂CO₃ It has potassium, carbon, and oxygen. Find these elements and their masses on the Periodic Table.

  • K: 39.098 g/mol
  • C: 12.011 g/mol
  • O: 15.999 g/mol

Note the subscript of 2 after K and 3 after O. We must multiply oxygen's molar mass by 2, then oxygen's by 3, and add carbon.

  • 2(39.098 g/mol) + 3(15.999 g/mol) + 12.011 g/mol= 138.204 g/mol

2. Convert Moles to Grams

Use the molar mass as a fraction.

\frac {138.204 \ g \ K_2CO_3}{1 \ mol \ K_23CO_3}

Multiply by the given number of moles: 6.2

6.2 \ mol \ K_2CO_3 *\frac {138.204 \ g \ K_2CO_3}{1 \ mol \ K_23CO_3}

6.2  *\frac {138.204 \ g \ K_2CO_3}{1 }

6.2  * {138.204 \ g \ K_2CO_3}

856.8648 \ g \ K_2CO_3

There are <u>856.8648 grams</u> of potassium carbonate in 6.2 moles.

4 0
3 years ago
Water with a salinity of 20 g/L has a density of<br> _kg/m<br> 3
Nataly [62]

Answer:

20 kg/m3

Explanation:

8 0
3 years ago
Why do polar and non polar molecules have different properties?
Margaret [11]
The greater the electronegativity difference, the more ionic the bond is. Bonds that are partly ionic are called polar covalent bonds. Nonpolar covalent bonds, with equal sharing of the bond electrons, arise when the electronegativities of the two atoms are equal.
8 0
4 years ago
2CO + O2  2CO2
murzikaleks [220]

Answer:

75 L Co2

37.5 L o2

Explanation:

welcome.

3 0
3 years ago
Plz help ASAP i will give brainlists
Law Incorporation [45]
The correct answer is C!
6 0
3 years ago
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