Fill in the blanks and name the process.

What effect does the pH of water have on radish seed germination?

natka813 [3]

It has a high percentage of germination in pH’s 13-14 this shows that radish seeds can germinate very well in almost all pH levels

8 0

3 years ago

What is the bond polarity of So2?

Bumek [7]

Answer:

covalent bonding

Type of Bonding: Sulfur Dioxide is a process of covalent bonding, since Sulfur and Oxygen are both non-metals. The Sulfur is in the center surrounded by 2 Oxygen atoms.

4 0

4 years ago

How much heat do you need to raise the temperature of 150 g of ice from -30°C to -15°c?

OLga [1]

To solve this question, you must use the formula: q=mc(change in temperature), where q is heat, m is mass, C is specific heat and temperature change is temperature change. The specific heat for ice is 2.1kJ/Kg x K (given). The change in temperature is 15 degrees Celsius (which you should change to kelvins so you can cancel out units), or 273 + 15 = 288K. The mass is 150 grams, which is 0.15 kg. Now, we can solve for q, heat. We will do this by substituting variables into the formula. After simplifying and cancelling out units, the answer we get is: 90.72kJ.

4 0

3 years ago

Consider the dissolution of 1.50 grams of salt XY in 75.0 mL of water within a calorimeter. The temperature of the water decreas

-BARSIC- [3]

Answer:

The quantity of heat lost by the surroundings is 258,5J

Explanation:

The dissolution of salt XY is endothermic because the water temperature decreased.

The total heat consumed by the dissolution process is:

4,184 J/g°C × (75,0 + 1,50 g) × 0,93°C = 297,7 J

This heat is consumed by the calorimeter and by the surroundings.

The heat consumed by the calorimeter is:

42,2 J/°C × (0,93°C) = 39,2 J

That means that the quantity of heat lost by the surroundings is:

297,7J - 39,2J = <em>258,5 J</em>

I hope it helps!

8 0

3 years ago

For each of the following unbalanced equations, calculate how many grams of each product would be produced by complete reaction

LUCKY_DIMON [66]

Answer:

The answer to your question is

Explanation:

Data

12.5 g of reactant

Balanced Reaction 1

TiBr₄ + 2H₂ ⇒ Ti + 4HBr

Molar mass of TiBr₄ = 48 + (4 x 80) = 368 g

Atomic mass of Ti = 48 g

Molar mass of HBr = 1 + 80 = 81

368 g of TiBr₄ ---------------- 48 g of Ti

12.5 g of TiBr₄ -------------- x

x = (12.5 x 48) / 368

x = 1.63 g of Ti

368 g of TiBr₄ ----------------4(81) g of HBr

12.5 g of TiBr₄ ------------- x

x = (12.5 x 324) / 368

x = 11 g of HBr

Balanced reaction 2

3SiH₄ + 4NH₃ ⇒ Si₃N₄ + 12H₂

Molar mass of SiH₄ = 28 + 4 = 32

Molar mass of Si₃N₄ = 28 x 3 + 14 x 4 = 84 + 56 = 140 g

Atomic mass of H₂ = 2 g

3(32) g of SiH₄ --------------- 140 g of Si₃N₄

12.5 g of SiH₄ -------------- x

x = 18.2 g of Si₃N₄

3(32) g of SiH₄ --------------- 24 g of H₂

12.5 g of SiH₄ -------------- x

x = 3.125 g of H₂

5 0

4 years ago