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olganol [36]
3 years ago
12

Please help me to solve this question​

Chemistry
1 answer:
Amanda [17]3 years ago
3 0

Answer:

+,+

÷,×

Explanation:

-6+(-4)=-2×(-6+11)

-10=-2×5

-10=-10

5-(-15)÷3=-5×-2

5-(-15÷3)=-5×-2

5-(-5)=10

5+5=10

10=10

- and - gives a +

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Kimchi is traditional Korean food made by fermenting cabbage or other vegetables in a mixture of spices and salt. Kimchi origina
Yuki888 [10]

Answer:

C. Water passes into the salt solution, dehydrating bacterial cells and making them harmless.

Explanation:

The salt solution is hypertonic to the bacterial cells and as such, water molecules will move from the bacterial cells into the salt solution, dehydrating the cells and rendering them harmless.

Option A is also true but it is irrelevant to the question asked. Option B and D are wrong.

The correct option is C.

3 0
3 years ago
What is the Tychonic System?
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5 0
4 years ago
The reaction of 15 moles carbon with 30 moles O2 will
chubhunter [2.5K]

Answer:

15 moles.

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

C+O_2\rightarrow CO_2

Clearly, since carbon and oxygen are in a 1:1 molar ratio, 15 moles of carbon will completely react with 15 moles of oxygen, therefore 15 moles of oxygen remain as leftovers. In such a way, since carbon and carbon dioxide are also in a 1:1 molar ratio, the theoretical yield of carbon dioxide is 15 moles based on the stoichiometry:

n_{CO_2}=15molC*\frac{1molCO_2}{1molC} \\\\n_{CO_2}=15molCO_2

Best regards.

8 0
3 years ago
How many moles are there in 8.50 X 1024 molecules of sodium sulfate, Na2SO3?
DiKsa [7]
Hello!

To solve this question, we need to use the Avogadro's Number, which is a constant first discovered by Amadeo Avogadro, an Italian scientist. He discovered that in a mole of a substance, there are 6,02*10²³ molecules. Using this relationship, we apply the following conversion factor:

8,50* 10^{24}molecules* \frac{1 mol Na_2SO_3}{6,02* 10^{23}molecules}=14,12 molesNa_2SO_3

So, 8,50 * 10²⁴ molecules of Na₂SO₃ represent 14,12 moles of Na₂SO₃ 

Have a nice day!
7 0
3 years ago
Sample of ethane (C2H6) was combusted completely and the water that formed has a mass of 1.61 grams. How much ethane, in grams,
Marina86 [1]

Answer:

Balanced Eqn

2C2H6 + 7O2 = 4CO2 + 6H2O

From the balanced equation

2((2*12)+(1*6)) of Ethane gave 6((1*2)+16)) of water

60g of Ethane. >. 108g. Of water

Xg > 1.61

X= 1.61*60/108

X= 0.89g

8 0
3 years ago
Read 2 more answers
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