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3 years ago

Which one is nonspecific defense of the body

Chemistry

1 answer:

lions [1.4K]3 years ago

8 0

A. Skin
Hope it helps!

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In the following reaction, eight moles of sodium hydroxide is broken down into four moles of sodium oxide and four moles of wate

maxonik [38]

Answer:

21.344%

Explanation:

For the given chemical reaction, 8 moles of the reactant should produce 4 moles of $Na_{2}O$ . However, 195 g of $Na_{2}O$ was produced instead. The molar mass of $Na_{2}O$ is 61.9789 g/mol.

Thus, the moles of $Na_{2}O$ produced = 195/61.9789 = 3.1462 moles

The percent error = [(Actual -Experiment)/Actual]*100%

The percent error = [(4.00 - 3.1462)/4.00]*100% = (0.85376/4.00)*100% = 21.344%

8 0

3 years ago

What is the theoretical yield of ammonia that can be obtained from the reaction of 10.0 g of H2 and excess N2?

zubka84 [21]

Theoretical yield is the ideal number, so we'll assume it all reacted without issue.
$\frac{10.0gH _{2} }{1}$ × $\frac{1molH_{2} }{2.016gH _{2} }$ × $\frac{2molNH _{3} }{3molH _{2} }$ × $\frac{17.03gNH _{3} }{1molNH _{3} }$ =56.3gNH↓3

8 0

3 years ago

Read 2 more answers

Two samples of matter differ in temperature by 20°C. What is the difference in temperature of these two samples using the Kelvin

anyanavicka [17]

Answer:

The difference is 293.15 Kelvin.

Explanation:

Given data:

Temperature difference of matter = 20°C

Temperature difference of matter in kelvin = ?

Solution;

Formula:

0°C +273.15

now we will put the values instead of 0.

20°C + 273.15 = 293.15 K

Thus, the temperature difference between two sample is 293.15 K.

5 0

3 years ago

(Please help ASAP I will mark brainliest!! (: )Which of the following describes what happens when a cell uses energy to transpor

mr Goodwill [35]

Answer: 4. Active Transport

3 0

3 years ago

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Acetanilide has a solubility of 1.00 g/185 ml in 25 oc water and 1.00 g/20 ml in 100 oc water. what is the minimum volume of wat

Likurg_2 [28]

In the crystallization process the solid compound is dissolved in the solvent at elevated temperature and the crystallize product obtained by slow cooling of the solution. Here the solubility of acetanilide at 100°C is 1g per 20mL of water. Thus to dissolve 500mg of acetanilide at high temperature that is 100°C we need 10mL of water.

Now at 25°C after the re-crystallization there will be some amount of dissolve acetanilide. Which can be calculated as- 185mL of water is needed to dissolve 1g or 1000mg of acetanilide at 25°C. Thus in 10mL of water there will be $\frac{10X1000}{185}=54.05$ gmg of acetanilide.

6 0

3 years ago