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2 years ago

QUESTION 3 and 4 please

Chemistry

2 answers:

Katena32 [7]2 years ago

8 0

Answer:

The answer to question 3 should be C. Summarizing the results.
The answer to question 4 should be D. Comparing data from the experiment to the prediction of the hypothesis.

Explanation:

Rashid [163]2 years ago

5 0

Answer: For question 3 Your answer will be C

For question 4 your answer will be D

Explanation:

this is because this part of a scientific hypothesis and cycle.

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Why does one mole of carbon atoms have a smaller mass than one mole of sulfur atoms?

Ratling [72]

To determine this, you can look at the molecular weight of that particular atom which is found on the periodic table. Carbon has a molar mass of 12.01 grams / mole. Sulfur has a molar mass of 32.06 grams / mole. This means one mole of carbon weighs 12.01 grams and one mole of sulfur weighs 32.06 grams. Therefore, one mole of carbon atoms has a smaller mss than one mole of sulfur atoms.

6 0

3 years ago

Read 2 more answers

When a solid with a mass of 53.78 g is added to 50.0 ml of water in a graduated cylinder, the volume increases to 56.4 ml. Calcu

Bad White [126]

Answer:

<h3>The answer is 8.40 g/mL</h3>

Explanation:

The density of a substance can be found by using the formula

$density = \frac{mass}{volume} \\$

volume = final volume of water - initial volume of water

volume = 56.4 - 50 = 6.4 mL

We have

$density = \frac{53.78}{6.4} \\ = 8.403125$

We have the final answer as

Hope this helps you

3 0

3 years ago

The thermal decomposition of N2O5 obeys first-order kinetics. At 45°C, a plot of ln[N2O5] versus t gives a slope of −6.40 × 10−4

finlep [7]

Answer:

<u>1,080 min</u>

<u></u>

Explanation:

A <em>first order reaction</em> follows the law:

$rate=k[A]$ , where [A] is the concentraion of the reactant A.

Equivalently:

$\dfrac{d[A]}{dt}=-k[A]$

Integrating:

$\dfrac{d[A]}{[A]}=-kdt$

$\ln \dfrac{[A]}{[A_o]}=-kt$

Half-life means [A]/[A₀] = 1/2, t = t½:

t½ = ln (2) / k

That means that the half-life is constant.

The slope of the plot of ln [N₂O₅] is -k. Then k is equal to 6.40 × 10⁻⁴ min⁻¹.

Thus, you can calculate t½:

t½ = ln(2) / 6.40 × 10⁻⁴ min⁻¹

t½ = 1,083 min.

Rounding to 3 significant figures, that is 1,080 min.

5 0

3 years ago

How many protons, neutrons, and electrons does Al^3+ have?

Ludmilka [50]

Protons: 13
Electrons: 10
Neutrons: 14

5 0

3 years ago

குளோரோ பென்சீனை எவ்வாறு பீனால் ஆக மாற்றுவது<br>

Assoli18 [71]

Explanation:

dows method

பதில்: டோவின் முறை

சோடியம் பினாக்ஸைடு அயனியைப் பெற, எதிர்வினை குளோரோபென்சீன் 623K மற்றும் 300atm வெப்பநிலையில் அக்வஸ் சோடியம் ஹைட்ராக்சைடுடன் உயர்த்தப்படுகிறது. சோடியம் பினாக்ஸைடு அயன் அடுத்த கட்டத்தின் போது நீர்த்த எச்.சி.எல் உடன் இணைக்கப்படுகிறது, இது இறுதி தயாரிப்பை பினோலாக உருவாக்குகிறது

by jus dot com

6 0

3 years ago