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mars1129 [50]
3 years ago
13

How many moles are in 3.612x10^24 atoms of phosphorus?

Chemistry
1 answer:
Nataly_w [17]3 years ago
5 0

Answer: i don't know maybe 10.734x20^45

Explanation: i don't know this question. i don't get this right

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1. What would happen to the current model of the atom if new information about its structure is discovered in the future?
Semenov [28]
1-Option A. Current model will be revised. 
2-Option D. Nucleus
3-<span>Option B. </span>Counting the no. of protons.
6 0
3 years ago
Two 0.75 Amp loads are connected in parallel with a 2500 Milliamperehour Ni-Cd battery. Approximately how long can the battery p
nikdorinn [45]

Explanation:

It is given that two loads have 0.75 Ampere current each. And, they contain 2500 milli ampere per hour Ni-Cd battery.

As both the loads are connected in parallel. Hence, total current will be calculated as follows.

               I = I_{1} + I_{2}

                 = 0.75 A + 0.75 A

                 = 1.5 A

                 = 1.5 A \times \frac{1000 mA}{1 A}

                 = 1500 mA

Relation between time and capacity of battery is as follows.

             Capacity = Current × time (in hour)

therefore,        time = \frac{Capacity}{Current}

                                = \frac{2500 mA. h}{1500 A}

                                = 1.667 hr

Thus, we can conclude that the battery provide power to the load up to 1.667 hours.

4 0
4 years ago
Give the oxidation number of the element indicated for each compound.
NARA [144]

Answer:

a. C: +3 ; b. N: +5 ; c. S:+6 ; d. C: +4; e. Mn: +7 ; f. Cr: +6.

Explanation:

Global charges in molecules is 0

You sum all the oxidation states to determine the oxidation state for the compound.

Na₂C₂O₄ → Sodium oxalate → Global charge: 0

Oxidation state for C: +3

HNO₃ → Nitric acid → Global charge: 0

Oxidation state for N: +5

H₂SO₄ → Sulfuric acid → Global charge: 0

Oxidation state for S: +6

HCO₃⁻  →  Bicarbonate → Global charge: -1, this is an anion

Oxidation state for C: +4

KMnO₄ → Potassium permanganate → Global charge: 0

Oxidation state for Mn: +7

Cr₂O₇⁻ → Anion dichromate → Global charge: -2

Oxidation state for Cr: +6

8 0
3 years ago
How can you tell if a compound is an acid or base?
garri49 [273]
By there pH . a pH below 7 is acidic . Above 7 is basic. If it’s right at 7 it’s neutral.
6 0
3 years ago
Which of the following explains how movement of material within Earth causes volcanic eruptions?
BigorU [14]

Answer: c

Explanation: bc

7 0
3 years ago
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