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3 years ago

Which statement describes an atomic nucleus?

Chemistry

2 answers:

lisabon 2012 [21]3 years ago

5 0

Answer: on edg it is d

Explanation:

likoan [24]3 years ago

4 0

The nucleus consists of the protons and neutrons. It contains the most mass in the atom.

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Is the salt solution in the Dead<br>Sea dilute, concentrated or<br>saturated? Explain.

dexar [7]

The waters of the Dead Sea are extremely saline, and, generally, the concentration of salt increases toward the lake's bottom. ... The deep water was saturated with sodium chloride , which precipitated to the bottom.

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3 years ago

The moon rises and sets every day, like the sun. Sarah noticed that the moon was sometimes visible at night and sometimes during

eimsori [14]

the answer is A.) the moon is orbiting the earth once per month

its the only logical answer, the others are either impossible or illogical

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3 years ago

What is the charge of the nickel ion in Ni(CIO3)3 if chlorate, ClO3-, has a charge of<br> 1- ?*

o-na [289]

Answer:

i am new but I haven't reached this level yet

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3 years ago

How many molecules are in 0.55 moles of Cu(NO3)2?

xeze [42]

<h3>Answer:</h3>

3.3 × 10²³ molecules Cu(NO₃)₂

<h3>General Formulas and Concepts:</h3>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.

<u>Stoichiometry</u>

Using Dimensional Analysis

<h3>Explanation:</h3>

<u>Step 1: Define</u>

0.55 mol Cu(NO₃)₂

<u>Step 2: Identify Conversions</u>

Avogadro's Number

<u>Step 3: Convert</u>

[DA] Set up: $\displaystyle 0.55 \ mol \ Cu(NO_3)_2(\frac{6.022 \cdot 10^{23} \ molecules \ Cu(NO_3)_2}{1 \ mol \ Cu(NO_3)_2})$
[DA] Multiply/Divide [Cancel out units]: $\displaystyle 3.3121 \cdot 10^{23} \ molecules \ Cu(NO_3)_2$

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 2 sig figs.</em>

3.3121 × 10²³ molecules Cu(NO₃)₂ ≈ 3.3 × 10²³ molecules Cu(NO₃)₂

4 0

3 years ago

How many grams of lead (ll) chloride are produced from the reaction of 25g of sodium chloride according to the balanced reaction

Natalka [10]

Answer:

The answer to your question is: 25 g of PbCl2

Explanation:

Data

NaCl = 25 g

PbCl₂ = ?

Pb(NO3)2 + 2 NaCl ⇒ PbCl2 + NaNO3

MW NaCl = 58.5 g

MW PbCl2 = 277 g

2(58.5 g) of NaCl ------------------------ 277 g of PbCl2

25 g of NaCl ------------------------ x

x = (25 x 277) / 117

x = 25 g

7 0

4 years ago