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Vera_Pavlovna [14]
1 year ago
5

Iday!' Read the following phrases from the article. 1. Full-scale war 2. Braces for a full invasion 3. Hostile act 4. Defenses o

n its eastern flank Why does the author use these words?
a. To call attention to Vladimir Putin's objective with the attack on Ukraine
b. To highlight the offensive steps taken by the Russian military
c to emphasize the heightened degree of military engagement
d. To document President Zelenskyy's aggressive approach to defending his country​
Chemistry
1 answer:
maria [59]1 year ago
7 0

Answer:

c.

Explanation:

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Explain the difference between mechanical weathering and chemical weathering​
Alchen [17]

Answer:

mechanical weathering breaks rocks into smaller forms without any change in their composition whereas chemical weathering breaks down rocks by forming new minerals .

or simply mechanical weathering is the physical breakdown of rocks while chemical weathering is the breakdown of rocks through chemical reactions .

5 0
3 years ago
Read 2 more answers
A polyatomic ion can be found in which of the following choices?
emmasim [6.3K]

Answer:

Indeed, most ionic compounds contain polyatomic ions. Well-known examples are sodium hydroxide (NaOH) with OH- as the polyatomic anion, calcium carbonate (CaCO3), and ammonium nitrate (NH4NO3), which contains two polyatomic ions: NH+ and NO3-.

Explanation:

hope it helps

3 0
2 years ago
Read 2 more answers
PLEASE HELP ASAP
Lapatulllka [165]

Answer:

See explanation

Explanation:

We must first write the equation of the reaction as follows;

C3H8 + 5O2 ----> 3CO2 + 4H2O

Now;

We obtain the number of moles of C3H8 = 132.33g/44g/mol = 3 moles

So;

1 mole of C3H8 yields 3 moles of CO2

3 moles of C3H8 yields 3 × 3/1 = 9 moles of CO2

We obtain the number of moles of oxygen = 384.00 g/32 g/mol = 12 moles

So;

5 moles of oxygen yields 3 moles of CO2

12 moles of oxygen yields 12 × 3/5 = 7.2 moles of CO2

We can now decide on the limiting reactant to be C3H8

Therefore;

Mass of CO2 produced = 9 moles of CO2 × 44 g/mol = 396 g of CO2

Again;

1 moles of C3H8 yields 4 moles of water

3 moles of C3H8 yields 3 × 4/1 = 12 moles of water

Hence;

Mass of water = 12 moles of water × 18 g/mol = 216 g of water

In order to obtain the percentage yield from the reaction, we have;

b) Actual yield = 269.34 g

Theoretical yield = 396 g

Therefore;

% yield = actual yield/theoretical yield × 100/1

Substituting values

% yield = 269.34 g /396 g × 100

% yield = 68%

8 0
3 years ago
Dichlorine monoxide is polar or nonpolar ?
skelet666 [1.2K]

Answer:

( dichlorine monoxide ) is Polar Explanation:Answer. Answer = CF2Cl2 (Dichlorodifluoromethane) is Polar What is polar and non-polar? Cl2O ( dichlorine monoxide ) is Polar I'll tell you the polar or nonpolar list below.

4 0
3 years ago
Can you please help me?
Luda [366]
I am not entirely certain, but endothermic is a reaction in which more is kept than released, so likely not D. Sorry I couldn't be of more help, but you could probably just google endothermic reactions and get some of the information necessary. Good luck.
8 0
3 years ago
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