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3 years ago

Atoms of hydrogen can become helium atoms during a chemical reaction. True False

Chemistry

2 answers:

Cloud [144]3 years ago

5 0

Falsee

Can’t change into another.

marishachu [46]3 years ago

3 0

Answer:

false

in chemical reaction element doesnot change into another

Explanation:

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Conner is testing the pH of a swimming pool and he finds it to be 6.5. Optimal pH for swimming is between 7.0 and 7.6.

Lunna [17]

Answer:

The answer is B. I took the test and made a 100

Explanation:

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2 years ago

Polonium has a mass number of 212 and an atomic number of 84. In a balanced nuclear reaction, polonium releases an alpha particl

antoniya [11.8K]

Answer:

D. 82

Explanation:

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2 years ago

State 5 negative effects hurtful words can have on people

Doss [256]

1- can cause insecurities and make people less confident
2- Words can reflect on someone’s mood throughout the day
3- might cause depression or anxiety
4- listening to negative words constantly can make the person’s mind think it’s the truth
5- might change a person

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2 years ago

How many molecules units are in 4.5 moles of CF4

kobusy [5.1K]

1.0 mole ---------- 6.02x10²³ molecules
4.5 moles -------- ?

4.5 * 6,02x10²³ / 1.0

= 2.709x10²⁴ molecules units

7 0

2 years ago

Tetrachloromethane, CCl4 is produced from the substitution reaction between methane and chlorine gas. If the rate of formation o

Korolek [52]

The rate of disappearance of chlorine gas : 0.2 mol/dm³

<h3>Further explanation</h3>

The reaction rate (v) shows the change in the concentration of the substance (changes in addition to concentrations for reaction products or changes in concentration reduction for reactants) per unit time.

For reaction :

$\tt aA+bB\rightarrow cC+dD$

The rate reaction :

$\tt -\dfrac{1}{a}\dfrac{d[-A]}{dt}= -\dfrac{1}{b}\dfrac{d[-B]}{dt}=\dfrac{1}{c}\dfrac{d[C]}{dt}=\dfrac{1}{d}\dfrac{d[D]}{dt}$

Reaction for formation CCl₄ :

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From equation, rate of reaction = rate of formation CCl₄ = 0.05 mol/dm³

Rate of formation of CCl₄ = reaction rate x coefficient of CCCl₄

0.05 mol/dm³ = reaction rate x 1⇒reaction rate = 0.05 mol/dm³

The rate of disappearance of chlorine gas (Cl₂) :

Rate of disappearance of Cl₂ = reaction rate x coefficient of Cl₂

Rate of disappearance of Cl₂ = 0.05 x 4 = 0.2 mol/dm³

4 0

2 years ago