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Nadusha1986 [10]
3 years ago
13

This chemical reaction is unbalanced: ___Pb(NO₃)₂(aq) + ___Li₂SO₄(aq) → ____PbSO₄(s) + ____LiNO₃(aq) Which coefficient should ap

pear in front of LiNO₃ in the balanced equation?
1
2
3
4
Chemistry
1 answer:
kakasveta [241]3 years ago
4 0

Answer: 2

Explanation:

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An acid is any substance that
ehidna [41]

Answer:

C

Explanation: a is incorrect since the lower the ph = more acidic and b is incorrect because it produces hydronium ion and d I’m not sure what it is but I no that base recieve the protons

4 0
3 years ago
A burning candle demonstrates the following type of energy transformations.
Ronch [10]

Answer:

B

Explanation:

the candle is hot so the first energy form should be heat. u could now just eliminate the rest but for further notice. the heat melts the wax in the candle, which is a physical change but also the thread is burning out which is a chemical change then light follows

5 0
2 years ago
Which of the following is always true when a substance undergoes a physical change
MissTica
I believe it's letter C.
4 0
3 years ago
The combustion of ethyne, shown below unbalance, produces heat which can be used to weld metals:
Andreyy89

Answer:

3.69 g

Explanation:

Given that:

The mass m = 325 g

The change in temperature ΔT = ( 1540 - 165)° C

= 1375 ° C

Heat capacity c_p = 0.490 J/g°C

The amount of heat required:

q = mcΔT

q =  325 × 0.490 × 1375

q = 218968.75 J

q = 218.97 kJ

The equation for the reaction is expressed as:

C_2H_{2(g)} + 5O_{2(g)} \to 2CO_{2(g)} + H_2O_{(g)}   \ \   \ \ \  \Delta H^o_{reaction} = -1544 \ kJ

Then,

1 mole of the ethyne is equal to 26 g of ethyne required for 1544 kJ heat.

Thus, for 218.97 kJ, the amount of ethyne gas required will be:

= \dfrac{26 \ g}{1544 \ kJ} \times 218.97 \ kJ

= 3.69 g

3 0
3 years ago
Which Act is the set of laws signed by former President Nixon that helps keep water clean in the United States?
otez555 [7]

Clean Water Act

Explanation:

The Clean Water Act in 1972 was a set of laws signed by former President Nixon that helps to keep water clean in the United States.

  • The act sets a safe limit for the amount and kind of pollutants that can be released into the water that won't contaminate it.
  • The acts charged the Environmental Protection Agency(EPA) to set a safe limit for nature and amount of pollutants that can be released into the water.
  • This act is one of the several environmental polices in the United States that ensures a safe drinking water is available.

learn more:

Pollution brainly.com/question/10743354

#learnwithBrainly

5 0
3 years ago
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