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Studentka2010 [4]
3 years ago
8

Help only if you know the answer and I will mark brainliest ⚡️⚡️⚡️

Chemistry
2 answers:
vovangra [49]3 years ago
8 0

Answer:

450 km

Explanation:

I) Construct an equation to find the distance:

speed x time = distance

15 x 30 = d

II) Solve:

15 x 30 = 450

450 km

Alchen [17]3 years ago
7 0

Answer:

450 kilometers

Explanation:

i used a calculator

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Which of the following is best described as an acid-base reaction?
seraphim [82]

The reaction which represents an acid-base reaction is: HNO3(aq) + NH3(aq) → NH4*(aq) + NO3(aq).

<h3>What is an acid-base reaction?</h3>

An acid-base reaction is a reaction in which a substance donate protons to another substance which then accepts the proton.

An acid-base reaction usually involves the formation of a salt.

From the given reactions, the acid-base reaction is given below:

  • HNO3(aq) + NH3(aq) → NH4*(aq) + NO3(aq)

In the given reaction, HNO3 donates a proton and NH3 accepts the proton.

Therefore, the reaction which represents an acid-base reaction is: HNO3(aq) + NH3(aq) → NH4*(aq) + NO3(aq).

Learn more about acid-base reaction at: brainly.com/question/15334816

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4 0
2 years ago
What is the charge on an ion that has an atomic number of 16 and contains 14e-?
lora16 [44]
The answer would be 2+ since the atomic number represents how many protons are in the element. In this case, there are 16 protons, but only 14 electrons, which means there are an additional 2 protons, hence the 2+ charge on the ion.
3 0
3 years ago
Do you think precipitation has a greater impact on the rate of chemical weathering or mechanical weathering? Explain
nexus9112 [7]

Greater rainfall has an greater increase on the rate of chemical weathering. Rain is a form of precipitation.

6 0
3 years ago
some students believe that teachers are full of hot air. If I inhale 3.5 liters of gas at a temperature of 19 degrees Celsius an
Afina-wow [57]

Answer:

3.97 L

Explanation:

Data obtained from the question include the following:

Initial volume (V1) = 3.5 L

Initial temperature (T1) = 19 °C

Final temperature (T2) = 58 °C

Final volume (V2) =..?

Next, we shall convert celsius temperature to Kelvin temperature. This can be done as shown below:

Temperature (K) = temperature (°C) + 273

T (K) = T (°C) + 273

Initial temperature (T1) = 19 °C

Initial temperature (T1) = 19 °C + 273 = 292 K

Final temperature (T2) = 58 °C

Final temperature (T2) = 58 °C + 273 = 331 K

Finally, we shall determine the new volume of the gas by using Charles' law equation as shown below:

Initial volume (V1) = 3.5 L

Initial temperature (T1) = 292 K

Final temperature (T2) = 331 K

Final volume (V2) =..?

V1 /T1 = V2 /T2

3.5 /292 = V2 /331

Cross multiply

292 x V2 = 3.5 x 331

Divide both side by 292

V2 = (3.5 x 331) / 292

V2 = 3.97 L

Therefore, the new volume of the gas is 3.97 L.

5 0
3 years ago
Select the mixture which is capable of tolerating addition of a strong acid without altering the pH? a.) 1.0 M HCl, 1.0 M NaCl b
wlad13 [49]

Answer:

d.) 1.0 M HNO2, 1.0 M NaNO2

Explanation:

A buffer is a mixture that is capable of tolerating addition of a strong acid or base without altering the pH substantially.

A buffer is the mixture of a <em>WEAK ACID AND ITS CONJUGATE BASE </em>or a <em>WEAK BASE AND ITS CONJUGATE ACID</em>

<em></em>

In the problems:

a) HCl is a strong acid and NaCl a salt. NO buffer

b) NH3 is a weak base and NaCL a salt. NO buffer

c) HF is a weak acid and NaCl a salt. NO buffer.

<h3>d) HNO2 is a weak acid and NaNO2 its conjugate base. A BUFFER</h3>
7 0
3 years ago
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