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makkiz [27]
3 years ago
8

Need help with this.

Chemistry
2 answers:
Nostrana [21]3 years ago
8 0

Answer:

D

Explanation:

because it is changing to its own compound of chemicals.

ankoles [38]3 years ago
3 0
The answer would be D!
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Why must energy be controlled?​
eduard

Answer:

Energy should be saved and controlled as it is better for the environment. Excess use of energy of any kind can be disastrous. For example, a kind of energy is stored in the food. If excess food is consumed and wasted, then the country and other people will have to face consequences of it. Malnutrition will rise.

Another kind of energy is the energy in the fuel. If fuel consumption is not controlled then in the near future the resources for the making of fuel will be depleted.

6 0
3 years ago
According to the activity series, which one of the following reactions will occur?
Korvikt [17]

Answer:

i think

SrF2 + Br2 --->

dont count me on it

Explanation:

balanced

3 0
3 years ago
Which will have the lowest boiling point?
In-s [12.5K]

Some of the solutions exhibit colligative properties. These properties depend on the amount of

solute dissolved in a solvent. These properties include freezing point depression, boiling

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8 0
3 years ago
Read 2 more answers
How many moles are in 0.821g of lead?
Ivenika [448]

Answer:

3.96 × 10⁻³ mol Pb

Explanation:

Step 1: Find molar mass

Pb (Lead) - 207.2 g/mol

Step 2: Use Dimensional Analysis

0.821 \hspace{2} g \hspace{2} Pb(\frac{1 \hspace{2} mol \hspace{2} Pb}{207.2 \hspace{2} g \hspace{2} Pb} ) = 0.003962 mol Pb

Step 3: Simplify

We have 3 sig figs

0.003962 mol Pb ≈ 0.00396 mol Pb

0.00396 mol Pb = 3.96 × 10⁻³ mol Pb

3 0
3 years ago
the student determines the molar mass of the gas to be 64 g mol-1. write the expression (set-up) for calculating the percent err
sleet_krkn [62]

Answer:

Percentage error = \frac{(64 - 58)}{58} x 100%

Explanation:

In order to calculate the percentage error in the student's calculation, the following formula will be used:

Percentage error = \frac{(experimental molar mass - theoretical molar mass)}{theoretical molar mass} x 100%

experimental molar mass = 64 g/mol

theoretical molar mass = 58 g/mol

Hence, the expression becomes:

Percentage error = \frac{(64 - 58)}{58} x 100%

7 0
3 years ago
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