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2 years ago

An indicator is_____ Select all that apply.

Chemistry

1 answer:

crimeas [40]2 years ago

5 0

Answer: C

Explanation:

Indicators are organic weak acids or bases with complicated structures.

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What is a acid and how does it react with metals (chemical reaction)?

Alenkasestr [34]

Explanation:

Acids are substances whose ph is lower than 7.Acids react with most metals to form a salt and hydrogen gas.

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1 year ago

How many grams of NaCl are required to make 150.0 mL of a 5.000 m solution

Oksi-84 [34.3K]

The grams of NaCl that are required to make 150.0 ml of a 5.000 M solution is 43.875 g

calculation

Step 1:calculate the number of moles

moles = molarity x volume in L

volume = 150 ml / 1000 = 0.15 L

= 0.15 L x 5.000 M = 0.75 moles

Step 2: calculate mass

mass = moles x molar mass

molar mass of NaCl = 23 + 35.5 = 58.5 mol /L

mass is therefore =0.75 moles x 58.5 mol /l =43.875 g

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2 years ago

Read 2 more answers

Combustion of hydrocarbons such as undecane (C_11H_24) produces carbon dioxide, a "greenhouse gas." Greenhouse gases in the Eart

bekas [8.4K]

Answer:

Volume of carbon dioxide is 428.23 L.

Explanation:

Below is the chemical reaction or chemical equation for the combustion of hydrocarbons such as undecane into carbon dioxide.

$C_{11}H_{24}(l) + 17O_{2}(g) \to 11CO_{2} (g) + 12H_2O(g)$

Here, undecane is in liquid form that reacts with gaseous oxygen (combustion) and produces carbon dioxide and water as a product in the gaseous form.

The molar mass of undecane = $156.31 g/mol.$

$\text{Number of moles} = \frac{260g}{156.31g/mol} = 1.66 \ mol.$

From the equation, it can be seen that 1 mole of undecane produces 11 moles of carbon dioxide. Therefore, 1.66 mol will produce 18.26 mol of carbon dioxide.

Now find the volume of 18.26 mol of carbon dioxide when the temperature is 13 degrees Celsius and pressure is 1 atm.

$V = \frac{nRT}{P} \\$

$V = \frac{18.26 \times 0.082 \times 286 \ K}{1atm} \\$

$V = 428.23 \ L$

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2 years ago

A relationship between two organisms that benefits both organisms is called

Alex777 [14]

Answer:

Mutualism

Explanation:

A relationship in which both benefit

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2 years ago

Wha is boiling point<br>

Troyanec [42]

The boiling point is the temperature at which the vapor pressure of a liquid equals the external pressure surrounding the liquid. Therefore, the boiling point of a liquid depends on atmospheric pressure.

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2 years ago