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2 years ago

Can you measure tenths if a gram with confidence using balance?

1 answer:

7 0

It depends on the calibration and sensitivity of the balance. If you’re using a lab balance, then yes. Most lab balances are calibrated to the hundredths at a minimum. Take time to tare the scale correctly, and give the sample enough time on the scale to reach a definite number.

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If a metal that had reacted very

Vitek1552 [10]

Answer:

It would react better than what with dilute and will furnish more hydrogen gas.

6 0

2 years ago

Read 2 more answers

What is the mass in grams of 120 liters at STP oh He gas

skad [1K]

The mass of He gas = 21.428 g

<h3>Further explanation</h3>

Given

120 liters of He gas

Required

the mass in grams

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

Mol for 120 L :

$\tt \dfrac{120}{22.4}=5.357~moles$

Mass of He gas(MW=4 g/mol) :

$\tt mass=mol\times Ar\\\\mass=5.357\times 4=21.428~g$

5 0

2 years ago

What state of matter can be compressed? gases solids, liquids, and gases solids liquids 0 fin

Nuetrik [128]

Answer:gasses

Explanation:

3 0

3 years ago

10.0 mL of a HF solution was titrated with a 0.120 N solution of KOH; 29.6 mL of

Ilia_Sergeevich [38]

Answer:

0.355 N of HF

Explanation:

The titration reaction of HF with KOH is:

HF + KOH → H₂O + KF

<em>Where 1 mole of HF reacts per mole of KOH</em>

<em />

Moles of KOH are:

0.0296L × (0.120 equivalents / L) = 3.552x10⁻³ equivalents of KOH = equivalents of HF.

As volume of the titrated solution was 10.0mL, normality of HF solution is:

3.552x10⁻³ equivalents of HF / 0.010L =<em> 0.355 N of HF</em>

3 0

2 years ago

An aqueous solution at 25.0°C contains [H+] = 0.075 M. What is the pH of the solution?

olasank [31]

Answer:

1.131

Explanation:

pH=-logH^+

H^+=0.074

pH=-log 0.074

pH=1.131

7 0

2 years ago