Laboratory Weighing Practices Quiz
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Questions and Answers

Which equipment is specifically designed for high precision in weighing laboratory samples?

  • Spring Scale
  • Analytical Balance (correct)
  • Triple Beam Balance
  • Digital Scale

    • What is the first step to take before weighing a sample?

  • Clean the balance (correct)
  • Add the sample
  • Tare the scale
  • Select the weighing container

    • Why is it important to wait for the display to stabilize on a digital scale before recording the weight?

  • To allow for weight fluctuation
  • To ensure accurate tare measurement
  • To prevent a false reading due to sample movement (correct)
  • To avoid re-taring the scale

    • What personal protective equipment should be worn in the lab while weighing hazardous substances?

    <p>Gloves and goggles</p> Signup and view all the answers

    Which of the following is NOT a general step for weighing in a laboratory?

    <p>Analyze the chemical composition</p> Signup and view all the answers

    What is the first step to ensure accurate weight measurement in a laboratory?

    <p>Prepare the balance/scale</p> Signup and view all the answers

    Which type of weighing equipment is typically the most precise for laboratory use?

    <p>Analytical Balance</p> Signup and view all the answers

    What should be done before adding a substance to the balance?

    <p>Tare the scale</p> Signup and view all the answers

    Which statement about safety precautions in a laboratory is correct?

    <p>Personal protective equipment must be used when handling substances.</p> Signup and view all the answers

    What is the purpose of waiting for the display to stabilize before recording the weight?

    <p>To avoid fluctuating readings</p> Signup and view all the answers

    What is the conversion factor for 10 kilograms to grams?

    <p>10000 grams</p> Signup and view all the answers

    How many grams are there in 25 kilograms?

    <p>25000 grams</p> Signup and view all the answers

    If you have 50 kilograms, how many grams does that equal?

    <p>50000 grams</p> Signup and view all the answers

    Which unit is equivalent to 1,000 milligrams?

    <p>1 gram</p> Signup and view all the answers

    Which of the following correctly shows the relationship between kilograms and grams?

    <p>1 kg = 1000 grams</p> Signup and view all the answers

    If you have 500 grams, how many kilograms do you have?

    <p>0.5 kg</p> Signup and view all the answers

    What is the total in grams if you have 5 kilograms?

    <p>5000 grams</p> Signup and view all the answers

    How many micrograms are in 0.1 kilograms?

    <p>100,000 µg</p> Signup and view all the answers

    Which of the following is the smallest unit of weight among the options provided?

    <p>Nanogram</p> Signup and view all the answers

    What is the result of converting 2 kilograms to grams?

    <p>2,000 g</p> Signup and view all the answers

    What is the base unit of weight in the metric system?

    <p>Gram</p> Signup and view all the answers

    How many milligrams are there in 1.5 kilograms?

    <p>1,500,000 mg</p> Signup and view all the answers

    If you have 2500 mg, how many kilograms is that?

    <p>0.0025 kg</p> Signup and view all the answers

    How many micrograms are equivalent to 10 grams?

    <p>10,000,000 µg</p> Signup and view all the answers

    What is the smallest unit of weight listed in the metric system?

    <p>Nanogram</p> Signup and view all the answers

    What is the conversion factor for changing kilograms to grams?

    <p>Multiply by 1000</p> Signup and view all the answers

    How many nanograms are in 0.002 kilograms?

    <p>2,000,000 ng</p> Signup and view all the answers

    If you have 150 mg of material, how much is that in grams?

    <p>0.15 g</p> Signup and view all the answers

    How many grams are equivalent to 2 kilograms?

    <p>2000 g</p> Signup and view all the answers

    Which of the following weights is equal to 0.1 kilograms in micrograms?

    <p>100,000 µg</p> Signup and view all the answers

    What conversion is correct for 2500 mg to kilograms?

    <p>0.0025 kg</p> Signup and view all the answers

    What is the value of 0.003 kilograms in nanograms?

    <p>30,000,000 ng</p> Signup and view all the answers

    How many grams are in 1.5 kg?

    <p>1500 g</p> Signup and view all the answers

    What is the equivalent of 2500 mg in kilograms?

    <p>0.0025 kg</p> Signup and view all the answers

    If you have 10 g, how many micrograms is that?

    <p>1,000,000 µg</p> Signup and view all the answers

    What is the conversion of 500,000 µg to kilograms?

    <p>0.5 kg</p> Signup and view all the answers

    How many nanograms are in 0.002 kg?

    <p>2,000,000 ng</p> Signup and view all the answers

    What is the equivalent weight in kilograms of 15,000 grams?

    <p>15 kg</p> Signup and view all the answers

    Which of the following correctly converts 200 grams to kilograms?

    <p>0.2 kg</p> Signup and view all the answers

    How many grams are in 8.7 kilograms?

    <p>8700 g</p> Signup and view all the answers

    What is the equivalent of 0.1 grams in kilograms?

    <p>0.0001 kg</p> Signup and view all the answers

    Which of the following conversions is accurate?

    <p>2000 g to 2 kg</p> Signup and view all the answers

    If you convert 5 grams to milligrams, what is the result?

    <p>500 mg</p> Signup and view all the answers

    What is the equivalent of 300,000 micrograms in grams?

    <p>0.3 g</p> Signup and view all the answers

    Converting 0.1 grams to milligrams results in which value?

    <p>100 mg</p> Signup and view all the answers

    How many micrograms are there in 0.002 kilograms?

    <p>2,000,000 µg</p> Signup and view all the answers

    What is the weight in kilograms of a substance weighing 3 million micrograms?

    <p>0.3 kg</p> Signup and view all the answers

    Which statement correctly converts 150 mg to grams?

    <p>150 mg equals 0.015 g</p> Signup and view all the answers

    What is the microgram equivalent of 0.1 kilograms?

    <p>100,000 µg</p> Signup and view all the answers

    If you have 2500 milligrams, how many kilograms does that equal?

    <p>0.0025 kg</p> Signup and view all the answers

    How many nanograms does 0.002 kilograms equal?

    <p>2,000,000 ng</p> Signup and view all the answers

    What is the result of converting 75 grams to milligrams?

    <p>75,000 mg</p> Signup and view all the answers

    1 microgram is equivalent to how many grams?

    <p>0.000001 g</p> Signup and view all the answers

    If you convert 150 milligrams to grams, what is the result?

    <p>0.15 g</p> Signup and view all the answers

    What is the correct conversion from 3,000,000 micrograms to grams?

    <p>3 g</p> Signup and view all the answers

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