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stepladder [879]
3 years ago
8

I need to clean the Kwik Switch thermometer betweeneach measurement.OTrueFalse​

Chemistry
2 answers:
ale4655 [162]3 years ago
8 0
True becuase it becomes dirty and impure after just one use
Jet001 [13]3 years ago
3 0

The answer is true.

<u>Explanation</u>:

  • The Kwik Switch thermometer is used for measuring the temperature of food or meat internally.
  • It needs to be cleaned after each measurement to prevent any bacteria or microscopes from hanging on to the probe.
  • It would be best to wash it with warm water and sanitize the probe. Then wash it off and allow it to dry before using the next time.
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How to calculate the amount of Moles of calcium carbonate<br> Show work
den301095 [7]

Answer:

1 moles Calcium Carbonate = 100.0869 gram using the molecular weight calculator and the molar mass of CaCO3. ... How many moles Calcium Carbonate in 1 grams? The answer is 0.0099913175450533.

Explanation:

4 0
3 years ago
Be sure to answer all parts.
tangare [24]

Answer:

(a) cesium bromide (CsBr): 9.15 grams

(b) calcium sulfate (CaSO4):  5.85 grams

(c) sodium phosphate (Na3PO4): 7.05 grams

(d) lithium dichromate (Li2Cr2O7):  9.88 grams

(e) potassium oxalate (K2C2O4):   7.15 grams

Explanation:

<u>(a) cesium bromide (CsBr):</u>

Molar mass of CsBR = 212.81 g/mol

Number of moles = molarity * volume

Number of moles = 0.100 M *0.43 L

Number of moles = 0.043 moles

Mass of CsBr required = moles * Molar mass

Mass of CsBr required = 0.043 moles * 212.81 g/mol

Mass of CsBr required = 9.15 grams

<u>(b) calcium sulfate (CaSO4):</u>

Molar mass of CaSO4 = 136.14 g/mol

Mass of CaSO4 required = moles * Molar mass

Mass of CaSO4 required = 0.043 moles * 136.14 g/mol

Mass of CaSO4 required = 5.85 grams

<u>(c) sodium phosphate (Na3PO4):</u>

Molar mass of Na3PO4 = 163.94 g/mol

Mass of Na3PO4 required = moles * Molar mass

Mass of Na3PO4 required = 0.043 moles * 163.94 g/mol

Mass of Na3PO4 required = 7.05 grams

<u>(d) lithium dichromate (Li2Cr2O7):</u>

Molar mass of Li2Cr2O7 = 229.87 g/mol

Mass of Li2Cr2O7 required = moles * Molar mass

Mass of Li2Cr2O7 required = 0.043 moles * 229.87 g/mol

Mass of Li2Cr2O7 required = 9.88 grams

<u>(e) potassium oxalate (K2C2O4):</u>

Molar mass of K2C2O4 = 166.22 g/mol

Mass of K2C2O4 required = moles * Molar mass

Mass of K2C2O4 required = 0.043 moles * 166.22 g/mol

Mass of K2C2O4 required = 7.15 grams

7 0
3 years ago
The largest ruby isnthe world is 10.9 cm long, 9.1 cm wide and 5.8 cm thick, giving
Maslowich
You have to use density=mass/volume formula:


3.97= \frac{x}{575}

Solve for x and you get 2282.75 grams
6 0
3 years ago
How much energy is required to change the temperature of 35.0 g of Lead
Nezavi [6.7K]

Answer:

Q = 270 Joules (2 sig. figs. as based on temperature change.)

Explanation:

Heat Transfer Equation of pure condensed phase substance => Q = mcΔT

Mixed phase (s ⇄ l melting/freezing, or l ⇄ g boiling/condensation) heat transfer equation => Q = m∙ΔHₓ; ΔHₓ = phase transition constant

Since this is a pure condensed phase (or, single phase) form of lead (Pb°(s)) and not melting/freezing or boiling/condensation, one should use

Q = m·c·ΔT

m = mass of lead = 35.0g

c = specific heat of lead = 0.16J/g°C

ΔT = Temp change = 74°C - 25°C = 49°C

Q = (35.0g)(0.16J/g·°C )(49°C) = 274.4 Joules ≅ 270 Joules (2 sig. figs. as based on temperature change.)

7 0
3 years ago
If sulfur dioxide and oxygen can be made into sulfur trioxide, what is the reverse reaction? A. SO3 +O2à SO3 B. 2SO2 + O2à 2SO3
ycow [4]
REVERSE REACTION WILL BE SO2+O2
7 0
3 years ago
Read 2 more answers
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