Abulb thermometer gives an indoor temperature reading of 21°c. a digital thermometer in the same room gives a reading of 20.7°c. which device is more precise? explain

Digital thermometer is more precise.

Explanation:

Digital thermometer is more precise because it is showing the temperature more precisely with 1 digit after decimal whereas the bulb temperature is measuring the temperature and giving the significant value.

Since the digital thermometer is measure temperature up to 1 digits of decimal, digital thermometer is more precise.

Digital thermometer is more precise

Explanation:

As we know that precise reading is that reading where we can measure upto more numbers after decimal

so let say a student A measure a mass of object as

m = 23.5 g

while other student B measure same mass as

m = 23.486 g

then here student A measure the mass one digit after decimal while student B measure mass 3 digits after decimal

so here student B is more precise than student A

similarly here digital thermometer measure the temperature as 1 digit after decimal so it is more precise

the answer is false

explanation:

  1.the balanced   chemical equation is as below

cu +   2 ag(no)₃ → cu(no₃)₂   +2 ag

2.the   much silver   produced   is   50.9 g

step 1: find the   moles of cu

moles =   mass÷   molar mass

  from periodic table the molar mass of cu = 63.5 g/mol

moles is therefore = 15.00 g÷ 63.5 g/mol = 0.236   moles

step 2: use the mole ratio to determine the   moles of ag

from equation above   cu: ag   is 1: 2

therefore the moles of ag   =0.236   moles   x 2/1 =0.472   moles

step 3: find the mass   of ag

mass = moles x molar mass

from periodic table   the molar mass of ag =107.87 g/mol

mass   = 0.472   moles x 107.87 g/mol = 50.9 g

3.   the   much   silver   collected worth is   1.797 oz

  convert   50.9 g   to oz

that is   1 gram = 0.0353 oz

          50.9 grams =?   oz

by cross multiplication

={(50.9 grams x 0.0353 oz) / 1   gram}   =1.797 oz