The atomic and mass numbers for four different atoms are given below. which two are isotopes of the same element?

atom atomic number mass number
a 100 257
b 101 257
c 101 260
d 102 259

a.) a and b
b.) b and c
c.) b and d
d.) c and d

The is a particle with one unit of positive charge a. proton b. positron c. electron d. nucleus awnser quick it is a important science test!

If 1.8 l of water is added to 2.5l of a 7.0 m koh solution, what is the molarity of the new solution

Someone offer some answers to this, i will give 98 coins and mark as brainliest! i will put the rest of the lab down in the comments,solutions pre-lab questions: in this lab, you will make fruit drinks with powdered drink mix. complete the pre-lab questions to get the values you need for your drink solutions. calculate the molar mass of powered fruit drink mix, made from sucrose (c12h22o11).using stoichiometry, determine the mass of powdered drink mix needed to make a 1.0 m solution of 100 ml. (hint: use molarity = to find the moles of drink mix, then convert moles to grams using a mole conversion.)what mass of powdered drink mix is needed to make a 0.5 m solution of 100 ml?