Calculate the atomic mass of element X if there are two isotopes of this element (X-24 and X-28) and 75% of all X atoms are X-28 isotopes? 52 amu 26 amu 4 amu 27 amu

Write conversion factors (as ratios) for the number of: (a) kilometers in 1 mile (b) liters in 1 cubic foot (c) grams in 1 ounce

2. An exothermic reaction releases 86.5 kJ. How many kilocalories of energy are released?

Name the salt [ni (h2o) 3 (co) ]so4. the oxidation number of nickel is + 2. enter the name.

What is the force that opposes the sliding motion of two touching surfaces?

If you place a 4.00 g effervescent antacid pill into 85 mL (85 g) of water in a 90 g glass, how much will the glass of water weigh once the antacid pill has dissolved?

When a bimetallic bar made of copper and iron strips is heated, the bar bends toward the iron strip. the reason for this is?

Where does transcription happen? why is it only in this location?

True or false during decomposition nitrogen gas is changed into nitrogen compounds

Which of the following is a suggested practice to invite families to participate in decision-making and goal-setting for their child? A. Advocacy events B. Take-home backpacks C. Family/teacher conference D. Weekly newsletters

TRUE OR FALSE A stable mixture of two or more mixable substances is called an emulsion