Top answers

What is the mass (in grams) of 0.1 moles of CaCO3?

Use the equation mass(g) = moles x MrThe moles are given in the question, moles= 0.1 molLook at a periodic table to work out the Mr of CaCO3: Ca= 40 C= 12 O= 16 Therefore Mr= 40+12+(16x3) = 100So mass (g)= 0...
SS
Answered by Sophie S. • Chemistry tutor
22438 Views

Why can graphite conduct electricity but diamond can not?

In diamond the carbon atoms are bonded to four other atoms. Whereas, in graphite each carbon atom is only bonded to three other atoms. Therefore, there are delocalised (free) electrons in graphite, which can...
SS
Answered by Sophie S. • Chemistry tutor
67606 Views

Describe the reflex arc.

A stimulus (for example a pin) stimulates the receptor which causes a nerve impulse in the sensory neuron. The impulse travels to a synapse in the spinal cord, where chemicals diffuse across the gap in the s...
SS
Answered by Sophie S. • Biology tutor
10699 Views

What is a metabolic rate?

The rate of chemical reactions within the body.
SS
Answered by Sophie S. • Biology tutor
4390 Views

Could you run through the stages in the light-independent reaction (Calvin Cycle) of photosynthesis?

Okay, so here we have what seems like a very daunting ​ list of chemical reactions to remember that don't seem to make any sense! But don't worry ​, with practice you will soon grasp the concept quickly. ​ L...
SC
Answered by Shane C. • Biology tutor
3681 Views