1) All matter is made of atoms. Atoms are indivisible and indestructible.
2) All atoms of a given element are identical in mass and properties
3) Compounds are formed by a combination of two or more different kinds of atoms.
4) A chemical reaction is a rearrangement of atoms.
1 and 2 were proved wrong.
Answer:
Amoebas use their pseudopods to ingest food by a method called phagocytosis (Greek: phagein, to eat). The streaming of protoplasm inside the pseudopods moves the amoeba forward.
Explanation:
Tollen's test is a test for aldehyde giving a silver mirror in its presence, hence also called silver mirror test. Among the choice, c. pentanal is the aldehyde. Answer is C.
2HCl + Ca(OH)2 = CaCl2 + 2H20
Before balancing on the left side there was 1 chlorine (Cl) atom, 2 oxygen (O) atom, 2 hydrogens (H) atoms and 1 calcium (Ca) atom. In the right side, there was 2 chlorine (Cl) atoms, 1 oxygen (O) atom, 2 hydrogens (H) atoms and 1 calcium (Ca) atom.
To balance the chemical equation we hat to place a coefficient of 2 in front of HCl, and coefficient 2 of in front of H2O.
I’m pretty sure it’s D because energy measures the kinetic, thermal, electrical, chemical, nuclear and other forms.
