Question

9) Mixtures can vary in composition throughout a sample it called a- heterogeneous mixture b- homogeneous mixture - Solution d-compound 10) which of the following quantity represents a volume measurement? a-12 m b-2.35 L/S C-31 m d-11x10* dm 11) A combination of sand, salt, and water is an example of a a-homogeneous mixture b- pure substance C-compound d- heterogeneous mixture 12) Which one of the following is the highest temperature? a-302 K b-38 °C C-96 °F d- none of the above 13) Which calculation clearly shows a conversion between temperatures in degrees Celsius in Kelvins, K? a-K= 273.15-°C b-K-°C c-K=[°C +32] 1.8 d-K="C+273.15 14) Precision refers to a-how close a measured number is to other measured numbers b- how close a measured number is to zero c- how close a measured number is to infinity d-how close a measured number is to the true value 15) From the following, the smallest subatomic particle is: a- Nucleus - Electron C-Neutron d- Proton 16) All atoms of the element carbon have the same a-Number of neutrons b-Number of protons - Mass d-Density 17) Naturally, chlorine is composed of 75.78% 35Cl(atomic mass 34 96 u) and 24.22%"Cl (atomic mass 36.96 u). The atomic mass of chlorine is: a-34.96 u b-36.96 u C-35.45 u d-71.93 u

Answer 1

a) Heterogeneous mixture (a) a It has components whose proportions vary throughout the sample. 10) 31 m² (c) unit of volume is m² ode L sa