based on the information in the table, which type of glass is unknown a?\n| | contains elements | contains…

based on the information in the table, which type of glass is unknown a?\n| | contains elements | contains plastic | when exposed to high heat | when exposed to high impact |\n|--|--|--|--|--|\n| unknown a | si, o, na, b, al | no | no visible change | shatters |\n| unknown b | si, o, na, ca, al, mg | no | shatters | shatters |\n| unknown c | si, o, na, ca, al, mg | yes | cracks but remains together | cracks but remains together |\n| unknown d | si, o, na, ca, al, mg | no | no visible change | breaks into tiny squares |

based on the information in the table, which type of glass is unknown a?\n| | contains elements | contains plastic | when exposed to high heat | when exposed to high impact |\n|--|--|--|--|--|\n| unknown a | si, o, na, b, al | no | no visible change | shatters |\n| unknown b | si, o, na, ca, al, mg | no | shatters | shatters |\n| unknown c | si, o, na, ca, al, mg | yes | cracks but remains together | cracks but remains together |\n| unknown d | si, o, na, ca, al, mg | no | no visible change | breaks into tiny squares |

Answer

Explanation:

Step1: Analyze element composition

Unknown A has elements Si, O, Na, B, Al and no plastic.

Step2: Check heat - impact responses

When exposed to high heat, no visible change; when exposed to high impact, it shatters. Comparing with other unknowns, Unknown A's properties match a common type of glass based on these characteristics. Since it doesn't have plastic like Unknown C and has different impact - heat responses from Unknown B and D.

Answer:

Unknown A is a type of glass with the given element composition and physical responses to heat and impact as described in the table.